# This file is deprecated as per GLEP 56 in favor of metadata.xml. Please add
# your descriptions to your package's metadata.xml ONLY.
# * generated automatically using egencache *

app-accessibility/brltty:api - build brltty's application program interface
app-accessibility/brltty:beeper - support the console tone generator
app-accessibility/brltty:contracted-braille - support in-line contracted braille
app-accessibility/brltty:fm - support for the sound card synthesizer
app-accessibility/brltty:midi - support the musical instrument digital interface
app-accessibility/brltty:pcm - support for sound card digital audio
app-accessibility/brltty:speech - speech support
app-accessibility/eflite:16k_voice - Use a higher-quality voice.
app-accessibility/emacspeak:espeak - Adds support for the espeak tts engine
app-accessibility/festival-it:mbrola - Adds support for mbrola voices
app-accessibility/freetts:jsapi - build Java Speech API (JSAPI)
app-accessibility/freetts:mbrola - Adds support for mbrola voices
app-accessibility/orca:braille - Enable braille support
app-accessibility/simon:opencv - Use media-libs/opencv
app-accessibility/simon:pim - Use kde-apps/kdepimlibs
app-accessibility/simon:sphinx - Build sphinx backend (pulls app-accessibility/julius if disabled
app-accessibility/speech-dispatcher:espeak - Adds support for espeak speech engine
app-accessibility/speech-dispatcher:flite - Adds support for flite speech engine
app-accessibility/speechd-el:brltty - brltty support
app-admin/bcfg2:cheetah - Include dev-python/cheetah support
app-admin/bcfg2:genshi - Include dev-python/genshi support
app-admin/bcfg2:server - Installs scripts to be used on the server-side of this app
app-admin/calamares:pythonqt - Enable PythonQt-based module interface
app-admin/clsync:cgroups - Use cgroups to limit /dev access.
app-admin/clsync:cluster - Enable clustering support (allows master-master clsync on multiple hosts). Not fully implemented yet.
app-admin/clsync:control-socket - Enable AF_UNIX control socket support.
app-admin/clsync:extra-debug - Enable extra debugging. This will hurt performance badly. Be ready for tons of output.
app-admin/clsync:extra-hardened - Enable extra security checks. This will hurt performance.
app-admin/clsync:gio - Enable GIO for FS monitoring (glib based alternative to inotify interface, not recommended; if both are compiled, may be selected at runtime).
app-admin/clsync:highload-locks - Allows to use spinlocks for short delays instead of mutexes, but only on SMP systems.
app-admin/clsync:namespaces - Enable namespaces isolation.
app-admin/collectd:contrib - Install user-contributed files in the doc directory
app-admin/collectd:filecaps - When set collectd daemon will have set required capabilities to run most plugins even if run as unprivileged user
app-admin/collectd:java - Must be set (workaround for java-pkg-opt-2 eclass limitation) when you want java or genericjmx plugin
app-admin/collectd:udev - Enable optional udev usage in disk plugin; Required for smart plugin
app-admin/collectd:xfs - Enable optional capability to filter on XFS file system in df plugin; Requires XFS headers from sys-fs/xfsprogs
app-admin/conky:apcupsd - Enable support for sys-power/apcupsd
app-admin/conky:audacious - Enable monitoring of music played by media-sound/audacious
app-admin/conky:cmus - Enable monitoring of music played by media-sound/cmus
app-admin/conky:eve - Enable support for the eve-online skill monitor
app-admin/conky:ical - Enable support for events from iCalendar (RFC 5545) files using dev-libs/libical
app-admin/conky:iostats - Enable support for per-task I/O statistics
app-admin/conky:irc - Enable support for displaying everything from an irc channel using net-libs/libircclient
app-admin/conky:lua-cairo - Enable if you want Lua Cairo bindings
app-admin/conky:lua-imlib - Enable if you want Lua Imlib2 bindings
app-admin/conky:lua-rsvg - Enable if you want Lua RSVG bindings
app-admin/conky:math - Enable support for glibc's libm math library
app-admin/conky:moc - Enable monitoring of music played by media-sound/moc
app-admin/conky:mpd - Enable monitoring of music controlled by media-sound/mpd
app-admin/conky:nano-syntax - Enable syntax highlighting for app-editors/nano
app-admin/conky:nvidia - Enable reading of nvidia card temperature sensors via media-video/nvidia-settings
app-admin/conky:portmon - Enable support for tcp (ip4) port monitoring
app-admin/conky:thinkpad - Enable support for IBM/Lenovo notebooks
app-admin/conky:weather-metar - Enable support for metar weather service
app-admin/conky:weather-xoap - Enable support for metar and xoap weather service
app-admin/conky:webserver - Enable support to act as a webserver serving conkys output using net-libs/libmicrohttpd
app-admin/conky:xmms2 - Enable monitoring of music played by media-sound/xmms2
app-admin/diamond:mongo - Enable MongoDB support
app-admin/diamond:redis - Enable Redis support
app-admin/diradm:automount - Support for automount data in LDAP
app-admin/diradm:irixpasswd - Support for storing separate IRIX passwords
app-admin/ego:zsh-completion - Enable ZSH completion
app-admin/elektra:augeas - Enable plugin for reading and writing configuration files with help from Augeas
app-admin/elektra:ini - Enable new, advanced ini support
app-admin/elektra:simpleini - Enable simpleini support
app-admin/elektra:uname - Enable uname information for the key database
app-admin/elektra:yajl - Enable yajl support
app-admin/gkrellm:X - Build both the X11 gui (gkrellm) and the server (gkrellmd). Disabling this flag builds the server only.
app-admin/gkrellm:gnutls - Enable SSL support for mail checking with net-libs/gnutls (overrides 'ssl' USE flag)
app-admin/gkrellm:hddtemp - Enable monitoring harddrive temperatures via app-admin/hddtemp
app-admin/gkrellm:lm_sensors - Enable monitoring sensors via sys-apps/lm_sensors
app-admin/gkrellm:ntlm - Enable NTLM authentication for mail checking with net-libs/libntlm
app-admin/gkrellm:ssl - Enable SSL support for mail checking with dev-libs/openssl
app-admin/glance:swift - Adds swift storage support
app-admin/gtkdiskfree:gtk2 - Support GTK+ 2.x instead of GTK+ 3.x
app-admin/hddtemp:network-cron - Monthly cronjob to update hddtemp.db.
app-admin/keepass:aot - Generate native code at build time, rather than runtime.
app-admin/keepassxc:autotype - Add support to autotype the passwords into other applications
app-admin/keepassxc:http - Add http support
app-admin/keepassxc:yubikey - Enable database unlocking via YubiKey.
app-admin/lastpass-cli:X - Use x11-misc/xclip or x11-misc/xsel to copy passwords to the clipboard.
app-admin/lastpass-cli:pinentry - Use app-crypt/pinentry to prompt for passwords.
app-admin/logrotate:acl - Installs acl support
app-admin/logrotate:bzip2 - Compresses rotated log files with bzip2 instead of gzip
app-admin/logrotate:cron - Installs cron file
app-admin/logrotate:selinux - Installs Security Enhanced Linux support
app-admin/matter:entropy - Add Entropy support
app-admin/mcollective:client - Install client utilities
app-admin/mms-agent:monitoring - Install the monitoring agent
app-admin/openrc-settingsd:systemd - Use the versions of dbus and polkit files provided by sys-apps/systemd
app-admin/packagekit-base:command-not-found - Enable packagekit support on shell "command not found"
app-admin/packagekit-base:cron - Install cron script for auto-update
app-admin/packagekit-base:elogind - Enable elogind support to get user session
app-admin/packagekit-base:entropy - Enable Entropy backend
app-admin/pass:X - Use x11-misc/xclip to copy passwords to the clipboard.
app-admin/pass:dmenu - Add support for x11-misc/dmenu with the 'passmenu' program.
app-admin/pass:fish-completion - Enable fish completion support.
app-admin/pass:git - Use dev-vcs/git for password revisions.
app-admin/pass:importers - Allow importing passwords from other password managers using various contributed scripts.
app-admin/passwordsafe:minimal - Avoid collision with app-misc/pwsafe
app-admin/passwordsafe:xml - Enable XML import support
app-admin/passwordsafe:yubikey - Enable support for Yubikey
app-admin/prelude-manager:dbx - Enables Prelude Manager storing Prelude alerts into database through dev-libs/libpreludedb .
app-admin/prelude-manager:tcpwrapper - Enables Prelude Manager using tcp wrapper. It requires sys-apps/tcp-wrappers .
app-admin/puppet:augeas - Enable augeas support
app-admin/puppet:diff - Enable diff support
app-admin/puppet:experimental - Add patches for things in testing
app-admin/puppet:rrdtool - Enable rrdtool support
app-admin/puppet:shadow - Enable shadow support
app-admin/puppet-agent:experimental - Add patches for things in testing
app-admin/puppet-agent:puppetdb - Adds puppetdb support
app-admin/puppetserver:puppetdb - Adds support for connecting to puppetdb
app-admin/pwgen:livecd - Install init script for root password scrambling on boot
app-admin/rsyslog:dbi - Build the general database output module (requires dev-db/libdbi)
app-admin/rsyslog:elasticsearch - Build the Elasticsearch output module (requires net-misc/curl)
app-admin/rsyslog:gcrypt - Add support for encrypted log files using dev-libs/libgcrypt
app-admin/rsyslog:grok - Build the grok modify module (requires dev-libs/grok)
app-admin/rsyslog:jemalloc - Use dev-libs/jemalloc for allocations.
app-admin/rsyslog:kafka - Build the Apache Kafka input/output module (requires dev-libs/librdkafka)
app-admin/rsyslog:kerberos - Build the GSSAPI input and output module (requires virtual/krb5)
app-admin/rsyslog:libressl - Use dev-libs/libressl for building the rfc5424hmac modify module (requires rfc5424hmac USE flag)
app-admin/rsyslog:mdblookup - Build the MaxMind DB lookup message modify plugin using dev-libs/libmaxminddb
app-admin/rsyslog:mongodb - Build the MongoDB output module (requires dev-libs/libmongo-client)
app-admin/rsyslog:mysql - Build the MySQL database output module (requires virtual/mysql)
app-admin/rsyslog:normalize - Build the normalize modify module (requires dev-libs/libee and dev-libs/liblognorm)
app-admin/rsyslog:omhttpfs - Build the httpfs output module (requires net-misc/curl)
app-admin/rsyslog:omudpspoof - Build the udpspoof output module (requires net-libs/libnet)
app-admin/rsyslog:postgres - Build the PostgreSQL database output module (requires dev-db/postgresql)
app-admin/rsyslog:rabbitmq - Build the RabbitMQ output module (requires net-libs/rabbitmq-c)
app-admin/rsyslog:redis - Build the Redis output module using (requires dev-libs/hiredis)
app-admin/rsyslog:relp - Build the Reliable Event Logging Protocol (RELP) output module (requires dev-libs/librelp)
app-admin/rsyslog:rfc3195 - Build the rfc3195 input module (requires dev-libs/liblogging)
app-admin/rsyslog:rfc5424hmac - Build the rfc5424hmac modify module (requires dev-libs/openssl or dev-libs/libressl)
app-admin/rsyslog:snmp - Build the snmp modify and output module (requires net-analyzer/net-snmp)
app-admin/rsyslog:ssl - Add support for encrypted client/server communication (requires net-libs/gnutls)
app-admin/rsyslog:systemd - Build the journal input and output module (requires sys-apps/systemd)
app-admin/rsyslog:usertools - Installs the user tools (rsgtutil, rscryutil...) corresponding to the set USE flags
app-admin/rsyslog:uuid - Include UUIDs in messages (requires sys-apps/util-linux)
app-admin/rsyslog:zeromq - Build the ZeroMQ input and output modules (requires net-libs/czmq)
app-admin/sagan:libdnet - Add support for dev-libs/libdnet
app-admin/sagan:lognorm - Add support for log/rules normalizations via dev-libs/liblognorm
app-admin/sagan:pcap - Add support for network packet capture via net-libs/libpcap
app-admin/sagan:smtp - Build witch SMTP (E-Mail) support
app-admin/sagan:snort - Add support to interact with Snort IDE using net-analyzer/snortsam'
app-admin/sagan-rules:lognorm - Install normalize rules support with dev-libs/liblognorm
app-admin/salt:cherrypy - Enable support for using cherrypy.
app-admin/salt:gnupg - Enable support for gnupg via python-gnupg.
app-admin/salt:keyring - Enable support for keyrings via python-keyring.
app-admin/salt:libcloud - Enable salt-cloud support via libcloud.
app-admin/salt:libvirt - Support managing virtual machines with app-emulation/libvirt.
app-admin/salt:mako - Add support for using the mako template engine for parsing salt states.
app-admin/salt:mongodb - Support returning data to a mongodb server.
app-admin/salt:neutron - Support the OpenStack neutron network service.
app-admin/salt:nova - Enable support for the OpenStack Nova API
app-admin/salt:openssl - Add support for using TLS via OpenSSL.
app-admin/salt:portage - Add support for package state enforcement using sys-apps/portage
app-admin/salt:raet - Add support for the new RAET transport.
app-admin/salt:redis - Support returning data to a redis database.
app-admin/salt:timelib - Use timelib to parse english textual date descriptions.
app-admin/salt:zeromq - Add support for the zeromq transport.
app-admin/sshguard:ipfilter - Enable ipfilter firewall support (only for *bsd)
app-admin/sudo:gcrypt - Use SHA2 from dev-libs/libgcrypt instead of sudo's internal SHA2.
app-admin/sudo:offensive - Let sudo print insults when the user types the wrong password.
app-admin/sudo:openssl - Use SHA2 from dev-libs/openssl instead of sudo's internal SHA2.
app-admin/sudo:sendmail - Allow sudo to send emails with sendmail.
app-admin/sysklogd:logrotate - use app-admin/logrotate for rotating logs rather than custom cron scripts
app-admin/syslog-ng:amqp - Enable support for AMQP destinations
app-admin/syslog-ng:json - Enable support for JSON template formatting via dev-libs/json-c
app-admin/syslog-ng:mongodb - Enable support for mongodb destinations
app-admin/syslog-ng:pacct - Enable support for reading Process Accounting files (EXPERIMENTAL, Linux only)
app-admin/syslog-ng:redis - Enable support for Redis destinations
app-admin/syslog-ng:smtp - Enable support for SMTP destinations
app-admin/syslog-ng:spoof-source - Enable support for spoofed source addresses
app-admin/sysstat:isag - Install isag, the Interactive System Activity Graph tool
app-admin/systemrescuecd-x86:isohybrid - Pass downloaded images through isohybrid in order to make it possible to copy them directly to USB media and boot (requires sys-boot/syslinux at build time).
app-admin/testdisk:ewf - Include ewf library
app-admin/testdisk:ntfs - Include the ability to read NTFS filesystems
app-admin/testdisk:reiserfs - Include reiserfs reading ability
app-admin/tripwire:ssl - Adds support for Secure Socket Layer connections
app-admin/tripwire:static - Builds the package statically
app-admin/tripwire:tools - Installs app-admin/mktwpol, providing scripts for the installation/setup of tripwire, including generating the tripwire policy file and maintenance of the tripwire database
app-admin/ulogd:json - Build JSON output plugin to save packets in JSON file format
app-admin/ulogd:nfacct - Build NFACCT input plugin to support traffic accounting via nfnetlink_acct
app-admin/ulogd:nfct - Build NFCT input plugin to support stateful flow-based logging via nfnetlink_conntrack
app-admin/ulogd:nflog - Build NFLOG input plugin to support stateless packet-based logging via nfnetlink_log
app-admin/ulogd:pcap - Build PCAP output plugin to save packets in libpcap file format
app-admin/ulogd:ulog - Build ULOG input plugin to support deprecated packet-based logging via ULOG target
app-admin/webalizer:xtended - Include the 404 extension
app-admin/webapp-config:portage - Propagete python_targets dependencies to sys-apps/portage
app-admin/yaala:storable - Support for persistence of Perl data structures.
app-antivirus/clamav:clamdtop - A Top like tool which shows what clamd is currently scanning amongst other things
app-antivirus/clamav:metadata-analysis-api - Enables collection of file property metadata using ClamAV API for analysis by ClamAV bytecode programs.
app-arch/cabextract:extras - Install experimental extra tools: wince_info and wince_rename for examining and processing Windows CE installation cabinet header files; cabinfo for examining the structure of a cab file.
app-arch/cfv:bittorrent - Enable support for checking .torrent files
app-arch/deltarpm:system-zlib - Use system sys-libs/zlib. Do not enable features of rsync friendly.
app-arch/dpkg:update-alternatives - Install update-alternatives
app-arch/dump:ermt - encrypted rmt support
app-arch/dump:uuid - Enable UUID support
app-arch/engrampa:caja - Enable engrampa to integrate with mate-base/caja by providing entries in its context menu
app-arch/engrampa:gtk3 - Build with GTK+3 instead of GTK+2
app-arch/engrampa:magic - Enable filetype auto-detection via sys-apps/file
app-arch/engrampa:packagekit - Enable support for installing via app-admin/packagekit based on archive type
app-arch/file-roller:nautilus - Enable file-roller to integrate with gnome-base/nautilus by providing entries in its context menu
app-arch/file-roller:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
app-arch/gzip:pic - disable optimized assembly code that is not PIC friendly
app-arch/innoextract:c++0x - Compile innoextract using the C++11 standard.
app-arch/innoextract:debug - Enable debug logging and the --debug command-line option.
app-arch/innoextract:lzma - Enable support for extracting lzma-compressed installers using app-arch/xz-utils.
app-arch/libarchive:bzip2 - Allow accessing bzip2-compressed archives through libbz2 (which comes with app-arch/bzip2). This only affects libarchive's native support: bsdtar will keep using bunzip2 as a filter if that's not built-in.
app-arch/libarchive:e2fsprogs - Use file flags from sys-fs/e2fsprogs headers instead of virtual/os-headers headers
app-arch/libarchive:lz4 - Enable support for LZ4 compression using app-arch/lz4
app-arch/libarchive:nettle - Use dev-libs/nettle as crypto backend
app-arch/libarchive:zlib - Allow accessing gzip-compressed archives through sys-libs/zlib. This only affects libarchive's native support: bsdtar will keep using gunzip as a filter if that's not built-in. It's also needed for supporting extraction of ZIP files.
app-arch/lz4:valgrind - Enable usage of dev-util/valgrind in tests
app-arch/p7zip:rar - Enable support for non-free rar decoder
app-arch/pbzip2:symlink - Install symlinks which override app-arch/bzip2 implementation
app-arch/pigz:symlink - Install symlinks which override app-arch/gzip implementation
app-arch/rar:all_sfx - Install all SFX (Self-Extracting) files rather than just the native format (allows creation of Windows EXEs on Linux ELF systems)
app-arch/tar:minimal - just install `tar`
app-arch/unzip:natspec - Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.
app-arch/zip:natspec - Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.
app-backup/amanda:s3 - Support for backing up to the Amazon S3 system
app-backup/amanda:xfs - Support for backing up raw XFS filesystems using xfsdump
app-backup/backup-manager:s3 - Support for backing up to the Amazon S3 system
app-backup/bacula:bacula-clientonly - Disable DB support, and just build a client
app-backup/bacula:bacula-nodir - Disable building of director
app-backup/bacula:bacula-nosd - Disable building of storage daemon
app-backup/bacula:logwatch - Install support files for logwatch
app-backup/bareos:cephfs - Enable cephfs storage backend
app-backup/bareos:clientonly - Only install file-daemon (client)
app-backup/bareos:director - Install director
app-backup/bareos:fastlz - Enable support vor lz4, lz4hc and lzfast using dev-libs/bareos-fastlzlib
app-backup/bareos:glusterfs - Enable glusterfs storage backend
app-backup/bareos:gnutls - When ssl is enabled, use GnuTLS instead of OpenSSL
app-backup/bareos:jansson - JSON API support using JANSSON for director
app-backup/bareos:lmdb - enable build of LMDB support for faster accurate backup
app-backup/bareos:logwatch - Install support files for logwatch
app-backup/bareos:ndmp - Enable support for NDMP (Network Data Management Protocol)
app-backup/bareos:rados - Enable rados storage backend
app-backup/bareos:rados-striper - Enable use of rados-striper
app-backup/bareos:scsi-crypto - Enable low level SCSI crypto support
app-backup/bareos:sql-pooling - Enable SQL pooling support
app-backup/bareos:storage-daemon - Install storage daemon (bareos-sd)
app-backup/borgbackup:fuse - Mount archive as a FUSE filesystem.
app-backup/btrbk:pv - Use sys-apps/pv to enable progress bar functionality
app-backup/bup:web - Support browsing backups via a web interface
app-backup/dar:dar32 - Enables --enable-mode=32 option, which replace infinite by 32 bit integers
app-backup/dar:dar64 - Enables --enable-mode=64 option, which replace infinite by 64 bit integers
app-backup/dar:gcrypt - Enables strong encryption support
app-backup/dar:gpg - Enables usage of asymetric crypto algorithms
app-backup/deja-dup:nautilus - Build gnome-base/nautilus extension
app-backup/duplicity:s3 - Support for backing up to the Amazon S3 system
app-backup/holland-backup-mysql-meta:lvm - Install Holland LVM Plugin
app-backup/holland-backup-mysql-meta:mysqldump - Install Holland mysqldump Plugin
app-backup/holland-backup-mysql-meta:mysqlhotcopy - Install Holland mysqlhotcopy Plugin
app-backup/rear:udev - Have ReaR start backup when attaching your USB drive.
app-backup/snapper:btrfs - Include Btrfs support sys-fs/btrfs-progs
app-backup/snapper:ext4 - Include Ext4 support sys-fs/e2fsprogs
app-backup/snapper:lvm - Enable LVM thinprovisioned snapshots support sys-fs/lvm2
app-backup/snapper:xattr - Add support for getting and setting POSIX extended attributes, through sys-apps/attr.
app-backup/tsm:tsm_cit - IBM Tivoli Common Inventory Technology
app-backup/tsm:tsm_hw - Difference snapshot support for NetApp and N-Series file servers
app-backup/zbackup:tartool - Install tartool utility
app-benchmarks/filebench:auto-completion - Enable command-line autocompletion using dev-libs/libtecla.
app-benchmarks/httperf:idleconn - Build with the idleconn program
app-benchmarks/jmeter:beanshell - Enable BeanShell scripting support
app-benchmarks/ramspeed:pic - Force shared libraries to be built as PIC (this is slower)
app-benchmarks/sysbench:aio - Enable libaio support
app-cdr/brasero:libburn - Enable dev-libs/libburn backend
app-cdr/brasero:nautilus - Build the gnome-base/nautilus extension
app-cdr/brasero:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
app-cdr/brasero:playlist - Enable support for playlists through dev-libs/totem-pl-parser
app-cdr/brasero:tracker - Enable audio playlist search using the app-misc/tracker indexer
app-cdr/cdemu:cdemu-daemon - Pull app-cdr/cdemu-daemon dependency, useful in chroot environment (bug #315491). Do not disable until you know what you are doing.
app-cdr/cdrdao:gcdmaster - Enable building of gcdmaster application
app-cdr/cuetools:extras - Install additional script that tag files based on cue/toc file information
app-cdr/dvdisaster:debug - Enable memory debugging.
app-cdr/gaffitter:scripts - Install additional gaffitter scripts for external programs
app-cdr/mirage2iso:pinentry - Support app-crypt/pinentry password input backend.
app-crypt/aespipe:asm - Enable assembly modules
app-crypt/aespipe:cpu_flags_x86_padlock - Use VIA padlock instructions, detected at run time, code still works on non-padlock processors
app-crypt/ccid:kobil-midentity - Build and install Kobil_mIDentity_switch tool
app-crypt/ccid:twinserial - Enable twinserial reader
app-crypt/codecrypt:cryptopp - Build algorithms that need Crypto++ support dev-libs/crypto++
app-crypt/eid-mw:dialogs - Enable "askaccess" dialog box, by using x11-libs/gtk+
app-crypt/eid-mw:gtk - All dialogs are available, by using x11-libs/gtk+
app-crypt/eid-mw:p11-kit - Support for app-crypt/p11-kit.
app-crypt/eid-mw:xpi - Build and install an extension for Mozilla browsers.
app-crypt/ekeyd:minimal - Only install the ekey-egd-linux service rather than the full ekeyd package.
app-crypt/ekeyd:munin - Install a plugin for net-analyzer/munin to graph statistical data from ekeyd.
app-crypt/ekeyd:usb - Build the libusb-based userland daemon for accessing the EntropyKey (alternative to the CDC USB driver). It is suggested to use this option by default, as the CDC driver in the kernel often seems to be fragile (or the gadget implementation on the EntropyKey is too buggy), and can cause various problems.
app-crypt/gnupg:mta - Build mta support using virtual/mta.
app-crypt/gnupg:smartcard - Build scdaemon software. Enables usage of OpenPGP cards. For other type of smartcards, try app-crypt/gnupg-pkcs11-scd. Bring in dev-libs/libusb as a dependency; enable scdaemon.
app-crypt/gnupg:tofu - Enable support for Trust of First use trust model; requires dev-db/sqlite.
app-crypt/gnupg:tools - Install extra tools (including gpgsplit and gpg-zip).
app-crypt/gnupg:usb - Build direct CCID access for scdaemon; requires dev-libs/libusb.
app-crypt/gnupg:wks-server - Install the wks-server
app-crypt/gpgme:common-lisp - Install common-lisp files
app-crypt/heimdal:hdb-ldap - Adds support for LDAP as a database backend
app-crypt/heimdal:otp - Adds support for one-time passwords
app-crypt/heimdal:pkinit - Adds support for PKINIT for the initial ticket
app-crypt/hmaccalc:fips - Enable NSS FIPS mode and support only the FIPS-compliant functions
app-crypt/johntheripper:cuda - Use nvidia cuda toolkit for speeding up cracking on capable devices
app-crypt/johntheripper:mozilla - Support mozilla password cracking
app-crypt/johntheripper:opencl - Enable opencl support for speeding up cracking on capable devices
app-crypt/kstart:afs - Enables afs support which means you can acquire an afs token and set PAGs. It's recommended to set this USE if you need authenticated access to an AFS cell for your daemon/app.
app-crypt/libu2f-host:systemd - Use user ACLs rather than plugdev group to give user access to the HIDRAW device.
app-crypt/mit-krb5:doc - Creates and installs the API and implementation documentation. This is only useful if you want to develop software which depends on kerberos.
app-crypt/mit-krb5:keyutils - Enable for the keyring ccache using keyutils.
app-crypt/mit-krb5:openldap - Enable support for ldap as a database backend.
app-crypt/mit-krb5:pkinit - Enable pkinit support for the initial ticket.
app-crypt/ophcrack:tables - Require the additional tables used to carry out cracking (app-crypt/ophcrack-tables)
app-crypt/ophcrack-tables:vistafree - Installs the free Vista ophcrack tables
app-crypt/ophcrack-tables:xpfast - Installs the fast XP ophcrack tables
app-crypt/ophcrack-tables:xpsmall - Installs the small free XP ophcrack tables
app-crypt/p11-kit:asn1 - Enable ASN.1 certificate support
app-crypt/p11-kit:trust - Build the trust policy module
app-crypt/qca:botan - Enable botan plugin
app-crypt/qca:gcrypt - Enable gcrypt plugin
app-crypt/qca:gpg - Enable GnuPG plugin
app-crypt/qca:logger - Enable logger plugin
app-crypt/qca:nss - Enable NSS plugin
app-crypt/qca:pkcs11 - Enable PKCS#11 plugin
app-crypt/qca:sasl - Enable SASL plugin
app-crypt/qca:softstore - Enable softstore plugin
app-crypt/rhash:openssl - Add support for hashes from dev-libs/openssl
app-crypt/seahorse:ldap - Enable seahorse to manipulate GPG keys on a LDAP server.
app-crypt/tpm-tools:pkcs11 - Build Token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.
app-crypt/veracrypt:asm - Enable assembly for optimization
app-crypt/zuluCrypt:gnome - Enable support for the freedesktop.org Secret Service API via app-crypt/libsecret
app-crypt/zuluCrypt:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
app-crypt/zuluCrypt:udev - Whether udev will be consulted when deciding if a volume is system or not
app-dicts/aspell-be:classic - Support classic spelling by default
app-dicts/gwaei:hunspell - Enable app-text/hunspell spellchecking and morphological analysis
app-dicts/gwaei:mecab - Enable app-text/mecab support
app-dicts/myspell-pt:preao - Use the pre ortographic agreement version of the dictionary
app-doc/clsync-docs:api - Install doxygen generated API docs.
app-doc/csound-manual:html - Install HTML documentation
app-doc/doxygen:clang - support for sys-devel/clang assisted parsing
app-doc/doxygen:dot - allow to create dot graphs using media-gfx/graphviz
app-doc/doxygen:doxysearch - build doxyindexer and doxysearch.cgi
app-doc/kicad-doc:html - Generate documentation in HTML format
app-doc/kicad-doc:pdf - Generate documentation in PDF format
app-doc/linuxfromscratch:htmlsingle - Install all-on-one-page HTML version.
app-doc/pms:binary - Download pre-built files instead of building from sources
app-doc/pms:html - Generate PMS as .html as well
app-doc/pms:twoside - Enable two-sided layout suitable for printing
app-doc/root-docs:api - Generate html API documentation
app-doc/root-docs:http - Build HttpServer documentation
app-doc/root-docs:math - Provide all math related documentation
app-doc/root-docs:metric - Default to A4 paper size and metric measurement. Letter will be used otherwise
app-doc/tldp-howto:html - Install multi-chapter HTML docs
app-doc/tldp-howto:htmlsingle - Install all-on-one-page HTML docs
app-doc/tldp-howto:pdf - Install pdf docs
app-doc/tldp-howto:text - Install plain-text docs
app-editors/atom-bin:system-node - Use node.js system implementation instead of the built-in one.
app-editors/bluefish:gtk2 - Enable GTK2 instead of GTK3 even if GTK3 is available
app-editors/bluefish:gtk3 - Enable GTK3 interface (default)
app-editors/bluefish:gucharmap - Enable gucharmap dictionary plugin
app-editors/bluefish:python - Enable Python integration for zen-coding plugin
app-editors/bluefish:spell - Enable spell checking capabilities via enchant library
app-editors/emacs:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
app-editors/emacs:dynamic-loading - Enable loading of dynamic libraries at runtime
app-editors/emacs:games - Support shared score files for games
app-editors/emacs:gconf - Use gnome-base/gconf to read the system font name
app-editors/emacs:gfile - Use gfile (dev-libs/glib) for file notification
app-editors/emacs:gsettings - Use gsettings (dev-libs/glib) to read the system font name
app-editors/emacs:gtk3 - Prefer version 3 of the GIMP Toolkit to version 2 (x11-libs/gtk+)
app-editors/emacs:gzip-el - Compress bundled Emacs Lisp source
app-editors/emacs:hesiod - Enable support for net-dns/hesiod
app-editors/emacs:imagemagick - Use media-gfx/imagemagick for image processing
app-editors/emacs:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations
app-editors/emacs:pax_kernel - Enable building under a PaX enabled kernel
app-editors/emacs:source - Install C source files and make them available for find-function
app-editors/emacs:toolkit-scroll-bars - Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars
app-editors/emacs:wide-int - Prefer wide Emacs integers (typically 62-bit). This option has an effect only on architectures where "long" and "long long" types have different size.
app-editors/emacs:xwidgets - Enable use of GTK widgets in Emacs buffers (requires GTK3)
app-editors/emacs-vcs:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
app-editors/emacs-vcs:dynamic-loading - Enable loading of dynamic libraries at runtime
app-editors/emacs-vcs:games - Support shared score files for games
app-editors/emacs-vcs:gconf - Use gnome-base/gconf to read the system font name
app-editors/emacs-vcs:gfile - Use gfile (dev-libs/glib) for file notification
app-editors/emacs-vcs:gsettings - Use gsettings (dev-libs/glib) to read the system font name
app-editors/emacs-vcs:gtk3 - Prefer version 3 of the GIMP Toolkit to version 2 (x11-libs/gtk+)
app-editors/emacs-vcs:gzip-el - Compress bundled Emacs Lisp source
app-editors/emacs-vcs:hesiod - Enable support for net-dns/hesiod
app-editors/emacs-vcs:imagemagick - Use media-gfx/imagemagick for image processing
app-editors/emacs-vcs:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations
app-editors/emacs-vcs:mailutils - Retrieve e-mail using net-mail/mailutils instead of the internal movemail substitute
app-editors/emacs-vcs:pax_kernel - Enable building under a PaX enabled kernel
app-editors/emacs-vcs:source - Install C source files and make them available for find-function
app-editors/emacs-vcs:threads - Add elisp threading support
app-editors/emacs-vcs:toolkit-scroll-bars - Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars
app-editors/emacs-vcs:wide-int - Prefer wide Emacs integers (typically 62-bit). This option has an effect only on architectures where "long" and "long long" types have different size.
app-editors/emacs-vcs:xwidgets - Enable use of GTK widgets in Emacs buffers (requires GTK3)
app-editors/fe:sendmail - Send mail after editor abend
app-editors/gedit-plugins:charmap - Insert special characters just by clicking on them
app-editors/gedit-plugins:git - Shows document changes related to git's HEAD
app-editors/gedit-plugins:terminal - Embed a terminal in the bottom pane
app-editors/gedit-plugins:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
app-editors/gvim:gtk3 - Enable GTK+3 interface
app-editors/gvim:luajit - Use dev-lang/luajit instead of dev-lang/lua
app-editors/gvim:netbeans - Include netbeans external editor integration support
app-editors/gvim:racket - Enable support for Scheme using dev-scheme/racket
app-editors/jasspa-microemacs:nanoemacs - Build NanoEmacs instead of MicroEmacs
app-editors/joe:xterm - Enable full xterm clipboard support
app-editors/latexila:latexmk - Install dev-tex/latexmk (used by default for the build tools)
app-editors/latexila:rubber - Install dev-tex/rubber (can be used for the build tools)
app-editors/leafpad:emacs - Enable Emacs key theme
app-editors/mousepad:gtk3 - Use GTK+3 instead of GTK+2
app-editors/nano:debug - Enable debug messages and assert warnings. Note that these will all be sent straight to stderr rather than some logging facility.
app-editors/nano:justify - Enable justify/unjustify functions for text formatting.
app-editors/nano:magic - Add magic file support (sys-apps/file) to automatically detect appropriate syntax highlighting
app-editors/nano:minimal - Disable all fancy features, including ones that otherwise have a dedicated USE flag (such as spelling).
app-editors/ne:tinfo - Link against libtinfo from sys-libs/ncurses
app-editors/neovim:clipboard - Enable clipboard support through a provider
app-editors/neovim:jemalloc - Use dev-libs/jemalloc for allocations
app-editors/neovim:luajit - Use dev-lang/luajit instead of dev-lang/lua
app-editors/neovim:nvimpager - Install nvimpager symlink to less.sh macro
app-editors/neovim:tui - Build the neovim unix tui
app-editors/pluma:gtk3 - Build with GTK+3 instead of GTK+2
app-editors/tea:aspell - Enable spellchecking using app-text/aspell
app-editors/tea:hunspell - Enable spellchecking using app-text/hunspell
app-editors/vim:X - Link console vim against X11 libraries to enable title and clipboard features in xterm
app-editors/vim:luajit - Use dev-lang/luajit instead of dev-lang/lua
app-editors/vim:racket - Enable support for Scheme using dev-lang/racket
app-editors/vim:vim-pager - Install vimpager and vimmanpager links
app-editors/vis:tre - more memory efficient regex search using dev-libs/tre
app-editors/xemacs:athena - Chooses the MIT Athena widget set
app-editors/xemacs:dnd - Enables support for the x11-libs/dnd drag-n-drop library
app-editors/xemacs:eolconv - Support detection and translation of newline conventions
app-editors/xemacs:pop - Support POP for mail retrieval
app-editors/xemacs:xim - Enable X11 XiM input method
app-editors/zile:valgrind - Enable usage of dev-util/valgrind in tests
app-emacs/anything:extensions - Install optional extensions
app-emacs/auctex:preview-latex - Use bundled preview-latex
app-emacs/bbdb:tex - Install plain TeX support files
app-emacs/bbdb:vm - Add support for app-emacs/vm
app-emacs/calfw:howm - Add support for the app-emacs/howm note-taking tool
app-emacs/company-mode:ropemacs - Install backend for dev-python/ropemacs
app-emacs/emacs-common-gentoo:games - Support shared score files for games
app-emacs/emhacks:jde - Enable support for Java Development Environment
app-emacs/magit:contrib - Install user-contributed files
app-emacs/org-mode:contrib - Install user-contributed files
app-emacs/org-mode:odt-schema - Install non-free schema files for OpenDocument Text exporter
app-emacs/remember:bbdb - Include support for app-emacs/bbdb
app-emacs/remember:planner - Include support for app-emacs/planner
app-emacs/slime:xref - Install xref.lisp cross-referencing tool
app-emacs/vm:bbdb - Include support for app-emacs/bbdb
app-emacs/wanderlust:bbdb - Include support for app-emacs/bbdb
app-emacs/wikipedia-mode:outline-magic - Enable support for outline-mode extensions (app-emacs/outline-magic)
app-emulation/bochs:3dnow - Enable support for emulating 3DNow! instructions (incomplete)
app-emulation/bochs:avx - Enable support for emulating Advanced Vector Extensions (AVX)
app-emulation/bochs:debugger - Enable debugger (slows down emulation)
app-emulation/bochs:gdb - Enable support for the remote GDB stub
app-emulation/bochs:x86-64 - Enable support for emulation of 64-bit CPUs
app-emulation/crossover-bin:capi - Enable ISDN support via CAPI
app-emulation/docker:apparmor - Enable AppArmor support.
app-emulation/docker:aufs - Enables dependencies for the "aufs" graph driver, including necessary kernel flags.
app-emulation/docker:btrfs - Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.
app-emulation/docker:container-init - Makes the a staticly-linked init system tini available inside a container.
app-emulation/docker:device-mapper - Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags.
app-emulation/docker:overlay - Enables dependencies for the "overlay" graph driver, including necessary kernel flags.
app-emulation/docker:pkcs11 - Enables pkcs-11 support.
app-emulation/docker-runc:ambient - Enable support for ambient capability
app-emulation/docker-runc:apparmor - Enable AppArmor support
app-emulation/dosemu:fluidsynth - use media-sound/fluidsynth for MIDI emulation
app-emulation/e-uae:capslib - Add CAPS library support
app-emulation/e-uae:sdl-sound - Use media-libs/sdl-sound for audio output
app-emulation/free42:alsa - Adds support for Advanced Linux Sound Architecture
app-emulation/fuse-utils:gcrypt - Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.
app-emulation/ganeti:drbd - Enable DRBD support
app-emulation/ganeti:experimental - Enable experimental patches. Warning! This will break RPC within major versions if the patches applied differ!
app-emulation/ganeti:haskell-daemons - Build haskell daemons instead of python
app-emulation/ganeti:htools - Enable htools support
app-emulation/ganeti:kvm - Enable KVM support
app-emulation/ganeti:lxc - Enable Linux Countainers support
app-emulation/ganeti:monitoring - Enable the ganeti monitoring daemon
app-emulation/ganeti:multiple-users - Enable support for running VMs as different users
app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/ganeti:restricted-commands - Enable restricted commands in the node daemon
app-emulation/ganeti:xen - Enable Xen support
app-emulation/hyperd:libvirt - Enable support for KVM via libvirt
app-emulation/hyperd:xen - Enable support for the Xen Hypervisor
app-emulation/libguestfs:erlang - Build Erlang bindings
app-emulation/libguestfs:fuse - Enable image mount support via fuse
app-emulation/libguestfs:inspect-icons - Use media-gfx/icoutilsfor acces icon file in image and inspect it
app-emulation/libguestfs:systemtap - Use dev-util/systemtap to inspect VM via "probes" way
app-emulation/libspectrum:gcrypt - Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.
app-emulation/libvirt:apparmor - Enable AppArmor support
app-emulation/libvirt:firewalld - DBus interface to iptables/ebtables allowing for better runtime management of your firewall.
app-emulation/libvirt:fuse - Allow LXC to use sys-fs/fuse for mount points
app-emulation/libvirt:glusterfs - Enable GlusterFS support via sys-cluster/glusterfs
app-emulation/libvirt:iscsi - Allow using an iSCSI remote storage server as pool for disk image storage
app-emulation/libvirt:libssh - Use net-libs/libssh to communicate with remote libvirtd hosts, for example: qemu+libssh://server/system
app-emulation/libvirt:libvirtd - Builds the libvirtd daemon as well as the client utilities instead of just the client utilities
app-emulation/libvirt:lvm - Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage
app-emulation/libvirt:lxc - Support management of Linux Containers virtualisation (app-emulation/lxc)
app-emulation/libvirt:macvtap - Support for MAC-based TAP (macvlan/macvtap). For networking instead of the normal TUN/TAP. It has its advantages and disadvantages. macvtap support requires very new kernels and is currently evolving. Support for this is experimental at best.
app-emulation/libvirt:nfs - Allow using Network File System mounts as pool for disk image storage
app-emulation/libvirt:numa - Use NUMA for memory segmenting via sys-process/numactl and sys-process/numad
app-emulation/libvirt:openvz - Support management of OpenVZ virtualisation (see sys-kernel/openvz-sources)
app-emulation/libvirt:parted - Allow using real disk partitions as pool for disk image storage, using sys-block/parted to create, resize and delete them.
app-emulation/libvirt:pcap - Support auto learning IP addreses for routing
app-emulation/libvirt:phyp - Support IBM HMC / IVM hypervisor via PHYP protocol
app-emulation/libvirt:qemu - Support management of QEMU virtualisation (app-emulation/qemu)
app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/libvirt:uml - Support management of User Mode Linux virtualisation
app-emulation/libvirt:vepa - Virtual Ethernet Port Aggregator (VEPA) / 802.1Qbg support. Relies on macvtap support.
app-emulation/libvirt:virt-network - Enable virtual networking (NAT) support for guests. Includes all the dependencies for NATed network mode. Effectively any network setup that relies on libvirt to setup and configure network interfaces on your host. This can include bridged and routed networks ONLY if you are allowing libvirt to create and manage the underlying devices for you. In some cases this requires enabling the 'netcf' USE flag (currently unavailable).
app-emulation/libvirt:virtualbox - Support management of VirtualBox virtualisation (one of app-emulation/virtualbox or app-emulation/virtualbox-bin)
app-emulation/libvirt:wireshark-plugins - Build the net-analyzer/wireshark plugin for the Libvirt RPC protocol
app-emulation/libvirt:xen - Support management of Xen virtualisation (app-emulation/xen)
app-emulation/libvirt:zfs - Enable ZFS backend storage sys-fs/zfs
app-emulation/lxc:cgmanager - Enable support for cgroup management using app-admin/cgmanager
app-emulation/lxd:daemon - Build the system daemon, not just the client tool
app-emulation/open-vm-tools:doc - Generate API documentation
app-emulation/open-vm-tools:grabbitmqproxy - Enable grabbitmqproxy
app-emulation/open-vm-tools:pic - Force shared libraries to be built as PIC
app-emulation/open-vm-tools:vgauth - Enable vgauth
app-emulation/playonlinux:winbind - Enables support for the winbind auth daemon
app-emulation/q4wine:ico - Enable ico support via media-gfx/icoutils
app-emulation/q4wine:iso - Support unprivileged mounting of ISO9660 images via sys-fs/fuseiso
app-emulation/q4wine:wineappdb - Enable Wine AppDB browser support
app-emulation/qemu:accessibility - Adds support for braille displays using brltty
app-emulation/qemu:aio - Enables support for Linux's Async IO
app-emulation/qemu:alsa - Enable alsa output for sound emulation
app-emulation/qemu:curl - Support ISOs / -cdrom directives vis HTTP or HTTPS.
app-emulation/qemu:fdt - Enables firmware device tree support
app-emulation/qemu:glusterfs - Enables GlusterFS cluster fileystem via sys-cluster/glusterfs
app-emulation/qemu:gnutls - Enable TLS support for the VNC console server. For 1.4 and newer this also enables WebSocket support. For 2.0 through 2.3 also enables disk quorum support.
app-emulation/qemu:gtk2 - Use gtk-2 instead of gtk-3
app-emulation/qemu:iscsi - Enable direct iSCSI support via net-libs/libiscsi instead of indirectly via the Linux block layer that sys-block/open-iscsi does.
app-emulation/qemu:jpeg - Enable jpeg image support for the VNC console server
app-emulation/qemu:ncurses - Enable the ncurses-based console
app-emulation/qemu:nfs - Enable NFS support
app-emulation/qemu:numa - Enable NUMA support
app-emulation/qemu:pin-upstream-blobs - Pin the versions of BIOS firmware to the version included in the upstream release. This is needed to sanely support migration/suspend/resume/snapshotting/etc... of instances. When the blobs are different, random corruption/bugs/crashes/etc... may be observed.
app-emulation/qemu:png - Enable png image support for the VNC console server
app-emulation/qemu:pulseaudio - Enable pulseaudio output for sound emulation
app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
app-emulation/qemu:sdl - Enable the SDL-based console
app-emulation/qemu:sdl2 - Use libsdl2 instead of libsdl
app-emulation/qemu:snappy - Enable support for snappy compression
app-emulation/qemu:spice - Enable Spice protocol support via app-emulation/spice
app-emulation/qemu:ssh - Enable SSH based block device support via net-libs/libssh2
app-emulation/qemu:static - Build the User and Software MMU (system) targets as well as tools as static binaries
app-emulation/qemu:static-user - Build the User targets as static binaries
app-emulation/qemu:systemtap - Enable SystemTAP/DTrace tracing
app-emulation/qemu:tci - Enable the TCG Interpreter which can speed up or slowdown workloads depending on the host and guest CPUs being emulated. In the future it will be a runtime option but for now its compile time.
app-emulation/qemu:usb - Enable USB passthrough via dev-libs/libusb
app-emulation/qemu:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
app-emulation/qemu:vde - Enable VDE-based networking
app-emulation/qemu:vhost-net - Enable accelerated networking using vhost-net, see http://www.linux-kvm.org/page/VhostNet
app-emulation/qemu:virgl - Enable experimental Virgil 3d (virtual software GPU)
app-emulation/qemu:virtfs - Enable VirtFS via virtio-9p-pci / fsdev. See http://wiki.qemu.org/Documentation/9psetup
app-emulation/qemu:vte - Enable terminal support (x11-libs/vte) in the GTK+ interface
app-emulation/qemu:xattr - Add support for getting and setting POSIX extended attributes, through sys-apps/attr. Requisite for the virtfs backend.
app-emulation/qemu:xen - Enables support for Xen backends
app-emulation/qemu:xfs - Support xfsctl() notification and syncing for XFS backed virtual disks.
app-emulation/qt-virt-manager:smartcard - Enable smartcard remoting using app-emulation/libcacard
app-emulation/rkt:actool - Install the actool for ACI manipulation
app-emulation/rkt:rkt_stage1_coreos - Download and use a prebuilt stage1.aci from CoreOS
app-emulation/rkt:rkt_stage1_fly - Build stage1-fly.aci
app-emulation/rkt:rkt_stage1_host - Assemble stage1.aci from host binaries
app-emulation/rkt:rkt_stage1_kvm - This flag has been replaced by the rkt_stage1_kvm_* flags
app-emulation/rkt:rkt_stage1_kvm_lkvm - Build stage1-kvm-lkvm.aci
app-emulation/rkt:rkt_stage1_kvm_qemu - Build stage1-kvm-qemu.aci
app-emulation/rkt:rkt_stage1_src - Build the stage1.aci from source
app-emulation/runc:ambient - Enable support for ambient capabilities set (Requires Linux kernel 4.3 or later).
app-emulation/runc:apparmor - Enable AppArmor support.
app-emulation/runv:libvirt - Enable support for KVM via libvirt
app-emulation/runv:xen - Enable support for the Xen Hypervisor
app-emulation/spice:lz4 - Enable support for LZ4 compression using app-arch/lz4
app-emulation/spice:smartcard - Enable smartcard remoting using app-emulation/libcacard
app-emulation/spice-vdagent:consolekit - Use sys-auth/consolekit to determine the master vdagentd in case of multiple running vdagentds (highly recommended)
app-emulation/uae:scsi - Enable the uaescsi.device
app-emulation/vagrant:virtualbox - Use VirtualBox provider.
app-emulation/vice:ethernet - Enable ethernet emulation
app-emulation/vice:fullscreen - Enable the ability to run fullscreen
app-emulation/vice:sdlsound - Use media-libs/libsdl for sound support
app-emulation/vice:vte - Enable support for x11-libs/vte in the GTK+ interface
app-emulation/virt-manager:policykit - Enables sys-auth/polkit authentication support, required when using app-emulation/libvirt with PolicyKit authentication
app-emulation/virt-manager:sasl - Depend on the proper libraries needed to connect to SASL-enabled libvirtd instances (e.g. Kerberos-protected instances).
app-emulation/virt-viewer:spice - Support connecting to SPICE-enabled virtual machines.
app-emulation/virt-viewer:vnc - Support connecting to VNC-enabled virtual machines.
app-emulation/virt-what:dmi - Use sys-apps/dmidecode to read firmware data
app-emulation/virtualbox:headless - Build without any graphic frontend
app-emulation/virtualbox:lvm - Build VBoxVolInfo that needs devicemapper from sys-fs/lvm2.
app-emulation/virtualbox:pax_kernel - Apply patch needed for pax enabled kernels.
app-emulation/virtualbox:sdk - Enable building of SDK
app-emulation/virtualbox:udev - Controls installation of special USB udev rules.
app-emulation/virtualbox:vboxwebsrv - Build and install the VirtualBox webservice
app-emulation/virtualbox-bin:additions - Install Guest System Tools ISO
app-emulation/virtualbox-bin:chm - Install kchmviewer binary to enable online help (in MS CHM format)
app-emulation/virtualbox-bin:headless - Install without any graphic frontend
app-emulation/virtualbox-bin:rdesktop-vrdp - Install the rdesktop client integration
app-emulation/virtualbox-bin:sdk - Enable building of SDK
app-emulation/virtualbox-bin:vboxwebsrv - Install the VirtualBox webservice
app-emulation/virtualbox-modules:pax_kernel - Apply patch needed for pax enabled kernels
app-emulation/vmware-modules:pax_kernel - Apply patch needed for pax enabled kernels
app-emulation/vmware-modules:vmci - Build the Virtual Machine Communication Interface module; disable this if you want to use the module from the mainline kernel
app-emulation/vmware-modules:vsock - Build the VMware VMCI transport for Virtual Sockets; disable this if you want to use the module from the mainline kernel
app-emulation/vmware-player:bundled-libs - Use precompiled bundled libraries instead of the system installation
app-emulation/vmware-player:ovftool - Install OVF tool for importing and exporting appliance files
app-emulation/vmware-player:vmware-tools - Install VMware Tools images
app-emulation/vmware-workstation:bundled-libs - Use precompiled bundled libraries instead of the system installation
app-emulation/vmware-workstation:ovftool - Install OVF tool.
app-emulation/vmware-workstation:server - Install VMware Workstation Server component.
app-emulation/vmware-workstation:vix - Install VIX. The VIX API allows you to write programs and scripts that automate virtual machine operations, and run programs or manipulate files within guest operating systems.
app-emulation/vmware-workstation:vmware-tools - Install VMware Tools images
app-emulation/vov:gprof - build with profiling support
app-emulation/wine:capi - Enable ISDN support via CAPI
app-emulation/wine:custom-cflags - Bypass strip-flags; use at your own peril
app-emulation/wine:d3d9 - Apply highly experimental patches for Gallium Nine support. This patch may break some applications.
app-emulation/wine:dos - Pull in games-emulation/dosbox to run DOS applications
app-emulation/wine:gecko - Add support for the Gecko engine when using iexplore
app-emulation/wine:gstreamer - Use media-libs/gstreamer to provide DirectShow functionality;
app-emulation/wine:mono - Add support for .NET using Wine's Mono add-on
app-emulation/wine:netapi - Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
app-emulation/wine:opencl - Enable OpenCL support
app-emulation/wine:osmesa - Add support for OpenGL in bitmaps using libOSMesa
app-emulation/wine:pcap - Support packet capture software (e.g. wireshark)
app-emulation/wine:perl - Install helpers written in perl (winedump/winemaker)
app-emulation/wine:pipelight - Apply Wine-Staging patches for Pipelight/Silverlight support
app-emulation/wine:prelink - Run prelink on DLLs during build; For versions before wine-1.7.55 or hardened, do not disable if you do not know what this means as it can break things at runtime
app-emulation/wine:realtime - Pull in sys-auth/rtkit for low-latency pulseaudio support
app-emulation/wine:run-exes - Use Wine to open and run .EXE and .MSI files
app-emulation/wine:s3tc - Pull in media-libs/libtxc_dxtn for DXTn texture compression, needed for many games
app-emulation/wine:samba - Add support for NTLM auth. see http://wiki.winehq.org/NtlmAuthSetupGuide and http://wiki.winehq.org/NtlmSigningAndSealing
app-emulation/wine:staging - Apply Wine-Staging patches for advanced feature support that haven't made it into upstream Wine yet
app-emulation/wine:themes - Support GTK+:3 window theming through Wine-Staging
app-emulation/wine:udev - Use virtual/libudev to provide plug and play support
app-emulation/wine-any:capi - Enable ISDN support via CAPI
app-emulation/wine-any:custom-cflags - Bypass strip-flags; use at your own peril
app-emulation/wine-any:d3d9 - Apply highly experimental patches for Gallium Nine support. This patch may break some applications.
app-emulation/wine-any:dos - Pull in games-emulation/dosbox to run DOS applications
app-emulation/wine-any:gecko - Add support for the Gecko engine when using iexplore
app-emulation/wine-any:gstreamer - Use media-libs/gstreamer to provide DirectShow functionality;
app-emulation/wine-any:mono - Add support for .NET using Wine's Mono add-on
app-emulation/wine-any:netapi - Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
app-emulation/wine-any:opencl - Enable OpenCL support
app-emulation/wine-any:osmesa - Add support for OpenGL in bitmaps using libOSMesa
app-emulation/wine-any:pcap - Support packet capture software (e.g. wireshark)
app-emulation/wine-any:perl - Install helpers written in perl (winedump/winemaker)
app-emulation/wine-any:pipelight - Apply Wine-Staging patches for Pipelight/Silverlight support
app-emulation/wine-any:prelink - Run prelink on DLLs during build; For versions before wine-1.7.55 or hardened, do not disable if you do not know what this means as it can break things at runtime
app-emulation/wine-any:realtime - Pull in sys-auth/rtkit for low-latency pulseaudio support
app-emulation/wine-any:run-exes - Use Wine to open and run .EXE and .MSI files
app-emulation/wine-any:s3tc - Pull in media-libs/libtxc_dxtn for DXTn texture compression, needed for many games
app-emulation/wine-any:samba - Add support for NTLM auth. see http://wiki.winehq.org/NtlmAuthSetupGuide and http://wiki.winehq.org/NtlmSigningAndSealing
app-emulation/wine-any:staging - Apply Wine-Staging patches for advanced feature support that haven't made it into upstream Wine yet
app-emulation/wine-any:themes - Support GTK+:3 window theming through Wine-Staging
app-emulation/wine-any:udev - Use virtual/libudev to provide plug and play support
app-emulation/wine-d3d9:capi - Enable ISDN support via CAPI
app-emulation/wine-d3d9:custom-cflags - Bypass strip-flags; use at your own peril
app-emulation/wine-d3d9:d3d9 - Apply highly experimental patches for Gallium Nine support. This patch may break some applications.
app-emulation/wine-d3d9:dos - Pull in games-emulation/dosbox to run DOS applications
app-emulation/wine-d3d9:gecko - Add support for the Gecko engine when using iexplore
app-emulation/wine-d3d9:gstreamer - Use media-libs/gstreamer to provide DirectShow functionality;
app-emulation/wine-d3d9:mono - Add support for .NET using Wine's Mono add-on
app-emulation/wine-d3d9:netapi - Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
app-emulation/wine-d3d9:opencl - Enable OpenCL support
app-emulation/wine-d3d9:osmesa - Add support for OpenGL in bitmaps using libOSMesa
app-emulation/wine-d3d9:pcap - Support packet capture software (e.g. wireshark)
app-emulation/wine-d3d9:perl - Install helpers written in perl (winedump/winemaker)
app-emulation/wine-d3d9:prelink - Run prelink on DLLs during build; For versions before wine-1.7.55 or hardened, do not disable if you do not know what this means as it can break things at runtime
app-emulation/wine-d3d9:realtime - Pull in sys-auth/rtkit for low-latency pulseaudio support
app-emulation/wine-d3d9:run-exes - Use Wine to open and run .EXE and .MSI files
app-emulation/wine-d3d9:samba - Add support for NTLM auth. see http://wiki.winehq.org/NtlmAuthSetupGuide and http://wiki.winehq.org/NtlmSigningAndSealing
app-emulation/wine-d3d9:udev - Use virtual/libudev to provide plug and play support
app-emulation/wine-staging:capi - Enable ISDN support via CAPI
app-emulation/wine-staging:custom-cflags - Bypass strip-flags; use at your own peril
app-emulation/wine-staging:dos - Pull in games-emulation/dosbox to run DOS applications
app-emulation/wine-staging:gecko - Add support for the Gecko engine when using iexplore
app-emulation/wine-staging:gstreamer - Use media-libs/gstreamer to provide DirectShow functionality;
app-emulation/wine-staging:mono - Add support for .NET using Wine's Mono add-on
app-emulation/wine-staging:netapi - Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
app-emulation/wine-staging:opencl - Enable OpenCL support
app-emulation/wine-staging:osmesa - Add support for OpenGL in bitmaps using libOSMesa
app-emulation/wine-staging:pcap - Support packet capture software (e.g. wireshark)
app-emulation/wine-staging:perl - Install helpers written in perl (winedump/winemaker)
app-emulation/wine-staging:pipelight - Apply Wine-Staging patches for Pipelight/Silverlight support
app-emulation/wine-staging:prelink - Run prelink on DLLs during build; For versions before wine-1.7.55 or hardened, do not disable if you do not know what this means as it can break things at runtime
app-emulation/wine-staging:realtime - Pull in sys-auth/rtkit for low-latency pulseaudio support
app-emulation/wine-staging:run-exes - Use Wine to open and run .EXE and .MSI files
app-emulation/wine-staging:s3tc - Pull in media-libs/libtxc_dxtn for DXTn texture compression, needed for many games
app-emulation/wine-staging:samba - Add support for NTLM auth. see http://wiki.winehq.org/NtlmAuthSetupGuide and http://wiki.winehq.org/NtlmSigningAndSealing
app-emulation/wine-staging:staging - Apply Wine-Staging patches for advanced feature support that haven't made it into upstream Wine yet
app-emulation/wine-staging:themes - Support GTK+:3 window theming through Wine-Staging
app-emulation/wine-staging:udev - Use virtual/libudev to provide plug and play support
app-emulation/wine-vanilla:capi - Enable ISDN support via CAPI
app-emulation/wine-vanilla:custom-cflags - Bypass strip-flags; use at your own peril
app-emulation/wine-vanilla:dos - Pull in games-emulation/dosbox to run DOS applications
app-emulation/wine-vanilla:gecko - Add support for the Gecko engine when using iexplore
app-emulation/wine-vanilla:gstreamer - Use media-libs/gstreamer to provide DirectShow functionality;
app-emulation/wine-vanilla:mono - Add support for .NET using Wine's Mono add-on
app-emulation/wine-vanilla:netapi - Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
app-emulation/wine-vanilla:opencl - Enable OpenCL support
app-emulation/wine-vanilla:osmesa - Add support for OpenGL in bitmaps using libOSMesa
app-emulation/wine-vanilla:pcap - Support packet capture software (e.g. wireshark)
app-emulation/wine-vanilla:perl - Install helpers written in perl (winedump/winemaker)
app-emulation/wine-vanilla:prelink - Run prelink on DLLs during build; For versions before wine-1.7.55 or hardened, do not disable if you do not know what this means as it can break things at runtime
app-emulation/wine-vanilla:realtime - Pull in sys-auth/rtkit for low-latency pulseaudio support
app-emulation/wine-vanilla:run-exes - Use Wine to open and run .EXE and .MSI files
app-emulation/wine-vanilla:samba - Add support for NTLM auth. see http://wiki.winehq.org/NtlmAuthSetupGuide and http://wiki.winehq.org/NtlmSigningAndSealing
app-emulation/wine-vanilla:udev - Use virtual/libudev to provide plug and play support
app-emulation/winetricks:rar - Pull in app-arch/unrar for extraction of rar-compressed game files
app-emulation/x48:readline - Enables support for libreadline
app-emulation/xe-guest-utilities:xenstore - Use xenstore binaries bundled by Citrix instead of building app-emulation/xen-tools
app-emulation/xen:efi - Adds efi boot support, requires LDFLAG -melf_x86_64 for amd64
app-emulation/xen:flask - Enable the Flask XSM module from NSA
app-emulation/xen-tools:api - Build the C libxenapi bindings
app-emulation/xen-tools:flask - Enable the Flask XSM module from NSA
app-emulation/xen-tools:hvm - Enable support for hardware based virtualization (VT-x,AMD-v)
app-emulation/xen-tools:ocaml - Enable support for the ocaml language
app-emulation/xen-tools:ovmf - Enable support to boot UEFI guest vm, needed by hvm
app-emulation/xen-tools:pam - Enable pam support
app-emulation/xen-tools:pygrub - Install the pygrub boot loader
app-emulation/xen-tools:qemu - Enable IOEMU support via the use of qemu-dm
app-emulation/xen-tools:qemu-traditional - Build the old qemu traditional device model (useful only if you cannot change to the new device model e.g. Windows VMs)
app-emulation/xen-tools:screen - Enable support for running domain U console in an app-misc/screen session
app-emulation/xen-tools:system-qemu - Using app-emulation/qemu instead of the bundled one
app-emulation/xen-tools:system-seabios - Using sys-firmware/seabios instead of the bundled one
app-emulation/xtrs:ls-dos - Install LS-DOS disk images for Model 4P
app-eselect/eselect-php:fpm - Enable the FastCGI Process Manager SAPI
app-forensics/afflib:fuse - Enable extra fuse thingies
app-forensics/afflib:qemu - Enable qemu stuff
app-forensics/afflib:s3 - Enable support for Amazon S3
app-forensics/aide:e2fs - Enable support for checking file attributes on ext2/ext3/ext4 filesystems
app-forensics/aide:prelink - Bypass prelinking when calculating checksums
app-forensics/chkrootkit:cron - Install cron script for weekly rootkit scans
app-forensics/libewf:bfio - Enables libbfio for chaining file in file handling
app-forensics/libewf:ewf - Enables the v1 API
app-forensics/libewf:fuse - Enable fuse support for ewfmount
app-forensics/libewf:rawio - Enables raw IO handling
app-forensics/libewf:uuid - Enable UUID support in the ewftools
app-forensics/openscap:gconf - Build the gconf independant probes
app-forensics/openscap:nss - Prefer NSS over libgcrypt as the crypto engine
app-forensics/openscap:rpm - Compiles the RPM probes
app-forensics/openscap:sce - Enables Script Check Engine (SCE) support
app-forensics/openscap:sql - Build the sql independant probes
app-forensics/ovaldi:rpm - Enable the RPM probes
app-forensics/quickfuzz:archs - support archive formats
app-forensics/quickfuzz:codes - support cource code formats
app-forensics/quickfuzz:docs - support document formats
app-forensics/quickfuzz:imgs - support image formats
app-forensics/quickfuzz:media - support media formats
app-forensics/quickfuzz:net - support networking formats
app-forensics/quickfuzz:pki - support PKI formats
app-forensics/sleuthkit:aff - Enable extra aff formats
app-forensics/sleuthkit:ewf - Enable libewf support
app-i18n/anthy:canna-2ch - Enable support for app-dicts/canna-2ch
app-i18n/canna:canuum - Build canuum
app-i18n/fcitx:autostart - Enable XDG-compatible autostart of Fcitx
app-i18n/fcitx:enchant - Enable Enchant backend (using app-text/enchant) for spelling hinting
app-i18n/fcitx:gtk2 - Install input method module for GTK+ 2
app-i18n/fcitx:gtk3 - Install input method module for GTK+ 3
app-i18n/fcitx:opencc - Enable OpenCC engine (using app-i18n/opencc) for converter between Simplified Chinese and Traditional Chinese
app-i18n/fcitx:pango - Enable support for x11-libs/pango
app-i18n/fcitx:qt4 - Install input method module for Qt 4
app-i18n/fcitx:table - Install table input methods for Simplified Chinese
app-i18n/fcitx-configtool:gtk3 - Use GTK+3 instead of 2
app-i18n/fcitx-libpinyin:dictmanager - Enable dictionary manager. Requires dev-qt/qtwebkit.
app-i18n/fcitx-unikey:macro-editor - Install macro editor
app-i18n/freewnn:uum - Build uum
app-i18n/ibus:deprecated - install the deprecated ibus python library
app-i18n/ibus:gconf - Enable support for gnome-base/gconf
app-i18n/ibus:gtk3 - Enable support for gtk+3
app-i18n/ibus-anthy:deprecated - Install deprecated pygtk2 library
app-i18n/ibus-handwrite:zinnia - Build with app-i18n/zinnia engine.
app-i18n/ibus-libpinyin:boost - Compile against dev-libs/boost libraries
app-i18n/ibus-libpinyin:opencc - Enable support for app-i18n/opencc
app-i18n/ibus-m17n:gtk2 - Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-i18n/ibus-pinyin:boost - Compile against dev-libs/boost libraries
app-i18n/ibus-unikey:gtk3 - Enable support for gtk+3
app-i18n/im-chooser:gtk2 - Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-i18n/im-chooser:xfce - Enable support for XFCE panel
app-i18n/imsettings:gconf - Enable support for gnome-base/gconf
app-i18n/imsettings:gtk2 - Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-i18n/imsettings:xfconf - Enable support for xfce-base/xfconf
app-i18n/kimera:anthy - Enable support for app-i18n/anthy
app-i18n/mozc:fcitx - Enable support for app-i18n/fcitx
app-i18n/mozc:ibus - Enable support for app-i18n/ibus
app-i18n/mozc:renderer - Enable native candidate window.
app-i18n/pyzy:boost - Enable support for dev-libs/boost
app-i18n/pyzy:doc - Enable support for documents
app-i18n/pyzy:opencc - Use app-i18n/opencc for input
app-i18n/scim:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/scim-anthy:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/scim-anthy:kasumi - Use Anthy dictionary maintenance tool (app-dicts/kasumi)
app-i18n/tomoe:hyperestraier - Enable support for app-text/hyperestraier
app-i18n/translate-shell:tts - Enable text-to-speech support
app-i18n/uim:anthy - Enable support for app-i18n/anthy input method
app-i18n/uim:eb - Enable support for dev-libs/eb
app-i18n/uim:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/uim:skk - Enable support for app-i18n/skk-jisyo
app-laptop/hdapsd:libconfig - Require dev-libs/libconfig to allow the daemon to read a configuration file at startup
app-laptop/ibam:gkrellm - Enable building of app-admin/gkrellm module
app-laptop/laptop-mode-tools:scsi - Adds dependency on sdparm to control non-SATA SCSI drivers
app-laptop/pbbuttonsd:ibam - Enable support for Intelligent Battery Monitoring
app-laptop/pbbuttonsd:macbook - Enable support for the Macbook and Macbook Pro
app-laptop/thinkfan:atasmart - include libatasmart support to get disc temperature
app-laptop/tp_smapi:hdaps - Install a compatible HDAPS module
app-leechcraft/lc-azoth:acetamide - Build Acetamide, the IRC protocol support
app-leechcraft/lc-azoth:adiumstyles - Build support for Adium styles
app-leechcraft/lc-azoth:astrality - Build Astrality, support for protocols provided by Telepathy
app-leechcraft/lc-azoth:autoidler - Build support for automatic status changing according to user idle time
app-leechcraft/lc-azoth:autopaste - Build Autopaste for pasting long texts to pastebins
app-leechcraft/lc-azoth:birthdaynotifier - Build Birthday Notifier for you to not forget about birthdays of your contacts.
app-leechcraft/lc-azoth:chathistory - Build ChatHistory which stories chat history
app-leechcraft/lc-azoth:depester - Build Depester which enables to ignore MUC participants
app-leechcraft/lc-azoth:embedmedia - Build EmbedMedia for embedding flash videos and images directly into chat windows
app-leechcraft/lc-azoth:herbicide - Build Herbicide, a basic antispam plugin
app-leechcraft/lc-azoth:hili - Build HiLi which allows to customize highlight settings in MUCs
app-leechcraft/lc-azoth:isterique - Build Isterique plugin for neutralizing excessive caps lock usage
app-leechcraft/lc-azoth:juick - Build plugin for the Juick.com microblogging service
app-leechcraft/lc-azoth:keeso - Build plugin for changing text into SoMEtHInG lIKe THiS
app-leechcraft/lc-azoth:lastseen - Build plugin for client-side recording of the last online/available time
app-leechcraft/lc-azoth:media - Enable media calls
app-leechcraft/lc-azoth:metacontacts - Build plugin for metacontacts support
app-leechcraft/lc-azoth:murm - Build Murm, the VKontakte messaging support via their native API (instead of XMPP)
app-leechcraft/lc-azoth:nativeemoticons - Build support for native Azoth's emoticons packs
app-leechcraft/lc-azoth:otroid - Build OTRoid, plugin for the Off-the-Record deniable encryption system
app-leechcraft/lc-azoth:sarin - Build Sarin, Tox protocol support module. Please add mva overlay to use net-libs/tox
app-leechcraft/lc-azoth:shx - Build shell command executor plugin
app-leechcraft/lc-azoth:standardstyles - Build support for standard Azoth styles engine
app-leechcraft/lc-azoth:vader - Bulid Vader, the MRIM (Mail.Ru Agent) protocol support plugin
app-leechcraft/lc-azoth:velvetbird - Build support for protocols provided by libpurple
app-leechcraft/lc-azoth:woodpecker - Build Woodpecker, the Twitter client plugin
app-leechcraft/lc-azoth:xtazy - Build Xtazy for publishing currently playing tune
app-leechcraft/lc-blasq:deathnote - Support LiveJournal FotoBilder service
app-leechcraft/lc-blasq:rappor - Support VKontakte service
app-leechcraft/lc-blasq:spegnersi - Support Flickr service
app-leechcraft/lc-blasq:vangog - Support Picasa service
app-leechcraft/lc-blogique:hestia - Allows one to keep a local blog
app-leechcraft/lc-blogique:metida - Support for the LiveJournal blogging platform
app-leechcraft/lc-core:qwt - Support for QML plotting item through x11-libs/qwt
app-leechcraft/lc-gmailnotifier:notify - Pull in a plugin to show notifications from GMail Notiifer
app-leechcraft/lc-gmailnotifier:quark - Pull in a plugin to show GMail Notifier's quark
app-leechcraft/lc-lmp:fradj - Build FrAdj, the equalizer effect module
app-leechcraft/lc-lmp:graffiti - Build media tags editor plugin
app-leechcraft/lc-lmp:guess - Enable tags encoding guessing via the libguess library
app-leechcraft/lc-lmp:mp3tunes - Build plugin for supporting the mp3tunes.com music locker service
app-leechcraft/lc-lmp:mpris - Enable MPRIS support
app-leechcraft/lc-lmp:potorchu - Enable the projectM-based visualization effects module for LMP
app-leechcraft/lc-monocle:fb2 - Enable support for FictionBook format
app-leechcraft/lc-monocle:mobi - Enable support for MOBI format
app-leechcraft/lc-musiczombie:acoustid - Use media-libs/chromaprint for acoustic fingerprinting
app-leechcraft/lc-netstoremanager:dropbox - Build Dropbox storage backend
app-leechcraft/lc-netstoremanager:googledrive - Build Google Drive storage backend
app-leechcraft/lc-poshuku:autosearch - Provide automatic search suggestions for Poshuku.
app-leechcraft/lc-poshuku:cleanweb - Build CleanWeb for ad blocking compatible with Firefox's AdBlock+.
app-leechcraft/lc-poshuku:dcac - Build color inverter module providing a night mode.
app-leechcraft/lc-poshuku:fatape - Build FatApe, GreaseMonkey userscripts support layer.
app-leechcraft/lc-poshuku:filescheme - Build FileScheme for accessing local URLs.
app-leechcraft/lc-poshuku:foc - Build FOC for Flash-on-Click functionality.
app-leechcraft/lc-poshuku:fua - Build FUA for faking user agents for different hosts.
app-leechcraft/lc-poshuku:keywords - Build Keywords for adjusting search shortcuts.
app-leechcraft/lc-poshuku:onlinebookmarks - Build OnlineBookmarks for syncing bookmarks with social bookmarking services like Read It Later.
app-leechcraft/lc-poshuku:qrd - Build module for displaying the QR code of a web page.
app-leechcraft/lc-poshuku:speeddial - Build SpeedDial module.
app-leechcraft/lc-poshuku:webengine - Build WebEngine- (that is, Chromium-)based rendering backend.
app-leechcraft/lc-secman:exposecontents - Build the GUI for viewing the stored data.
app-leechcraft/leechcraft-meta:de - Install components, that allow using Leechcraft as Desktop Environment
app-misc/anki:recording - Enable support for audio recording
app-misc/anki:sound - Enable support for adding sound to cards
app-misc/bijiben:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
app-misc/binwalk:graph - Enable support for generating entropy graphs
app-misc/blink1:mini-tool - Build and install command-line mini-tool blink1-mini-tool (normally used for embedded devices)
app-misc/blink1:server - Build and install REST API server (currently hard-coded to TCP port 8080)
app-misc/blink1:tool - Build and install command-line tool blink1-tool
app-misc/byobu:screen - Use app-misc/screen as the default backend
app-misc/ca-certificates:cacert - Include root certs from CAcert (http://www.cacert.org/) and Software in the Public Interest (http://www.spi-inc.org/)
app-misc/ca-certificates:insecure_certs - Install certs which are known to *not* being trustworthy.
app-misc/ddccontrol:pci - enable direct PCI memory access (the setuid ddcpci util)
app-misc/ddcutil:enable-api-libs - Enables the C/C++ API.
app-misc/ddcutil:usb-monitor - Adds support for monitors attached via USB.
app-misc/ddcutil:user-permissions - Adds a udev rules to allow non-root users in the i2c group to access the /dev/i2c-* devices. If usb-monitor is selected, users will need to be added to the video group to access the USB monitor. Otherwise, only root will be able to use ddcutil.
app-misc/digitemp:ds2490 - Build support for the ds2490 sensor
app-misc/digitemp:ds9097 - Build support for the ds9097 sensor
app-misc/digitemp:ds9097u - Build support for the ds9097u sensor
app-misc/emelfm2:ansi - Add support for ANSI escape sequences
app-misc/emelfm2:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
app-misc/freemind:groovy - Build plugin for scripting via Groovy
app-misc/freemind:latex - Build plugin for inserting mathematical formulas in LaTeX syntax
app-misc/freemind:pdf - Build plugin for exporting mindmaps to SVG and PDF
app-misc/freemind:svg - Build plugin for exporting mindmaps to SVG and PDF
app-misc/gcstar:stats - Enable statistics reporting
app-misc/gcstar:tellico - Enable support for kde-misc/tellico files
app-misc/geneweb:ocamlopt - Enable ocamlopt support (dev-lang/ocaml native code compiler)
app-misc/geoclue:geonames - Install geonames.org provider
app-misc/geoclue:gsmloc - Install GSM location provider
app-misc/geoclue:gtk - Install gtk-based geoclue-test-gui
app-misc/geoclue:hostip - Install hostip.info provder
app-misc/geoclue:manual - Install manual provider
app-misc/geoclue:modemmanager - Enable geolocation through 3G or GPS enabled hardware through net-misc/modemmanager.
app-misc/geoclue:nominatim - Install openstreetmap.org provider
app-misc/geoclue:plazes - Install plazes.com provider
app-misc/geoclue:skyhook - Install skyhookwireless.com provider
app-misc/geoclue:yahoo-geo - Install Yahoo geolocation provider
app-misc/geoclue:zeroconf - Enable retrieval of GPS location from Android devices with https://wiki.gnome.org/Apps/GeoclueShare
app-misc/gourmet:i18n - Enable support for i18n through elib.intl
app-misc/gourmet:ipython - Enable support for the interactive Python console plugin
app-misc/gourmet:pdf - Enable export to PDF
app-misc/gourmet:print - Enable pretty Python printing
app-misc/gourmet:spell - Enable support for the spell check plugin
app-misc/gourmet:web - Enable support for the web import plugin
app-misc/gramps:geo - Enable rendering of geographical data using sci-geosciences/osm-gps-map.
app-misc/gramps:reports - All external software that is needed for graphical reports will be installed
app-misc/graphlcd-base:g15 - Add support for app-misc/g15daemon driver (e.g. Logitech G15 Keybord)
app-misc/irtrans-irserver:mono - Enable mono support
app-misc/jq:oniguruma - Use dev-libs/oniguruma for regular expression support
app-misc/jq:valgrind - Depend on dev-util/vagrind for test suite
app-misc/lcd4linux:mpd - Add support for display of mpd controlled music (media-libs/libmpd)
app-misc/lcdproc:ftdi - Enable support for FTDI connections in some selected LCD_DEVICES (currently hd44780)
app-misc/lcdproc:hid - Enable HID support using libhid
app-misc/lcdproc:irman - Enable support for IRMan (media-libs/libirman)
app-misc/lcdproc:lcd_devices_sdeclcd - Enable support for VLSYS M428 display
app-misc/lcdproc:lcd_devices_vlsys_m428 - Enable support for VLSYS M428 display
app-misc/lcdproc:nfs - Adds support for NFS file system
app-misc/lcdproc:seamless-hbars - Try to avoid gaps in horizontal bars
app-misc/linux-logo:nls - Add Native Language Support (using gettext - GNU locale utilities)
app-misc/lirc:audio - Support using an audio device connected to an IR receiver
app-misc/lirc:devinput - Support the devinput input device
app-misc/lirc:ftdi - Support FTDI devices
app-misc/lirc:gtk - Include GTK support which enables the use of lirc-setup
app-misc/lirc:hardware-carrier - The transmitter device generates its clock signal in hardware
app-misc/lirc:iguanair - Support iguanaIR devices
app-misc/lirc:inputlirc - Add a dependency on app-misc/inputlircd
app-misc/lirc:irman - Add a dependency on media-libs/libirman
app-misc/lirc:transmitter - Add transmitter support to some lirc-drivers (e.g. serial)
app-misc/lirc:uinput - Enable support for uinput
app-misc/mc:edit - Compile and install the mcedit application
app-misc/mc:mclib - Compile and install the libmc.so shared library
app-misc/mc:sftp - Add support for sftp (uses net-libs/libssh2 for it).
app-misc/mc:slang - Use sys-libs/slang instead of sys-libs/ncurses.
app-misc/mc:xdg - Toggles mc's config dir location. Enable for $XDG_CONFIG_HOME/mc, disable for $HOME/.mc
app-misc/mosquitto:bridge - Enable bridge support in the MQTT broker.
app-misc/mosquitto:persistence - Store messages and subscriptions to a file.
app-misc/mosquitto:srv - Include SRV lookup support.
app-misc/mosquitto:websockets - Support the WebSocket protocol.
app-misc/muttprint:doc - Builds documentation
app-misc/neofetch:X - Enable support for detecting DEs, WMs, screen resolutions, and showing images from an X terminal
app-misc/note:general - Add support for ascii flatfile backend
app-misc/note:text - Add support for text backend
app-misc/openastro:jpeg - Enable exporting Astrological Charts to jpeg
app-misc/openastro:png - Enable exporting Astrological Charts to png
app-misc/pax-utils:python - Install a more powerful/faster version of lddtree
app-misc/recoll:camelcase - Enable indexing for camelCase sentences and words
app-misc/recoll:inotify - Use the Linux Kernel notification subsystem for monitoring file alterations in realtime
app-misc/recoll:session - Stop monitoring file alterations when X11 session terminates
app-misc/rlwrap:debug - Enable debug
app-misc/screen:multiuser - Enable multiuser support (by setting correct permissions)
app-misc/screen:nethack - Express error messages in nethack style
app-misc/screenfetch:X - Use the media-gfx/scrot package to take screenshots
app-misc/sphinx:id64 - use 64-bit document and word IDs
app-misc/sphinx:re2 - use the dev-libs/re2 regular expression library
app-misc/sphinx:stemmer - Enable language stemming support
app-misc/task:sync - Enable "task sync" support
app-misc/tasque:hiveminder - Allows you to use http://www.hiveminder.com/ as your storage backend.
app-misc/tasque:rememberthemilk - Allows you to use http://www.rememberthemilk.com/ as your storage backend.
app-misc/tmux:utempter - Include libutempter support
app-misc/towitoko:moneyplex - Makes libtowitoko work for the moneyplex home banking software
app-misc/tracker:cue - Enable cue sheet parsing
app-misc/tracker:firefox-bookmarks - Install bookmark data miner plugin for www-client/firefox and www-client/firefox-bin
app-misc/tracker:gsf - Enable gnome-extra/libgsf based data extractor and for ODT.
app-misc/tracker:iptc - Enable extraction of IPTC data from pictures
app-misc/tracker:iso - Enable extraction of metadata from ISO disk images
app-misc/tracker:miner-fs - Enable tracker-miner-fs (required for filesystem indexing)
app-misc/tracker:nautilus - Enable tracker to integrate with gnome-base/nautilus by providing entries in its context menu
app-misc/tracker:playlist - Add support for playlists
app-misc/tracker:stemmer - Add word stemming via dev-libs/snowball-stemmer.
app-misc/tracker:thunderbird - Install email data miner plugin for mail-client/thunderbird and mail-client/thunderbird-bin
app-misc/tracker:xps - Add support for XPS file format through app-text/libgxps.
app-misc/unfoo:minimal - Do not install all support archive binaries
app-misc/vifm:X - Add support for X11
app-misc/vifm:compatibility - Compatibility with previous versions of vifm
app-misc/vifm:developer - Enable features of interest to developers
app-misc/vifm:extended-keys - Support for extended keys (arrows, home etc)
app-misc/vifm:gtk - Use gtk+ to determine mimetypes
app-misc/vifm:magic - Use libmagic to determine mimetypes
app-misc/vifm:vim - Install the vifm vim plugin and vim-compatible documentation
app-misc/vifm:vim-plugin - Install the vifm vim plugin
app-misc/vifm:vim-syntax - Pulls in related vim syntax scripts
app-misc/worker:avfs - Enable support for sys-fs/avfs
app-misc/worker:magic - Add magic file support from sys-apps/file to automatically detect file types
app-misc/workrave:mate - Add support for MATE panel
app-misc/workrave:xfce - Add support for XFCE panel
app-misc/zygrib:maps - Installs additional GSHHS maps for high resolution coastline data and cities
app-mobilephone/gammu:irda - Enables infrared support
app-mobilephone/gnokii:ical - Enable support for dev-libs/libical
app-mobilephone/gnokii:irda - Enable infrared support
app-mobilephone/gnokii:pcsc-lite - Enable smartcard support with sys-apps/pcsc-lite
app-mobilephone/gnokii:sms - Enable SMS support (build smsd)
app-mobilephone/smstools:stats - Enable statistic reporting
app-office/abiword:collab - Enable collaborative editing plugin
app-office/abiword:goffice - Enable goffice plugin
app-office/abiword:grammar - Enable grammar checking via dev-libs/link-grammar
app-office/abiword:map - Enable world map support through media-libs/libchamplain
app-office/abiword:math - Enable support for x11-libs/gtkmathview
app-office/abiword:ots - Enable Text Summarizer plugin
app-office/abiword:plugins - Enable plugins build (see http://www.abisource.com/wiki/PluginMatrix for more information). If your file cannot be opened due lack of support, try enabling this.
app-office/abiword:redland - Enables support redland and raptor libs.
app-office/abiword:thesaurus - Enable thesaurus support
app-office/abiword:wordperfect - Enable wordperfect file support via app-text/libwpd
app-office/calligra:activities - Enable kactivities support
app-office/calligra:import-filter - Enable support for various import filter file formats like WordPerfect, Visio and Apple Keynote
app-office/calligra:lcms - Build colorengine plugins using media-libs/lcms
app-office/calligra:okular - Enable bindings for kde-apps/okular
app-office/calligra:phonon - Build stage/eventplugins and videoshape plugin using media-libs/phonon
app-office/calligra:pim - Enable support for KDE PIM resources integration
app-office/calligra:spacenav - Enable support for the 3Dconnexion spacenav input device via dev-libs/libspnav
app-office/glabels:barcode - Enable barcode support through external libraries.
app-office/gnucash:chipcard - Enable support for chipcard reading and processing.
app-office/gnucash:hbci - Enable HBCI support, for connecting to some internet banks
app-office/gnucash:quotes - Enable Online Stock Quote retrieval
app-office/gnumeric:libgda - Enable database support through gnome-extra/libgda.
app-office/gnumeric:perl - Enable perl plugin loader.
app-office/gnumeric:python - Enable python plugin loader.
app-office/kexi:marble - Enable displaying of maps using kde-apps/marble
app-office/kexi:mdb - Enable support for Microsoft Access database
app-office/kexi:webkit - Enable web form designer widget using dev-qt/qtwebkit
app-office/kmymoney:hbci - Enable HBCI support using net-libs/aqbanking
app-office/kmymoney:pim - Enable KDE PIM integration via kde-apps/kdepimlibs
app-office/kmymoney:quotes - Enable Online Stock Quote retrieval
app-office/kmymoney:weboob - Enable import of online banking transactions extracted by www-client/weboob
app-office/libreoffice:coinmp - Use sci-libs/coinor-mp as alternative solver
app-office/libreoffice:collada - Enable Collada for rendering 3D models stored in *.dae and *.kmz format
app-office/libreoffice:gltf - Use media-libs/libgltf for inserting 3D models in the glTF format into presentations
app-office/libreoffice:googledrive - Enable support for remote files on Google Drive
app-office/libreoffice:gtk3 - Enable highly experimental gtk3 frontend
app-office/libreoffice:jemalloc - Use dev-libs/jemalloc for allocations
app-office/libreoffice:odk - Build the Office Development Kit
app-office/libreoffice:pdfimport - Enable PDF import via the Poppler library
app-office/libreoffice:quickstarter - Build the system tray quickstarter
app-office/libreoffice:telepathy - Enable document colaboration features using telepathy communication framework.
app-office/libreoffice:vlc - Use media-video/vlc for video embedding
app-office/libreoffice-l10n:offlinehelp - Install help files locally instead of using the LibreOffice Wiki
app-office/lyx:aspell - Add support for aspell spellchecking
app-office/lyx:dia - Add support for diagrams (app-office/dia)
app-office/lyx:docbook - Add support for docbook export
app-office/lyx:dot - Add support for DOT import (media-gfx/graphviz)
app-office/lyx:enchant - Add support for enchant spellchecking wrapper (both aspell and hunspell can be used by LyX).
app-office/lyx:gnumeric - Add support for importing Gnumeric/OpenOffice/MS Excel spreadsheets into LyX.
app-office/lyx:html - Add support for HTML import
app-office/lyx:hunspell - Add support for spellchecking based on hunspell and reuse system-wide OpenOffice dictionaries. This also enable thesaurus dictionaries not accessible via aspell.
app-office/lyx:monolithic-build - This should speed up compilation significantly when you have enough RAM (> 600 MB)
app-office/lyx:rcs - Add support for revision control via dev-vcs/rcs
app-office/lyx:rtf - Add support for RTF import/export packages
app-office/magicpoint:contrib - Install additional contributed scripts
app-office/orage:clock-panel-plugin - Build the clock plugin for the XFCE panel
app-office/scribus:boost - Enable support for Boost based enhancement
app-office/scribus:hunspell - Enable support for spell checking with app-text/hunspell
app-office/scribus:minimal - Don't install headers (only required for e.g. plug-in developers)
app-office/scribus:osg - 3D redering via dev-games/openscenegraph
app-office/scribus:scripts - Install the scripts
app-office/scribus:templates - Document tamplates
app-office/scribus:tk - Install tk based scripts e.g. FontSample.py
app-office/skrooge:activities - Enable kactivities support
app-office/skrooge:designer - Build plugins for dev-qt/designer
app-office/texmacs:netpbm - Add support for media-libs/netpbm
app-office/texmacs:pdf - Add the experimental native pdf export
app-office/texstudio:video - Use phonon for video embedding
app-office/wps-office:sharedfonts - Install WPS fonts available system wide
app-pda/barry:boost - Enable boost support
app-pda/barry:desktop - Install the GUI desktop control panel
app-pda/barry:gui - Install the GUI backup tool
app-pda/gtkpod:clutter - Enable clutter support for displaying coverart
app-portage/conf-update:colordiff - Use colors when displaying diffs (app-misc/colordiff)
app-portage/conf-update:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
app-portage/eix:debug - Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use.
app-portage/eix:doc - Create description of the eix cache file additionally in html format
app-portage/eix:sqlite - Compile in support for portage's sqlite backend; to actually use it you need additional configuration of portage and eix
app-portage/g-sorcery:bson - Support BSON file format for package DB
app-portage/layman:bazaar - Support dev-vcs/bzr based overlays
app-portage/layman:cvs - Support dev-vcs/cvs based overlays
app-portage/layman:darcs - Support dev-vcs/darcs based overlays
app-portage/layman:g-sorcery - Support app-portage/g-sorcery based overlays
app-portage/layman:git - Support dev-vcs/git based overlays
app-portage/layman:gpg - Support app-crypt/gnupg signed overlays lists and manifests
app-portage/layman:mercurial - Support dev-vcs/mercurial based overlays
app-portage/layman:squashfs - Support mounting squashfs image overlays locally read-only
app-portage/layman:subversion - Support dev-vcs/subversion based overlays
app-portage/layman:sync-plugin-portage - Install the sys-apps/portage sync module
app-portage/pfl:network-cron - Adds a cron job which does a weekly submit of the package database
app-portage/tatt:templates - Install template scripts to be used with tatt
app-shells/autojump:ipython - Add support for dev-python/ipython
app-shells/bash:bashlogger - Log ALL commands typed into bash; should ONLY be used in restricted environments such as honeypots
app-shells/bash:mem-scramble - Build with custom malloc/free overwriting allocated/freed memory
app-shells/bash:net - Enable /dev/tcp/host/port redirection
app-shells/bash:plugins - Add support for loading builtins at runtime via 'enable'
app-shells/dash:vanilla - Support echo -n, and enable echo -e all the time (unsupported)
app-shells/mpv-bash-completion:luajit - Use dev-lang/luajit instead of dev-lang/lua
app-shells/pdsh:rsh - This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.
app-shells/scsh-install-lib:scsh - Use a non-FHS directory layout
app-shells/shish:diet - Use dev-libs/dietlibc
app-text/asciidoc:highlight - Enable source code highlighting
app-text/atril:caja - Enable property page extension in mate-base/caja
app-text/atril:dvi - Enable build-in DVI viewer
app-text/atril:epub - Enable build-in DVI viewer using net-libs/webkit-gtk
app-text/atril:gtk3 - Build with GTK+3 instead of GTK+2
app-text/atril:t1lib - Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib)
app-text/atril:xps - Enable XPS viewer using app-text/libgxps
app-text/blogc:git - Build blogc-git-receiver tool
app-text/blogc:httpd - Build blogc-runserver tool
app-text/blogc:make - Build blogc-make tool
app-text/cb2bib:webengine - Use dev-qt/qtwebengine instead of dev-qt/qtwebkit
app-text/crm114:mew - Add support for using the mewdecode mime decoder (app-emacs/mew)
app-text/crm114:mimencode - Add support for using the mimencode mime (net-mail/metamail)
app-text/crm114:normalizemime - Add support for using the normalizemime (mail-filter/normalizemime)
app-text/dbacl:interactive - Enable the interactive mailinspect ability
app-text/dictd:judy - Build Judy-based (dev-libs/judy) plugin implementing fast "exact" and especially "lev" strategies
app-text/dictd:minimal - Don't build server but dict client, dictzip and dictfmt only.
app-text/docbook-sgml-utils:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/docbook-xsl-ns-stylesheets:ruby - Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.
app-text/docbook-xsl-stylesheets:ruby - Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.
app-text/ebook-tools:lit2epub - Install lit2epub script
app-text/editorconfig-core-c:cli - Install command line interface.
app-text/enchant:aspell - Adds support for app-text/aspell spell checker
app-text/enchant:hunspell - Adds support for app-text/hunspell spell checker
app-text/enchant:zemberek - Adds support for app-text/zemberek-server spell checker server
app-text/evince:dvi - Enable the built-in DVI viewer
app-text/evince:nautilus - Enable property page extension in gnome-base/nautilus
app-text/evince:t1lib - Enable the Type-1 fonts for the built-in DVI viewer (media-libs/t1lib)
app-text/evince:xps - Enable XPS viewer using app-text/libgxps
app-text/getxbook:ocr - Use app-text/tesseract for optical character recognition
app-text/ghostscript-gpl:unicode - Add support for unicode passwords via net-dns/libidn
app-text/glark:zip - Support for ZIP files using dev-ruby/rubyzip
app-text/groonga:abort - Enable query abortion
app-text/groonga:benchmark - Build benchmark programs
app-text/groonga:dynamic-malloc-change - Allow dynamic memory allocation change for testing
app-text/groonga:exact-alloc-count - Atomic counting for memory alloc count
app-text/groonga:fmalloc - Make memory allocation failed in specified condition for debug
app-text/groonga:futex - Use futex
app-text/groonga:libevent - Enable dev-libs/libevent used for suggestion
app-text/groonga:mecab - Use app-text/mecab for morphological analysis
app-text/groonga:msgpack - Enable dev-libs/msgpack used for suggestion
app-text/groonga:nfkc - Use nfkc based utf8 normalization
app-text/groonga:sphinx - Enable document generation by app-misc/sphinx
app-text/groonga:uyield - Build for detecting race conditions
app-text/groonga:zeromq - Enable net-libs/zeromq used for suggestion
app-text/gtranslator:gnome-dictionary - Enable plugin for dictionary lookups using app-dicts/gnome-dictionary.
app-text/gtranslator:gucharmap - Enable plugin for unicode symbols selection using gnome-extra/gucharmap.
app-text/hyperestraier:mecab - Enable app-text/mecab support for Estraier
app-text/jmupdf:system-mupdf - Link against system version of app-text/mupdf
app-text/lcdf-typetools:kpathsea - Enable integration with kpathsea search library (TeX related)
app-text/libebook:tools - Build file conversion tools
app-text/libmwaw:tools - Build file conversion tools
app-text/libstaroffice:tools - Build conversion tools
app-text/libstaroffice:zlib - Enable support for compressed data
app-text/libwpd:tools - Build file conversion tools
app-text/libwps:tools - Build file conversion tools
app-text/mathtex:png - Generate png images by default instead of gif
app-text/mupdf:openssl - Use dev-libs/openssl crypto backend
app-text/pandoc:embed_data_files - Embed data files in binary for relocatable executable.
app-text/pandoc:http-conduit - Enable downloading of resources over https.
app-text/pandoc:https - Enable support for downloading of resources over https.
app-text/pandoc:make-pandoc-man-pages - Build program to regenerate pandoc man pages from README.
app-text/pandoc:network-uri - Get Network.URI from the network-uri package.
app-text/pandoc:trypandoc - Build trypandoc cgi executable.
app-text/pandoc:weigh-pandoc - Build weigh-pandoc to measure memory usage.
app-text/pastebinit:crypt - Install pbputs for gpg-encrypted pastes
app-text/pdfgrep:unac - Removing accents and ligatures before search
app-text/pelican:markdown - Markdown support
app-text/podofo:boost - Add support for boost
app-text/podofo:tools - Build and install commandline tools.
app-text/poppler:cairo-qt - Enable experimental Cairo font rasterizer for Qt4 backend.
app-text/poppler:nss - Enable signatures handling with dev-libs/nss
app-text/poppler:utils - Install command-line PDF converters and various utilities.
app-text/qpdf:perl - Install fix-qdf tool (for reverting PDF edits) written in perl
app-text/qpdfview:fitz - Use experimental fitz rendering, provided by app-text/mupdf, instead of poppler
app-text/qpdfview:synctex - Add support for searching TeX sources
app-text/sdcv:darkterm - Improve readability of color output on terminals with dark background.
app-text/sgmltools-lite:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/stardict:advertisement - Enable stardict advertisements plugin
app-text/stardict:cal - Enable calendar support using cal program
app-text/stardict:dictdotcn - Enable dict.cn network plugin (for Chinese language)
app-text/stardict:espeak - Enable text to speech synthesizer plugin using app-accessibility/espeak engine
app-text/stardict:flite - Enable text to speech synthesizer plugin using app-accessibility/flite engine
app-text/stardict:fortune - Enable plugin to read fortune messages using games-misc/fortune-mod. You may consider installing games-misc/fortune-mod-all to get all fortune messages.
app-text/stardict:gucharmap - Enable plugin for unicode symbols description using gnome-extra/gucharmap
app-text/stardict:htmlparse - Enable plugin to parse dictionaries with html content
app-text/stardict:info - Enable plugin to read info pages
app-text/stardict:man - Enable plugin to read manual pages
app-text/stardict:powerwordparse - Enable plugin to parse powerword dictionaries
app-text/stardict:pronounce - Install WyabdcRealPeopleTTS package (it is just many .wav files) to make StarDict pronounce English words
app-text/stardict:qqwry - Enable QQWry plugin, which provides information (in Chinese language) about geographical positions, owner, etc. for IP addresses
app-text/stardict:tools - Build and install dictionary management tools and converters from various dictionary formats
app-text/stardict:updateinfo - Enable plugin to check for stardict updates
app-text/stardict:wikiparse - Enable plugin to parse dictionaries in wikimedia format
app-text/stardict:wordnet - Enable wordnet plugin to find similar English words using lexical database
app-text/stardict:xdxfparse - Enable plugin to parse dictionaries in xdxf (XML Dictionary eXchange Format)
app-text/stardict:youdaodict - Enable youdao.com network plugin (for Chinese language)
app-text/tesseract:math - Enable support for recognition of equations.
app-text/tesseract:opencl - Enable opencl support for speedup using GPU computation.
app-text/tesseract:osd - Enable support orientation and script detection.
app-text/tesseract:scrollview - Install viewer to debug recognition (ScrollView).
app-text/tesseract:training - Install training applications to add support for new languages.
app-text/tesseract:webp - Enable support for webp image format.
app-text/texlive:context - Add support for the ConTeXt format (dev-texlive/texlive-context)
app-text/texlive:detex - Add support for dev-tex/detex, a filter program that removes the LaTeX (or TeX) control sequences
app-text/texlive:dvi2tty - Add support for dev-tex/dvi2tty to preview dvi-files on text-only devices
app-text/texlive:epspdf - Add support for app-text/epspdf, a tool for converting [e]ps files to pdf.
app-text/texlive:extra - Add support for extra TeXLive packages
app-text/texlive:games - Add typesetting support for games (chess, etc.) (dev-texlive/texlive-games)
app-text/texlive:graphics - Add support for several graphics packages (pgf, tikz,...)
app-text/texlive:humanities - Add LaTeX support for the humanities (dev-texlive/texlive-humanities)
app-text/texlive:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/texlive:luatex - Add extra support for luatex
app-text/texlive:metapost - Add support for metapost: A tool for creating graphics in scalable PostScript.
app-text/texlive:music - Add support for music typesetting (dev-texlive/texlive-music)
app-text/texlive:omega - Add omega packages (dev-texlive/texlive-omega)
app-text/texlive:pdfannotextractor - Add dev-tex/pdfannotextractor support, for extracting annotations from PDF files.
app-text/texlive:pstricks - Add pstricks packages (dev-texlive/texlive-pstricks)
app-text/texlive:publishers - Add support for publishers (dev-texlive/texlive-publishers)
app-text/texlive:science - Add typesetting support for natural and computer sciences (dev-texlive/texlive-science)
app-text/texlive:tex4ht - Add support for dev-tex/tex4ht (for converting (La)TeX to (X)HTML, XML and OO.org)
app-text/texlive:texi2html - Add support for app-text/texi2html which converts texi files to HTML.
app-text/texlive:xetex - Add support for XeTeX macros (dev-texlive/texlive-xetex)
app-text/texlive:xindy - Add support for app-text/xindy, a flexible indexing system
app-text/texlive-core:luajittex - Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.
app-text/texlive-core:xetex - Add support for XeTeX: a TeX system with Unicode and modern font technologies.
app-text/wdiff:experimental - Build experimental utilities (mdiff, unify, wdiff2)
app-text/webgen:builder - Enable programmatic HTML/XML generation
app-text/webgen:highlight - Enable syntax highlighting for certain plugins
app-text/webgen:markdown - Markdown support
app-text/wklej:vim - Install the vim plugin allowing to paste through ':Wklej'.
app-text/writerperfect:abiword - Add support for abiword format using app-text/libabw
app-text/writerperfect:ebook - Add support for various ebook formats using app-text/libebook
app-text/writerperfect:freehand - Add support for freehand format using media-libs/libfreehand
app-text/writerperfect:gsf - Add support for structured files using gnome-extra/libgsf
app-text/writerperfect:keynote - Add support for keynote format using app-text/libetonyek
app-text/writerperfect:mspub - Add support to mspub format using app-text/libmspub
app-text/writerperfect:mwaw - Add support to mwaw formats using app-text/libmwaw
app-text/writerperfect:pagemaker - Add support to pagemaker formats using media-libs/libpagemaker
app-text/writerperfect:visio - Add support for visio format using media-libs/libvisio
app-text/writerperfect:wpd - Add support for wpd format using app-text/libwpd
app-text/writerperfect:wpg - Add support for wpg format using app-text/libwpg
app-text/writerperfect:wps - Add support for wps format using app-text/libwps
app-text/wv:tools - Install optional utilities considered deprecated in favor of using AbiWord.
app-text/xmlto:text - Support conversion from XML to plain text
app-text/yagf:cuneiform - Enable support for the app-text/cuneiform OCR engine.
app-text/yagf:tesseract - Enable support for the app-text/tesseract OCR engine.
app-text/zathura:magic - Use libmagic to determine mimetypes
app-text/zathura:synctex - Use libsynctex to get latex codeline from pdf
app-text/zathura-meta:cb - Install plug-in for ComicBook support
app-vim/gentoo-syntax:ignore-glep31 - Remove GLEP 31 (UTF-8 file encodings) settings
app-vim/vim-latex:html - Install HTML documentation
app-vim/vim-latex:python - Enable python support which can help speed up some functionality
app-vim/youcompleteme:clang - Enable semantic support for C-family languages using sys-devel/clang
dev-ada/asis:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/asis:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/aws:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/aws:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnat_util:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnat_util:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnat_util:shared - Build gnat_util shared library
dev-ada/gnat_util:static - Build gnat_util static library
dev-ada/gnat_util:static-pic - Build gnat_util static library with pic code
dev-ada/gnatcoll:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gnatcoll:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gnatcoll:postgresql - Adds support for postgresql
dev-ada/gnatcoll:projects - Adds support for projects
dev-ada/gnatcoll:pygobject - Adds support for pygobject
dev-ada/gnatcoll:shared - Build shared library
dev-ada/gnatcoll:static - Build static library
dev-ada/gnatcoll:tools - Build associated tools
dev-ada/gprbuild:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gprbuild:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gprbuild:shared - Build shared library
dev-ada/gprbuild:static - Build static library
dev-ada/gprbuild:static-pic - Build static library with pic code
dev-ada/gtkada:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/gtkada:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/gtkada:shared - Build gtkada as shared library
dev-ada/gtkada:static - Build gtkada as static library
dev-ada/xmlada:gnat_2016 - Compile with dev-lang/gnat-gpl-2016
dev-ada/xmlada:gnat_2017 - Compile with dev-lang/gnat-gpl-2017
dev-ada/xmlada:shared - Build shared library
dev-ada/xmlada:static - Build static library
dev-ada/xmlada:static-pic - Build static library with pic code
dev-cpp/eigen:c++11 - Build using the C++11 standard
dev-cpp/eigen:cpu_flags_x86_f16c - Take advantage of CPU feature f16c
dev-cpp/eigen:cuda - Build with cuda support
dev-cpp/glog:gflags - Use dev-cpp/gflags for flag parsing
dev-cpp/glog:unwind - Use sys-libs/libunwind for stack unwinding instead of glibc/gcc (may be more reliable on x86_64)
dev-cpp/libcmis:man - Build and install man pages.
dev-cpp/libjson-rpc-cpp:http-client - Build support for HTTP client using net-misc/curl
dev-cpp/libjson-rpc-cpp:http-server - Build support for HTTP server using net-libs/libmicrohttpd
dev-cpp/libjson-rpc-cpp:stubgen - Build header stub code generator (needed for development and when pregenerated headers are not bundled)
dev-cpp/pficommon:fcgi - Build FCGI feature
dev-cpp/pficommon:mprpc - Build MessagePack RPC feature
dev-cpp/websocketpp:boost - Use dev-libs/boost instead of C++11
dev-cpp/xsd:ace - Enable support for serializing to/from an ACE CDR stream
dev-db/aerospike-server-community:tools - Install extra tools
dev-db/cppdb:mysql_internal - Don't build a separate mysql loadable module but rather build it into the cppdb library itself
dev-db/cppdb:odbc_internal - Don't build a separate postgresql loadable module but rather build it into the cppdb library itself
dev-db/cppdb:postgres_internal - Don't build a separate odbc loadable module but rather build it into the cppdb library itself
dev-db/cppdb:sqlite_internal - Don't build a separate sqlite3 loadable module but rather build it into the cppdb library itself
dev-db/firebird:server - Install the server components of Firebird, not just the client
dev-db/firebird:superserver - Install SuperServer
dev-db/firebird:xinetd - Install ClassicServer
dev-db/haildb:debug - Enable extra debug codepaths and assertions. If disabled, both the debug code and assertions are removed from the resulting binaries. Optimisations are untouched.
dev-db/haildb:zlib - Add support for compressed tables through sys-libs/zlib.
dev-db/maatkit:udf - Build the MySQL UDFs shipped with maatkit, requires non-minimal MySQL
dev-db/mariadb:backup - Build mariadb-backup which supports SST and hot backup of InnoDB, Aria and MyISAM including compression and encryption
dev-db/mariadb:cluster - Add support for NDB clustering (deprecated)
dev-db/mariadb:community - Enables the community features from upstream.
dev-db/mariadb:embedded - Build embedded server (libmysqld)
dev-db/mariadb:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mariadb:galera - Enables galera replication
dev-db/mariadb:innodb-lz4 - Enables lz4 compression methods for InnoDB/XtraDB
dev-db/mariadb:innodb-lzo - Enables lzo compression methods for InnoDB/XtraDB
dev-db/mariadb:innodb-snappy - Enables snappy compression methods for InnoDB/XtraDB using app-arch/snappy
dev-db/mariadb:jdbc - Enable the CONNECT engine to access foreign databases via JDBC
dev-db/mariadb:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/mariadb:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mariadb:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
dev-db/mariadb:max-idx-128 - Raise the max index per table limit from 64 to 128
dev-db/mariadb:minimal - Install client programs only, no server
dev-db/mariadb:mroonga - Add support for the Mroonga engine for interfacing with the Groonga text search
dev-db/mariadb:openssl - Enable SSL connections and crypto functions using dev-libs/openssl
dev-db/mariadb:oqgraph - Add support for the Open Query GRAPH engine
dev-db/mariadb:pam - Enable the optional PAM authentication plugin for the server
dev-db/mariadb:profiling - Add support for statement profiling (requires USE=community).
dev-db/mariadb:rocksdb - Add support for RocksDB; a key/value, LSM database optimized for flash storage
dev-db/mariadb:server - Build the server program
dev-db/mariadb:sphinx - Add suport for the sphinx full-text search engine
dev-db/mariadb:sst-rsync - Add tools needed to support the rsync SST method
dev-db/mariadb:sst-xtrabackup - Add tools needed to support the xtrabackup and xtrabackup-v2 SST methods
dev-db/mariadb:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mariadb:test - Install upstream testsuites for end use.
dev-db/mariadb:tokudb - Add support for TokuDB storage engine
dev-db/mariadb:yassl - Enable SSL connections and crypto functions using the bundled yaSSL
dev-db/mariadb-galera:embedded - Build embedded server (libmysqld)
dev-db/mariadb-galera:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mariadb-galera:jdbc - Enable the CONNECT engine to access foreign databases via JDBC
dev-db/mariadb-galera:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/mariadb-galera:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mariadb-galera:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
dev-db/mariadb-galera:openssl - Enable SSL connections and crypto functions using dev-libs/openssl
dev-db/mariadb-galera:oqgraph - Add support for the Open Query GRAPH engine
dev-db/mariadb-galera:profiling - Add support for statement profiling (requires USE=community).
dev-db/mariadb-galera:server - Build the server program
dev-db/mariadb-galera:sphinx - Add suport for the sphinx full-text search engine
dev-db/mariadb-galera:sst-rsync - Add tools needed to support the rsync SST method
dev-db/mariadb-galera:sst-xtrabackup - Add tools needed to support the xtrabackup and xtrabackup-v2 SST methods
dev-db/mariadb-galera:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mariadb-galera:test - Install upstream testsuites for end use.
dev-db/mariadb-galera:tokudb - Add support for TokuDB storage engine
dev-db/mariadb-galera:yassl - Enable SSL connections and crypto functions using the bundled yaSSL
dev-db/maxscale:jemalloc - Use dev-libs/jemalloc for allocations
dev-db/maxscale:rabbitmq - Add support for RabbitMQ message queue
dev-db/mongodb:mms-agent - Install the MongoDB Monitoring Service agent
dev-db/mongodb:tools - Install the MongoDB tools (mongoimport, mongodump...) from app-admin/mongo-tools
dev-db/mysql:cluster - Add support for NDB clustering (deprecated)
dev-db/mysql:community - Enables the community features from upstream.
dev-db/mysql:embedded - Build embedded server (libmysqld)
dev-db/mysql:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mysql:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/mysql:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mysql:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
dev-db/mysql:max-idx-128 - Raise the max index per table limit from 64 to 128
dev-db/mysql:minimal - Install client programs only, no server
dev-db/mysql:openssl - Enable SSL connections and crypto functions using dev-libs/openssl
dev-db/mysql:profiling - Add support for statement profiling (requires USE=community).
dev-db/mysql:server - Build the server program
dev-db/mysql:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mysql:test - Install upstream testsuites for end use.
dev-db/mysql:yassl - Enable SSL connections and crypto functions using the bundled yaSSL
dev-db/mysql-cluster:cluster - Add support for NDB clustering
dev-db/mysql-cluster:community - Enables the community features from upstream.
dev-db/mysql-cluster:embedded - Build embedded server (libmysqld)
dev-db/mysql-cluster:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mysql-cluster:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/mysql-cluster:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mysql-cluster:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
dev-db/mysql-cluster:max-idx-128 - Raise the max index per table limit from 64 to 128
dev-db/mysql-cluster:minimal - Install client programs only, no server
dev-db/mysql-cluster:openssl - Enable SSL connections and crypto functions using dev-libs/openssl
dev-db/mysql-cluster:profiling - Add support for statement profiling (requires USE=community).
dev-db/mysql-cluster:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mysql-cluster:test - Install upstream testsuites for end use.
dev-db/mysql-cluster:yassl - Enable SSL connections and crypto functions using the bundled yaSSL
dev-db/mysql-connector-c++:gcov - Build coverage support
dev-db/oracle-instantclient:jdbc - Support for XA, Internationalization, and RowSet operations under JDBC.
dev-db/oracle-instantclient:odbc - Libraries for enabling ODBC applications.
dev-db/oracle-instantclient:sdk - Header files and an example makefile for developing Oracle applications.
dev-db/oracle-instantclient:sqlplus - Libraries and executable for running SQL*Plus.
dev-db/oracle-instantclient:tools - Workload Replay Client.
dev-db/percona-server:embedded - Build embedded server (libmysqld)
dev-db/percona-server:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/percona-server:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/percona-server:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/percona-server:libressl - Enable SSL connections and crypto functions using dev-libs/libressl
dev-db/percona-server:numa - Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)
dev-db/percona-server:openssl - Enable SSL connections and crypto functions using dev-libs/openssl
dev-db/percona-server:profiling - Add support for statement profiling (requires USE=community).
dev-db/percona-server:server - Build the server program
dev-db/percona-server:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/percona-server:test - Install upstream testsuites for end use.
dev-db/percona-server:tokudb - Add support for TokuDB storage engine
dev-db/percona-server:tokudb-backup-plugin - Builds the TokuDB backup plugin
dev-db/percona-server:yassl - Enable SSL connections and crypto functions using the bundled yaSSL
dev-db/pgadmin3:databasedesigner - Enable the Database Designer component
dev-db/pgbouncer:libevent - Use libevent 2.0+ and evdns as the DNS backend
dev-db/pgbouncer:udns - Use udns as the DNS backend. Supports IPv4 only.
dev-db/pgpool2:memcached - Use memcached for query caching.
dev-db/pgrouting:drivingdistance - Enable to calculate driving distance
dev-db/pgrouting:html - Install HTML formatted documentation
dev-db/phpmyadmin:setup - Installs the phpMyAdmin setup utility. Users who don't use the utility should disable this USE flag for security reasons as the setup tool was the target of various exploits in the past.
dev-db/postgis:gtk - Build shp2pgsql-gui a graphical interface to shp2pgsql
dev-db/postgresql:pg_legacytimestamp - Use double precision floating-point numbers instead of 64-bit integers for timestamp storage.
dev-db/postgresql:server - Disable to build and install the clients and libraries only.
dev-db/postgresql:uuid - Enable server side UUID generation (via dev-libs/ossp-uuid).
dev-db/psqlodbc:iodbc - Use dev-db/libiodbc. Disable to use dev-db/unixODBC.
dev-db/recutils:curl - Enable support for remote descriptors using libcurl
dev-db/recutils:mdb - Build the mdb2rec utility
dev-db/recutils:uuid - Enable support for uuid types
dev-db/redis:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/redis:luajit - Use dev-lang/luajit instead of dev-lang/lua
dev-db/redis:tcmalloc - Use tcmalloc from dev-util/google-perftools for allocations.
dev-db/rethinkdb:jemalloc - Use dev-libs/jemalloc for allocations (default).
dev-db/rethinkdb:tcmalloc - Use tcmalloc from dev-util/google-perftools for allocations.
dev-db/soci:boost - Enable boost support
dev-db/soci:empty - Build the sample backend called Empty
dev-db/spatialite:geos - Add the sci-libs/geos library for exact topological tests
dev-db/spatialite:proj - Add the sci-libs/proj library for reprojection features
dev-db/spatialite:xls - Add the dev-libs/freexl library for xls import support
dev-db/sqlite:secure-delete - Enable overwriting of deleted content with zeros by default (http://sqlite.org/pragma.html#pragma_secure_delete), causing some performance penalty
dev-db/sqlite:tools - Install additional tools
dev-db/sqlitestudio:cli - Build CLI interface
dev-db/tokumx:pax_kernel - Apply patch needed for hardened kernels
dev-db/unixODBC:minimal - Disable bundled drivers and extra libraries (most users don't need these)
dev-db/unixODBC:odbcmanual - Administrator, Internal Structure, Programmer and User documentation
dev-embedded/avrdude:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-embedded/libftdi:tools - build ftdi_eeprom helper tool
dev-embedded/openocd:blaster - Enable support for Altera USE-Blaster
dev-embedded/openocd:cmsis-dap - Support for CMSIS-DAP compliant adapters
dev-embedded/openocd:dummy - Build the dummy port driver
dev-embedded/openocd:ftd2xx - Enable support for USB FTDI chips via dev-embedded/libftd2xx
dev-embedded/openocd:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-embedded/openocd:jlink - Build the SEGGER J-Link driver
dev-embedded/openocd:minidriver - Build the dummy minidriver
dev-embedded/openocd:parport - Enable support for parport JTAG devices
dev-embedded/openocd:presto - Enable support for AXIS PRESTO devices
dev-embedded/openocd:segger - Enable support for the Segger J-Link JTAG
dev-embedded/openocd:stlink - Enable building support for the ST-Link JTAG Programmer
dev-embedded/openocd:verbose-io - Verbose IO and comm JTAG and USB messages
dev-embedded/openocd:versaloon - Enable building support for the Versallon-lInk JTAG
dev-embedded/sdcc:boehm-gc - Enable Hans Boehm's garbage collector dev-libs/boehm-gc
dev-embedded/sdcc:device-lib - Enable built of devices libraries
dev-embedded/sdcc:ds390 - Add support for Dallas DS390
dev-embedded/sdcc:ds400 - Add support for Dallas DS400
dev-embedded/sdcc:gbz80 - Add support for Gameboy gbz80
dev-embedded/sdcc:hc08 - Add support for Freescale/Motorola HC08 based
dev-embedded/sdcc:mcs51 - Add support for Intel mcs51
dev-embedded/sdcc:non-free - Enable non-free runtime library parts
dev-embedded/sdcc:packihx - Enable Intel HEX files pack utility
dev-embedded/sdcc:pic14 - Add support for Microchip 14 bits PICs
dev-embedded/sdcc:pic16 - Add support for Microchip 16 bits PICs
dev-embedded/sdcc:r2k - Add support for Rabbit 2000
dev-embedded/sdcc:r3ka - Add support for Rabbit 3000A
dev-embedded/sdcc:s08 - Add support for Freescale/Motorola S08
dev-embedded/sdcc:sdbinutils - Enable SDCC library archive utilities sdar, sdranlib, sdnm
dev-embedded/sdcc:sdcdb - Enable SDCC source level debugger
dev-embedded/sdcc:sdcpp - Enable SDCC preprocessor based on GCC cpp
dev-embedded/sdcc:stm8 - Add support for STMicroelectronics STM8
dev-embedded/sdcc:tlcs90 - Add support for TLCS-90
dev-embedded/sdcc:ucsim - Enable software simulator for microcontrollers
dev-embedded/sdcc:z180 - Add support for Zilog Z180
dev-embedded/sdcc:z80 - Add support for Zilog Z80
dev-embedded/urjtag:ftd2xx - Enable support for USB FTDI chips via dev-embedded/libftd2xx
dev-embedded/urjtag:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-games/aseprite:bundled-libs - Use the upstream provided bundled version of allegro 4.4.2
dev-games/aseprite:gtk3 - Enable support for the experimental native GTK File Dialog
dev-games/aseprite:webp - Enable webp image format support
dev-games/cegui:devil - Build the DevIL based ImageCodec module
dev-games/cegui:freeimage - Build the FreeImage based ImageCodec module
dev-games/cegui:irrlicht - Enable the Irrlicht renderer
dev-games/cegui:ogre - Enable the OGRE renderer
dev-games/cegui:tinyxml - Enable the Tiny XML parser module
dev-games/cegui:xerces-c - Enable the Xerces-C++ XML parser module
dev-games/cegui:zip - Enable the Minizip resource provider
dev-games/crystalspace:3ds - Enables support for .3DS files in CrystalSpace
dev-games/crystalspace:bullet - include support for Bullet library
dev-games/crystalspace:cal3d - include support for skeleton animation
dev-games/crystalspace:cegui - include support for Crazy Eddie GUI
dev-games/crystalspace:cg - NVIDIA toolkit plugin
dev-games/crystalspace:ode - include support for Open Dynamics Engine
dev-games/guichan:allegro - Build the Allegro frontend
dev-games/mygui:linguas_ru - Install some additional russian docs if 'doc' useflag enabled
dev-games/mygui:ogre - Use the ogre render subsystem. (cannot combine with opengl)
dev-games/mygui:opengl - Use the opengl render subsystem. (cannot combine with ogre)
dev-games/mygui:plugins - Build MyGUI plugins
dev-games/mygui:samples - Install MyGUI demos (needs ogre USE flag)
dev-games/mygui:tools - Build the tools for development
dev-games/ode:double-precision - more precise calculations at the expense of speed
dev-games/ode:gyroscopic - enable gyroscopic term (may cause instability)
dev-games/ogre:boost - enable boost support
dev-games/ogre:cg - NVIDIA toolkit plugin
dev-games/ogre:double-precision - more precise calculations at the expense of speed
dev-games/ogre:freeimage - support images via freeimage
dev-games/ogre:gl3plus - Build OpenGL 3+ RenderSystem (EXPERIMENTAL)
dev-games/ogre:gles2 - build OpenGL ES 2.x RenderSystem
dev-games/ogre:gles3 - Enable OpenGL ES 3.x Features
dev-games/ogre:ois - pull in Object-oriented Input System library for samples
dev-games/ogre:poco - when USE=threads, use poco for threading
dev-games/ogre:tbb - when USE=threads, use tbb for threading
dev-games/ogre:tools - build+install helper tools
dev-games/ogre:zip - support zip archives
dev-games/openscenegraph:asio - Enable support for dev-cpp/asio library
dev-games/openscenegraph:fox - Build examples using x11-libs/fox library
dev-games/openscenegraph:gdal - Enable support for sci-libs/gdal library
dev-games/openscenegraph:las - Enable support for geospatial data LAS LiDAR format using sci-geosciences/liblas
dev-games/openscenegraph:openinventor - Build OpenInventor plugin
dev-games/openscenegraph:osgapps - Build osg applications
dev-games/openscenegraph:sdl2 - Use media-libs/libsdl2 additionally to media-libs/libsdl
dev-games/openscenegraph:xrandr - Enable support for the X xrandr extension
dev-games/physfs:grp - Enable Build Engine GRP archive support
dev-games/physfs:hog - Enable Descent I/II HOG archive support
dev-games/physfs:mvl - Enable Descent I/II MVL archive support
dev-games/physfs:qpak - Enable Quake I/II QPAK archive support
dev-games/physfs:wad - Enable Doom WAD archive support
dev-games/physfs:zip - Enable ZIP archive support
dev-games/simgear:dns - Enable DNS resolver via net-libs/udns
dev-games/simgear:gdal - Enable alternative terrain engine based on pagedLOD via sci-libs/gdal
dev-games/simgear:subversion - Enable terrasync scenery downloader
dev-haskell/abstract-deque:usecas - Enable the reference implementation to use hardware compare-and-swap.
dev-haskell/aeson-pretty:lib-only - don't build 'aeson-pretty' executable.
dev-haskell/ansi-terminal:example - Build the example application.
dev-haskell/ansi-wl-pprint:example - Build the example application.
dev-haskell/authenticate:network-uri - Get Network.URI from the network-uri package
dev-haskell/bifunctors:semigroups - You can disable the use of the `semigroups` package using `-f-semigroups`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/bifunctors:tagged - You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/biosff:fclip - Build the fclip executable.
dev-haskell/biosff:flower - Build the flower executable.
dev-haskell/biosff:frecover - Build the frecover executable.
dev-haskell/blaze-builder-enumerator:newbuilder - use bytestring-builder instead of blaze-builder-0.3
dev-haskell/bytedump:executable - build executable file
dev-haskell/bytes:test-doctests - Enable the doctest suite when using the enable-tests option for cabal.
dev-haskell/c2hs:regression - run regression tests
dev-haskell/cabal-install:network-uri - Get Network.URI from the network-uri package.
dev-haskell/cabal-install:noprefs - Ignore 'preferred-versions' file from hackage's tarball.
dev-haskell/certificate:executable - Build the executable
dev-haskell/cgi:extensible-exceptions-in-base - Required to be enabled for >=dev-lang/ghc-7.
dev-haskell/cgi:network-uri - Get Network.URI from the network-uri package.
dev-haskell/chell:color-output - use colors in program output
dev-haskell/citeproc-hs:bibutils - use Chris Putnam's app-text/bibutils
dev-haskell/citeproc-hs:embed_data_files - Embed locale files into the library (needed for windows packaging)
dev-haskell/citeproc-hs:hexpat - use dev-haskell/hexpat instead of dev-haskell/xml for XML parsing
dev-haskell/citeproc-hs:network - use dev-haskell/network and dev-haskell/http to retrieve CSL file from URIs
dev-haskell/citeproc-hs:small_base - Choose the new smaller, split-up base package.
dev-haskell/citeproc-hs:unicode_collation - Use Haskell bindings to the dev-libs/icu
dev-haskell/cmdargs:quotation - Build quote module
dev-haskell/cmdargs:testprog - Build the test program
dev-haskell/comonad:containers - You can disable the use of the `containers` package using `-f-containers`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/comonad:contravariant - You can disable the use of the `contravariant` package using `-f-contravariant`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Contravariant`
dev-haskell/comonad:distributive - You can disable the use of the `distributive` package using `-f-distributive`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Distributive`
dev-haskell/comonad:test-doctests - Run the doctests test suite
dev-haskell/conduit:nohandles - experimental code to use raw system calls in place of handles. Not recommended for general use
dev-haskell/configfile:buildtests - Build the executable to run unit tests.
dev-haskell/contravariant:safe - Get Safe guarantees rather than merely Trustworthy, but with worse constant factors.
dev-haskell/contravariant:semigroups - You can disable the use of the `semigroups` package using `-f-semigroups`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/contravariant:statevar - You can disable the use of the `StateVar` package using `-f-StateVar`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/contravariant:tagged - You can disable the use of the `tagged` package on older versons of GHC using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/cpu:executable - build 'cpuid' tool
dev-haskell/crypto-api:all_cpolys - Build all the CMAC polynomes up to 10000 bits instead of just the usual ones
dev-haskell/crypto-conduit:conduit11 - Use conduit >= 1.1.
dev-haskell/cryptohash:cryptoapi - Defines crypto-api instances
dev-haskell/cryptonite:integer-gmp - Whether or not to use GMP for some functions
dev-haskell/cryptonite:support_aesni - allow compilation with AESNI on system and architecture that supports it
dev-haskell/cryptonite:support_blake2_sse - Use SSE optimized version of BLAKE2
dev-haskell/cryptonite:support_deepseq - add deepseq instances for cryptographic types
dev-haskell/cryptonite:support_pclmuldq - Allow compilation with pclmuldq on architecture that supports it
dev-haskell/cryptonite:support_rdrand - allow compilation with AESNI on system and architecture that supports it
dev-haskell/dav:network-uri - Get Network.URI from the network-uri package.
dev-haskell/distributive:lib-werror - Compile with the ghc -Werror option
dev-haskell/encoding:systemencoding - Provide the getSystemEncoding action to query the locale.
dev-haskell/entropy:halvm - Build for the HaLVM.
dev-haskell/filestore:maxcount - Make use of a recent (>= 2.3.0) Darcs feature which vastly improves the performance of 'latest'. You should disable this flag if you plan to use gitit with an older version of Darcs, or 'latest' will raise an error.
dev-haskell/glib:closure_signals - Use the the GClosure-based signals implementation.
dev-haskell/gtk:deprecated - Include definitions in this library that are considered obsolete.
dev-haskell/gtk:fmode-binary - Set the default file translation mode for file I/O operations to _O_BINARY.
dev-haskell/gtk:gio - Depend on GIO package, thereby enabling certain features.
dev-haskell/gtk2hs-buildtools:closuresignals - Use the the GClosure-based signals implementation.
dev-haskell/gtk3:fmode-binary - Set the default file translation mode for file I/O operations to _O_BINARY.
dev-haskell/gtk3:gio - Depend on GIO package, thereby enabling certain features.
dev-haskell/hackage-security:use-network-uri - Get Network.URI from the network-uri package.
dev-haskell/happstack-server:network-uri - Get Network.URI from the network-uri package
dev-haskell/happstack-server:template_haskell - Description: Template Haskell is available on this system
dev-haskell/hashed-storage:diff - Provide the Storage.Hashed.Diff module.
dev-haskell/hashed-storage:hpc - Compile with the profiling ghc flag -fhpc.
dev-haskell/hashtables:bounds-checking - if on, use bounds-checking array accesses
dev-haskell/hashtables:portable - if on, use only pure Haskell code and no GHC extensions.
dev-haskell/hashtables:unsafe-tricks - turn on unsafe GHC tricks
dev-haskell/haskeline:legacy-encoding - Use legacy iconv encoding for POSIX. This is only intended for testing.
dev-haskell/haskeline:libiconv - Explicitly link against the libiconv library.
dev-haskell/haskeline:terminfo - Use the terminfo package for POSIX consoles.
dev-haskell/hdbc-odbc:buildstresstest - Build stress test
dev-haskell/hdbc-sqlite3:buildtests - Build the executable to run unit tests
dev-haskell/hdbc-sqlite3:splitbase - Choose the new smaller, split-up package.
dev-haskell/highlighting-kate:executable - Build the Highlight executable.
dev-haskell/highlighting-kate:pcre-light - Use the pcre-light library instead of regex-pcre-builtin.
dev-haskell/hit:executable - Build the executable
dev-haskell/hlint:gpl - Use GPL libraries, specifically hscolour.
dev-haskell/hps:build-exec - Build the `hps-fractals' executable
dev-haskell/hs3:network-uri - Get Network.URI from the network-uri package.
dev-haskell/hslogger:buildtests - Build the executable to run unit tests.
dev-haskell/hslua:apicheck - Compile Lua with -DLUA_USE_APICHECK..
dev-haskell/hslua:system-lua - Use the system-wide lua instead of the bundled copy.
dev-haskell/hsopenssl:fast-bignum - Enable fast moving of bignums between OpenSSL and GMP (GHC Only)
dev-haskell/http:conduit10 - Use version 1.0.x or below of the conduit package (for the test suite).
dev-haskell/http:network-uri - Get Network.URI from the network-uri package.
dev-haskell/http-api-data:use-text-show - Use text-show library for efficient ToHttpApiData implementations
dev-haskell/http-client:network-uri - Get Network.URI from the network-uri package.
dev-haskell/http-streams:network-uri - Get Network.URI from the network-uri package.
dev-haskell/httpd-shed:buildexamples - Build example executables.
dev-haskell/httpd-shed:network-uri - Get Network.URI from the network-uri package.
dev-haskell/hxt:network-uri - Get Network.URI from the network-uri package.
dev-haskell/icalendar:network-uri - use network-uri package
dev-haskell/json:generic - Add support for generic encoder (dev-haskell/syb)
dev-haskell/json:mapdict - Encode Haskell maps as JSON dicts
dev-haskell/json:parsec - Add support for parsing with Parsec
dev-haskell/json:pretty - Add support for using pretty printing combinators
dev-haskell/language-dot:executable - Build the `ppdot' executable
dev-haskell/lens:benchmark-uniplate - Enable benchmarking against Neil Mitchell's uniplate library for comparative performance analysis. Defaults to being turned off to avoid the extra dependency.
dev-haskell/lens:dump-splices - Build and run the doctests test-suite.
dev-haskell/lens:inlining - Generate inline pragmas when using template-haskell. This defaults to enabled, but you can to shut it off to benchmark the relative performance impact, or as last ditch effort to address compile errors resulting from the myriad versions of template-haskell that all purport to be 2.8.
dev-haskell/lens:j - Attempt a parallel build with GHC 7.8.
dev-haskell/lens:lib-werror - Turn on ghc-options: -Werror
dev-haskell/lens:old-inline-pragmas - Some 7.6.1-rc1 users report their TH still uses old style inline pragmas. This lets them turn on inlining.
dev-haskell/lens:safe - Disallow unsafeCoerce
dev-haskell/lens:test-doctests - Build and run the doctests test-suite.
dev-haskell/lens:test-hlint - You can disable the hlint test suite with -f-test-hlint
dev-haskell/lens:test-hunit - You can disable the hunit test suite with -f-test-hunit
dev-haskell/lens:test-properties - Build the properties test if we're building tests
dev-haskell/lens:test-templates - Build the test templates if we're building tests
dev-haskell/lens:trustworthy - Assert that we are trustworthy when we can
dev-haskell/lifted-async:monad-control-1 - Use moand-control == 1.*
dev-haskell/linear:template-haskell - You can disable the use of the `template-haskell` package using `-f-template-haskell`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/monad-control:instancest - If enabled this package will export MonadBaseControl instances for the lazy and strict ST monad. If disabled these instances are only exported when base >= 4.4. If enabled it is required that the transformer-base package exports MonadBase instances for ST. It will do this by default.
dev-haskell/monad-logger:template_haskell - Enable Template Haskell support.
dev-haskell/monad-par:chaselev - Use Chase-Lev Deques for higher-perf work-stealing.
dev-haskell/nats:hashable - You can disable the use of the `hashable` package using USE=-hashable. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If set we will not supply an instance of `Hashable`.
dev-haskell/network-data:small_base - Build the split-up base package.
dev-haskell/pandoc-citeproc:bibutils - use Chris Putnam's app-text/bibutils
dev-haskell/pandoc-citeproc:embed_data_files - Embed locale files into the library (needed for windows packaging)
dev-haskell/pandoc-citeproc:hexpat - use dev-haskell/hexpat instead of dev-haskell/xml for XML parsing
dev-haskell/pandoc-citeproc:network - use dev-haskell/network and dev-haskell/http to retrieve CSL file from URIs
dev-haskell/pandoc-citeproc:small_base - Choose the new smaller, split-up base package.
dev-haskell/pandoc-citeproc:test_citeproc - Build the test-citeproc program
dev-haskell/pandoc-citeproc:unicode_collation - Use Haskell bindings to the dev-libs/icu
dev-haskell/persistent:nooverlap - Use OverlappingInstances only for String. Only developers should use this.
dev-haskell/persistent-sqlite:build-sanity-exe - Build a sanity check test executable.
dev-haskell/pointed:comonad - optional instances
dev-haskell/pointed:containers - optional instances
dev-haskell/pointed:kan-extensions - optional instances
dev-haskell/pointed:semigroupoids - optional instances
dev-haskell/pointed:semigroups - optional instances
dev-haskell/pointed:stm - optional instances
dev-haskell/pointed:tagged - optional instances
dev-haskell/pointed:transformers - optional instances
dev-haskell/pointed:unordered-containers - optional instances
dev-haskell/publicsuffixlist:create - export Network.PublicSuffixList.Create module
dev-haskell/publicsuffixlist:runtimelist - read suffix list from dist at startup instead of embedding list into library
dev-haskell/quickcheck:template_haskell - Enable additional test modules requiring Template Haskell support.
dev-haskell/recaptcha:network-uri - Get Network.URI from the network-uri package.
dev-haskell/reflection:template-haskell - Enable template haskell.
dev-haskell/rfc5051:mkunicodedata - build codes generator itself
dev-haskell/sandi:with-conduit - Build with conduit
dev-haskell/scientific:bytestring-builder - Provide the Data.ByteString.Builder.Scientific module (requires bytestring >= 0.10).
dev-haskell/semigroupoid-extras:profunctors - You can disable the use of the `profunctors` package using `-f-profunctors`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroupoids:comonad - You can disable the use of the `comonad` package using `-f-comonad`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Comonad`
dev-haskell/semigroupoids:containers - You can disable the use of the `containers` package using `-f-containers`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroupoids:contravariant - You can disable the use of the `contravariant` package using `-f-contravariant`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Contravariant`
dev-haskell/semigroupoids:distributive - You can disable the use of the `distributive` package using `-f-distributive`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Distributive`
dev-haskell/semigroupoids:tagged - You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:binary - provide instances for binary package
dev-haskell/semigroups:bytestring - You can disable the use of the `bytestring` package using USE=-bytestring. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:containers - You can disable the use of the `containers` package using USE=-containers. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:deepseq - You can disable the use of the `deepseq` package using `-f-deepseq`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:hashable - You can disable the use of the `hashable` package using USE=-hashable. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If set we will not supply an instance of `Hashable`.
dev-haskell/semigroups:text - You can disable the use of the `text` package using USE=-text. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:transformers - provide instances for transformers package.
dev-haskell/semigroups:unordered-containers - You can disable the use of the `unordered-containers` package using USE=-unordered-containers. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/sendfile:portable - Explicitly enable portable sendfile support (implemented in Haskell)
dev-haskell/sha:exe - Build a sha1 and a sha384 executable similar to 'md5sum'.
dev-haskell/shakespeare:test_coffee - Render tests through coffeescript render function.
dev-haskell/shakespeare:test_export - Test export.
dev-haskell/shakespeare:test_roy - Render tests through roy render function.
dev-haskell/shakespeare-js:test_coffee - Test coffee.
dev-haskell/shakespeare-js:test_export - Test export.
dev-haskell/shakespeare-js:test_roy - Test roy.
dev-haskell/shelly:lifted - run the tests against Shelly.Lifted
dev-haskell/shuffle:network-uri - Get Network.URI from the network-uri package.
dev-haskell/simple-sendfile:allow-bsd - Allow use of BSD sendfile (disable on GNU/kFreeBSD)
dev-haskell/skein:big-endian - When manually selecting the endianness, use big-endian (default is little-endian).
dev-haskell/skein:force-endianness - Use a manually selected endian when compiling (see flag 'big-endian').
dev-haskell/skein:reference - Use the reference implementation instead of the optimized one.
dev-haskell/skylighting:executable - Build the skylighting executable.
dev-haskell/snap-core:portable - No non-haskell unportable code.
dev-haskell/snap-server:build-pong - Build a server that just returns "PONG"
dev-haskell/snap-server:openssl - enable https support using dev-haskell/hsopenssl
dev-haskell/snap-server:portable - no non-haskell unportable code.
dev-haskell/tagsoup:download - Build with Download module.
dev-haskell/tagsoup:testprog - Build the test program.
dev-haskell/tasty:colors - Enable colorful output
dev-haskell/tasty-quickcheck:old-quickcheck - Use Quick-Check < 2.7.
dev-haskell/texmath:executable - Compile test executable.
dev-haskell/texmath:network-uri - Get Network.URI from the network-uri package.
dev-haskell/text:developer - operate in developer mode
dev-haskell/thyme:bug-for-bug - bug-for-bug compatibility with time
dev-haskell/thyme:lens - use the full lens package
dev-haskell/thyme:show-internal - instance Show of internal representation
dev-haskell/tls:compat - Accept SSLv2 compatible handshake.
dev-haskell/tls:network - Use the base network library.
dev-haskell/transformers-base:orphaninstances - Build instances for orphan datatypes.
dev-haskell/transformers-compat:three - Use transformers-0.3
dev-haskell/unix-compat:old-time - build against old-time package
dev-haskell/uuagc:bootstrap_external - Use an external uuagc executable for bootstrapping.
dev-haskell/uuagc:with-loag - Use dev-haskell/minisat external SAT-solver to schedule all Linear Ordered AGs.
dev-haskell/vector:boundschecks - Enable bounds checking
dev-haskell/vector:internalchecks - Enable internal consistency checks at the cost of a significant performance penalty
dev-haskell/vector:unsafechecks - Enable bounds checking in unsafe operations at the cost of a significant performance penalty
dev-haskell/vector-algorithms:bench - Build a benchmarking program.
dev-haskell/vector-algorithms:boundschecks - Enable bounds checking.
dev-haskell/vector-algorithms:internalchecks - Enable internal consistency checks at the cost of a significant performance penalty.
dev-haskell/vector-algorithms:properties - Enable quickcheck tests.
dev-haskell/vector-algorithms:unsafechecks - Enable bounds checking in unsafe operations at the cost of a significant performance penalty.
dev-haskell/void:safe - dissable effective but unsafe coersions
dev-haskell/wai-app-static:print - print debug info.
dev-haskell/warp:allow-sendfilefd - Allow use of sendfileFd (not available on GNU/kFreeBSD).
dev-haskell/warp:warp-debug - Add additional debuging information
dev-haskell/x11:screensaver - whether to build XScreenSaver.
dev-haskell/x509-store:executable - Build the executable
dev-haskell/xss-sanitize:network-uri - Get Network.URI from the network-uri package.
dev-haskell/yaml:no-examples - don't build the examples
dev-haskell/yaml:no-exe - don't install the yaml2json executable
dev-haskell/yaml:no-unicode - Don't enable unicode output. Instead, unicode characters will be escaped.
dev-haskell/yaml:system-libyaml - Use system libyaml instead on generic one
dev-haskell/yesod-auth:network-uri - Get Network.URI from the network-uri package
dev-haskell/yesod-form:network-uri - Get Network.URI from the network-uri package
dev-haskell/zip-archive:executable - Build the Zip executable.
dev-haskell/zlib:non-blocking-ffi - Execute FFI calls in the context of haskell thread.
dev-java/ant:antlr - Enable ANTLR Ant tasks
dev-java/ant:bcel - Enable bcel (bytecode manipulation) Ant tasks
dev-java/ant:commonslogging - Enable commons-logging Ant tasks
dev-java/ant:commonsnet - Enable commons-net Ant tasks
dev-java/ant:jai - Enable JAI (Java Imaging) Ant task
dev-java/ant:javamail - Enable JavaMail Ant task
dev-java/ant:jdepend - Enable Jdepend Ant tasks
dev-java/ant:jmf - Enable JMF (Java Media Framework) Ant tasks
dev-java/ant:jsch - Disable Jsch (ssh, scp and related) Ant tasks
dev-java/ant:log4j - Enable Apache log4j Ant tasks
dev-java/ant:oro - Enable Apache Oro Ant tasks
dev-java/ant:regexp - Enable Apache Regexp Ant tasks
dev-java/ant:resolver - Enable Apache Resolver Ant tasks
dev-java/ant:testutil - Enable optional test util classes
dev-java/commons-collections:test-framework - Install the test framework
dev-java/commons-logging:avalon-framework - Add optional support for avalon-framework
dev-java/commons-logging:avalon-logkit - Add optional support for avalon-logkit
dev-java/commons-logging:log4j - Add optional support for log4j
dev-java/commons-logging:servletapi - Add optional support for servletapi
dev-java/ecj-gcj:native - Build a native binary along with the jar. Provides faster execution time, but needs about 1G memory and some patience to compile.
dev-java/eclipse-ecj:ant - Support using ecj in Ant builds via dev-java/ant-eclipse-ecj
dev-java/emma:launcher - Install /usr/bin/emma. Collides with sci-biology/emboss.
dev-java/gcj-jdk:awt - Install AWT libraries, needed by some GUIs (not needed to build icedtea)
dev-java/gnu-classpath:alsa - Build with ALSA javax.sound.midi provider
dev-java/gnu-classpath:dssi - Build with DSSI javax.sound.midi provider
dev-java/gnu-classpath:gconf - Build with GConf preferences backend
dev-java/gnu-classpath:gjdoc - Build GJDoc, a documentation generator
dev-java/gnu-classpath:gmp - Build with GMP backend for java.math.BigInteger
dev-java/gnu-classpath:gstreamer - Build with GStreamer javax.sound.sampler provider
dev-java/gnu-classpath:gtk - Build with Gtk+ AWT peers
dev-java/gnu-classpath:qt4 - Build with Qt4 AWT peers
dev-java/gnu-classpath:xml - Build with native XML backend
dev-java/icedtea:cacao - Use the CACAO virtual machine rather than HotSpot.
dev-java/icedtea:cups - Link against the CUPS library at compile time, rather than using it dynamically at runtime.
dev-java/icedtea:headless-awt - Don't install the X backend for AWT, needed by some GUIs (used to be X flag)
dev-java/icedtea:jamvm - Use the JamVM virtual machine rather than HotSpot.
dev-java/icedtea:jbootstrap - If possible, recompile the final IcedTea executables with itself.
dev-java/icedtea:nsplugin - Enable browser plugin (NPPlugin), requires also the webstart flag to be enabled.
dev-java/icedtea:nss - Enable NSS security provider support.
dev-java/icedtea:pax_kernel - Apply patch needed for pax enabled kernels.
dev-java/icedtea:shenandoah - Include the Shenandoah ultra-low pause time garbage collector (-XX:+UseShenandoahGC) (x86_64 only)
dev-java/icedtea:smartcard - Build the PCSC driver against pcsc-lite
dev-java/icedtea:sunec - Build the SunEC provider against system NSS
dev-java/icedtea:webstart - Enable Web Start support (via NetX).
dev-java/icedtea:zero - Enable Zero assembler port (usually for non-HotSpot architectures)
dev-java/icedtea-bin:headless-awt - Don't install the X backend for AWT, needed by some GUIs (used to be X flag)
dev-java/icedtea-bin:nss - Enable NSS security provider support
dev-java/icedtea-bin:webstart - Provide javaws command through symlink to icedtea-web
dev-java/icedtea-web:javascript - Enable support for using proxy auto config (PAC) files.
dev-java/icedtea-web:nsplugin - Enable the browser plugin (NPPlugin).
dev-java/icedtea-web:tagsoup - Depend on dev-java/tagsoup which allows parsing malformed .jnlp files
dev-java/itext:rtf - Build and provide libraries for rich text format
dev-java/itext:rups - Build and provide GUI for Reading/Updating PDF Syntax
dev-java/jcs:admin - Enable JCS Admin servlets
dev-java/jdbc-mysql:c3p0 - Enable c3p0 support
dev-java/jdbc-mysql:log4j - Enable log4 support
dev-java/jfreesvg:debug - Enable debugging during compilation.
dev-java/jna:awt - Enables support for Java AWT
dev-java/jna:nio-buffers - Enables support for NIO buffers
dev-java/jython:readline - Use GNU readline instead of jline
dev-java/jython:servletapi - Add optional support for servlet-api
dev-java/log4j:javamail - Build the SMTPAppender
dev-java/log4j:jms - Build the JMSAppender
dev-java/logback:tomcat - Builds Apache Tomcat support
dev-java/lucene:contrib - Include extra functionality from contrib/
dev-java/miglayout:swt - Add support for the SWT toolkit.
dev-java/netbeans-nb:keychain - Automatically starts keychain on netbeans start and loads specified keys so Netbeans can use them.
dev-java/oracle-jdk-bin:derby - Enable Installation of Bundled Derby (Java DB)
dev-java/oracle-jdk-bin:jce - Enable Java Cryptographic Extension Unlimited Strength Policy files
dev-java/oracle-jdk-bin:pax_kernel - Use paxctl to mark the JVM binaries.
dev-java/oracle-jre-bin:jce - Enable Java Cryptographic Extension Unlimited Strength Policy files
dev-java/oracle-jre-bin:pax_kernel - Use paxctl to mark the JVM binaries.
dev-java/proguard:ant - Ant task for using ProGuard in build.xml scripts
dev-java/proguard:j2me - Adds support for J2ME Wireless Toolkit
dev-java/protobuf-java:nano - Enable code generator and runtime library designed specifically for resource-constrained systems, like Android
dev-java/rxtx:lfd - Installs and uses LockFileServer daemon (lfd)
dev-java/sbt:binary - Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.
dev-java/swt:webkit - Embedded browser support via net-libs/webkit-gtk:2, replacing former xulrunner-based browser.
dev-lang/bas:lr0 - Use the LR0 parser instead of the recursive descending parser
dev-lang/crystal:blocking-stdio-hack - Keep STDIO file descriptors in blocking mode.
dev-lang/crystal:debug - Build each module as a separate object file. Speeds build up.
dev-lang/crystal:xml - Use the dev-libs/libxml2 library to enable Crystal xml module
dev-lang/crystal:yaml - Use the dev-libs/libyaml library to enable Crystal yaml module
dev-lang/ekopath:mpich - Include pre-built MPICH libraries
dev-lang/ekopath:openmpi - Include pre-built OpenMPI 1.x libraries
dev-lang/ekopath:openmpi2 - Include pre-built OpenMPI 2.x libraries
dev-lang/erlang:compat-ethread - Enable compatibility with pre-pentium 4 CPUs in the ethread library.
dev-lang/erlang:dirty-schedulers - Enable dirty schedulers
dev-lang/erlang:halfword - Enable halfword emulator
dev-lang/erlang:hipe - HIgh Performance Erlang extension
dev-lang/erlang:kpoll - Enable kernel polling support
dev-lang/fpc:ide - Build and install the Free Pascal Compiler IDE
dev-lang/gdl:eigen - Build matrix manipulation with dev-cpp/eigen
dev-lang/gdl:grib - Add support for the meteorological GRIB format with sci-libs/grib_api
dev-lang/gdl:gshhs - Add support for projection adn continent maps with sci-geosciences/gshhs-data
dev-lang/gdl:hdf - Add support for the Hierarchical Data Format v.4
dev-lang/gdl:proj - Add support for sci-libs/proj (geographic projections)
dev-lang/gdl:udunits - Add support for manipulating units of physical quantities
dev-lang/ghc:binary - Install the binary version directly, rather than using it to build the source version.
dev-lang/ghc:ghcbootstrap - Bootstrap from an existing GHC installation.
dev-lang/ghc:ghcmakebinary - Build with less runtime depends (bundle libffi for building bootstrap binaries).
dev-lang/gnat-gcc:acats - Installs ACATS source under LIBPATH.
dev-lang/gnat-gpl:awt - Useful only when building GCJ, this enables Abstract Window Toolkit (AWT) peer support on top of GTK+
dev-lang/gnat-gpl:cilk - Support the Cilk Plus language (C/C++ based languages for parallel programming)
dev-lang/gnat-gpl:fixed-point - Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)
dev-lang/gnat-gpl:go - Build the GCC Go language frontend.
dev-lang/gnat-gpl:graphite - Add support for the framework for loop optimizations based on a polyhedral intermediate representation
dev-lang/gnat-gpl:libssp - Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)
dev-lang/gnat-gpl:mpx - Enable support for Intel Memory Protection Extensions (MPX)
dev-lang/gnat-gpl:nopie - Disable PIE support (NOT FOR GENERAL USE)
dev-lang/gnat-gpl:nossp - Disable SSP support (NOT FOR GENERAL USE)
dev-lang/gnat-gpl:objc - Build support for the Objective C code language
dev-lang/gnat-gpl:objc++ - Build support for the Objective C++ language
dev-lang/gnat-gpl:objc-gc - Build support for the Objective C code language Garbage Collector
dev-lang/gnat-gpl:regression-test - Run the testsuite and install the results (requires FEATURES=test)
dev-lang/gnat-gpl:sanitize - Build support for various sanitizer functions (ASAN/TSAN/etc...)
dev-lang/gnat-gpl:ssp - Build packages with stack smashing protector on by default
dev-lang/gnat-gpl:vtv - Build support for virtual table verification (a C++ hardening feature)
dev-lang/go:gccgo - Enable bootstrapping using gccgo
dev-lang/icon:iplsrc - install the icon programming library source
dev-lang/lazarus:minimal - Don't build extra packages from the bigide component
dev-lang/logtalk:fop - Support for generating pdf documentation using fop
dev-lang/logtalk:gnupl - Support GNU Prolog back-end compiler
dev-lang/logtalk:qupl - Support Qu-Prolog back-end compiler
dev-lang/logtalk:swipl - Support SWI-Prolog back-end compiler
dev-lang/logtalk:xsbpl - Support XSB back-end compiler
dev-lang/logtalk:xslt - Support for generating html documentation using xslt
dev-lang/logtalk:yappl - Support YAP back-end compiler
dev-lang/lua:deprecated - make deprecated data structures/routines available
dev-lang/luajit:lua52compat - Enable some upwards-compatible features from Lua 5.2 that are unlikely to break existing code.
dev-lang/mercury:erlang - Support Mercury Erlang grade
dev-lang/mlton:binary - install a binary version (need to do this once to bootstrap, until smlnj is supported)
dev-lang/moarvm:asan - Enable clang's Address Sanitizer functionality. Expect longer compile time.
dev-lang/moarvm:clang - Use clang compiler instead of GCC
dev-lang/moarvm:jit - Enable Just-In-Time-Compiler. Has no effect except on AMD64 and Darwin.
dev-lang/moarvm:optimize - Enable optimization via CFLAGS
dev-lang/moarvm:ubsan - Enable clang's Undefined Behavior Sanitizer functionality. Expect longer compile time.
dev-lang/mono:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
dev-lang/mono:xen - Make mono generate code that is considerably faster on xen VMs but slightly slower on for normal systems.
dev-lang/nqp:clang - Toggle usage of the clang compiler in conjunction with MoarVM
dev-lang/nqp:moar - Build the MoarVM backend (experimental/broken)
dev-lang/ocaml:flambda - Enables the Flambda optimizer: A new intermediate representation (introduced in ocaml 4.03) in the depths of the compiler designed to allow for better inlining.
dev-lang/ocaml:spacetime - Enables the Spacetime memory profiler. See https://caml.inria.fr/pub/docs/manual-ocaml/spacetime.html for more information.
dev-lang/orc:pax_kernel - Apply patch needed for pax enabled kernels.
dev-lang/perl:ithreads - Enable Perl threads, has some compatibility problems
dev-lang/php:argon2 - Enable password hashing algorithm from app-crypt/argon2
dev-lang/php:cli - Enable CLI SAPI
dev-lang/php:coverage - Include gcov symbols for test coverage and lcov reports. Only useful for extension developers, and requires GCC.
dev-lang/php:embed - Enable embed SAPI
dev-lang/php:enchant - Add supports Enchant spelling library.
dev-lang/php:fileinfo - Add fileinfo extension support
dev-lang/php:filter - Add filter extension support
dev-lang/php:fpm - Enable the FastCGI Process Manager SAPI
dev-lang/php:gd - Adds support for gd (bundled with PHP)
dev-lang/php:hash - Enable the hash extension
dev-lang/php:intl - Enables the intl extension for extended internalization support
dev-lang/php:json - Enable JSON support
dev-lang/php:ldap-sasl - Add SASL support for the PHP LDAP extension
dev-lang/php:libmysqlclient - Use libmyslclient driver for mysql, mysqli, PDO_Mysql (not recommended)
dev-lang/php:lmdb - Enable support for dev-db/lmdb db backend
dev-lang/php:opcache - Enables built-in opcode cache, replacing pecl-apc et al.
dev-lang/php:pdo - Enable the bundled PDO extensions
dev-lang/php:phar - Enables the phar extension to provide phar archive support
dev-lang/php:phpdbg - Enable the PHP Debug Command Line SAPI (like gdb for php)
dev-lang/php:sodium - Enable support for crypto through libsodium
dev-lang/php:tokyocabinet - Enable support for dev-db/tokyocabinet db backend
dev-lang/php:vpx - Enable webp support for GD in php-5.x
dev-lang/php:webp - Enable webp support for GD in php-7.x
dev-lang/php:xmlreader - Enable XMLReader support
dev-lang/php:xmlwriter - Enable XMLWriter support
dev-lang/php:xslt - Enable the XSL extension
dev-lang/php:zip - Enable ZIP file support
dev-lang/php:zip-encryption - Enable ZIP file encryption from dev-libs/libzip
dev-lang/polyml:portable - Build the portable interpreter version of Poly/ML instead of native.
dev-lang/python:threads - Enable threading support. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING)
dev-lang/python:wide-unicode - Enable wide Unicode implementation which uses 4-byte Unicode characters. Switching of this USE flag changes ABI of Python and requires reinstallation of many Python modules. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING)
dev-lang/python:wininst - Install Windows executables required to create an executable installer for MS Windows.
dev-lang/qu-prolog:pedro - Pedro subscription/notification communications system
dev-lang/rakudo:clang - Use Clang to compile the MoarVM backend
dev-lang/rakudo:moar - Use the MoarVM as backend
dev-lang/rubinius:llvm - Build with llvm. Currently the package only builds against old versions of llvm.
dev-lang/ruby:jemalloc - Use dev-libs/jemalloc for memory allocation.
dev-lang/ruby:rdoc - Install dev-ruby/rdoc after installing Ruby.
dev-lang/ruby:readline - Use the sys-libs/readline library to provide the readline extension, used for instance by the irb tool. This flag is meaningful only if the libedit USE flag is disabled. If neither libedit nor readline USE flags are enabled, the readline extension will not be built (and irb will lose line editing functionality).
dev-lang/ruby:rubytests - Install ruby tests that can only be run after ruby is installed
dev-lang/rust:clang - Use sys-devel/clang for building
dev-lang/rust:libcxx - Use sys-libs/libcxx as standard library when building with sys-devel/clang
dev-lang/rust:system-llvm - Use system sys-devel/llvm in place of the bundled one
dev-lang/scala:binary - Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.
dev-lang/spidermonkey:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
dev-lang/spidermonkey:debug - Enable assertions to allow for easier debugging of programs that link to spidermonkey -- note this will often crash software on regular end-user systems
dev-lang/spidermonkey:system-icu - Use the system-wide dev-libs/icu instead of bundled -- note, only takes effect when icu flag is enabled
dev-lang/spidermonkey:threadsafe - Build a threadsafe version of spidermonkey
dev-lang/swi-prolog:archive - Use libarchive for extension packs
dev-lang/swi-prolog:uuid - Use ossp-uuid for UUID pack
dev-lang/swig:ccache - build ccache-swig(a fast compiler cache)
dev-lang/yap:R - Enable support for connecting R to Prolog
dev-libs/DirectFB:bmp - build BMP image provider
dev-libs/DirectFB:divine - enable DiVine
dev-libs/DirectFB:drmkms - build with DRM/KMS support
dev-libs/DirectFB:dynload - enable dynload support
dev-libs/DirectFB:egl - build with EGL support
dev-libs/DirectFB:fusiondale - enable FusionDale
dev-libs/DirectFB:fusionsound - enable FusionSound
dev-libs/DirectFB:gles2 - build gles2 gfxdriver
dev-libs/DirectFB:imlib2 - build Imlib2 image provider
dev-libs/DirectFB:input_hub - provides an asynchronous interface to the input devices available and those being added/removed
dev-libs/DirectFB:mpeg2 - build MPEG2 image provider
dev-libs/DirectFB:mpeg3 - build Libmpeg3 video provider
dev-libs/DirectFB:multicore - enable multicore support
dev-libs/DirectFB:pnm - build PNM (PBM/PGM/PPM) image provider
dev-libs/DirectFB:sawman - enable SaWMan (window manager and application manager)
dev-libs/DirectFB:swfdec - build Swfdec (Flash decoder) video provider
dev-libs/DirectFB:tremor - build Ogg/Vorbis music provider using Tremor
dev-libs/DirectFB:webp - build WebP image provider
dev-libs/ace:ciao - Include Component Intergraced Ace ORB into the build of ace
dev-libs/ace:tao - Include the ACE ORB (CORBA stuff) (called tao) into the build of ace
dev-libs/actor-framework:benchmarks - Due to the number of out-of-tree deps, these only get installed as docs
dev-libs/actor-framework:boost - Make use of Boost's ASIO functionality
dev-libs/actor-framework:cash - Build the C Actor Shell for introspection and debugging
dev-libs/actor-framework:debug - Raises log-level to DEBUG, enables runtime checks and address sanitizer
dev-libs/actor-framework:doc - Compiles and installs the documentation as PDF and HTML
dev-libs/actor-framework:examples - Installs the provided example source files
dev-libs/actor-framework:mem_management - Enables built-in memory management
dev-libs/actor-framework:nexus - Nexus is the central component for CAF's runtime inspection
dev-libs/actor-framework:opencl - Compiles against the provided opencl implementation
dev-libs/actor-framework:riac - Runtime inspection and configuration
dev-libs/actor-framework:static - Provides a static build
dev-libs/actor-framework:test - Builds the provided unit tests
dev-libs/antlr-c:debugger - Compiles debug info into the library
dev-libs/appstream:apt - Enables Debians APT support
dev-libs/appstream-glib:stemmer - Add word stemming via dev-libs/snowball-stemmer.
dev-libs/apr:older-kernels-compatibility - Enable binary compatibility with older kernels
dev-libs/apr:urandom - Use /dev/urandom instead of /dev/random
dev-libs/apr-util:libressl - Use dev-libs/libressl instead of dev-libs/openssl for 'openssl' USE flag
dev-libs/apr-util:nss - Install apr_crypto_nss module
dev-libs/apr-util:openssl - Install apr_crypto_openssl module
dev-libs/beignet:ocl-icd - Enable compatibility with the dev-libs/ocl-icd OpenCL ICD loader
dev-libs/beignet:ocl20 - Enable experimental OpenCL 2.0 support on Skylake and newer architectures
dev-libs/bitset:jemalloc - Use dev-libs/jemalloc for allocations
dev-libs/bitset:tcmalloc - Use tcmalloc from dev-util/google-perftools for allocations
dev-libs/blitz:boost - Enable usage of boost::serialization
dev-libs/boost:context - Build and install the Boost.Context (and Boost.Fiber) library and all other Boost libraries that depend on it
dev-libs/boost:debug - Build and install only the debug version of the Boost libraries. Only enable this flag if you're developing against boost.
dev-libs/boost:doc - Install the full API documentation documentation. This takes over 200MB of extra disk space.
dev-libs/boost:nls - Build libboost_locale. This library requires compatible C library interfaces, which might not be provided by uClibc or other embedded libraries.
dev-libs/boost:threads - Build multi-thread-compatible libraries instead of single-threaded only.
dev-libs/boost:tools - Build and install the boost tools (bcp, quickbook, inspect, wave)
dev-libs/botan:boost - use dev-libs/boost
dev-libs/c-blosc:lz4 - Enable lz4 compression
dev-libs/c-blosc:snappy - Enable snappy compression
dev-libs/c-blosc:zstd - Enable zstd compression
dev-libs/check:subunit - Enable support for the subunit unit test protocol
dev-libs/cyberjack:fox - Enable installation of x11-libs/fox based fxcyberjack program
dev-libs/cyrus-sasl:authdaemond - Add Courier-IMAP authdaemond unix socket support (net-mail/courier-imap, mail-mta/courier)
dev-libs/cyrus-sasl:ldapdb - Enable ldapdb plugin
dev-libs/cyrus-sasl:openldap - Add ldap support for saslauthd
dev-libs/cyrus-sasl:sample - Enable sample client and server
dev-libs/cyrus-sasl:srp - Enable SRP authentication
dev-libs/cyrus-sasl:urandom - Use /dev/urandom instead of /dev/random
dev-libs/dbus-c++:ecore - Use Ecore integration
dev-libs/dbus-c++:glib - Use glib integration
dev-libs/efl:bmp - Enable WBMP image loader
dev-libs/efl:drm - Enable DRM engine
dev-libs/efl:eet - Enable Eet image loader
dev-libs/efl:egl - Enable EGL rendering
dev-libs/efl:fribidi - Enable bidirectional text support
dev-libs/efl:gles - Enable the OpenGL ES GL implementation
dev-libs/efl:glib - Enable dev-libs/glib support
dev-libs/efl:harfbuzz - Enable complex text shaping and layout support
dev-libs/efl:ibus - Enable Intelligent Input Bus
dev-libs/efl:ico - Enable Ico image loader
dev-libs/efl:oldlua - USE dev-lang/lua instead of dev-lang/luajit
dev-libs/efl:physics - Enable Bullet physics effects and support
dev-libs/efl:pixman - Enable PixMan for software rendering
dev-libs/efl:ppm - Enable PMAPS image loader
dev-libs/efl:psd - Enable PSD image loader
dev-libs/efl:scim - Enable Smart Common Input Method
dev-libs/efl:tga - Enable Tga image loader
dev-libs/efl:tslib - Enable x11-libs/tslib for touchscreen events
dev-libs/efl:unwind - Enable debug support via sys-libs/libunwind
dev-libs/efl:valgrind - Enable usage of dev-util/valgrind in debug
dev-libs/efl:webp - Enable WebP image loader
dev-libs/efl:xim - Enable X Input Method
dev-libs/elfutils:lzma - Support automatic decompression of LZMA-compressed files and kernel images
dev-libs/elfutils:threads - Build the libraries with thread safe support
dev-libs/elfutils:utils - Install command-line utilities (all the eu-* programs)
dev-libs/fcgi:html - Install HTML documentation
dev-libs/folks:telepathy - Load contacts from the Telepathy framework
dev-libs/folks:tracker - Load contacts from app-misc/tracker index
dev-libs/folks:utils - Build the folks-inspect utility
dev-libs/folks:zeitgeist - Add support for Zeitgeist event tracking system
dev-libs/fstrm:utils - Build fstrm utility programs
dev-libs/gecode:gist - Enable Gist, the Gecode Interactive Search Tool
dev-libs/gecode:gmp - Enable trigonometric and transcendental float constraints
dev-libs/gf2x:bindist - Disable automatic fine-tuning to local processor features like pclmul or sse2.
dev-libs/gf2x:custom-tune - Extra long compile time for tuning hardware specific low-level routines
dev-libs/gf2x:fft - Build an FFT API for multiplication of 2 polynomials over GF(2)
dev-libs/glib:dbus - Enable dependencies required by glib libraries using dbus service to manage settings saving
dev-libs/glib:mime - Pull in shared MIME database that many glib-based applications require at runtime to detect or open files. Warning: do not disable this flag unless installing on a headless server.
dev-libs/glib:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-libs/glib:utils - Install gtester-report utility to generate test report files for your software; build gresource utility with ELF support.
dev-libs/gmime:smime - Enable experimental S/MIME support
dev-libs/gmp:asm - Enable use of hand optimized assembly routines (faster execution)
dev-libs/gmp:pgo - After building gmp, run some tests against to produce faster libraries -- this option will double the compile time
dev-libs/gobject-introspection:doctool - Install g-ir-doc-tool for generating documentation from introspected data
dev-libs/hidapi:fox - Build a x11-libs/fox GUI
dev-libs/intel-common:compiler - Install the libraries needed for the icc and ifort compilers
dev-libs/jemalloc:stats - Enable statistics calculation/reporting
dev-libs/kreport:marble - Enable displaying of maps using kde-apps/marble
dev-libs/kreport:scripting - Support Qml scripting using dev-qt/qtdeclarative
dev-libs/leveldb:snappy - support the snappy compression library
dev-libs/libRocket:samples - Build samples
dev-libs/libbase58:tools - Build command line base58 tool
dev-libs/libburn:cdio - Enable EXPERIMENTAL use of libcdio as system adapter
dev-libs/libburn:track-src-odirect - Read track input with O_DIRECT (see man 2 open), this may deliver a better write performance in some situations
dev-libs/libcdio:minimal - Only build the libcdio library and little more, just to be used to link against from multimedia players. With this USE flag enabled, none of the command-line utilities are built, nor is the CDDA library.
dev-libs/libcec:cubox - Enable support for enable support for the TDA995x
dev-libs/libcec:exynos - Enable support for Exynos chipsets
dev-libs/libcec:raspberry-pi - Enable support for the Raspberry Pi
dev-libs/libcec:xrandr - Enable detection of active HDMI using xrandr extensions
dev-libs/libcgroup:daemon - Install the configuration tools and init/config files.
dev-libs/libcgroup:tools - Install the cgroup rules processing daemon and init/config files.
dev-libs/libclsync:extra-debug - Enable extra debugging. This will hurt performance badly. Be ready for tons of output.
dev-libs/libclsync:extra-hardened - Enable extra security checks. This may hurt performance.
dev-libs/libdbusmenu:gtk - Enable support for GTK+2
dev-libs/libdbusmenu:gtk3 - Enable support for GTK+3
dev-libs/libdivecomputer:tools - Install tools that can be used to test the library.
dev-libs/libdynd:cuda - Enable NVIDIA CUDA toolkit support
dev-libs/libdynd:mkl - Enable a plugin for Intel Math Kernel Library sci-libs/mkl
dev-libs/libevent:debug - Support runtime debug mode and malloc hooks (for programmers)
dev-libs/libffi:pax_kernel - Use PaX emulated trampolines, for we can't use PROT_EXEC
dev-libs/libflatarray:cuda - Enables plugins for NVIDIA GPUs (e.g. CUDAAllocator)
dev-libs/libgdata:gnome-online-accounts - Enable net-libs/gnome-online-accounts support
dev-libs/libgit2:gssapi - Enable GSSAPI support for SPNEGO auth
dev-libs/libgit2:ssh - Enable SSH transport support
dev-libs/libgit2:trace - Enable tracing support
dev-libs/libgit2-glib:ssh - Enable SSH transport support
dev-libs/libgpg-error:common-lisp - Install common-lisp files
dev-libs/libgpuarray:cuda - Enable NVIDIA CUDA toolkit support
dev-libs/libgpuarray:opencl - Enable OpenCL support
dev-libs/libgweather:glade - Installs catalog files for dev-util/glade
dev-libs/libindicate:introspection - Use dev-libs/gobject-introspection for introspection
dev-libs/libisoburn:cdio - Enable EXPERIMENTAL use of libcdio as system adapter
dev-libs/libisoburn:external-filters - Allow the use of external processes as file content filters (Note: this is a potential security risk)
dev-libs/libisoburn:external-filters-setuid - Also allow the use of external setuid processes as file content filters (Note: this is a potential security risk)
dev-libs/libisoburn:frontend-optional - Use dev-tcltk/bwidget which is not strictly required for the frontend
dev-libs/libisoburn:launch-frontend - Enable the tcl gui for xorriso
dev-libs/libisoburn:launch-frontend-setuid - Enable the tcl gui for xorriso under setuid
dev-libs/libisofs:verbose-debug - Enable verbose debug messages
dev-libs/liblogging:rfc3195 - Enables RFC 3195 protocol (aka syslog-reliable) support. If you don't know what this is, you don't need it!
dev-libs/liblogging:stdlog - Enables liblogging's core component (think of it as a the next version of the syslog(3) API).
dev-libs/libmail:apop - Enables the APOP authentication method
dev-libs/libmateweather:gtk3 - Build with GTK+3 instead of GTK+2
dev-libs/libmemcached:hsieh - Use Hsieh hash algorithm.
dev-libs/libmemcached:libevent - Use the libevent event loop interface.
dev-libs/libmemcached:sasl - Use sasl auth for communications.
dev-libs/libnfc:pcsc-lite - Enable NFC drivers that require pcsc-lite
dev-libs/libnl:doc - Install development documentation
dev-libs/libnl:python - Install experimental dev-lang/python bindings
dev-libs/libnl:utils - Install command line interface utils
dev-libs/liborcus:spreadsheet-model - Enable the spreadsheet model implementation
dev-libs/liborcus:tools - Build various low-level parsers
dev-libs/libowfat:diet - Compile against dev-libs/dietlibc
dev-libs/libp11:doc - Generate and install API documentation for the package.
dev-libs/libpcre:bzip2 - Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).
dev-libs/libpcre:pcre16 - Build PCRE library for 16 bit characters (e.g. UTF-16).
dev-libs/libpcre:pcre32 - Build PCRE library for 32 bit characters (e.g. UTF-32).
dev-libs/libpcre:readline - Add support for command line editing to pcretest, through sys-libs/readline.
dev-libs/libpcre:recursion-limit - Limit match recursion to 8192; if disabled, the default limit is used, which is the same as the match limit.
dev-libs/libpcre:zlib - Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).
dev-libs/libpcre2:bzip2 - Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).
dev-libs/libpcre2:pcre16 - Build PCRE library for 16 bit characters (e.g. UTF-16).
dev-libs/libpcre2:pcre32 - Build PCRE library for 32 bit characters (e.g. UTF-32).
dev-libs/libpcre2:readline - Add support for command line editing to pcretest, through sys-libs/readline.
dev-libs/libpcre2:recursion-limit - Limit match recursion to 8192; if disabled, the default limit is used, which is the same as the match limit.
dev-libs/libpcre2:zlib - Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).
dev-libs/libpeas:glade - Install the glade catalog
dev-libs/libpeas:python - Build support for loading dev-lang/python plugins
dev-libs/librdkafka:lz4 - Enable support for Kafka's LZ4 compression based on KIP-57 (uses app-arch/lz4)
dev-libs/libressl:asm - Enables assembly
dev-libs/libsecp256k1:asm - Enable x86_64 assembly optimisation
dev-libs/libsecp256k1:ecdh - Enable ECDH shared secret computation
dev-libs/libsecp256k1:endomorphism - Enable endomorphism
dev-libs/libsecp256k1:experimental - Allow experimental USE flags
dev-libs/libsecp256k1:recovery - Enable ECDSA pubkey recovery module
dev-libs/libsecp256k1:schnorr - Enable Schnorr signature module
dev-libs/libsecp256k1:test_openssl - Enable OpenSSL comparison tests
dev-libs/libslz:tools - Install additional tools (zenc, zdec)
dev-libs/libsodium:asm - Enables assembly implementations
dev-libs/libsodium:urandom - Use /dev/urandom instead of /dev/random
dev-libs/libsolv:rpm - Enable support for RPM files
dev-libs/libsqlora8:orathreads - Use Oracle threads
dev-libs/libtasn1:valgrind - Enable usage of dev-util/valgrind in debug
dev-libs/libtermkey:demos - Install demos, which pulls in dev-libs/glib
dev-libs/libucl:regex - Enable regex checking for schema
dev-libs/libucl:signatures - Enable signatures check
dev-libs/libucl:urlfetch - Enable URLs fetch
dev-libs/libucl:utils - Install the chargen and objdump utilities
dev-libs/libverto:glib - Support event loops using dev-libs/glib
dev-libs/libverto:libev - Support event loops using dev-libs/libev
dev-libs/libverto:libevent - Support event loops using dev-libs/libevent
dev-libs/libverto:tevent - Support event loops using sys-libs/tevent
dev-libs/link-grammar:aspell - Adds support for app-text/aspell spell checker
dev-libs/link-grammar:hunspell - Adds support for app-text/hunspell spell checker
dev-libs/log4cplus:iconv - Use inconv for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cplus:working-c-locale - Use the C99 locale facilities for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cplus:working-locale - Use C++'s std::locale for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cxx:smtp - Offer SMTP support via net-libs/libesmtp
dev-libs/m17n-lib:X - Build the Graphical User Interface API and utilities
dev-libs/m17n-lib:anthy - Enable support for app-i18n/anthy input method
dev-libs/m17n-lib:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
dev-libs/m17n-lib:gd - Build API and utilities based on media-libs/gd. This flag is only meaningful if the X USE flag is also enabled.
dev-libs/m17n-lib:libotf - Use dev-libs/libotf to handle OpenType fonts
dev-libs/m17n-lib:libxml2 - Use dev-libs/libxml2 to parse XML
dev-libs/nss:cacert - Include root/class3 certs from CAcert (http://www.cacert.org/)
dev-libs/nss:nss-pem - Add support for libnsspem
dev-libs/nss:utils - Install utilities included with the library
dev-libs/oniguruma:combination-explosion-check - enable combination explosion check
dev-libs/oniguruma:crnl-as-line-terminator - enable CR+NL as line terminator
dev-libs/opencryptoki:tpm - Enable support for Trusted Platform Module (TPM) using app-crypt/trousers
dev-libs/openct:debug - Add debug output to the driver library for pcsc-lite.
dev-libs/openct:pcsc-lite - Build a driver library for sys-apps/pcsc-lite, providing PC/SC API access to devices supported by OpenCT.
dev-libs/openct:udev - Install rules for sys-fs/udev to auto-start openct.
dev-libs/openobex:irda - Enable IrDA support
dev-libs/opensc:ctapi - Use CT-API for accessing Smartcard hardware.
dev-libs/opensc:openct - Use dev-libs/openct (and CT-API) for accessing Smartcard hardware.
dev-libs/opensc:pcsc-lite - Use sys-apps/pcsc-lite (and PC/SC API) for accessing Smartcard hardware.
dev-libs/opensc:secure-messaging - Enable secure messaging.
dev-libs/openssl:asm - Support assembly hand optimized crypto functions (i.e. faster run time)
dev-libs/openssl:bindist - Disable EC algorithms (as they seem to be patented) -- note: changes the ABI
dev-libs/openssl:rfc3779 - Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers)
dev-libs/openssl:sslv2 - Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https
dev-libs/openssl:sslv3 - Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https
dev-libs/openssl:tls-heartbeat - Enable the Heartbeat Extension in TLS and DTLS
dev-libs/pkcs11-helper:nss - Enable NSS crypto engine
dev-libs/poco:7z - Add Support for the 7z archive format
dev-libs/poco:apache - Enable support to write Apache modules using POCO
dev-libs/poco:cppparser - Build and install a minimal C++ parser
dev-libs/poco:crypto - Encryption and digital signing classes
dev-libs/poco:data - Database abstraction layer to easily send/retrieve data to/from various databases
dev-libs/poco:file2pagecompiler - Utility to convert ordinary files to Page Compiler source files
dev-libs/poco:json - Add JSON support
dev-libs/poco:mongodb - Add dev-db/mongodb support
dev-libs/poco:net - Classes to write network clients & servers
dev-libs/poco:pagecompiler - Simple compiler translating HTML pages containing embedded C++ code into HTTPRequestHandler classes
dev-libs/poco:pocodoc - POCO documentation generator
dev-libs/poco:util - Several utility classes (like logger, timer, config file parser)
dev-libs/poco:zip - Add support for the zip & gz archive formats
dev-libs/ppl:lpsol - Build the ppl_lpsol linear programming problem solver
dev-libs/protobuf:java - Builds the Java implementation. This is not needed for Java support in protoc.
dev-libs/protobuf:python - Builds the Python implementation. This is not needed for Python support in protoc.
dev-libs/softhsm:migration-tool - Build db migration tool
dev-libs/starpu:cuda - Enable NVIDIA CUDA toolkit support
dev-libs/starpu:gcc-plugin - Enable GCC extension plugin (experimental)
dev-libs/starpu:opencl - Enable OpenCL support
dev-libs/sway:gdk-pixbuf - Enable additional image format support via the x11-libs/gdk-pixbuf library.
dev-libs/sway:swaybar - Build 'swaybar': sway's status bar component.
dev-libs/sway:swaybg - Build 'swaybg': allows to set a desktop background image.
dev-libs/sway:swaygrab - Build 'swaygrab': allows taking screenshots or screencasts.
dev-libs/sway:swaylock - Build 'swaylock': sway's screen locker.
dev-libs/sway:swaymsg - Build 'swaymsg': tool for communicating with a running sway instance.
dev-libs/sway:tray - Enable support for StatusNotifierItem tray specification.
dev-libs/sway:wallpapers - Install sway's default wallpaper image.
dev-libs/tinyxml:stl - Compile with TIXML_USE_STL support
dev-libs/tntnet:server - Enable tntnet server daemon
dev-libs/totem-pl-parser:archive - Enables support for accessing media files in archives transparently via app-arch/libarchive
dev-libs/totem-pl-parser:quvi - Use media-libs/libquvi for parsing video links
dev-libs/ucommon:socks - Build with socks proxy support
dev-libs/userspace-rcu:regression-test - Run regression tests (requires FEATURES=test)
dev-libs/ustr:ustr-import - Install ustr-import developer program and source code for bundling.
dev-libs/weston:colord - Allow setting color managment
dev-libs/weston:drm - Enable drm compositor support
dev-libs/weston:editor - Install wayland-editor example application
dev-libs/weston:fbdev - Enable fbdev compositor support
dev-libs/weston:gles2 - Use GLESv2 cairo instead of full GL
dev-libs/weston:headless - Headless backend and a noop renderer, mainly for testing purposes
dev-libs/weston:ivi - Enable the IVI shell
dev-libs/weston:launch - Install weston-launch utility
dev-libs/weston:rdp - Enable Remote Desktop Protocol compositor support
dev-libs/weston:resize-optimization - Increase performance, allocate more RAM. Recommended to disable on Raspberry Pi
dev-libs/weston:rpi - Raspberry Pi GPU support
dev-libs/weston:screen-sharing - Enable screen-sharing through RDP
dev-libs/weston:unwind - Enable libunwind usage for backtraces
dev-libs/weston:wayland-compositor - Enable Wayland compositor support
dev-libs/weston:webp - Add support for the WebP image format
dev-libs/weston:xwayland - Enable ability support native X11 applications
dev-libs/wlc:X - Enable X11 backend.
dev-libs/wlc:systemd - Enable support for systemd-logind.
dev-libs/wlc:xwayland - Enable XWayland application support.
dev-libs/xapian:brass - Enabled brass backend db support
dev-libs/xapian:chert - Enabled chert backend db support
dev-libs/xapian:glass - Enabled glass backend db support
dev-libs/xapian:inmemory - Enabled inmemory backend db support
dev-libs/xerces-c:iconv - Use iconv (virtual/libiconv) as message loader and transcoder (in general it would be possible to use iconv only as message loader and something else like icu or the native method as transcoder and vice-versa, but this is a less common case and hard to handle)
dev-libs/xerces-c:threads - Enable threading support through pthread (or other libraries on AIX, IRIX, HPUX, Solars). Highly recommended
dev-libs/xml-security-c:nss - Use dev-libs/nss for certain crypto operations (configureable at runtime)
dev-libs/xml-security-c:xalan - Enable support for XSLT and XPath parsing by dev-libs/xalan-c
dev-libs/xmlrpc-c:abyss - Build the Abyss mini web-server.
dev-libs/xmlrpc-c:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal expat library.
dev-libs/xmlrpc-c:threads - Controls whether to build the Abyss web-server with pthreads or fork 'threading'.
dev-libs/xmlrpc-c:tools - Build the xmlrpc* tools.
dev-libs/xmlsec:gcrypt - Install xmlsec-gcrypt library
dev-libs/xmlsec:gnutls - Install xmlsec-gnutls library
dev-libs/xmlsec:nss - Install xmlsec-nss library
dev-libs/xmlsec:openssl - Install xmlsec-openssl library
dev-libs/xqilla:faxpp - Use dev-libs/faxpp instead of Xerces-C for certain tasks
dev-libs/xqilla:htmltidy - Use app-text/htmltidy when parsing HTML
dev-libs/yaz:ziffy - Install ziffy, a promiscuous Z39.50 APDU sniffer
dev-lisp/abcl:clisp - Build Armed Bear Common Lisp using GNU CLISP
dev-lisp/abcl:cmucl - Build Armed Bear Common Lisp using CMU Common Lisp
dev-lisp/abcl:jad - Enable support for disassembling compiled code using JAD
dev-lisp/clisp:hyperspec - Use local hyperspec instead of online version
dev-lisp/clisp:new-clx - Build CLISP with support for the NEW-CLX module which is a C binding to the Xorg libraries
dev-lisp/clisp:pari - Build CLISP with support for the PARI Computer Algebra System
dev-lisp/clisp:svm - Build CLISP with support for the Support Vector Machine module
dev-lisp/clx:doc - Builds documentation
dev-lisp/cmucl:source - Include source code for CMUCL in installation
dev-lisp/ecls:gengc - Use generational garbage collection (experimental)
dev-lisp/ecls:libatomic - Use dev-libs/libatomic_ops library
dev-lisp/ecls:precisegc - Use type information during garbage collection (experimental)
dev-lisp/gcl:ansi - Build a GCL with ANSI support (else build a traditional CLtL1 image)
dev-lisp/gcl:athena - Build xgcl - an interface to x11-libs/libXaw
dev-lisp/sbcl:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
dev-lua/lpeg:luajit - Use dev-lang/luajit instead of dev-lang/lua
dev-lua/lua-openssl:luajit - Use dev-lang/luajit instead of dev-lang/lua
dev-lua/luafilesystem:luajit - Use dev-lang/luajit instead of dev-lang/lua
dev-lua/luaossl:luajit - Use dev-lang/luajit instead of dev-lang/lua
dev-lua/luarocks:curl - Uses net-misc/curl for fetching lua packages instead of net-misc/wget.
dev-lua/luarocks:openssl - Uses dev-libs/openssl for verifying lua packages instead of md5sum.
dev-lua/luvit:bundled-libs - Use bundled versions of some libraries.
dev-lua/messagepack:luajit - Use the lua just-in-time compiler dev-lang/luajit instead of dev-lang/lua
dev-lua/mpack:luajit - Use dev-lang/luajit instead of dev-lang/lua
dev-ml/angstrom:async - Enable dev-ml/async bindings for asynchronous API.
dev-ml/angstrom:lwt - Enable dev-ml/lwt bindings for asynchronous API.
dev-ml/cairo-ocaml:pango - Enable support for x11-libs/pango
dev-ml/csv:lwt - Enables the Lwt-based library for asynchronous operations.
dev-ml/dose3:parmap - Adds multi-core CPU support via dev-ml/parmap.
dev-ml/dose3:rpm4 - Adds support for handling rpm4 files.
dev-ml/dose3:zip - Adds support for handling zip files.
dev-ml/eliom:ppx - Enable PPX syntax extension support.
dev-ml/js_of_ocaml:camlp4 - Build with camlp4 syntax extensions.
dev-ml/js_of_ocaml:deriving - Enable dev-ml/deriving support for improving the type safety.
dev-ml/js_of_ocaml:lwt - Enable dev-ml/lwt support.
dev-ml/js_of_ocaml:ppx - Enables the ppx syntax extension
dev-ml/js_of_ocaml:react - Enable functionnal reactive programming support.
dev-ml/lablgtk:glade - Enable libglade bindings compilation.
dev-ml/lablgtk:gnomecanvas - Enable libgnomecanvas bindings compilation.
dev-ml/lablgtk:sourceview - Enable GtkSourceView support
dev-ml/logs:cli - Enables the Logs_cli library that provides command line support for controlling Logs.
dev-ml/logs:fmt - Enables the Logs_fmt reporter.
dev-ml/logs:lwt - Enables the Logs_lwt library that provides Lwt logging functions.
dev-ml/lwt:camlp4 - Enable camlp4 syntax extension
dev-ml/lwt:libev - Enable the dev-libs/libev-based backend.
dev-ml/lwt:ppx - Enables the ppx syntax extension
dev-ml/ocaml-cohttp:async - Enables support for the dev-ml/async asynchronous execution library.
dev-ml/ocaml-cohttp:lwt - Enables support for the dev-ml/lwt cooperative light-weight thread library.
dev-ml/ocaml-cstruct:async - Support for asynchronous execution
dev-ml/ocaml-cstruct:lwt - Enable threads via lwt
dev-ml/ocaml-cstruct:ppx - Enable the ppx syntax extension
dev-ml/ocaml-dns:async - support for asynchronous execution
dev-ml/ocaml-dns:lwt - enable threads via lwt
dev-ml/ocaml-websocket:async - Enables support for the dev-ml/async asynchronous execution library.
dev-ml/ocaml-websocket:lwt - Enables support for the dev-ml/lwt cooperative light-weight thread library.
dev-ml/ocamlnet:httpd - Enables net-httpd web server component
dev-ml/ocamlnet:zip - Enables netzip support to read/write gzip data using object channels
dev-ml/onanomsg:lwt - Enables lwt support.
dev-ml/pgocaml:camlp4 - Enable PG'Ocaml syntax extension.
dev-ml/tyxml:camlp4 - Enables the camlp4 syntax extension (deprecated)
dev-ml/tyxml:ppx - Enables the ppx syntax extension (preferred)
dev-ml/uutf:utftrip - Builds and install the utftrip executable: Among other things, reads unicode on stdin and rewrites it on stdout.
dev-ml/zarith:mpir - Use MPIR library instead of GMP.
dev-perl/App-Nopaste:clipboard - copying of URLs with -x/--copy
dev-perl/App-Nopaste:github - Github authentication
dev-perl/App-Nopaste:pastebin - pastebin.com support
dev-perl/Business-ISBN:barcode - Install dev-perl/GD-Barcode for rendering ISBN numbers as barcodes
dev-perl/Business-ISBN:xisbn - Install dev-perl/Mojolicious for querying xisbn.worldcat.org
dev-perl/Convert-UUlib:system-uulib - Use dev-libs/uulib instead of bundled version.
dev-perl/DBD-SQLite:system-sqlite - Use the system-wide dev-db/sqlite installation
dev-perl/DBD-mysql:embedded - Support embedded server (libmysqld)
dev-perl/DBD-mysql:ssl - Compile in support for SSL connections via libmysqlclient
dev-perl/DBIx-Class:admin - Modules required for the DBIx::Class administrative library
dev-perl/DBIx-Class:admin_script - Modules required for the CLI DBIx::Class interface dbicadmin
dev-perl/DBIx-Class:deploy - Modules required for "deploy" in DBIx::Class::Storage::DBI and "deploymen_statements" in DBIx::Class::Storage::DBI
dev-perl/DBIx-Class:replicated - Modules required for DBIx::Class::Storage::DBI::Replicated
dev-perl/File-HomeDir:xdg - Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs
dev-perl/File-Which:pwhich - Install dev-perl/App-pwhich which used to be a part of this package
dev-perl/GD:animgif - Enable animated gif support
dev-perl/Graphics-ColorNames:recommended - Install recommended support modules
dev-perl/HTML-Mason:modperl - Enable www-apache/mod_perl support
dev-perl/HTTP-Entity-Parser:xs - Install C-Based dependieces for faster performance
dev-perl/Lab-Measurement:xpression - Install the Xpression measurement framework
dev-perl/Mail-IMAPClient:md5 - Install support for DIGEST-MD5 and CRAM-MD5 Authentication
dev-perl/Mail-IMAPClient:ntlm - Install support for NTLM Authentication
dev-perl/Mail-IMAPClient:ssl - Install support for SSL Connections
dev-perl/Mail-IMAPClient:zlib - Install support for COMPRESS DEFLATE connections
dev-perl/Net-OpenSSH:sftp - Enable SFTP protocol support.
dev-perl/Net-SSH2:gcrypt - Use libgcrypt instead of openssl
dev-perl/PDL:badval - Enable bad values support
dev-perl/PDL:hdf - Enable HDF (version 4) format support
dev-perl/PDL:netpbm - Enable NETPBM and MPEG support
dev-perl/PDL:pdl2 - Build pdf2 shell (requires Devel-REPL)
dev-perl/PDL:pgplot - Enable PGPLOT plotting capabilities
dev-perl/PDL:plplot - Enable plplot plotting capabilities
dev-perl/Panotools-Script:gui - Installs GUIs for some tools
dev-perl/Sub-Name:suggested - Install extra dependencies needed for extended regression tests
dev-perl/Sysadm-Install:hammer - Enable hammer() funtion to run a command in the shell and simulate a user hammering the ENTER key to accept defaults on prompts
dev-perl/Test-Warnings:suggested - Install optional dependencies for extra tests
dev-perl/WWW-Form-UrlEncoded:xs - Install C-Based dependieces for faster performance
dev-perl/perl-headers:debug - Add source locations in generated .ph files to assist with debugging when errors occur
dev-perl/perl-headers:sizeof-warning - Include logic to warn when a .ph file tries to use a sizeof() that is unknown
dev-php/PEAR-HTTP_Download:minimal - Do not include support for PEAR-MIME_Type
dev-php/PEAR-HTTP_Download:postgres - Send postgres LOBs without buffering
dev-php/PEAR-HTTP_Request2:curl - Force dev-lang/php to be compiled with curl extension
dev-php/PEAR-HTTP_Request2:fileinfo - Force dev-lang/php to be compiled with fileinfo extension
dev-php/PEAR-HTTP_Request2:ssl - Force dev-lang/php to be compiled with ssl extension
dev-php/PEAR-HTTP_Request2:zlib - Force dev-lang/php to be compiled with zlib extension
dev-php/PEAR-PHP_Beautifier:cli - Require dev-lang/php to be built with the "cli" SAPI and install the php_beautifier script.
dev-php/ZendFramework:cli - Enables the CLI
dev-php/ZendFramework:doc - Installs the documentation
dev-php/ZendFramework:examples - Installs the examples
dev-php/ZendFramework:minimal - Installs the minimal version without Dojo toolkit, tests and demos
dev-php/agavi:executable - Install the "agavi" executable used to manage projects. This requires dev-php/phing, and may be omitted if you are (for example) deploying an existing site to a production server.
dev-php/pecl-apcu:lock_pthreadmutex - Enable pthread mutex locking
dev-php/pecl-apcu:lock_pthreadrw - Enable pthread read/write locking
dev-php/pecl-apcu:lock_semaphore - Enable semaphore locks instead of fcntl
dev-php/pecl-apcu:lock_spinlock - Enable spin locks (EXPERIMENTAL)
dev-php/pecl-event:extra - Add support of the Libevent extra API
dev-php/pecl-memcached:igbinary - Enable support for the igbinary serializer
dev-php/pecl-memcached:json - Enable support for json serialization
dev-php/pecl-mysqlnd_qc:memcached - Use dev-libs/libmemcached as a storage handler
dev-php/pecl-mysqlnd_qc:sqlite - Use dev-db/sqlite as a storage handler
dev-php/pecl-redis:igbinary - Enables igbinary serialisation support
dev-php/pecl-zmq:czmq - Use the czmq high level bindings
dev-php/phing:zip - Support zip archives by requiring said support in dev-lang/php.
dev-php/twig:extension - Build the C extension (only for php-5.6.x).
dev-python/Kivy:camera - Install libraries needed to support camera
dev-python/Kivy:garden - Install garden tool to manage user maintained widgets
dev-python/PyFoam:extras - Enable optional dependencies
dev-python/PyQt4:X - Build bindings for the QtGui module
dev-python/PyQt4:compat - Install the deprecated pyqtconfig module for backward compatibility
dev-python/PyQt4:dbus - Build bindings for the QtDBus module
dev-python/PyQt4:declarative - Build bindings for the QtDeclarative module
dev-python/PyQt4:designer - Build bindings for the QtDesigner module and enable the designer plugin
dev-python/PyQt4:help - Build bindings for the QtHelp module
dev-python/PyQt4:kde - Select media-libs/phonon as Phonon variant (needed for KDE)
dev-python/PyQt4:multimedia - Build bindings for the QtMultimedia module
dev-python/PyQt4:opengl - Build bindings for the QtOpenGL module
dev-python/PyQt4:phonon - Build bindings for the phonon module
dev-python/PyQt4:script - Build bindings for the QtScript module
dev-python/PyQt4:scripttools - Build bindings for the QtScriptTools module
dev-python/PyQt4:sql - Build bindings for the QtSql module
dev-python/PyQt4:svg - Build bindings for the QtSvg module
dev-python/PyQt4:testlib - Build bindings for the QtTest module
dev-python/PyQt4:webkit - Build bindings for the QtWebKit module
dev-python/PyQt4:xmlpatterns - Build bindings for the QtXmlPatterns module
dev-python/PyQt5:bluetooth - Build bindings for the QtBluetooth module
dev-python/PyQt5:dbus - Build bindings for the QtDBus module
dev-python/PyQt5:declarative - Build bindings for the QtQml/QtQuick modules and enable the qmlscene plugin
dev-python/PyQt5:designer - Build bindings for the QtDesigner module and enable the designer plugin
dev-python/PyQt5:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-python/PyQt5:gui - Build bindings for the QtGui module
dev-python/PyQt5:help - Build bindings for the QtHelp module
dev-python/PyQt5:location - Build bindings for the QtLocation module
dev-python/PyQt5:multimedia - Build bindings for the QtMultimedia module
dev-python/PyQt5:network - Build bindings for the QtNetwork module
dev-python/PyQt5:opengl - Build bindings for the QtOpenGL module
dev-python/PyQt5:positioning - Build bindings for the QtPositioning module
dev-python/PyQt5:printsupport - Build bindings for the QtPrintSupport module
dev-python/PyQt5:sensors - Build bindings for the QtSensors module
dev-python/PyQt5:serialport - Build bindings for the QtSerialPort module
dev-python/PyQt5:sql - Build bindings for the QtSql module
dev-python/PyQt5:svg - Build bindings for the QtSvg module
dev-python/PyQt5:testlib - Build bindings for the QtTest module
dev-python/PyQt5:webchannel - Build bindings for the QtWebChannel module
dev-python/PyQt5:webengine - Build bindings for the QtWebEngine module
dev-python/PyQt5:webkit - Build bindings for the QtWebKit module
dev-python/PyQt5:websockets - Build bindings for the QtWebSockets module
dev-python/PyQt5:widgets - Build bindings for the QtWidgets module
dev-python/PyQt5:x11extras - Build bindings for the QtX11Extras module
dev-python/PyQt5:xmlpatterns - Build bindings for the QtXmlPatterns module
dev-python/PythonQt:extensions - Install extensions
dev-python/QtPy:designer - Build bindings for the QtDesigner module and enable the designer plugin
dev-python/QtPy:gui - Build bindings for the QtGui module
dev-python/QtPy:svg - Build bindings for the QtSvg module
dev-python/QtPy:testlib - Build bindings for the QtTest module
dev-python/QtPy:webkit - Build bindings for the QtWebKit module
dev-python/amqplib:extras - Install extra tools to generate initial Python mod from an AMQP XML file
dev-python/anyvc:bazaar - Add support for Bazaar
dev-python/anyvc:mercurial - Add support for Mercurial
dev-python/celery:redis - Enables redis support
dev-python/celery:sqs - Enables Amazon SQS transport module for celery
dev-python/celery:yaml - Enable support of yaml as a configuration file format
dev-python/celery:zeromq - Enable logging and deployment via ZeroMQ
dev-python/cgkit:3ds - Enable support for importing 3D Studio models
dev-python/clize:datetime - Add support for datetime arguments parsing
dev-python/cvxopt:dsdp - Use interior point library sci-libs/dsdp
dev-python/cvxopt:glpk - Use GNU Linear Programming Kit sci-mathematics/glpk
dev-python/dap:server - Enable OpenDAP server support
dev-python/django-cms:admin-style - Install plugin customizing admin panel styles
dev-python/django-cms:ckeditor - Install text-ckeditor plugin for rich text editing
dev-python/django-cms:file - Install djangocms file plugin
dev-python/django-cms:flash - Install djangocms flash plugin
dev-python/django-cms:inherit - Install djangocms inherit plugin
dev-python/django-cms:link - Install djangocms link plugin
dev-python/django-cms:picture - Install djangocms picture plugin
dev-python/django-cms:snippet - Install djangocms snippet plugin
dev-python/django-cms:teaser - Install djangocms teaser plugin
dev-python/django-cms:video - Install djangocms video plugin
dev-python/django-tastypie:bip - An optional serialiser dev-python/biplist
dev-python/django-tastypie:digest - Library to aid in implementing HTTP Digest Authentication
dev-python/django-tastypie:lxml - An optional serialiser dev-python/lxml
dev-python/django-tastypie:yaml - An optional serialiser dev-python/yaml
dev-python/django-two-factor-auth:yubikey - Adds support for Yubikeys via django-otp-yubikey
dev-python/editorconfig-core-py:cli - Install command line interface as well as python library
dev-python/falcon:cython - Build cython-based python modules
dev-python/flask-restful:paging - Enable resource paging support
dev-python/geopy:timezone - Enables localized date support
dev-python/geopy:yahoo - Enables use of YahooPlaceFinder
dev-python/glance_store:cinder - adds cinder backend support
dev-python/gmpy:mpir - Use sci-libs/mpir as gmp implementation
dev-python/icalendar:doc - Generate examples and other extra documentation
dev-python/ipython:matplotlib - Add support for dev-python/matplotlib
dev-python/ipython:mongodb - Enable support for MongoDB via dev-python/pymongo
dev-python/ipython:nbconvert - Enable support for converting notebooks to various formats using app-text/pandoc
dev-python/ipython:notebook - Install requirements for the web notebook based on www-servers/tornado
dev-python/ipython:octave - Enable octave bridge via dev-python/oct2py
dev-python/jira:filemagic - Include filemagic support (for identifying uploaded filetypes)
dev-python/jira:ipython - Include Interactive Python (IPython)
dev-python/jira:oauth - Support OAuth authentication
dev-python/kaa-base:tls - SSL/TLS support via dev-python/tlslite
dev-python/kafka-python:snappy - Install snappy compression/decompression support
dev-python/kazoo:gevent - Enable support for the gevent based handler
dev-python/kombu:amqplib - Enable amqplib support
dev-python/kombu:msgpack - Enables MessagePack (de)serializer for Python
dev-python/kombu:sqs - Enables Amazon SQS transport module for Kombu
dev-python/markdown:pygments - Enable fancy pygments support
dev-python/matplotlib:excel - Pull dev-python/xlwt for the exceltools toolkit
dev-python/matplotlib:gtk2 - Enable x11-libs/gtk+:2 support
dev-python/matplotlib:gtk3 - Enable x11-libs/gtk+:3 support
dev-python/matplotlib:pyside - Qt support via dev-python/pyside
dev-python/mpmath:matplotlib - Add support for dev-python/matplotlib
dev-python/nbdime:webtools - Install web-based diff and merge tools.
dev-python/netaddr:cli - Enable netaddr shell with dev-python/ipython
dev-python/nltk:numpy - Use numpy for the saved word tokenizer
dev-python/numexpr:mkl - Enable support for Intel Vector Math Library, part of sci-libs/mkl.
dev-python/pandas:R - Enable support for R via dev-python/rpy
dev-python/pandas:excel - Pull a few Python packages for Microsoft Excel i/o
dev-python/pandas:full-support - Pull all packages to give pandas full support
dev-python/pandas:html - Enable HTML i/o via dev-python/beautifulsoup
dev-python/passlib:bcrypt - bcrpyt hash algoryptm support
dev-python/passlib:scrypt - accelerated scrypt algoythm support
dev-python/passlib:totp - time based one time password support
dev-python/paste:flup - enable support for flup (and therefore for various wgsi servers and middleware)
dev-python/paste:openid - enable OpenID support
dev-python/pillow:imagequant - Build with Image Quantization Library support
dev-python/pillow:ole - Add support for OLE2 image format
dev-python/py-amqp:extras - Install extra tools to generate initial Python mod from an AMQP XML file
dev-python/pygame:midi - Enable midi support using media-libs/portmidi
dev-python/pygpu:cuda - Enable NVIDIA CUDA toolkit support
dev-python/pygpu:opencl - Enable OpenCL support
dev-python/pyhamcrest:numpy - Enable optional dependence on dev-python/numpy
dev-python/pymongo:mod_wsgi - Disable the C extension to work with mod_wsgi.
dev-python/pyocr:cuneiform - Enable support for the app-text/cuneiform OCR engine
dev-python/pyocr:tesseract - Enable support for the app-text/tesseract OCR engine
dev-python/pypax:ptpax - Enable PT_PAX_FLAGS support.
dev-python/pypax:xtpax - Enable XATTR_PAX_FLAGS support.
dev-python/pyplusplus:indexing - Install indexing_suite_v2 to enhance boost python
dev-python/pyplusplus:numpy - Generate code for dev-libs/boost-numpy to accelerate arrays
dev-python/pypy:low-memory - Build using PyPy with the engine configured towards low memory footprint. \ This makes it possible to build PyPy using ~3.5G of RAM on amd64 and ~half of that on x86, at the cost of lengthened build time. Please note that you will need an extra ~1G of extra RAM or \ swap since the translation memory (unused at the time) is not freed when the C compiler is spawned.
dev-python/pypy:sandbox - Enable sandboxing functionality
dev-python/pypy:shadowstack - Use a shadow stack for finding GC roots
dev-python/pypy-bin:shadowstack - Use a shadow stack for finding GC roots
dev-python/pypy3:low-memory - Build using PyPy with the engine configured towards low memory footprint. This makes it possible to build PyPy using ~3.5G of RAM on amd64 and ~half of that on x86, at the cost of lengthened build time. Please note that you will need an extra ~1G of extra RAM or swap since the translation memory (unused at the time) is not freed when the C compiler is spawned.
dev-python/pypy3:sandbox - Enable sandboxing functionality
dev-python/pypy3:shadowstack - Use a shadow stack for finding GC roots
dev-python/pypy3-bin:shadowstack - Use a shadow stack for finding GC roots
dev-python/pyside:X - Build QtGui and QtTest modules
dev-python/pyside:declarative - Build QtDeclarative module
dev-python/pyside:designer - Build QtDesigner and QtUiTools modules
dev-python/pyside:help - Build QtHelp module
dev-python/pyside:multimedia - Build QtMultimedia module
dev-python/pyside:opengl - Build QtOpenGL module
dev-python/pyside:phonon - Build phonon module
dev-python/pyside:script - Build QtScript module
dev-python/pyside:scripttools - Build QtScriptTools module
dev-python/pyside:sql - Build QtSql module
dev-python/pyside:svg - Build QtSvg module
dev-python/pyside:webkit - Build QtWebKit module
dev-python/pyside:xmlpatterns - Build QtXmlPatterns module
dev-python/python-caja:gtk3 - Build with GTK+3 instead of GTK+2
dev-python/python-stdnum:vies - Enable VIES
dev-python/pyudev:pygobject - Install PyGobject bindings
dev-python/pyudev:pyside - Install PySide bindings
dev-python/pyudev:qt4 - Install PyQt4 bindings
dev-python/pyudev:qt5 - Install PyQt5 bindings
dev-python/pyyaml:libyaml - enable support for C implementation using libyaml
dev-python/pyzmq:green - Enable gevent compatibility with zeromq
dev-python/pyzor:gevent - Enable support for the gevent based handler
dev-python/pyzor:mysql - Enables mysql support
dev-python/pyzor:pyzord - enable support for pyzord
dev-python/pyzor:redis - Enables redis support
dev-python/rarfile:compressed - Enables the module to support compressed v3 archives by calling the app-arch/unrar.
dev-python/rdflib:redland - enable support for Redland triplestore
dev-python/restkit:cli - Install the restcli command line interface/tool, based on dev-python/ipython
dev-python/scrapy:boto - Add support for Amazon S3 via dev-python/boto
dev-python/scrapy:ibl - Use Instace Based Learning algorithm for automatic extraction
dev-python/simplecv:shell - Enable the iPython SimpleCV shell
dev-python/sphinx:net - enable internet capabilities
dev-python/spyder:ipython - Add support for dev-python/ipython
dev-python/spyder:matplotlib - Add support for dev-python/matplotlib
dev-python/spyder:numpy - Add support for dev-python/numpy
dev-python/spyder:pep8 - Add support for dev-python/pep8
dev-python/spyder:pyflakes - Add support for dev-python/pyflakes
dev-python/spyder:pylint - Add support for dev-python/pylint
dev-python/spyder:qtconsole - Add support for dev-python/qtconsole
dev-python/spyder:rope - Add support for dev-python/rope
dev-python/spyder:scipy - Add support for sci-libs/scipy
dev-python/spyder:sphinx - Add support for dev-python/sphinx
dev-python/starcluster:epydoc - Enable build of apidocs in html using epydoc
dev-python/sympy:imaging - Add support for dev-python/pillow
dev-python/sympy:ipython - Add support for dev-python/ipython
dev-python/sympy:mathml - Add support for mathml
dev-python/sympy:pyglet - Use dev-python/pyglet for plots and print preview
dev-python/sympy:symengine - Add support for a dev-python/symengine backend
dev-python/sympy:texmacs - Add app-office/texmacs interface
dev-python/sympy:theano - Add support for dev-python/theano
dev-python/tdaemon:coverage - Enable code coverage support
dev-python/translate-toolkit:html - Support conversion between po and html files
dev-python/translate-toolkit:ical - Support conversion between po and ical files
dev-python/translate-toolkit:ini - Support conversion between po and ini files
dev-python/translate-toolkit:subtitles - Support conversion between po and sub files
dev-python/translate-toolkit:yaml - Support YAML format
dev-python/twisted:conch - include Twisted SSHv2 implementation
dev-python/twisted:http2 - include http2 support
dev-python/twisted:serial - include serial port support
dev-python/twisted-core:serial - include serial port support
dev-python/vatnumber:vies - Enable VIES
dev-python/ws4py:client - Install client modules
dev-python/ws4py:server - Install server modules
dev-python/wxpython:doc - Install HTML wxWidgets docs and wxpython API reference.
dev-python/wxpython:examples - Install interactive demo module browser and sample applets.
dev-python/zeep:async - Add async support
dev-python/zsi:twisted - add support for python-twisted (needs dev-python/twisted-core and dev-python/twisted-web)
dev-qt/assistant:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/designer:declarative - Build the qdeclarativeview plugin
dev-qt/designer:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/designer:phonon - Build the phononwidgets plugin
dev-qt/designer:qt3support - Build the qt3supportwidgets plugin
dev-qt/designer:webkit - Build the qwebview plugin
dev-qt/linguist:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/linguist-tools:qml - Enable QML support in lupdate
dev-qt/pixeltool:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qdbusviewer:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qt-creator:android - Build plugin for Android devices
dev-qt/qt-creator:autotools - Enable autotools project manager plugin
dev-qt/qt-creator:baremetal - Build plugin for bare metal devices
dev-qt/qt-creator:bazaar - Add support for dev-vcs/bzr version control system
dev-qt/qt-creator:clang - Build clang-based code model plugin
dev-qt/qt-creator:clangcodemodel - Build clang-based code model plugin
dev-qt/qt-creator:clangstaticanalyzer - Build clang-based static analyzer plugin
dev-qt/qt-creator:clearcase - Add support for IBM ClearCase version control system (requires manual installation of ClearCase client)
dev-qt/qt-creator:cmake - Enable cmake project manager plugin
dev-qt/qt-creator:glsl - Enable GLSL source code editor
dev-qt/qt-creator:ios - Build plugin for Apple iOS devices
dev-qt/qt-creator:mercurial - Add support for dev-vcs/mercurial version control system
dev-qt/qt-creator:modeling - Enable graphical model editor
dev-qt/qt-creator:nim - Enable Nim source code editor
dev-qt/qt-creator:perforce - Add support for Perforce version control system (requires manual installation of Perforce client)
dev-qt/qt-creator:python - Enable Python source code editor
dev-qt/qt-creator:qbs - Enable QBS project manager plugin
dev-qt/qt-creator:qnx - Build plugin for QNX devices
dev-qt/qt-creator:scxml - Enable graphical SCXML editor
dev-qt/qt-creator:systemd - Add support for retrieving application output from journald
dev-qt/qt-creator:valgrind - Add support for memory debugging using dev-util/valgrind
dev-qt/qt-creator:webengine - Use dev-qt/qtwebengine to view documentation
dev-qt/qt-creator:webkit - Use dev-qt/qtwebkit to view documentation
dev-qt/qt-creator:winrt - Build plugin for WinRT devices
dev-qt/qt-meta:kde - Select media-libs/phonon as Phonon variant (needed for KDE)
dev-qt/qt-meta:qt3support - Enable the Qt3Support library for Qt4
dev-qt/qt-mobility:bluetooth - Enable Bluetooth support in QtConnectivity and QtSystemInfo modules
dev-qt/qt-mobility:connectivity - Build the QtConnectivity module
dev-qt/qt-mobility:contacts - Build the QtContacts module
dev-qt/qt-mobility:feedback - Build the QtFeedback module
dev-qt/qt-mobility:gallery - Build the QtGallery module
dev-qt/qt-mobility:location - Build the QtLocation module
dev-qt/qt-mobility:messaging - Build the QtMessaging module
dev-qt/qt-mobility:multimedia - Build the QtMultimediaKit module
dev-qt/qt-mobility:networkmanager - Enable NetworkManager support in QtBearer and QtSystemInfo modules
dev-qt/qt-mobility:organizer - Build the QtOrganizer module
dev-qt/qt-mobility:publishsubscribe - Build the QtPublishSubscribe module
dev-qt/qt-mobility:pulseaudio - Enable PulseAudio support in QtMultimediaKit module
dev-qt/qt-mobility:qml - Build QML bindings
dev-qt/qt-mobility:sensors - Build the QtSensors module
dev-qt/qt-mobility:serviceframework - Build the QtServiceFramework module
dev-qt/qt-mobility:systeminfo - Build the QtSystemInfo module
dev-qt/qt-mobility:tools - Build various useful tools (e.g.: qcrmlgen, servicexmlgen, vsexplorer, ...)
dev-qt/qt-mobility:versit - Build the QtVersit module
dev-qt/qt3support:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtbearer:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtbluetooth:qml - Build QML/QtQuick bindings and imports
dev-qt/qtcharts:qml - Build QML/QtQuick bindings and imports
dev-qt/qtcore:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtcore:glib - Enable dev-libs/glib eventloop support
dev-qt/qtcore:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtcore:systemd - Enable native journald logging support
dev-qt/qtdatavis3d:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtdatavis3d:qml - Build QML/QtQuick bindings and imports
dev-qt/qtdbus:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtdeclarative:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtdeclarative:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtdeclarative:localstorage - Build the LocalStorage import for QtQuick (requires QtSql)
dev-qt/qtdeclarative:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtdeclarative:webkit - Build the WebView QML component
dev-qt/qtdeclarative:widgets - Enable QtWidgets support
dev-qt/qtdeclarative:xml - Build the XmlListModel import for QtQuick (requires QtXmlPatterns)
dev-qt/qtdemo:dbus - Build QtDBus examples and demos
dev-qt/qtdemo:declarative - Build QtDeclarative examples and demos
dev-qt/qtdemo:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtdemo:multimedia - Build QtMultimedia examples and demos
dev-qt/qtdemo:opengl - Build QtOpenGL examples and demos
dev-qt/qtdemo:phonon - Build Phonon examples and demos
dev-qt/qtdemo:webkit - Build QtWebKit examples and demos
dev-qt/qtdemo:xmlpatterns - Build QtXmlPatterns examples and demos
dev-qt/qtgui:egl - Enable EGL integration
dev-qt/qtgui:eglfs - Build the EGL Full Screen/Single Surface platform plugin
dev-qt/qtgui:evdev - Enable support for input devices via evdev
dev-qt/qtgui:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtgui:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtgui:glib - Enable integration with the dev-libs/glib event loop
dev-qt/qtgui:gtkstyle - Build a widgets style that mimics the active GTK+ theme
dev-qt/qtgui:ibus - Build the IBus input method plugin
dev-qt/qtgui:libinput - Enable support for input devices via dev-libs/libinput
dev-qt/qtgui:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtgui:trace - Build the 'trace' graphicssystem engine which allows to record all drawing operations into a trace buffer. The trace can be replayed later with the qttracereplay tool.
dev-qt/qtgui:tslib - Enable support for touchscreen devices via x11-libs/tslib
dev-qt/qtgui:tuio - Build plugin to receive touch events over the TUIO protocol
dev-qt/qtgui:xcb - Build the XCB platform plugin and enable X11 integration
dev-qt/qthelp:compat - Build the extra compatibility layer required by a few packages, see http://blog.qt.io/blog/2010/06/22/qt-assistant-compat-version-available-as-extra-source-package/
dev-qt/qthelp:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtmultimedia:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtmultimedia:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtmultimedia:gstreamer - Enable audio support via media-libs/gstreamer using SLOT 1.0
dev-qt/qtmultimedia:gstreamer010 - Enable audio support via media-libs/gstreamer using SLOT 0.10
dev-qt/qtmultimedia:qml - Build QML/QtQuick bindings and imports
dev-qt/qtmultimedia:widgets - Build the QtMultimediaWidgets module
dev-qt/qtnetwork:bindist - Disable EC support via dev-libs/openssl
dev-qt/qtnetwork:connman - Enable net-misc/connman-based bearer plugin
dev-qt/qtnetwork:libproxy - Use net-libs/libproxy for automatic HTTP/SOCKS proxy configuration
dev-qt/qtnetwork:networkmanager - Enable net-misc/networkmanager-based bearer plugin
dev-qt/qtopengl:egl - Use EGL instead of GLX to manage OpenGL contexts
dev-qt/qtopengl:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtopengl:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtopengl:qt3support - Enable the Qt3Support libraries for Qt4
dev-qt/qtphonon:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtphonon:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtpositioning:geoclue - Use enhanced location information from app-misc/geoclue
dev-qt/qtpositioning:qml - Build QML bindings
dev-qt/qtprintsupport:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtquickcontrols:widgets - Enable QtWidgets support
dev-qt/qtscript:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtscript:scripttools - Build the QtScriptTools module (requires QtWidgets)
dev-qt/qtsensors:qml - Build QML bindings
dev-qt/qtsql:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtsql:qt3support - Enable the Qt3Support libraries for Qt4
dev-qt/qtsvg:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qttest:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtwayland:egl - Use EGL instead of GLX to manage OpenGL contexts
dev-qt/qtwayland:qml - Build QML/QtQuick bindings
dev-qt/qtwayland:wayland-compositor - Build Qt compositor for wayland
dev-qt/qtwebchannel:qml - Build QML/QtQuick bindings and imports
dev-qt/qtwebengine:geolocation - Enable physical position determination via dev-qt/qtpositioning
dev-qt/qtwebengine:pax_kernel - Enable building under a PaX enabled kernel
dev-qt/qtwebengine:system-ffmpeg - Use the system-wide media-video/ffmpeg instead of bundled.
dev-qt/qtwebengine:system-icu - Use the system-wide dev-libs/icu instead of bundled.
dev-qt/qtwebengine:widgets - Enable QtWidgets support
dev-qt/qtwebkit:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtwebkit:geolocation - Enable physical position determination via dev-qt/qtpositioning
dev-qt/qtwebkit:gstreamer - Enable HTML5 audio/video support via media-libs/gstreamer using SLOT 1.0
dev-qt/qtwebkit:gstreamer010 - Enable HTML5 audio/video support via media-libs/gstreamer using SLOT 0.10
dev-qt/qtwebkit:multimedia - Enable HTML5 audio/video support via dev-qt/qtmultimedia
dev-qt/qtwebkit:orientation - Enable device orientation detection via dev-qt/qtsensors
dev-qt/qtwebkit:printsupport - Enable printing via dev-qt/qtprintsupport
dev-qt/qtwebkit:qml - Build QML/QtQuick bindings
dev-qt/qtwebkit:webchannel - Enable integration with dev-qt/qtwebchannel
dev-qt/qtwebkit:webp - Add support for WebP image format
dev-qt/qtwebsockets:qml - Build QML bindings
dev-qt/qtwidgets:gles2 - Use GLES 2.0 or later instead of full OpenGL
dev-qt/qtwidgets:gtkstyle - Build a Qt style called GTK+ that mimics the active GTK+ theme
dev-ros/rosbag:lz4 - Add support for lz4 compressed bags.
dev-ros/rosconsole:glog - Use dev-cpp/glog as log backend.
dev-ros/rosconsole:log4cxx - Use dev-libs/log4cxx as log backend.
dev-ruby/barby:cairo - Add support for writing images (PNG, PS, EPS and, if supported, PDF and SVG) using dev-ruby/rcairo. Not available on JRuby.
dev-ruby/barby:png - Add support for writing PNG images using dev-ruby/chunky_png.
dev-ruby/barby:prawn - Add support for writing PDF documents using dev-ruby/prawn.
dev-ruby/barby:qrcode - Add support for QRCode 2D codes using dev-ruby/rqrcode.
dev-ruby/barby:rmagick - Add support for writing images (among others PNG, GIF and JPEG) using dev-ruby/rmagick. Not available on JRuby.
dev-ruby/facter:dmi - Use sys-apps/dmidecode to determine hardware system properties
dev-ruby/facter:pciutils - Use sys-apps/pciutils to determine hardware system properties
dev-ruby/facter:virt - Use app-emulation/virt-what for virtual machine detection
dev-ruby/faraday_middleware:mashify - Include FaradayMiddleware::Mashify
dev-ruby/faraday_middleware:oauth - Include FaradayMiddleware::OAuth
dev-ruby/faraday_middleware:parsexml - Include FaradayMiddleware::ParseXml
dev-ruby/faraday_middleware:rashify - Include FaradayMiddleware::Rashify
dev-ruby/maruku:highlight - Enable source code highlighting via dev-ruby/syntax
dev-ruby/net-ssh:sodium - Use dev-libs/libsodium via dev-ruby/rbnacl for Ed25519 support.
dev-ruby/rails:asset-pipeline - Also install the default components for the asset pipeline. These are not required but they are activated automatically in new Rails projects by default.
dev-ruby/rrdtool-bindings:graph - Enable support for graphing functions
dev-ruby/rspec-core:highlight - Enable source code highlighting via dev-ruby/coderay
dev-ruby/ruby-sdl:image - Enable media-libs/sdl-image support
dev-ruby/ruby-sdl:mixer - Enable media-libs/sdl-mixer support
dev-ruby/ruby-sdl:sge - Enable sdl-sge support
dev-ruby/rubygems:server - Install support for the rubygems server
dev-scheme/gauche-gl:cg - Enable NVidia Cg binding
dev-scheme/gauche-gtk:glgd - Enable GL graph draw
dev-scheme/guile:debug-freelist - Include garbage collector freelist debugging code
dev-scheme/guile:debug-malloc - Include malloc debugging code
dev-scheme/guile:deprecated - Enable deprecated features
dev-scheme/guile:discouraged - (implied by deprecated) enable merely discouraged features
dev-scheme/guile:networking - Include networking interfaces
dev-scheme/guile:regex - Include regular expression interfaces
dev-scheme/kawa:awt - Assume AWT is available
dev-scheme/kawa:echo2 - Enable support for the Echo2 web toolkit with dev-java/echo2
dev-scheme/kawa:frontend - Build "kawa" front-end program using sys-libs/readline
dev-scheme/kawa:jemacs - Build JEmacs
dev-scheme/kawa:krl - Build BRL emulation and KRL
dev-scheme/kawa:sax - Assume SAX2 is available with dev-java/sax
dev-scheme/kawa:servlets - Build support for generating servlets with dev-java/servletapi
dev-scheme/kawa:swing - Assume Swing is available
dev-scheme/kawa:swt - Assume SWT is available with dev-java/swt
dev-scheme/kawa:xqtests - Support XQuery Test Suite
dev-scheme/racket:backtrace - Support GC backtrace dumps
dev-scheme/racket:futures - Enable racket/future library for fine-grained hardware parallelism
dev-scheme/racket:places - Enable racket/place library for share-nothing parallelism and message-passing communication. Compared to futures, places are heavyweight, but they have a simpler performance model.
dev-scheme/racket:plot - Enable plot libraries
dev-scheme/racket:threads - Enable support for green threads
dev-scheme/scm:arrays - Support for arrays, uniform-arrays and uniform-vectors.
dev-scheme/scm:bignums - Support for large precision integers.
dev-scheme/scm:cautious - SCM will always check the number of arguments to interpreted closures.
dev-scheme/scm:dynamic-linking - Be able to load compiled files while running.
dev-scheme/scm:engineering-notation - Floats to display in engineering notation (exponents always multiples of 3) instead of scientific notation.
dev-scheme/scm:gsubr - generalized c arguments: for arbitrary (more then 11) arguments to C functions.
dev-scheme/scm:inexact - Support for floating point numbers.
dev-scheme/scm:ioext - Commonly available I/O extensions: line I/O, file positioning, file delete and rename, and directory functions.
dev-scheme/scm:libscm - Build and install libscm.a and related headers
dev-scheme/scm:macro - C level support for hygienic and referentially transparent macros (syntax-rules macros).
dev-scheme/scm:regex - String regular expression matching.
dev-scheme/scm:unix - Support for: nice, acct, lstat, readlink, symlink, mknod and sync.
dev-scheme/slib:gambit - Support for gambit scheme implementation
dev-scheme/slib:scm - Support for scm scheme implementation
dev-tcltk/expect-lite:debug - pull in packages needed for runtime interactive debugger
dev-tcltk/tktreectrl:shellicon - shellicon extension
dev-tex/abntex:lyx - Install with app-office/lyx layout
dev-tex/biblatex:biber - Install the unicode compatible backend processor
dev-tex/circuit_macros:script - Install cm2pdf to automatically create a correctly sized PDF from a circuit_macro m4 source
dev-tex/dot2texi:pgf - Enable support for dev-tex/pgf (The TeX Portable Graphic Format)
dev-tex/dot2texi:pstricks - Enable pstricks support
dev-texlive/texlive-basic:luajittex - Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.
dev-util/android-ndk:legacy-toolchains - Install legacy toolchains
dev-util/android-ndk:target-32 - Support for 32-bit targets
dev-util/android-ndk:target-64 - Support for 64-bit targets
dev-util/anjuta:devhelp - Enable devhelp integration
dev-util/anjuta:glade - Build glade plugin for anjuta
dev-util/anjuta:packagekit - Use packagekit to search for missing tools
dev-util/anjuta:terminal - Enable terminal plugin based on x11-libs/vte
dev-util/apitrace:cli - Enable command line interface
dev-util/apitrace:egl - Enable EGL support
dev-util/apitrace:system-snappy - Link dynamic against app-arch/snappy
dev-util/bazel:tools - Install extra bazel tools to build from sources
dev-util/bitcoin-tx:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
dev-util/bitcoin-tx:ljr - Enable Luke Dashjr's patches
dev-util/buildbot:irc - Add support for status delivery through an ircbot.
dev-util/buildbot:mail - Add support for watching a maildir for commits.
dev-util/buildbot:manhole - Add support for manhole (debug over ssh)
dev-util/bustle:interactivetests - Build interactive test programs
dev-util/bustle:threaded - Build with support for multithreaded execution.
dev-util/catalyst:ccache - Enables ccache support
dev-util/cccc:apidoc - Build software docs with doxygen/graphviz and metrics with cccc
dev-util/cccc:mfc - Add patch for MFC dialect options
dev-util/cmake:server - Enable cmake-server support.
dev-util/cmake:system-jsoncpp - Use system copy of dev-libs/jsoncpp instead of bundled one.
dev-util/coccigrep:vim - Install the coccigrep vim plugin
dev-util/codeblocks:contrib - Build additional contrib components
dev-util/codelite:clang - Enable LLVM C Compiler support
dev-util/codelite:sftp - Enable SFTP connection support
dev-util/cppcheck:htmlreport - install cppcheck-htmlreport
dev-util/ctags:ada - Enable Ada support
dev-util/ctags:json - Enable JSON output support
dev-util/ctags:xml - Enable XML parsing support
dev-util/ctags:yaml - Enable YAML parsing support
dev-util/cwdiff:a2ps - install app-text/a2ps for postscript output
dev-util/cwdiff:mercurial - install hg wdiff alias for dev-vcs/mercurial
dev-util/devhelp:gedit - Install plugin for app-editors/gedit
dev-util/dialog:minimal - Disable library, install command-line program only
dev-util/edb-debugger:graphviz - Add support for the Graphviz library
dev-util/edb-debugger:legacy-mem-write - Probe if writes to /proc/PID/mem are broken.
dev-util/edb-debugger:pax_kernel - Enable building under a PaX enabled kernel
dev-util/electron:gtk3 - Build with GTK+3 instead of GTK+2
dev-util/electron:hidpi - Enable support for high-resolution screens (high dots per inch)
dev-util/electron:lto - Build with link time optimization enabled
dev-util/electron:pic - Disable optimized assembly code that is not PIC friendly
dev-util/electron:proprietary-codecs - Enable proprietary codecs like H.264, MP3
dev-util/electron:system-ffmpeg - Use system ffmpeg instead of the bundled one
dev-util/electron:tcmalloc - Use bundled tcmalloc instead of system malloc
dev-util/emilpro:system-binutils - Use the gentoo binutils instead of building against an unpatched vanilla version
dev-util/fatrace:powertop - Add powetop integration
dev-util/geany:gtk3 - Use GTK+3 instead of GTK+2
dev-util/geany:vte - Enable Terminal support (x11-libs/vte)
dev-util/geany-plugins:autoclose - Enable the autoclose plugin.
dev-util/geany-plugins:automark - Enable the automark plugin
dev-util/geany-plugins:commander - Enable the commander plugin which provides a command panel for rapid access to any action.
dev-util/geany-plugins:ctags - Enable ctags plugin
dev-util/geany-plugins:debugger - Enable the debugger plugin which interfaces with sys-devel/gdb
dev-util/geany-plugins:defineformat - Enable the defineformat plugin.
dev-util/geany-plugins:enchant - Enable spell checking using enchant
dev-util/geany-plugins:gpg - Enable geanypg plugin which integrates GPG using app-crypt/gpgme
dev-util/geany-plugins:gtk3 - Use GTK+3 instead of GTK+2
dev-util/geany-plugins:gtkspell - Use gtkspell for dictionary support in GeanyVC
dev-util/geany-plugins:keyrecord - Enable the keyrecord plugin
dev-util/geany-plugins:multiterm - Enable the multiterm plugin
dev-util/geany-plugins:overview - Enable overview plugin
dev-util/geany-plugins:scope - Enable the scope plugin which is a graphical GDB front-end
dev-util/geany-plugins:soup - Enable updatechecker and geniuspaste plugins which require net-libs/libsoup
dev-util/global:vim - Integrate the GNU GLOBAL source code tag system with Vim
dev-util/google-perftools:debug - Build a set of libraries with debug support (so-called debugalloc). These are available by default but are not needed unless you're actually developing using tcmalloc.
dev-util/google-perftools:largepages - Use (experimental) larger pages for tcmalloc, this increases memory usage, but should speed up the allocation/free operations.
dev-util/google-perftools:minimal - Only build the tcmalloc_minimal library, ignoring the heap checker and the profilers.
dev-util/google-perftools:optimisememory - To build libtcmalloc with smaller internal caches.
dev-util/gtk-doc:highlight - Enable source code highlighting
dev-util/gtk-doc:vim - Enable source code highlighting through app-editors/vim
dev-util/idea-community:custom-jdk - Install and use IntelliJ's custom JRE.
dev-util/idea-ultimate:custom-jdk - Install and use IntelliJ's custom JRE.
dev-util/intel-ocl-sdk:android - Install android related files
dev-util/intel-ocl-sdk:system-boost - Use system boost (dev-libs/boost) instead of bundled one
dev-util/intel-ocl-sdk:system-clang - Use system clang (sys-devel/clang) instead of bundled one
dev-util/intel-ocl-sdk:system-qt - Use system Qt (sys-devel-qtcore, sys-devel/qtgui) instead of bundled one
dev-util/intel-ocl-sdk:system-tbb - Use sytem Thread Building Blocks (dev-cpp/tbb) instead of bundled one
dev-util/intel-ocl-sdk:tools - Install Intel Offline Compiler
dev-util/kdevelop:gdbui - Enable GUI for attaching GDB to a running process
dev-util/kdevelop:ninja - Enable support for Ninja build system
dev-util/kdevelop:okteta - Enable hex editor plugin
dev-util/kdevelop:qmake - Enable support for QMake build system
dev-util/kdevelop:qthelp - Enable support for QtHelp documentation browsing
dev-util/kdevplatform:reviewboard - Enable reviewboard support
dev-util/kdevplatform:welcomepage - Enable welcome page, requires dev-qt/qtdeclarative
dev-util/ltrace:unwind - Use sys-libs/libunwind for frame unwinding support
dev-util/lttng-tools:ust - Support LTTng-UST (Userspace Tracing)
dev-util/mdds:valgrind - Add support for memory debugging using dev-util/valgrind
dev-util/mingw64-runtime:idl - Install idl files.
dev-util/mingw64-runtime:libraries - Build extra libraries.
dev-util/mingw64-runtime:tools - Build extra tools.
dev-util/molecule:plugins - Add plugins provided by dev-util/molecule-plugins
dev-util/nemiver:memoryview - Enable the optional hexadecimal memory inspection with app-editors/ghex.
dev-util/nvidia-cuda-sdk:cuda - Build CUDA binaries.
dev-util/nvidia-cuda-sdk:opencl - Build OpenCL binaries.
dev-util/nvidia-cuda-toolkit:debugger - Installs the CUDA debugger.
dev-util/nvidia-cuda-toolkit:eclipse - Install plugins for eclipse
dev-util/nvidia-cuda-toolkit:profiler - Installs the NVIDIA CUDA visual profiler.
dev-util/perf:demangle - Enable C++ symbol name demangling, using libbfd from sys-devel/binutils. When this flag is enabled, the package will have to be rebuilt after every version bump of binutils.
dev-util/perf:doc - Build documentation and man pages. With this USE flag disabled, the --help parameter for perf and its sub-tools will not be available. This is optional because it depends on a few documentation handling tools that are not always welcome on user systems.
dev-util/perf:numa - Enable NUMA support
dev-util/perf:perl - Add support for Perl as a scripting language for perf tools.
dev-util/perf:unwind - Use sys-libs/libunwind for frame unwinding support.
dev-util/pkgconfig:internal-glib - Use internal copy of dev-libs/glib
dev-util/pkgconfig-openbsd:pkg-config - Install as a replacement for dev-util/pkgconfig
dev-util/radare2:system-capstone - Use dev-libs/capstone instead of bundled copy.
dev-util/scanmem:gui - Enable the GameConqueror GUI
dev-util/schroot:btrfs - Enable support for chroots using btrfs snapshots.
dev-util/schroot:dchroot - Enables the building of a wrapper named "dchroot", replacing sys-apps/dchroot.
dev-util/schroot:lvm - Enable support for chroots using LVM snapshots.
dev-util/squashdelta:lz4 - Enable support for LZ4 compression using app-arch/lz4
dev-util/squashmerge:lz4 - Enable support for LZ4 compression using app-arch/lz4
dev-util/strace:aio - Enable dev-libs/libaio support for tracing Asynchronous I/O operations
dev-util/strace:unwind - Enable stack backtraces (-k flag) via sys-libs/libunwind
dev-util/suse-build:symlink - Provide compatibility symlinks with original openSUSE package (might clash with other packages)
dev-util/sysdig:modules - Build kernel modules needed for tracing local events. Disable this only if you intend to use sysdig purely to work with dumpfiles.
dev-util/sysprof:systemd - Build the sysprofd daemon service, required to run the UI without root permissions. Relies on sys-apps/systemd running as the init system.
dev-util/systemtap:libvirt - Support probing of libvirt domains.
dev-util/trace-cmd:udis86 - Enable support for dev-libs/udis86 disassembler library
dev-util/universalindentgui:html - Add support for HTML files
dev-vcs/bzr:sftp - Enable sftp support
dev-vcs/bzr-gtk:gpg - Support signing with GnuPG.
dev-vcs/bzr-gtk:nautilus - Integrate with Nautilus file manager
dev-vcs/cssc:valgrind - Enable usage of dev-util/valgrind in tests
dev-vcs/cvs:server - Enable server support
dev-vcs/cvs2svn:bazaar - Support for dev-vcs/bzr
dev-vcs/cvsync:gcrypt - Use dev-libs/libgcrypt for hash functions.
dev-vcs/cvsync:mhash - Use app-crypt/mhash for hash functions.
dev-vcs/cvsync:openssl - Use dev-libs/openssl for hash functions.
dev-vcs/darcs:diff - Use 'lcs' for diff building.
dev-vcs/darcs:http - Use the pure Haskell HTTP package for HTTP support.
dev-vcs/darcs:network-uri - Get Network.URI from the network-uri package.
dev-vcs/darcs:terminfo - Use the terminfo package for enhanced console support.
dev-vcs/darcs:threaded - Use threading and SMP support.
dev-vcs/fossil:fusefs - Enable the Fuse Filesystem
dev-vcs/fossil:json - Enable the JSON API of Fossil's wiki
dev-vcs/fossil:legacy-mv-rm - Enable legacy behavior for mv/rm (skip checkout files)
dev-vcs/fossil:miniz - Use the bundled miniz for compression instead of zlib
dev-vcs/fossil:sqlite - Use the system SQLite instead of the bundled one
dev-vcs/fossil:th1-docs - Enable TH1 for embedded documentation pages
dev-vcs/fossil:th1-hooks - Enable TH1 hooks for commands and web pages
dev-vcs/git:blksha1 - Use the new optimized SHA1 implementation
dev-vcs/git:cgi - Install gitweb too
dev-vcs/git:curl - Support fetching and pushing (requires webdav too) over http:// and https:// protocols
dev-vcs/git:gpg - Pull in gnupg for signing -- without gnupg, attempts at signing will fail at runtime!
dev-vcs/git:gtk - Include the gitview contrib tool
dev-vcs/git:highlight - GitWeb support for app-text/highlight
dev-vcs/git:mediawiki - Support pulling and pushing from MediaWiki
dev-vcs/git:mediawiki-experimental - Add experimental patches for improved MediaWiki support
dev-vcs/git:ppcsha1 - Make use of a bundled routine that is optimized for the PPC arch
dev-vcs/git:subversion - Include git-svn for dev-vcs/subversion support
dev-vcs/git:tk - Include the 'gitk' and 'git gui' tools
dev-vcs/git:webdav - Adds support for push'ing to HTTP/HTTPS repositories via DAV
dev-vcs/git-annex:assistant - Enable git-annex assistant and watch command
dev-vcs/git-annex:benchmark - Enable benchmarking
dev-vcs/git-annex:concurrentoutput - Use concurrent-output library (experimental)
dev-vcs/git-annex:cryptonite - Use the cryptonite library, instead of the older cryptohash
dev-vcs/git-annex:ekg - Enable use of EKG to monitor git-annex as it runs.
dev-vcs/git-annex:magicmime - Use libmagic to determine file MIME types
dev-vcs/git-annex:network-uri - Get Network.URI from the network-uri package.
dev-vcs/git-annex:pairing - Enable pairing of git annex repositories
dev-vcs/git-annex:s3 - Enable Amazon S3 remote
dev-vcs/git-annex:torrentparser - Use haskell torrent library to parse torrent files
dev-vcs/git-annex:webapp - Enable git-annex webapp
dev-vcs/git-annex:webdav - Enable webdav remote
dev-vcs/gitg:glade - Install a glade catalog file
dev-vcs/gitg:python - Install Python bindings for those plugins requiring it.
dev-vcs/gitolite:contrib - Install user-contributed files
dev-vcs/gitolite:tools - Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible
dev-vcs/gitolite-gentoo:contrib - Install user-contributed files
dev-vcs/gitolite-gentoo:tools - Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible
dev-vcs/kdesvn:man - Build and install man pages
dev-vcs/mercurial:bugzilla - Support bugzilla integration.
dev-vcs/mercurial:gpg - Support signing with GnuPG.
dev-vcs/mercurial:tk - Install dev-lang/tk for hgk script.
dev-vcs/qct:bazaar - Support for dev-vcs/bzr
dev-vcs/qct:mercurial - Support for dev-vcs/mercurial
dev-vcs/qct:monotone - Support for dev-vcs/monotone
dev-vcs/rabbitvcs:caja - Enable extension for mate-base/caja
dev-vcs/rabbitvcs:cli - Eanble console based frontend
dev-vcs/rabbitvcs:diff - Use for diff command dev-util/meld
dev-vcs/rabbitvcs:gedit - Enable plugin for app-editors/gedit
dev-vcs/rabbitvcs:nautilus - Enable extension for gnome-base/nautilus
dev-vcs/rabbitvcs:thunar - Enable extension for xfce-base/thunar
dev-vcs/subversion:ctypes-python - Build and install Ctypes Python bindings
dev-vcs/subversion:dso - Enable runtime module search
dev-vcs/subversion:extras - Install extra scripts (examples, tools, hooks)
dev-vcs/subversion:http - Enable http support using net-libs/serf
dev-vcs/subversion:kwallet - Enable encrypted storage of passwords with kde-apps/kwalletd
games-action/beathazardultra:bundled-libs - Use the upstream provided bundled libraries.
games-action/chromium-bsu:mixer - Enables media-libs/sdl-mixer sound backend instead of media-libs/openal one.
games-action/d1x-rebirth:demo - Use the demo data instead of the full game
games-action/d1x-rebirth:l10n_de - Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign
games-action/d1x-rebirth:music - Support for ingame music
games-action/d1x-rebirth:opl3-musicpack - Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip
games-action/d1x-rebirth:sc55-musicpack - Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module
games-action/d2x-rebirth:demo - Install games-action/descent2-demodata as well
games-action/d2x-rebirth:l10n_de - Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign
games-action/d2x-rebirth:music - Support for ingame music
games-action/d2x-rebirth:opl3-musicpack - Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip
games-action/d2x-rebirth:sc55-musicpack - Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module
games-action/dxx-rebirth:data - Install data files
games-action/dxx-rebirth:descent1 - Install Descent 1 resources and executable
games-action/dxx-rebirth:descent2 - Install Descent 2 resources and executable
games-action/dxx-rebirth:l10n_de - Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign
games-action/dxx-rebirth:music - Enable music support
games-action/dxx-rebirth:opl3-musicpack - Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip
games-action/dxx-rebirth:sc55-musicpack - Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module
games-action/dxx-rebirth:textures - Include high resolution (640x480) backgrounds, briefing images and fonts (Descent 1)
games-action/hotline-miami:bundled-libs - Use bundled libraries.
games-action/hotline-miami:launcher - Install qt launcher
games-action/minetest:leveldb - Enable LevelDB backend
games-action/minetest:luajit - Use dev-lang/luajit instead of dev-lang/lua
games-action/minetest:redis - Enable redis backend via dev-libs/hiredis
games-action/minetest:server - Build minetest server
games-action/minetest:spatial - Enable SpatialIndex AreaStore backend
games-action/solar2:bundled-libs - Use the upstream provided bundled libraries.
games-action/super-hexagon:bundled-libs - Use the upstream provided bundled libraries.
games-action/supertuxkart:fribidi - Support for right-to-left languages
games-action/supertuxkart:wiimote - Support for wiimote input devices
games-action/swordandsworcery:bundled-libs - Use the upstream provided bundled libraries.
games-action/trine2:bundled-libs - Use bundled libraries.
games-action/trine2:launcher - Install gtk+ launcher
games-action/voxelands:audio - Enables audio support
games-action/voxelands:client - Builds the rich client
games-action/voxelands:server - Builds the dedicated server
games-arcade/bomns:editor - enables building the level editor
games-arcade/burgerspace:network - Enable client-server support
games-arcade/commandergenius:tremor - Use media-libs/tremor as ogg decoder instead of media-libs/libvorbis
games-arcade/jumpnbump:music - Enable playing of background music
games-arcade/lbreakout2:themes - Install additional themes
games-arcade/moleinvasion:music - Download and install the music files
games-arcade/performous:midi - Enable MIDI I/O support
games-arcade/performous:songs - Install a few demo songs
games-arcade/performous:tools - Install tools
games-arcade/performous:webcam - Enable Webcam support
games-arcade/savagewheels:fmod - Enable the fmod music and sound effects library
games-arcade/slimevolley:net - Enable network support
games-arcade/smc:music - Download and install the music files
games-arcade/tuxanci:physfs - Use dev-games/physfs instead of dev-libs/libzip to load compressed data
games-arcade/tuxanci:sound - Enable sound
games-board/cockatrice:server - Compile server support
games-board/crafty:no-opts - Don't try to enable crazy CFLAG options
games-board/freedoko:backgrounds - Install additional background images
games-board/freedoko:gnomecards - Install the gnome-games card set
games-board/freedoko:kdecards - Install the KDE card set
games-board/freedoko:net - Enable network game support
games-board/freedoko:openclipartcards - Install the openclipartcards card set
games-board/freedoko:pysolcards - Install the PySol card set
games-board/freedoko:xskatcards - Install the XSkat card set
games-board/grhino:gtp - Install the GTP (Go/Game Text Protocol) frontend
games-board/pasang-emas:extras - Install some extra themes
games-board/pioneers:help - Enable gnome ingame help via scrollkeeper
games-board/pysolfc:extra-cardsets - Install extra cardsets
games-board/pysolfc:sound - Enable sound support using dev-python/pygame
games-board/spider:athena - Enable athena widgets
games-board/stockfish:armv7 - Build for armv7; enables PIE
games-board/stockfish:general-32 - Generic unoptimized 32-bits build
games-board/stockfish:general-64 - Generic unoptimized 64-bits build
games-board/stockfish:optimize - Enable upstream -O3 optimizations (default enabled)
games-board/tablebase-syzygy:6-pieces - Install tablebases for 6 pieces (huge!)
games-board/xboard:default-font - Install the default font that xboard uses
games-board/xboard:zippy - Enable experimental zippy client
games-emulation/dolphin:egl - Enable EGL support
games-emulation/dolphin:evdev - Enable evdev input support
games-emulation/dolphin:llvm - Enable the LLVM-based disassembler for debugger mode
games-emulation/dolphin:log - Increase logging output
games-emulation/dolphin:lto - Add support for link-time optimizations.
games-emulation/dosbox:glide - Enable unofficial Glide emulation via media-libs/openglide
games-emulation/fceux:logo - Enable the ability to add a logo screen when creating AVIs
games-emulation/generator:sdlaudio - Enable SDL Audio
games-emulation/higan:icarus - Build icarus library manager
games-emulation/higan:profile_accuracy - Compile a binary optimized for accuracy
games-emulation/higan:profile_balanced - Compile a binary with balanced optimization
games-emulation/higan:profile_performance - Compile a binary optimized for performance
games-emulation/higan:udev - Enable udev based input
games-emulation/mednafen:debugger - Build with internal debugger
games-emulation/mednafen:pax_kernel - Triggers a paxmarking of the binary
games-emulation/mupen64plus:audio-sdl - Enable SDL audio plugin.
games-emulation/mupen64plus:input-sdl - Enable SDL input plugin.
games-emulation/mupen64plus:rsp-hle - Enable HLE RSP plugin.
games-emulation/mupen64plus:ui-console - Enable default console UI.
games-emulation/mupen64plus:ui-m64py - Enable PyQt4 UI using games-emulation/m64py.
games-emulation/mupen64plus:video-glide64mk2 - Enable Glide64mk2 video plugin.
games-emulation/mupen64plus:video-rice - Enable Rice video plugin.
games-emulation/mupen64plus-core:debugger - Build the debugger
games-emulation/mupen64plus-core:gles2 - Use GLES2 instead of OpenGL
games-emulation/mupen64plus-core:new-dynarec - Enable new experimental dynamic recompiler implementation (only for x86 and arm)
games-emulation/mupen64plus-core:osd - Overlay emulator messages using on-screen-display
games-emulation/mupen64plus-video-glide64mk2:gles2 - Use GLES2 instead of OpenGL
games-emulation/mupen64plus-video-glide64mk2:hires - Support hi-resolution textures (requires dev-libs/boost)
games-emulation/mupen64plus-video-rice:gles2 - Use GLES2 instead of OpenGL
games-emulation/nestopia:gui - Enable GUI
games-emulation/pcsxr:cdio - Use libcdio for CD support
games-emulation/pcsxr:sdl - Use SDL sound backend (other parts of SDL are used unconditionally)
games-emulation/ppsspp:headless - Build headless version of the PPSSPP
games-emulation/ppsspp:system-ffmpeg - Use the system-wide media-video/ffmpeg instead of bundled
games-emulation/sdlmame:arcade - Enable the Multiple Arcade Machine Emulator for arcade games support
games-emulation/sdlmame:mess - Enable the Multi Emulator Super System for game system support
games-emulation/sdlmame:tools - Build development tools shared between sdlmame and sdlmess
games-emulation/snes9x:netplay - Enable playing ROMs over the network (not recommended)
games-emulation/snes9x:xrandr - Enable support for the X xrandr extension
games-emulation/vbam:link - Enable GBA linking functionality
games-emulation/yabause:pic - disable optimized assembly code that is not PIC friendly
games-emulation/zsnes:debug - Enable the builtin debugger
games-emulation/zsnes:pax_kernel - Triggers a paxmarking of the binary
games-engines/frobtads:tads2compiler - Build TADS2 compiler
games-engines/frobtads:tads3compiler - Build TADS3 compiler
games-engines/odamex:master - Build master server target (advertises odamex server list)
games-engines/odamex:odalaunch - Build the wxwidgets based launcher.
games-engines/odamex:portmidi - Enable portmidi support.
games-engines/odamex:server - Build server target.
games-engines/openmw:devtools - Install development tools like bsatool, esmtool and opencs.
games-engines/renpy:development - Install IDE for game developers and an empty game template
games-engines/scummvm:fluidsynth - compile with support for fluidsynth
games-engines/scummvm:mpeg2 - enable mpeg2 codec for cutscenes
games-engines/scummvm:unsupported - enable unsupported and/or broken game engines (you're on your own)
games-engines/solarus:doc - Install doxygen developer documentation.
games-engines/solarus:luajit - Use LuaJIT instead of default Lua.
games-engines/stratagus:fluidsynth - compile with support for fluidsynth
games-fps/alienarena:vidmode - Link against x11-libs/libXxf86vm. Required for full-screen support.
games-fps/darkplaces:cdsound - Enables using CD audio in the engine
games-fps/darkplaces:demo - Uses the demo data from quake1 (quake1-demodata)
games-fps/darkplaces:lights - Install and setup the updated light maps
games-fps/darkplaces:textures - Install and setup the updated textures
games-fps/doom-data:doomsday - Add wrapper to run it within doomsday
games-fps/doom3:dedicated - install only as a dedicated game server
games-fps/doom3:roe - Adds support for the Resurrection of Evil expansion
games-fps/doomsday:demo - Install launcher dor doom1.wad from games-fps/doom-data
games-fps/doomsday:doom - Install launcher for jdoom game
games-fps/doomsday:fluidsynth - Build the FluidSynth sound driver
games-fps/doomsday:freedoom - Install launcher for doom1.wad from games-fps/freedoom
games-fps/doomsday:heretic - Install launcher for jheretic game
games-fps/doomsday:hexen - Install launcher for jhexen game
games-fps/doomsday:resources - Enable support for games-fps/doomsday-resources in jdoom launcher
games-fps/doomsday:snowberry - Install Snowberry doomsday front-end
games-fps/doomsday:tools - Build additional tools such as doomsday-shell, md2tool and texc
games-fps/duke3d:demo - Install the demo files
games-fps/duke3d:pic - disable optimized assembly code that is not PIC friendly
games-fps/duke3d-data:gog - Extract the data from the GOG.com installer.
games-fps/eduke32:demo - Install games-fps/duke3d-demodata as well
games-fps/eduke32:gtk - Compile with gtk launcher
games-fps/eduke32:offensive - Include optional XXX texture pack (needs USE 'textures')
games-fps/eduke32:opl-musicpack - Include optional OPL (AdLib) music pack
games-fps/eduke32:samples - Install samples
games-fps/eduke32:sc55-musicpack - Include optional Roland SC-55 music pack
games-fps/eduke32:server - Compile with server support
games-fps/eduke32:textures - Include optional high-resolution textures (needs USE 'opengl')
games-fps/eduke32:tools - Build several tools for modding and development
games-fps/eduke32:vpx - Enable support for WebM VP8 Codecs (needs USE 'opengl')
games-fps/lsdldoom:freedoom - Install games-fps/freedoom wad file
games-fps/lsdldoom:net - Enables network game support
games-fps/lsdldoom:shareware - Install games-fps/doom-data for shareware wad file
games-fps/nexuiz:maps - Install the community map pack
games-fps/quake2-icculus:demo - Install the demo files (quake2-demodata) and configure for use
games-fps/quake2-icculus:qmax - Build the pretty version (quake max)
games-fps/quake2-icculus:rogue - Build support for the 'Ground Zero' Mission Pack (rogue)
games-fps/quake2-icculus:xatrix - Build support for the 'The Reckoning' Mission Pack (xatrix)
games-fps/quake3:mumble - Adds player-location (positional audio) support to VoIP
games-fps/quake3:teamarena - Adds support for Team Arena expansion pack
games-fps/quake3:voice - Adds VoIP support
games-fps/quake3-bin:teamarena - Adds support for Team Arena expansion pack
games-fps/quake3-demo:dedicated - install only as a dedicated game serer
games-fps/quakeforge:wildmidi - enable libWildMidi support
games-fps/quakeforge:xdg - enable XDG support
games-fps/qudos:demo - Install the demo files (quake2-demodata) and configure for use
games-fps/qudos:mods - Build support for the quake2 mission packs
games-fps/qudos:qmax - Build the pretty version (quake max)
games-fps/qudos:textures - Install the enhanced textures (quake2-textures)
games-fps/rott:demo - Install the shareware version
games-fps/sauerbraten:server - Compile server support
games-fps/turtlearena:mumble - Adds player-location (positional audio) support to VoIP
games-fps/turtlearena:server - Build server target
games-fps/turtlearena:voice - Adds VoIP support
games-fps/unreal-tournament-goty:S3TC - Add the extra fancy textures to UT ... only works on certain cards (nvidia/ati/s3)
games-fps/urbanterror:altgamma - Alternative way for gamma setting with modesetting driver
games-fps/urbanterror:client - Build binary for client (includes code for non-dedicated server)
games-fps/urbanterror:mumble - Use Mumble for ingame VoIP (experimental)
games-fps/urbanterror:opus - Use opus as sound codec
games-fps/urbanterror:server - Build binary for dedicated server
games-fps/urbanterror:voip - Use ioq3 ingame VoIP (experimental)
games-fps/warsow:irc - Enable IRC support
games-fps/warsow:server - Build server binaries additionally
games-fps/worldofpadman:maps - Install extra maps (PadPack)
games-fps/xonotic:ode - Enable support for physics engine from dev-games/ode
games-kids/crayon-physics:bundled-libs - Use the upstream provided bundled libraries.
games-misc/katawa-shoujo:system-renpy - Use games-engines/renpy instead of the bundled one (experimental)
games-misc/little-inferno:bundled-libs - Use bundled libraries.
games-misc/ponysay:fish-completion - Enable fish completion support
games-misc/ponysay:non-free - Install non-free ponies (i.e. from the MLP franchise)
games-misc/xcowsay:fortune - Installs the fortune-mod xcow binary
games-mud/tf:atcp - enable ATCP support.
games-mud/tf:gmcp - enable GMCP support.
games-mud/tf:option102 - enable telnet option 102 support.
games-puzzle/cuyo:music - Enable playing of background music
games-puzzle/jag:editor - Install level editor
games-puzzle/nightsky:bundled-libs - Use the upstream provided bundled libraries.
games-puzzle/numptyphysics:user-levels - Install some fun user-created levels
games-puzzle/pingus:music - Enable playing of background music
games-puzzle/sgt-puzzles:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
games-puzzle/tiny-and-big:bundled-libs - Use the upstream provided bundled libraries.
games-puzzle/xlogical:alt_gfx - Use alternate graphics which are closer to the original Amiga version
games-roguelike/FTL:bundled-libs - Use bundled libraries.
games-roguelike/angband:sound - Enable and install sounds
games-roguelike/nethack:experimental - Enable experimental features (showscore and status_hilite)
games-roguelike/stone-soup:luajit - Use dev-lang/luajit as scripting backend instead of dev-lang/lua.
games-roguelike/stone-soup:ncurses - Enable for console (uses ncurses) based build. (can be enabled on top of tiles)
games-roguelike/stone-soup:tiles - Enable for graphical (tiled) build. (can be enabled on top of ncurses)
games-roguelike/tomenet:server - Compile server support
games-rpg/a-bird-story:bundled-libs - Use bundled libraries
games-rpg/arx-fatalis-data:gog - Extract the data from the GOG.com installer.
games-rpg/arx-libertatis:c++0x - Build ROOT using the C++11 standard.
games-rpg/arx-libertatis:crash-reporter - Build a dev-qt/qtgui-based tool that allows to submit crash information to the upstream backtracker.
games-rpg/arx-libertatis:debug - Enable asserts and debug logging.
games-rpg/arx-libertatis:static - Link libraries statically, currently only media-libs/glew
games-rpg/arx-libertatis:tools - Build tools that can extract the game's data and save files.
games-rpg/arx-libertatis:unity-build - Build everything in one big source file, allowing for faster build times and better optimizations at the cost of higher memory usage.
games-rpg/daimonin-client:music - Install extra music
games-rpg/drascula:sound - Install optional audio files
games-rpg/dreamweb:doc - High-resolution scans of the written material in the original UK game box
games-rpg/dungeon-defenders:bundled-libs - Use the upstream provided bundled libraries.
games-rpg/eternal-lands-data:bloodsuckermaps - Will install Bloodsucker's Maps in place of the official map files.
games-rpg/eternal-lands-data:music - Adds in-game music.
games-rpg/eternal-lands-data:sound - Adds in-game sound effects.
games-rpg/grimrock:bundled-libs - Use bundled libraries.
games-rpg/kqlives:cheats - Enable cheating mode
games-rpg/manaplus:mumble - Enable support for voice chat
games-rpg/manaplus:pugixml - Use dev-libs/pugixml for XML parsing isntead of dev-libs/libxml2
games-rpg/manaplus:sdl2 - Use libsdl2 instead of libsdl
games-rpg/nwn:hou - Install the Hordes of the Underdark expansion pack
games-rpg/nwn:sou - Installs the Shadows of Undrentide expension pack
games-rpg/nwn-data:hou - Install the Hordes of the Underdark expansion pack
games-rpg/nwn-data:nowin - For those people who cant grab the 1.2 gigs of data files from a windows partition
games-rpg/nwn-data:sou - Installs the Shadows of Undrentide expension pack
games-rpg/sumwars:tools - Builds editor tools
games-rpg/to-the-moon:bundled-libs - Use bundled libraries
games-simulation/flightgear:dbus - Enable screensaver DBus interaction
games-simulation/flightgear:gdal - Enable alternative terrain engine based on pagedLOD using sci-libs/gdal
games-simulation/flightgear:qt5 - Build Qt5 launcher application
games-simulation/flightgear:udev - Enable event-based Input devices through virtual/udev
games-simulation/flightgear:utils - Build various utilities (fgpanel, fgviewer among others)
games-simulation/openrct2:multiplayer - Enable multiplayer functionality
games-simulation/openrct2:twitch - Enable Twitch support
games-simulation/openttd:aplaymidi - Enables midi music in game, using aplaymidi as an external player
games-simulation/openttd:dedicated - Build only the openttd server, and not the client.
games-simulation/openttd:lzo - Enables LZO compression for savegames. This is only needed to load extremely old savegames. (versions before 0.2)
games-simulation/openttd:openmedia - Enables the free open media sets: OpenGFX, OpenSFX, OpenMSX, removing the requirement for proprietary TTD assets to play OpenTTD.
games-simulation/singularity:music - Install music files
games-sports/speed-dreams:xrandr - Enable support for the X xrandr extension
games-sports/xmoto:editor - Depend on inkscape, scripts to convert svg to level (svg2lvl)
games-strategy/0ad:editor - Include Atlas scenario editor projects
games-strategy/0ad:lobby - Enable the use of net-libs/gloox and the multiplayer lobby
games-strategy/0ad:nvtt - Support for some uncompressed data formats via media-gfx/nvidia-texture-tools (might be needed for some mods)
games-strategy/defcon-demo:system-libs - Use system libraries instead of the ones included in the upstream distribution.
games-strategy/freeciv:aimodules - Support for dynamically loadable AI modules (server-side)
games-strategy/freeciv:auth - Add authentication capability via mysql, postgres or sqlite3
games-strategy/freeciv:mapimg - Additional mag image toolkit via media-gfx/imagemagick
games-strategy/freeciv:modpack - Build the freeciv-modpack-program to download/install mods
games-strategy/freeciv:server - Enable server support. Disabling this will also make it impossible to start local games.
games-strategy/freeciv:sound - Add support for sound provided by media-libs/sdl-mixer
games-strategy/freeciv:system-lua - Use dev-lang/lua instead of the bundled liblua
games-strategy/freesynd:devtools - Build development tools
games-strategy/heroes3:maps - Installs optional map data
games-strategy/heroes3:music - Installs optional music data
games-strategy/heroes3:sounds - Installs optional sound data
games-strategy/ja2-stracciatella:editor - Adds necessary file to run the editor
games-strategy/ja2-stracciatella:linguas_ru_gold - Support for russian gold ja2 version
games-strategy/liquidwar6:doc - Convert the info pages to html
games-strategy/liquidwar6:gles2 - Enable OpenGL ES 2.0 support
games-strategy/liquidwar6:gtk - Used to display error/critical messages
games-strategy/liquidwar6:maps - Install extra maps
games-strategy/liquidwar6:ogg - Enable mod-ogg via media-libs/sdl-mixer (currently the only sound provider)
games-strategy/liquidwar6:readline - Enable interactive script shell for hacking
games-strategy/megaglest:editor - Build map editor
games-strategy/megaglest:fribidi - Enable FriBIDi support
games-strategy/megaglest:model-viewer - Build model viewer
games-strategy/megaglest:streflop - Use the library streflop. Out of synchs may occur if not enabled.
games-strategy/megaglest:tools - Build model import/export tools
games-strategy/megaglest:unicode - Use unicode strings for wxwidgets
games-strategy/megaglest:wxuniversal - Use the wxUniversal port which implements the various GUI controls by drawing them itself
games-strategy/naev:mixer - Enables media-libs/sdl-mixer sound backend in addition to media-libs/openal one.
games-strategy/openra:tools - Install some development tools such as editor.
games-strategy/seven-kingdoms:network - Enable support for multiplayer via media-libs/sdl-net
games-strategy/ufo-ai:editor - Build map editor
games-strategy/uqm:music - download and install music files (large)
games-strategy/uqm:remix - download and install music remix files (large)
games-strategy/uqm:voice - download and install voice files (large)
games-strategy/warzone2100:qt4 - Use qt-gui/qt-opengl for backend rendering instead of sdl
games-strategy/wesnoth:fribidi - Support for right-to-left languages
games-strategy/wesnoth:server - Enable compilation of server
games-util/gslist:web - Enable the web interface
games-util/pyfa:graph - Enable support for graphs
games-util/wit:fuse - Enable image mount support via fuse
gnome-base/gconf:ldap - Build backend which enables default mail accounts, addressbooks and calendars for Evolution to be configured using each user's LDAP entry."
gnome-base/gdm:fprint - Enables experimental fingerprint authentication using sys-auth/fprintd
gnome-base/gdm:plymouth - Enable support for smooth transition from sys-boot/plymouth
gnome-base/gnome:classic - Install gnome-extra/gnome-shell-extensions for the Gnome Shell Classic mode
gnome-base/gnome:extras - Install additional GNOME applications
gnome-base/gnome-common:autoconf-archive - Pull in sys-devel/autoconf-archive for ax_*.m4 files instead of installing them from the gnome-common tarball
gnome-base/gnome-control-center:colord - Support color management using x11-misc/colord
gnome-base/gnome-control-center:gnome-online-accounts - Enable configuration panel for net-libs/gnome-online-accounts accounts
gnome-base/gnome-control-center:i18n - Enable support for enhanced input methods through app-i18n/ibus
gnome-base/gnome-desktop:license-docs - Install help files documenting GNOME's licenses
gnome-base/gnome-extra-apps:games - Install Gnome Games
gnome-base/gnome-extra-apps:share - Install the gnome-extra/gnome-user-share personal file sharing tool
gnome-base/gnome-extra-apps:shotwell - Install the media-gfx/shotwell photo manager
gnome-base/gnome-extra-apps:tracker - Install the app-misc/tracker indexer and the GNOME packages that require it
gnome-base/gnome-keyring:ssh-agent - Use GNOME Keyring to unlock SSH keys. Recommended unless you are using ECDSA or Ed25519 keys.
gnome-base/gnome-light:gnome-shell - Install gnome-base/gnome-shell and x11-wm/mutter for the standard GNOME 3 desktop mode
gnome-base/gnome-session:gconf - Optional support for gnome-base/gconf configuration storage system
gnome-base/gnome-settings-daemon:colord - Support color management using x11-misc/colord
gnome-base/gnome-settings-daemon:openrc-force - Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
gnome-base/gnome-settings-daemon:short-touchpad-timeout - Change the touchpad timeout so that it's effective for fast typists
gnome-base/gnome-shell:openrc-force - Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
gnome-base/gvfs:afp - Enables support for accessing AFP (Apple Filing Protocol) network shares
gnome-base/gvfs:archive - Enables support for accessing files in archives transparently via app-arch/libarchive
gnome-base/gvfs:bluray - Enable playback of Blu-ray filesystems using media-libs/libbluray
gnome-base/gvfs:fuse - Enables fuse mount points in $HOME/.gvfs for legacy application access
gnome-base/gvfs:gnome-online-accounts - Enable configuration panel for net-libs/gnome-online-accounts accounts
gnome-base/gvfs:google - Enables support for accessing Google accounts via dev-libs/libgdata
gnome-base/gvfs:http - Enable the HTTP/DAV backend using net-libs/libsoup-gnome
gnome-base/gvfs:nfs - Enable NFS client support via net-fs/libnfs.
gnome-base/gvfs:udev - Enable udev base replacement code for cdda feature
gnome-base/libglade:tools - Install libglade-convert Python script.
gnome-base/libgnomecanvas:glade - Enable glade support
gnome-base/librsvg:tools - Build svg viewer tool
gnome-base/nautilus:packagekit - Use packagekit to search for programs to open unknown file types
gnome-base/nautilus:previewer - Use gnome-extra/sushi to preview files from the file mananger
gnome-base/nautilus:sendto - Enable the nautilus-sendto extension to send files to various locations/devices
gnome-base/nautilus:tracker - Add support for app-misc/tracker search
gnome-base/orbit:pic - Force libname-server-2 to be built as PIC; needed on hardened systems
gnome-extra/cinnamon-control-center:colord - Support color management using x11-misc/colord
gnome-extra/cinnamon-settings-daemon:colord - Support color management using x11-misc/colord
gnome-extra/evolution-data-server:api-doc-extras - Build documentation for private APIs
gnome-extra/evolution-data-server:berkdb - sys-libs/db support needed to migrate old (pre-3.12 evolution versions) addressbook data
gnome-extra/evolution-data-server:gnome-online-accounts - Enable using net-libs/gnome-online-accounts for authorization
gnome-extra/evolution-data-server:google - Enable Google Contacts support. This will also enable the internal Google authentication support. Please note this last one relies on a deprecated (and vulnerable) net-libs/webkit-gtk slot. If you want to avoid this dependency, you can disable this support and rely on gnome-online-accounts instead
gnome-extra/evolution-data-server:weather - Enable optional weather calendar support
gnome-extra/gnome-boxes:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
gnome-extra/gnome-builder:clang - Provide integration with sys-devel/clang for best possible C/C++ autocompletion, semantic highlighting, symbol resolving, and diagnostics support
gnome-extra/gnome-builder:git - Provide support for the Git version control system via dev-libs/libgit2-glib (such as setup of Git for New Project, direct cloning for Open Project and changed lines indicators in the editor gutter)
gnome-extra/gnome-builder:sysprof - Provide an integrated profiler via dev-util/sysprof
gnome-extra/gnome-builder:vala - Provide an autoindenter, autocompletion, diagnostics, and symbol resolver for Vala
gnome-extra/gnome-builder:webkit - Enable net-libs/webkit-gtk using plugins support and the HTML/Markdown previewer plugin
gnome-extra/gnome-color-manager:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
gnome-extra/gnome-commander:chm - Enable metadata support for Microsoft Compiled HTML Help files
gnome-extra/gnome-commander:gsf - Add metadata support for OLE, OLE2 and ODF
gnome-extra/gnome-commander:pdf - Add metadata support for PDF
gnome-extra/gnome-commander:python - Add support for python plugins
gnome-extra/gnome-commander:samba - Add support for SAMBA (Windows File and Printer sharing)
gnome-extra/gnome-commander:taglib - Add metadata support for ID3, Vorbis, FLAC and APE
gnome-extra/gnome-commander:unique - Enable single instance support using dev-libs/libunique
gnome-extra/gnome-dvb-daemon:totem - Build a plugin for media-video/totem
gnome-extra/gnome-system-monitor:systemd - Display sys-apps/systemd metadata, e.g. unit names, for running processes
gnome-extra/libgda:canvas - Enable support for x11-libs/goocanvas
gnome-extra/libgda:http - Enable embedded net-libs/libsoup based server
gnome-extra/libgda:json - Enable support for JSON format
gnome-extra/libgda:mdb - Enable support for Microsoft Access database using app-office/mdbtools
gnome-extra/libgda:reports - Install tools for generating graphical reports
gnome-extra/libgda:sourceview - Enable support for x11-libs/gtksourceview
gnome-extra/libgsf:gtk - Enable use of gdk in thumbnailer
gnome-extra/nemo:packagekit - Use packagekit to search for programs to open unknown file types
gnome-extra/nemo:tracker - Add support for app-misc/tracker search
gnome-extra/nm-applet:gcr - Enable advanced certificate chooser, requires app-crypt/gcr
gnome-extra/nm-applet:modemmanager - Enable support for mobile broadband devices using net-misc/modemmanager
gnome-extra/nm-applet:teamd - Enable teamd configuration editor
gnome-extra/sushi:office - Support viewing file formats such as generated by app-office/libreoffice
gnome-extra/synapse:plugins - Build support for plugins using librest
gnome-extra/synapse:zeitgeist - Add support for Zeitgeist event tracking system
gnome-extra/zeitgeist:datahub - Use build datahub for passive event injection
gnome-extra/zeitgeist:downloads-monitor - Monitor the XDG_DOWNLOAD_DIRECTORY
gnome-extra/zeitgeist:fts - Enable the full text search extension
gnome-extra/zeitgeist:sql-debug - Enable SQL debugging
gnome-extra/zeitgeist:telepathy - Enable telepathy framework as data source
gnustep-apps/gemas:projectcenter - Build and install plugin for gnustep-apps/projectcenter
gnustep-apps/gworkspace:gwmetadata - Enable the metadata indexing and searching system
gnustep-base/gnustep-back-art:xim - Enable X11 XiM input method
gnustep-base/gnustep-back-cairo:xim - Enable X11 XiM input method
gnustep-base/gnustep-back-xlib:xim - Enable X11 XiM input method
gnustep-base/gnustep-gui:speech - Audio support using app-accessibility/flite
gnustep-base/gnustep-make:libobjc2 - Enables use of the GNUstep Objective-C runtime (gnustep-base/libobjc2) with non-fragile ABI and sys-devel/clang compiler
gnustep-base/gnustep-make:native-exceptions - Enables use of the native Objective-C exception support (@try/@catch/@finally) built-in objective-c exceptions with compilers that support it
gnustep-base/libobjc2:boehm-gc - Enable Hans Boehm's garbage collector (dev-libs/boehm-gc). Not recommended by upstream
kde-apps/akonadi:designer - Install plugin for dev-qt/designer
kde-apps/akonadi:tools - Install tools for developers and testing
kde-apps/akonadi-contacts:prison - Enable support for QRcodes in contacts
kde-apps/analitza:eigen - Enable dev-cpp/eigen mathematical templates support
kde-apps/artikulate:qtmedia - Enable playback via Qt5Multimedia
kde-apps/blogilo:google - Google service integration via kde-apps/libkgapi
kde-apps/cantor:R - Enable dev-lang/R backend support
kde-apps/cantor:analitza - Enable kde-apps/analitza backend support
kde-apps/cantor:julia - Enable dev-lang/julia backend support
kde-apps/cantor:qalculate - Enable sci-libs/libqalculate backend support
kde-apps/dolphin:thumbnail - Enables video thumbnail generation
kde-apps/dolphin-plugins:bazaar - Enable support for the bazaar VCS
kde-apps/dolphin-plugins:dropbox - Enable support for the dropbox fileviewer plugin
kde-apps/dolphin-plugins:git - Enable support for the git VCS
kde-apps/dolphin-plugins:mercurial - Enable support for the mercurial VCS
kde-apps/gwenview:kipi - Support for the KDE Image Plugin Interface
kde-apps/k3b:emovix - Enable burning support for eMoviX images
kde-apps/kaccessible:speechd - Enable support for the speech-dispatcher speech synthesizer
kde-apps/kaddressbook:prison - Enable support for QRcodes in contacts
kde-apps/kalzium:editor - Enable the embedded molecule editor/viewer
kde-apps/kalzium:solver - Enable the equation solver
kde-apps/kate:addons - Build and install additional plugins
kde-apps/kde-apps-meta:pim - Pull in KDE PIM suite
kde-apps/kde-apps-meta:sdk - Pull in developer-specific meta-packages
kde-apps/kdeadmin-meta:cron - Installs KDE application for virtual/cron configuration
kde-apps/kdebase-kioslaves:sftp - Enable SFTP protocol support using net-libs/libssh
kde-apps/kdebase-runtime-meta:oldwallet - Install kde-apps/kwalletd on a minimal setup for migration purposes
kde-apps/kdecore-meta:minimal - Disable install of various KDE SC 4 based packages
kde-apps/kdegraphics-mobipocket:thumbnail - Enables thumbnail generation
kde-apps/kdenetwork-meta:ppp - Enable support for net-dialup/ppp.
kde-apps/kdenlive:freesound - Enable freesound.org credentials support via dev-qt/qtwebkit to download files
kde-apps/kdenlive:gles2 - Use GLES 2.0 or later instead of full OpenGL
kde-apps/kdenlive:jogshuttle - Enable support for Jog-Shuttle devices
kde-apps/kdepim-addons:google - Google service integration via kde-apps/libkgapi
kde-apps/kdepim-apps-libs:prison - Enable support for QRcodes in contacts
kde-apps/kdepim-common-libs:google - Google service integration via kde-apps/libkgapi
kde-apps/kdepim-runtime:google - Google service integration via kde-apps/libkgapi
kde-apps/kdepimlibs:prison - Enable support for QRcodes in contacts
kde-apps/kdeutils-meta:floppy - Install kde-apps/kfloppy to format and create DOS or ext2fs filesystems in a floppy.
kde-apps/keditbookmarks:man - Build and install man pages
kde-apps/kget:bittorrent - Enable bittorrent transfer plugin through net-libs/libktorrent
kde-apps/kget:gpg - Enable signature verification by QGpgME via kde-apps/kdepimlibs
kde-apps/kget:mms - Enable MMS (Microsoft Media Server) plugin through media-libs/libmms
kde-apps/kig:geogebra - Support files created by sci-mathematics/geogebra
kde-apps/kig:scripting - Support Python scripting
kde-apps/kio-extras:activities - Enable activities kioslave and fileitem plugin
kde-apps/kio-extras:htmlthumbs - Enable HTML thumbnail previews via dev-qt/qtwebengine
kde-apps/kio-extras:man - Enable manpages kioslave
kde-apps/kio-extras:phonon - Enable file audio preview plugin using media-libs/phonon
kde-apps/kio-extras:sftp - Enable SFTP protocol support using net-libs/libssh
kde-apps/konqueror:activities - Enable kactivities support
kde-apps/konqueror:bookmarks - Add dependency on bookmark package.
kde-apps/konqueror:filemanager - Install the dolphin kpart for use as a file manager.
kde-apps/konqueror:speech - Build text-to-speech plugin
kde-apps/kopete:addbookmarks - Automatically add incoming urls to bookmarks.
kde-apps/kopete:autoreplace - Automatically replace selected text
kde-apps/kopete:contactnotes - Enables writing personal notes for contacts.
kde-apps/kopete:gadu - Enable the Gadu protocol handler.
kde-apps/kopete:groupwise - Enable the Groupwise protocol handler.
kde-apps/kopete:highlight - Allows you to specify highlights on specific events.
kde-apps/kopete:history - Enables saving chat history.
kde-apps/kopete:latex - Embed latex formatted text into messages.
kde-apps/kopete:meanwhile - Enable the Sametime protocol handler.
kde-apps/kopete:nowlistening - Shows song you currently listen to in your status/etc. Bindings for many players.
kde-apps/kopete:otr - Allows crypting your chat (drugs and talking nonsense are considered as good alternatives ;]).
kde-apps/kopete:pipes - Send messages to external pipe.
kde-apps/kopete:privacy - Filter for incoming messages
kde-apps/kopete:skype - Enable Skype protocol handler (not fully functional yet).
kde-apps/kopete:statistics - Everybody loves statistic graphs, especially cake ones. ;]
kde-apps/kopete:testbed - Enable the testbed protocol.
kde-apps/kopete:texteffect - Various fancy text effects for your messages (don't ever consider writing us with this enabled ;]).
kde-apps/kopete:translator - Translate incoming and outgoing messages.
kde-apps/kopete:urlpicpreview - Enables in conversation pictures preview.
kde-apps/kopete:webpresence - Show your status and some more information on web.
kde-apps/kopete:winpopup - Enable pop-up messages sending on windows. (same as good old "net send" messages ;])
kde-apps/kopete:yahoo - Enable yahoo protocol support.
kde-apps/kopete:zeroconf - Enable Link-Local Messaging via the bonjour protocol.
kde-apps/kpimtextedit:designer - Build plugins for dev-qt/designer
kde-apps/kpimtextedit:speech - Enable text-to-speech support
kde-apps/krfb:ktp - Enable displaying of KDE Telepathy contacts
kde-apps/krfb:telepathy - Enable desktop sharing through a telepathy client
kde-apps/kstars:fits - Enable support for NASA's sci-libs/cfitsio library
kde-apps/kstars:indi - Enable support for Astronomical control library using libindi
kde-apps/kstars:wcs - Enable support for World Coordinate System library using wcslib
kde-apps/kstars:xplanet - Enable support for Xplanet
kde-apps/ktp-accounts-kcm:experimental - Enables disabled telepathy services (currently only steam)
kde-apps/ktp-common-internals:otr - Enable support for encrypted conversations using Off-The-Records messaging
kde-apps/ktp-common-internals:sso - Enable support for Single sign-on through KAccounts
kde-apps/ktp-text-ui:speech - Enable incoming messages to be read out using text-to-speech
kde-apps/kwalletd:gpg - Support wallets with GnuPG encryption additionally to default blowfish-encrypted file
kde-apps/kwave:opus - Enable Opus audio codec support
kde-apps/kwave:qtmedia - Enable playback via Qt5Multimedia
kde-apps/libkdepim:designer - Build plugins for dev-qt/designer
kde-apps/mailcommon:designer - Build plugins for dev-qt/designer
kde-apps/marble:aprs - Enable support for APRS data sources
kde-apps/marble:designer - Install plugin for dev-qt/designer
kde-apps/marble:designer-plugin - Enable designer plugin
kde-apps/marble:phonon - Enable sound support via media-libs/phonon
kde-apps/marble:positioning - Enable position information via dev-qt/qtpositioning and dev-qt/qtlocation
kde-apps/marble:shapefile - Enable support for ESRI shapefiles
kde-apps/marble:zip - Enable support for reading and displaying .kmz files
kde-apps/okular:chm - Enable support for Microsoft Compiled HTML Help files
kde-apps/okular:ebook - Add E-Book support
kde-apps/okular:mobi - Add mobipocket support
kde-apps/okular:mobile - Enable Plasma mobile support
kde-apps/okular:speech - Enable text-to-speech support
kde-apps/pimcommon:designer - Build plugins for dev-qt/designer
kde-apps/spectacle:kipi - Enable support for the KDE Image Plugin Interface
kde-apps/spectacle:share - Enable support for a share menu using dev-libs/purpose
kde-apps/step:qalculate - Enable the libqalculate library for unit conversion
kde-frameworks/frameworkintegration:appstream - Enable AppStream software metadata support
kde-frameworks/kconfigwidgets:man - Build and install man pages
kde-frameworks/kded:man - Build and install man pages
kde-frameworks/kdelibs:opengl - Enable OpenGL support for Plasma (GLApplet)
kde-frameworks/kdesignerplugin:designer - Build KF5 widgets plugin for QtDesigner
kde-frameworks/kdesignerplugin:webkit - Build kdewebkit plugin for QtDesigner
kde-frameworks/kfilemetadata:epub - Adds support for reading EPUB ebook metadata
kde-frameworks/kfilemetadata:mobi - Adds support for reading MOBI ebook metadata
kde-frameworks/kimageformats:eps - Support the EPS graphics file format
kde-frameworks/kinit:caps - Capabilities support for improved security and better OOM handling
kde-frameworks/kinit:man - Build and install man pages
kde-frameworks/kio:kwallet - Enable permanent storage of passwords for kpasswdserver with kde-frameworks/kwallet
kde-frameworks/knotifications:speech - Enable text-to-speech notification support
kde-frameworks/knotifyconfig:phonon - Add sound support via media-libs/phonon
kde-frameworks/kpackage:man - Build and install man pages
kde-frameworks/kservice:man - Build and install man pages
kde-frameworks/ktextwidgets:speech - Enable text-to-speech support
kde-frameworks/kwallet:gpg - Support wallets with GnuPG encryption in addition to the default blowfish-encrypted file
kde-frameworks/kwallet:man - Build and install man pages
kde-frameworks/kxmlgui:attica - Enable support for kde-frameworks/attica
kde-frameworks/networkmanager-qt:teamd - Enable Teamd control support
kde-frameworks/oxygen-icons:sources - Additionally install the svg sources of the bitmap icons (needed for redistribution)
kde-frameworks/plasma:egl - Enable EGL support
kde-frameworks/plasma:gles2 - Use GLES 2.0 or later instead of full OpenGL
kde-frameworks/sonnet:aspell - Enable the app-text/aspell spell-checking backend
kde-frameworks/sonnet:hunspell - Enable the app-text/hunspell spell-checking backend
kde-misc/kdeconnect:app - Enable experimental kcapp frontend
kde-misc/kdeconnect:wayland - Enable kwin_wayland support for mousepad plugin using kde-frameworks/kwayland
kde-misc/kimtoy:scim - Enable Smart Common Input Method support
kde-misc/kio-gdrive:dolphin - Enable integration with kde-apps/dolphin
kde-misc/tellico:addressbook - Add support for kdepim addressbook (kabc)
kde-misc/tellico:discid - Add support for reading disc IDs from audio CDs
kde-plasma/kde-cli-tools:kdesu - Build graphical frontend for kde-frameworks/kdesu
kde-plasma/kde-gtk-config:gtk3 - Add support for gtk+3-based applications.
kde-plasma/kdeplasma-addons:share - Enable applet for quickly sharing data to a variety of sources
kde-plasma/kinfocenter:egl - Retrieve information about OpenGL via EGL
kde-plasma/kinfocenter:gles2 - Show OpenGL ES information in kinfocenter
kde-plasma/kinfocenter:pci - Show advanced PCI information
kde-plasma/kmenuedit:hotkeys - Enable support for hotkey editing
kde-plasma/kwallet-pam:oldwallet - Enable legacy support for kde-apps/kwalletd
kde-plasma/kwin:gles2 - Use OpenGL ES 2 instead of full GL
kde-plasma/kwin:multimedia - Enable effect video button in desktop effects KCM
kde-plasma/libksysguard:detailedmemory - Enable display of detailed memory information using dev-qt/qtwebkit.
kde-plasma/plasma-desktop:appstream - Enable AppStream software metadata support
kde-plasma/plasma-desktop:gtk2 - Add support for gtk+2-based applications using legacy xembed systray icons via libappindicator.
kde-plasma/plasma-desktop:gtk3 - Add support for gtk+3-based applications using legacy xembed systray icons via libappindicator.
kde-plasma/plasma-desktop:ibus - Use ibus input method via app-i18n/ibus
kde-plasma/plasma-desktop:legacy-systray - Add support for applications using legacy xembed systray icons.
kde-plasma/plasma-desktop:packagekit - Add support for packagekit integration
kde-plasma/plasma-desktop:scim - Enable applets that use app-i18n/scim
kde-plasma/plasma-meta:display-manager - Pull in a graphical display manager
kde-plasma/plasma-meta:grub - Pull in Breeze theme for sys-boot/grub
kde-plasma/plasma-meta:gtk - Enable Breeze widget style and KCM for GTK2 and GTK3
kde-plasma/plasma-meta:pam - Enable support for kwallet auto-unlocking
kde-plasma/plasma-meta:plymouth - Pull in Breeze theme for sys-boot/plymouth
kde-plasma/plasma-meta:pulseaudio - Install Plasma applet for PulseAudio volume management
kde-plasma/plasma-meta:sddm - Pull in the x11-misc/sddm display manager and KCM
kde-plasma/plasma-meta:sdk - Pull in kde-plasma/plasma-sdk for Plasma development
kde-plasma/plasma-meta:wallpapers - Install wallpapers for the Plasma Workspace
kde-plasma/plasma-nm:modemmanager - Enable support for mobile broadband devices
kde-plasma/plasma-nm:openconnect - Build support for the OpenConnect VPN client
kde-plasma/plasma-nm:teamd - Enable Teamd control support
kde-plasma/plasma-sdk:plasmate - IDE for writing Plasma/KWin components (themes, plasmoids, runners, data engines)
kde-plasma/plasma-workspace:geolocation - Enables dataengine providing location information
kde-plasma/plasma-workspace:prison - Enable support for barcodes/QRcodes
kde-plasma/plasma-workspace:qalculate - Enable Qalculate runner using sci-libs/libqalculate
kde-plasma/powerdevil:elogind - Use sys-auth/elogind for session tracking.
kde-plasma/powerdevil:wireless - Enable wireless energy saving actions via kde-frameworks/bluez-qt and kde-frameworks/networkmanager-qt
kde-plasma/systemsettings:classic - Enable classic mode plugin, requires kde-frameworks/khtml
lxde-base/lxdm:consolekit - Enables support for authorization using consolekit
lxde-base/lxdm:gtk3 - Use GTK+3 instead of 2
lxde-base/lxterminal:gtk3 - Use GTK+3 instead of GTK+2
lxqt-base/lxqt-meta:about - Install lxqt-base/lxqt-about
lxqt-base/lxqt-meta:admin - Install lxqt-base/lxqt-admin
lxqt-base/lxqt-meta:filemanager - Install x11-misc/pcmanfm-qt file manager
lxqt-base/lxqt-meta:icons - Install an icon theme
lxqt-base/lxqt-meta:lightdm - Install x11-misc/lightdm display manager
lxqt-base/lxqt-meta:lximage - Install media-gfx/lximage-qt image viewer
lxqt-base/lxqt-meta:minimal - Do not install x11-wm/openbox window manager
lxqt-base/lxqt-meta:oxygen - Prefer kde-frameworks/oxygen-icons (default)
lxqt-base/lxqt-meta:powermanagement - Install lxqt-base/lxqt-powermanagement package
lxqt-base/lxqt-meta:sddm - Install x11-misc/sddm display manager
lxqt-base/lxqt-meta:ssh-askpass - Install lxqt-base/lxqt-openssh-askpass user password prompt tool
lxqt-base/lxqt-meta:sudo - Install lxqt-base/lxqt-sudo
lxqt-base/lxqt-panel:clock - Build clock plugin
lxqt-base/lxqt-panel:colorpicker - Build colorpicker plugin
lxqt-base/lxqt-panel:cpuload - Build cpuload plugin
lxqt-base/lxqt-panel:desktopswitch - Build desktopswitch plugin
lxqt-base/lxqt-panel:dom - Build dom plugin
lxqt-base/lxqt-panel:kbindicator - Build kbindicator plugin
lxqt-base/lxqt-panel:mainmenu - Build mainmenu plugin
lxqt-base/lxqt-panel:mount - Build mount plugin
lxqt-base/lxqt-panel:networkmonitor - Build networkmonitor plugin
lxqt-base/lxqt-panel:quicklaunch - Build quicklaunch plugin
lxqt-base/lxqt-panel:screensaver - Build screensaver plugin
lxqt-base/lxqt-panel:sensors - Build sensors plugin
lxqt-base/lxqt-panel:showdesktop - Build showdesktop plugin
lxqt-base/lxqt-panel:statusnotifier - Build statusnotifier plugin
lxqt-base/lxqt-panel:sysstat - Build sysstat plugin
lxqt-base/lxqt-panel:taskbar - Build taskbar plugin
lxqt-base/lxqt-panel:tray - Build tray plugin
lxqt-base/lxqt-panel:volume - Build volume plugin
lxqt-base/lxqt-panel:worldclock - Build worldclock plugin
mail-client/alot:doc - Install user manual and API documentation
mail-client/alpine:chappa - enhance alpine by applying Eduardo Chappa's patches
mail-client/alpine:onlyalpine - installs only the alpine binary, so it does not collied with pico and/or pine
mail-client/alpine:passfile - Adds support for caching passwords into a file between sessions
mail-client/alpine:smime - Enable support for S/MIME
mail-client/balsa:crypt - Adds support for GnuPG encryption
mail-client/balsa:gtkhtml - Use gtkhtml for HTML rendering
mail-client/balsa:gtkspell - Use gtkspell for dictionary support
mail-client/balsa:rubrica - Adds support for rubrica addressbook
mail-client/claws-mail:archive - Enable archiving plugin
mail-client/claws-mail:bogofilter - Build mail-filter/bogofilter plugin
mail-client/claws-mail:gdata - Enable plugin for access to Google data providers
mail-client/claws-mail:gtk3 - Build support for GTK+3
mail-client/claws-mail:libcanberra - Enable sound notification in connection with USE=notification
mail-client/claws-mail:libindicate - Enable notification through DBUS in connection with USE=notification
mail-client/claws-mail:libnotify - Enable notification on the desktop in connection with USE=notification
mail-client/claws-mail:notification - Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify
mail-client/claws-mail:pgp - Enable PGP support
mail-client/claws-mail:sieve - Build plugin for sieve filter support
mail-client/claws-mail:smime - Build plugin for S/MIME support
mail-client/claws-mail:spam-report - Enable plugin for spam reporting to various services
mail-client/claws-mail:spamassassin - Build mail-filter/spamassassin plugin
mail-client/claws-mail:valgrind - Add support for memory debugging using valgrind
mail-client/claws-mail:webkit - Enables HTML e-mail rendering by using the net-libs/webkit-gtk library.
mail-client/evolution:bogofilter - Build mail-filter/bogofilter plugin
mail-client/evolution:crypt - Enable GPG encryption support using app-crypt/gnupg and app-crypt/pinentry
mail-client/evolution:highlight - Enable text highlighting plugin
mail-client/evolution:ldap - Enable support for fetching contacts from an LDAP or Active Directory server using net-nds/openldap
mail-client/evolution:map - Enable support for displaying contacts on a map inside evolution using media-libs/libchamplain
mail-client/evolution:spamassassin - Build mail-filter/spamassassin plugin
mail-client/evolution:weather - Enable optional weather calendar support
mail-client/mail-notification:sylpheed - Enable support for MH mailboxes used by mail-client/sylpheed
mail-client/mutt:gpg - Enable support for app-crypt/gpgme
mail-client/mutt:hcache - Enable header cache
mail-client/mutt:lmdb - Enable dev-db/lmdb database backend for header caching
mail-client/mutt:notmuch - Enable support for net-mail/notmuch
mail-client/mutt:pop - Enable support for POP3
mail-client/mutt:sidebar - Enable the sidebar feature
mail-client/mutt:smime - Enable support for S/MIME
mail-client/mutt:smtp - Enable support for smtp
mail-client/mutt:tokyocabinet - Enable dev-db/tokyocabinet database backend for header caching
mail-client/nail:kerberos - If network is enabled, this adds support for GSSAPI login on IMAP through virtual/krb5.
mail-client/nail:net - Enable support for network protocols (POP, IMAP and SMTP). If you only need to send mail with the local Transport Agent, disabling this will get you support for only /usr/sbin/sendmail call.
mail-client/nail:ssl - If network is enabled, this adds support for S/MIME and SSL/TLS-powered protocols through dev-libs/openssl.
mail-client/roundcube:enigma - Add dependencies to support server-side GnuPG signing and/or encryption through the enigma plugin
mail-client/roundcube:ldap - Add dependencies to support connecting to an LDAP address book server
mail-client/roundcube:managesieve - Add dependencies to support the sieverules plugin
mail-client/sylpheed:oniguruma - Use dev-libs/oniguruma for regular expression
mail-client/thunderbird:bindist - Disable official Thunderbird branding (icons, name) which are not binary-redistributable according to upstream.
mail-client/thunderbird:crypt - Enable encryption support with enigmail
mail-client/thunderbird:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
mail-client/thunderbird:gtk2 - Use the cairo-gtk2 rendering engine instead of the default cairo-gtk3
mail-client/thunderbird:jemalloc - Enable or disable jemalloc
mail-client/thunderbird:jemalloc3 - Enable or disable jemalloc3 (forced-on when supported prior to 38.0)
mail-client/thunderbird:lightning - Enable app-global calendar support (note 38.0 and above bundles calendar support when this flag is off)
mail-client/thunderbird:minimal - Remove the software development kit and headers
mail-client/thunderbird:mozdom - Enable Mozilla's DOM inspector
mail-client/thunderbird:rust - Enable support for using rust compiler (experimental)
mail-client/thunderbird:system-cairo - Use the system-wide x11-libs/cairo instead of bundled.
mail-client/thunderbird:system-harfbuzz - Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled.
mail-client/thunderbird:system-icu - Use the system-wide dev-libs/icu instead of bundled.
mail-client/thunderbird:system-jpeg - Use the system-wide media-libs/libjpeg-turbo instead of bundled.
mail-client/thunderbird:system-libevent - Use the system-wide dev-libs/libevent instead of bundled.
mail-client/thunderbird:system-libvpx - Use the system-wide media-libs/libvpx instead of bundled.
mail-client/thunderbird:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
mail-client/thunderbird-bin:crashreporter - Enable crash reporter for bugs
mail-client/trojita:password - Store passwords securely via dev-libs/qtkeychain
mail-filter/MailScanner:exim - Set mail-mta/exim to used MTA
mail-filter/MailScanner:postfix - Set mail-mta/postfix to used MTA
mail-filter/MailScanner:spamassassin - Enable usage of mail-filter/spamassassin for spam protection
mail-filter/amavisd-new:courier - Add courier support
mail-filter/amavisd-new:dkim - Add DomainKeys Identified Mail support
mail-filter/amavisd-new:qmail - Add qmail support
mail-filter/amavisd-new:razor - Add support for mail-filter/razor
mail-filter/amavisd-new:spamassassin - Add support for mail-filter/spamassassin
mail-filter/amavisd-new:zmq - Add support for zeromq sockets
mail-filter/ask:procmail - Adds support for mail-filter/procmail
mail-filter/assp:spf - Adds support for Sender Policy Framework
mail-filter/assp:srs - Adds support for Sender Rewriting Scheme
mail-filter/bogofilter:tokyocabinet - Enable Tokyo Cabinet database support
mail-filter/clamassassin:clamd - Use the app-antivirus/clamav daemon for virus checking
mail-filter/clamassassin:subject-rewrite - Adds support for subject rewriting
mail-filter/dcc:rrdtool - Enable net-analyzer/rrdtool interface scripts
mail-filter/dspam:daemon - Enable support for DSPAM to run in --daemon mode
mail-filter/dspam:debug - Enable debugging support (don't enable this unless something needs testing!)
mail-filter/dspam:domain-scale - Build for domain scale setups - puts data to $HOME/data/domain.com/user
mail-filter/dspam:hash - Enable support for the file-orientated hash driver
mail-filter/dspam:large-scale - Build for large scale setups - puts data to $HOME/data/u/s/user
mail-filter/dspam:small-scale - Build for small scale setups - puts data to $HOME/data/user
mail-filter/dspam:user-homedirs - Build with user homedir support
mail-filter/dspam:virtual-users - Build with virtual-users support
mail-filter/libmilter:poll - Use poll instead of select
mail-filter/maildrop:authlib - Add courier-authlib support
mail-filter/maildrop:dovecot - Add dovecot authentication support
mail-filter/maildrop:tools - Install maildirmake and deliverquota tools
mail-filter/maildrop:trashquota - Count deleted messages as part of the maildir quota
mail-filter/mimedefang:poll - Use poll instead of select
mail-filter/opendkim:ldap - Enable openldap as a dataset facilitator or keys, determining domains to sign for, and any other dataset that opendkim supports.
mail-filter/opendkim:lmdb - Add support for using dev-db/lmdb
mail-filter/opendkim:lua - Enables control over signature verification, filtering and policy to be controlled by user defined lua scripts.
mail-filter/opendkim:memcached - Add support for using dev-libs/libmemcached
mail-filter/opendkim:opendbx - Use opendbx backend to facilitate dataset driven OpenDKIM configuration options like stats, bodylengthdb, etc. against a wide variety of database types
mail-filter/opendkim:poll - Use poll() instead of select() for the provided asynchronous resolver library.
mail-filter/opendkim:sasl - Used to authenticate to a LDAP server in various ways if required.
mail-filter/opendkim:unbound - Use the unbound dnssec library to perform DKIM DNS queries.
mail-filter/opendmarc:reports - Install the reports binaries: expire, import, reports, params
mail-filter/opendmarc:spf - Use the mail-filter/libspf2 for Sender Policy Framework checking
mail-filter/opensmtpd-extras:filter-clamav - filter for scanning with app-antivirus/clamav
mail-filter/opensmtpd-extras:filter-dkim-signer - filter for adding DKIM signatures to outgoing messages
mail-filter/opensmtpd-extras:filter-dnsbl - filter for checking hosts against the DNS black lists
mail-filter/opensmtpd-extras:filter-lua - filter for interfacing with dev-lang/lua
mail-filter/opensmtpd-extras:filter-monkey - filter for arbitrarily rejecting random emails
mail-filter/opensmtpd-extras:filter-pause - filter to pause on new connections
mail-filter/opensmtpd-extras:filter-perl - filter for interfacing with dev-lang/perl
mail-filter/opensmtpd-extras:filter-python - filter for interfacing with dev-lang/python
mail-filter/opensmtpd-extras:filter-regex - filter for regular expression matching
mail-filter/opensmtpd-extras:filter-spamassassin - filter for scanning with mail-filter/spamassassin
mail-filter/opensmtpd-extras:filter-stub - stub filter
mail-filter/opensmtpd-extras:filter-trace - trace filter
mail-filter/opensmtpd-extras:filter-void - void filter
mail-filter/opensmtpd-extras:luajit - Use JIT for Lua via dev-lang/luajit instead of dev-lang/lua
mail-filter/opensmtpd-extras:queue-null - null queue
mail-filter/opensmtpd-extras:queue-python - queue for interfacing with dev-lang/python
mail-filter/opensmtpd-extras:queue-ram - ram queue
mail-filter/opensmtpd-extras:queue-stub - stub queue
mail-filter/opensmtpd-extras:scheduler-python - schedulre for interfacing with python
mail-filter/opensmtpd-extras:scheduler-ram - ram scheduler
mail-filter/opensmtpd-extras:scheduler-stub - stub scheduler
mail-filter/opensmtpd-extras:table-ldap - table for lookups with net-nds/openldap
mail-filter/opensmtpd-extras:table-mysql - table for lookups with virtual/mysql
mail-filter/opensmtpd-extras:table-passwd - table for lookups using /etc/passwd
mail-filter/opensmtpd-extras:table-postgres - table for lookups with dev-db/postgresql
mail-filter/opensmtpd-extras:table-python - table for interfacing with dev-lang/python
mail-filter/opensmtpd-extras:table-redis - table for lookups with dev-db/redis
mail-filter/opensmtpd-extras:table-socketmap - table for lookups using a socket map
mail-filter/opensmtpd-extras:table-sqlite - table for lookups with dev-db/sqlite3
mail-filter/opensmtpd-extras:table-stub - stub table
mail-filter/postfwd:tools - Install additional tools for testing postfwd
mail-filter/postgrey:targrey - Enables the targrey patch
mail-filter/qmail-scanner:spamassassin - Build faster mail-filter/spamassassin checks into qmail-scanner
mail-filter/rmilter:dkim - Enable support for DomainKeys Identified Mail
mail-filter/rmilter:memcached - Enable support for memcached
mail-filter/rspamd:fann - Enable neural network plugin (requires sci-mathematics/fann).
mail-filter/rspamd:jemalloc - Use dev-libs/jemalloc for allocations
mail-filter/rspamd:pcre2 - Use dev-libs/libpcre2
mail-filter/spamassassin:bayes - Require a database (MySQL, SQLite, Postgres, or BerkDB) backend to enable the Bayesian filtering database. If you use the Redis backend, you do not need to enable this flag (Redis support is enabled automatically, and has no external dependencies).
mail-filter/spamassassin:cron - Install a cron job to update SpamAssassin's rules daily.
mail-filter/spamassassin:qmail - Build qmail functionality and docs
mail-filter/spamdyke:ssl - Enables TLS protocol for spamdyke
mail-filter/zdkimfilter:debug - Log process and signal information. Also leave the child process running for gdb examination.
mail-filter/zdkimfilter:opendbx - An alternate statistics based storage engine.
mail-mta/courier:fax - Enables fax support in the courier mail server
mail-mta/courier:norewrite - Prevents courier mail server from mangling virtual user addresses when sending
mail-mta/courier:web - Enable the web interface
mail-mta/courier:webmail - Enable the webmail interface
mail-mta/exim:dane - Adds support for DNS-based Authentication of Named Entities
mail-mta/exim:dcc - Adds support for Distributed Checksum Clearinghouse (DCC)
mail-mta/exim:dkim - Adds support for DomainKeys Identified Mail (DKIM)
mail-mta/exim:dlfunc - Install local_scan.h header to compile separate dlfunc libraries
mail-mta/exim:dmarc - Adds support for DMARC
mail-mta/exim:dnsdb - Adds support for a DNS search for a record whose domain name is the supplied query
mail-mta/exim:dovecot-sasl - Adds support for Dovecot's authentication
mail-mta/exim:dsn - Adds support for Delivery Status Notifications (DSN)
mail-mta/exim:exiscan-acl - Patch providing support for content scanning
mail-mta/exim:lmtp - Adds support for lmtp
mail-mta/exim:mbx - Adds support for UW's mbx format
mail-mta/exim:pkcs11 - Require pkcs11 support in net-libs/gnutls with USE=gnutls
mail-mta/exim:prdr - Adds support for Per-Recipient Data Response
mail-mta/exim:proxy - Add support for being behind a proxy, such as HAProxy
mail-mta/exim:redis - Adds support for querying dev-db/redis
mail-mta/exim:spf - Adds support for Sender Policy Framework
mail-mta/exim:srs - Adds support for Sender Rewriting Scheme
mail-mta/exim:tpda - Adds support for Transport Post-Delivery Actions
mail-mta/msmtp:libsecret - Enable libsecret support to store login credentials
mail-mta/msmtp:mta - Enable this to install as system-wide MTA
mail-mta/netqmail:authcram - Enable AUTHCRAM support
mail-mta/netqmail:gencertdaily - Generate SSL certificates daily instead of hourly
mail-mta/netqmail:highvolume - Prepare netqmail for high volume servers
mail-mta/opensmtpd:mta - Enable this to install as system-wide MTA
mail-mta/qmail-ldap:cluster - Enable this if you want to have cluster support in qmail-ldap
mail-mta/qmail-ldap:gencertdaily - Generate SSL certificates daily instead of hourly
mail-mta/qmail-ldap:highvolume - Prepare qmail for high volume servers
mail-mta/qmail-ldap:rfc2307 - Add support for RFC2307 compliant uid/gid attributes
mail-mta/qmail-ldap:rfc822 - Add support for RFC822 compliant mail attributes
mail-mta/qpsmtpd:postfix - create user with permissions for proper postfix interaction
mail-mta/ssmtp:mta - Install symlinks for sendmail-compatible MTA.
mate-base/caja:gtk3 - Build with GTK+3 instead of GTK+2
mate-base/caja:mate - Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment.
mate-base/caja:packagekit - Enable support for installing via app-admin/packagekit based on mimetype
mate-base/libmatekbd:gtk3 - Build with GTK+3 instead of GTK+2
mate-base/mate:base - Install base MATE Desktop applications that are recommended for the most common usage; for example, this installs the file manager. Disable this and other USE flags if you want a more minimal MATE Desktop.
mate-base/mate:extras - Install additional MATE Desktop applications that are recommended for extended usage of the MATE Desktop as upstream sees it; for example, this installs MATE Desktop's office related applications. Disable this if you plan to use your own non-MATE Desktop alternatives or a custom mixture of MATE and non-MATE packages.
mate-base/mate:gtk3 - Build all of MATE DE with GTK+3 instead of GTK+2
mate-base/mate:help - Install gnome-extra/yelp to handle in application help menus and documentation browsing
mate-base/mate:notification - Force notification daemon to default to MATE's notification daemon. Enabled by default. Disable if it causes conflicts with other installed desktop environments.
mate-base/mate:themes - Install MATE Desktop's themes; if you use other themes, you can disable this to spare some space and time.
mate-base/mate-applets:gtk3 - Build with GTK+3 instead of GTK+2
mate-base/mate-applets-meta:appindicator - Pull in mate-extra/mate-indicator-applet for AppIndicator applet
mate-base/mate-applets-meta:gtk3 - Make sure applets are built with GTK+3 instead of GTK+2
mate-base/mate-applets-meta:netspeed - Pull in net-analyzer/mate-netspeed for net speed monitoring applet
mate-base/mate-applets-meta:sensors - Pull in mate-extra/mate-sensors-applet for hw sensors applet
mate-base/mate-control-center:appindicator - Add support for AppIndicator
mate-base/mate-control-center:gtk3 - Build with GTK+3 instead of GTK+2
mate-base/mate-desktop:gtk3 - Build with GTK+3 instead of GTK+2
mate-base/mate-panel:gtk3 - Build with GTK+3 instead of GTK+2
mate-base/mate-session-manager:gtk3 - Build with GTK+3 instead of GTK+2
mate-base/mate-session-manager:xtrans - Build with Xtrans support; WARNING: Disabling this flag will result in ICE binding on all interfaces
mate-base/mate-settings-daemon:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/caja-extensions:cdr - Add an extension to burn files to cds using app-cdr/brasero.
mate-extra/caja-extensions:gajim - Add an extension to support net-im/gajim.
mate-extra/caja-extensions:gksu - Add an extension to support opening files as root with x11-libs/gksu.
mate-extra/caja-extensions:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/caja-extensions:image-converter - Add image conversion support.
mate-extra/caja-extensions:mail - Add an extension to support e-mail functionality.
mate-extra/caja-extensions:open-terminal - Add an extension to support an open terminal.
mate-extra/caja-extensions:pidgin - Add an extension to support net-im/pidgin
mate-extra/caja-extensions:share - Add an extension to support sharing files.
mate-extra/caja-extensions:wallpaper - Add an extension to support setting an image as the current wallpaper
mate-extra/mate-indicator-applet:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-media:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-netbook:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-polkit:accountsservice - Support extraction of data from AccountsService
mate-extra/mate-polkit:appindicator - Add support for AppIndicator
mate-extra/mate-polkit:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-power-manager:applet - Enable building of the MATE applet.
mate-extra/mate-power-manager:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-power-manager:man - Build power manager's man page.
mate-extra/mate-power-manager:pm-utils - Adds support for suspend/resume using sys-power/upower-pm-utils instead of sys-power/upower
mate-extra/mate-screensaver:consolekit - Enable support for sys-auth/consolekit
mate-extra/mate-screensaver:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-sensors-applet:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-system-monitor:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-user-share:gtk3 - Build with GTK+3 instead of GTK+2
mate-extra/mate-utils:applet - Enable the mate dictionary applet
mate-extra/mate-utils:gtk3 - Build with GTK+3 instead of GTK+2
media-fonts/corefonts:tahoma - Also install the Tahoma font. Due to the lack of a free bold variant, this may render badly. See bug 184790.
media-fonts/culmus:ancient - Install ancient semitic scripts
media-fonts/culmus:fancy - Install fancy fonts
media-fonts/culmus:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/culmus:taamey - Install taamey fonts
media-fonts/dejavu:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/fontawesome:otf - Install the OpenType version of the font
media-fonts/fontawesome:ttf - Install the TrueType version of the font
media-fonts/infinality-ultimate-meta:free - Install fonts for the "free" preset
media-fonts/infinality-ultimate-meta:latin - Install additional latin fonts
media-fonts/infinality-ultimate-meta:minimal - Install a minimal set of fonts
media-fonts/infinality-ultimate-meta:ms - Install (free) fonts for the "ms" preset
media-fonts/intlfonts:bdf - Installs BDF fonts in addition to PCF
media-fonts/liberation-fonts:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/montecarlo:bdf - Install BDF fonts in addition to PCF
media-fonts/mplus-outline-fonts:ipafont - Generates new fonts merged with media-fonts/ja-ipafonts
media-fonts/sil-charis:compact - Use more compactly spaced font
media-fonts/sil-gentium:compact - Also install more compact version of the font.
media-fonts/terminus-font:a-like-o - Changes view of letter 'a' - a looks like o (see homepage)
media-fonts/terminus-font:center-tilde - Place the '~' character vertically centered on the line instead of to the top.
media-fonts/terminus-font:distinct-l - ll2 variant with more distinctive l (lowercase L)
media-fonts/terminus-font:pcf - Install Portable Compiled Font (PCF) (required for X11)
media-fonts/terminus-font:pcf-unicode-only - Remove non-unicode PCF fonts that could be problematic. See bug #520222.
media-fonts/terminus-font:psf - Install PC Screen Font (PSF) with unicode data (for linux console)
media-fonts/terminus-font:quote - Changes view of quotes: symmetric ` and ' instead of asymmetric one (see homepage)
media-fonts/terminus-font:raw-font-data - Install RAW font data which should be compatible with most UNIX systems (you don't need this on linux)
media-fonts/terminus-font:ru-dv - Changes view of Russian letters 'de' and 've' (see homepage)
media-fonts/terminus-font:ru-g - Changes view of Russian letter 'ge' (see homepage)
media-fonts/terminus-font:ru-i - Changes view of Russian letter 'i' - not like Latin u, but like "mirrored" N (see homepage)
media-fonts/terminus-font:ru-k - Changes view of Russian letter 'k' (see homepage)
media-fonts/unifont:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/unifont:utils - Install unifont utilities
media-gfx/album:plugins - Install optional plugins
media-gfx/album:themes - Install optional themes
media-gfx/asymptote:boehm-gc - Enables using the Boehm-Demers-Weiser conservative garbage collector
media-gfx/asymptote:offscreen - Enables off-screen rendering
media-gfx/asymptote:sigsegv - Enables using dev-libs/libsigsegv
media-gfx/blender:boost - Enable features depending on boost.
media-gfx/blender:bullet - Enable Bullet (Physics Engine).
media-gfx/blender:collada - Add support for Collada interchange format through media-libs/opencollada.
media-gfx/blender:colorio - Enable OpenColorIO color management through media-libs/opencolorio.
media-gfx/blender:cuda - Build cycles renderer with nVidia CUDA support.
media-gfx/blender:cycles - Build cycles renderer (requires media-libs/openimageio and dev-libs/boost).
media-gfx/blender:dds - Adds DDS textures support to Blender.
media-gfx/blender:doc - Build C and Python API documentation directly from the source code.
media-gfx/blender:elbeem - Adds surface fluid simulation to Blender using El'Beem library.
media-gfx/blender:game-engine - Adds Game Engine support to Blender.
media-gfx/blender:headless - Build without graphical support (renderfarm, server mode only).
media-gfx/blender:jemalloc - Use dev-libs/jemalloc for memory allocation.
media-gfx/blender:llvm - Enable features depending on llvm.
media-gfx/blender:man - Build and install man pages.
media-gfx/blender:ndof - Enable NDOF input devices (SpaceNavigator and friends).
media-gfx/blender:openimageio - Enable OpenImageIO Support
media-gfx/blender:opennl - Enable use of Open Numerical Library
media-gfx/blender:opensubdiv - Add rendering support form OpenSubdiv from Dreamworks Animation through media-libs/opensubdiv.
media-gfx/blender:openvdb - Add GPU preview rendering. Only works with nVidia cards.
media-gfx/blender:player - Build the Blender Player. THis requires the Game engine.
media-gfx/blender:redcode - This flag add support for RED CODE camera digital format (5K HD images *.r3d) - EXPERIMENTAL.
media-gfx/blender:test - Build the provided unit tests.
media-gfx/blender:valgrind - Add support for memory debugging using dev-util/valgrind
media-gfx/comix:rar - Pulls app-arch/unrar for rar file support
media-gfx/cura:usb - Access 3D printers via USB
media-gfx/darktable:colord - Support color management using x11-misc/colord
media-gfx/darktable:flickr - Add support for uploading photos to flickr
media-gfx/darktable:geo - Enable geotagging support
media-gfx/darktable:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
media-gfx/darktable:libsecret - Enable libsecret support to store login credentials
media-gfx/darktable:opencl - Enable opencl support
media-gfx/darktable:pax_kernel - Triggers paxmarking of main darktable binary
media-gfx/darktable:webp - Enable WebP export support
media-gfx/digikam:addressbook - Enable akonadi contact integration
media-gfx/digikam:kipi - Enable support for media-plugins/kipi-plugins
media-gfx/digikam:lensfun - Enable support for media-libs/lensfun
media-gfx/digikam:marble - Enable support for geolocation using kde-apps/marble
media-gfx/digikam:panorama - Build the panorama plugin which requires media-gfx/hugin
media-gfx/digikam:semantic-desktop - Enable kde-frameworks/kfilemetadata support
media-gfx/enblend:gpu - GPU support for Enblend
media-gfx/enblend:image-cache - allow for processing of large images
media-gfx/eog-plugins:flickr - Enable uploading to Flickr
media-gfx/eog-plugins:map - Enable world map display using media-libs/libchamplain
media-gfx/eog-plugins:picasa - Enable uploading to Google's Picasa Web Albums
media-gfx/eom:gtk3 - Build with GTK+3 instead of GTK+2
media-gfx/exact-image:swig - Adds Swig support dev-lang/swig
media-gfx/exiv2:webready - Support reading metadata over the internet
media-gfx/fbida:X - Install the Motif based image viewer "ida"
media-gfx/fbida:fbcon - Install the framebuffer image viewer "fbi"
media-gfx/fbida:ghostscript - Install the framebuffer ghostscript viewer "fbgs"
media-gfx/fbida:webp - Enable support for the WebP image format
media-gfx/fim:dia - Enable DIA file support via app-office/dia
media-gfx/fim:imagemagick - Use convert from media-gfx/imagemagick as fallback file opener
media-gfx/fim:xfig - Enable FIG file support via media-gfx/xfig
media-gfx/fontforge:truetype-debugger - Enable truetype debugger in fontforge
media-gfx/fotowall:webcam - Enable webcam support
media-gfx/freewrl:glew - Enable glew extensions
media-gfx/freewrl:java - Build and install java EAI/SAI support library
media-gfx/freewrl:libeai - Build EAI C library
media-gfx/freewrl:opencl - Enable OpenCL support
media-gfx/freewrl:osc - Allows for OSC-based control and communication between multiple freewrl instances
media-gfx/freewrl:rbp - Enable support for Rigid Body Physics
media-gfx/geeqie:gpu-accel - Enable GPU acceleration support - experimental
media-gfx/geeqie:gtk3 - Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
media-gfx/geeqie:map - Enable items map display - experimental
media-gfx/gimp:smp - Enable support for multiprocessors
media-gfx/gimp:vector-icons - Enable support for vector icons (experimental)
media-gfx/gmic:cli - Build CLI interface
media-gfx/gmic:opencv - Enable support for webcams using the OpenCV library
media-gfx/graphicsmagick:fpx - Enable FlashPix support with media-libs/libfpx
media-gfx/graphicsmagick:modules - Compile graphicsmagick with dynamically loadable modules
media-gfx/graphicsmagick:q16 - Set storage quantum size to 16 (~2*memory)
media-gfx/graphicsmagick:q32 - Set storage quantum size to 32 (~5*memory)
media-gfx/graphicsmagick:webp - Enable support for webp image format
media-gfx/graphviz:X - Builds lefty front-end, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo)
media-gfx/graphviz:devil - Enables DevIL output plugin -Tdevil
media-gfx/graphviz:gdk-pixbuf - Enables gdk-pixbuf2 plugin
media-gfx/graphviz:gtk - Enables gtk+ output plugin -Tgtk (needs cairo)
media-gfx/graphviz:gts - Enables support for gts
media-gfx/graphviz:lasi - Enables PostScript output via media-libs/lasi, for plugin -Tlasi (needs cairo)
media-gfx/graphviz:qt4 - Builds gvedit front-end
media-gfx/gthumb:http - Enable webservice integration through net-libs/libsoup
media-gfx/gthumb:json - Compile code that uses the libjson-glib library
media-gfx/gthumb:slideshow - Enable slideshow plugin
media-gfx/gthumb:webp - Enable support for webp image format
media-gfx/hugin:sift - automatically align images with media-gfx/autopano-sift-C
media-gfx/imagemagick:corefonts - Use media-fonts/corefonts which is required by some commands
media-gfx/imagemagick:fpx - Enable media-libs/libfpx support
media-gfx/imagemagick:hdri - enable High Dynamic Range Images formats
media-gfx/imagemagick:lqr - Enable experimental liquid rescale support using media-libs/liblqr
media-gfx/imagemagick:opencl - Enable OpenCL support
media-gfx/imagemagick:pango - Enable Pango support using x11-libs/pango
media-gfx/imagemagick:q32 - Set quantum depth value to 32
media-gfx/imagemagick:q64 - Set quantum depth value to 64
media-gfx/imagemagick:q8 - Set quantum depth value to 8
media-gfx/imagemagick:webp - Enable webp image format support using media-libs/libwebp
media-gfx/imageworsener:webp - enable webp image format support
media-gfx/inkscape:cdr - Enable support for CorelDRAW Diagrams
media-gfx/inkscape:dia - pull in app-office/dia for dia import extension
media-gfx/inkscape:inkjar - Enable support for OpenOffice.org SVG jar files
media-gfx/inkscape:latex - pull in dependencies for LaTeX formulas
media-gfx/inkscape:visio - Enable support for Microsoft Visio Diagrams
media-gfx/inkscape:wpg - Enable support for WordPerfect Graphics
media-gfx/iscan-plugin-gt-f500:minimal - Install the firmware only, and not the plugin.
media-gfx/jpeg2ps:metric - Default to A4 paper size
media-gfx/k3d:3ds - Enable support for 3D Studio models
media-gfx/k3d:cuda - Use nvidia cuda toolkit for speeding up computations
media-gfx/k3d:gts - Add Support for the GNU Triangulated Surface Library sci-libs/gts
media-gfx/kphotoalbum:face - Enable face detection and recognition using kde-apps/libkface
media-gfx/kphotoalbum:kipi - Support for the KDE Image Plugin Interface
media-gfx/kphotoalbum:map - Enable map display support using kde-apps/libkgeomap
media-gfx/krita:color-management - Enable color management via media-libs/opencolorio
media-gfx/krita:qtmedia - Enable sound support for animations via dev-qt/qtmultimedia
media-gfx/krita:vc - Enable support for dev-libs/vc, could be a significant speed boost
media-gfx/librecad:3d - Require all 2D coordinates stored as 3D
media-gfx/librecad:tools - Build additional tool programs: tff2lff
media-gfx/luminance-hdr:fits - Enable support for the FITS format
media-gfx/nip2:goffice - use x11-libs/goffice to show plots
media-gfx/nomacs:opencv - Build support for media-libs/opencv
media-gfx/nomacs:zip - Build support for zip archives
media-gfx/nvidia-texture-tools:cg - Enable NVIDIA C graphics compiler toolkit plug-in
media-gfx/nvidia-texture-tools:cuda - Enable NVIDIA CUDA toolkit support
media-gfx/nvidia-texture-tools:glew - Enable support for The OpenGL Extension Wrangler Library (media-libs/glew)
media-gfx/openclipart:gzip - Compresses clip art using gzip
media-gfx/openexr_viewers:cg - Add support for nvidia's cg shaders
media-gfx/openvdb:abi3-compat - Enables compatibility with the old 3.x ABI. enabled by dfault.
media-gfx/openvdb:openvdb-compression - Adds enhanced compression to files through dev-libs/c-blosc. Very useful so enabled by dfault.
media-gfx/photoqt:exiv2 - Use media-gfx/exiv2 as optional dependency
media-gfx/pngcrush:system-libs - Use libpng and libz provided by system
media-gfx/potrace:metric - default to a4 paper size and metric measurement
media-gfx/povray:io-restrictions - POV-Ray's mechanism for control of I/O operations
media-gfx/povray:mkl - Enable support for Intel Vector Math Library, part of sci-libs/mkl
media-gfx/pqiv:archive - Enable support for images in archives and cbX comic book files
media-gfx/pstoedit:emf - Enable media-libs/libemf support
media-gfx/pstoedit:flash - Enable media-libs/ming SWF support
media-gfx/pstoedit:pptx - Enable support for generating PowerPoint pptx files
media-gfx/qiv:magic - Use libmagic to determine mimetypes
media-gfx/qiviewer:webp - Build support for WEBP image format
media-gfx/simple-scan:colord - Support color management using x11-misc/colord
media-gfx/slic3r:gui - Enable GUI
media-gfx/splashutils:fbcondecor - Support for the fbcondecor kernel patch.
media-gfx/ufraw:contrast - enable contrast setting option
media-gfx/ufraw:fits - Enable support for the FITS image format through sci-libs/cfitsio
media-gfx/ufraw:timezone - enable DST correction for file timestamps
media-gfx/xpaint:pgf - Support for loading PGF images
media-gfx/xsane:ocr - Enable support for Optical Character Recognition reader
media-gfx/yafaray:blender - install media-gfx/blender scripts
media-libs/a52dec:djbfft - Prefer D.J. Bernstein's library for fourier transforms
media-libs/allegro:dumb - Enable media-libs/dumb module library support
media-libs/allegro:physfs - Enable physfs support
media-libs/allegro:vga - Enables the VGA graphics driver
media-libs/alsa-lib:alisp - Enable support for ALISP (ALSA LISP) interpreter for advanced features.
media-libs/alure:dumb - Enable media-libs/dumb module library support
media-libs/alure:fluidsynth - Enables Fluidsynth MIDI software synthesis
media-libs/assimp:boost - Build assimp with boost support
media-libs/assimp:samples - Build viewer library
media-libs/assimp:tools - Build assimp tool binary
media-libs/aubio:double-precision - Compile in double precision mode.
media-libs/avidemux-core:system-ffmpeg - Use the ffmpeg provided by the system.
media-libs/avidemux-plugins:aften - Enable A/52 (AC-3) audio encoder support.
media-libs/avidemux-plugins:amr - Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.
media-libs/avidemux-plugins:fribidi - Enable unicode bidirectional algorithm support via dev-libs/fribidi.
media-libs/avidemux-plugins:twolame - Enable TwoLAME support via media-sound/twolame, an optimised MPEG Audio Layer 2 (MP2) encoder.
media-libs/avidemux-plugins:vpx - Enable WebM VP8 Codec SDK support via media-libs/libvpx.
media-libs/babl:cpu_flags_x86_f16c - Take advantage of CPU feature f16c
media-libs/cal3d:16bit-indices - Enables use of 16bit indices
media-libs/chromaprint:tools - Build and install fpcalc and fpcollect tools
media-libs/clutter:egl - Enable EGL backend.
media-libs/clutter:gtk - Use gdk-pixbuf from x11-libs/gtk+ as image rendering backend
media-libs/cogl:gles2 - Enable OpenGL ES 2.0 support
media-libs/cogl:kms - Enable KMS support.
media-libs/cogl:pango - Build cogl-pango library for x11-libs/pango integration
media-libs/coin:simage - Texture loading via media-libs/simage library
media-libs/devil:allegro - Add support for Allegro
media-libs/devil:nvtt - Add support for media-gfx/nvidia-texture-tools
media-libs/elementary:quicklaunch - Enable quick-launch support
media-libs/embree:imagemagick - Enables BMP, GIF, PNG, TGA, TIFF image codecs.
media-libs/embree:ispc - Enables support for the Intel SPMD Program Compiler.
media-libs/embree:jpeg - Enables JPEG image codecs.
media-libs/embree:openexr - Enables OpenEXR image codecs.
media-libs/embree:png - Enables PNG image codecs.
media-libs/esdl:image - Enable image support
media-libs/faad2:digitalradio - Digital Radio Mondiale (warning: disables other decoders)
media-libs/flickcurl:raptor - Use media-libs/raptor for proper RDF serializing
media-libs/fontconfig-infinality:nyx - Additional style using croscorefonts
media-libs/freetype:adobe-cff - Use Adobe CFF as default font-renderer
media-libs/freetype:bindist - Disable ClearType support (see http://freetype.org/patents.html)
media-libs/freetype:bzip2 - Support bzip2 compressed PCF fonts.
media-libs/freetype:cleartype_hinting - New bytecode hinting mode for TrueType fonts that activates subpixel hinting (a.k.a. ClearType hinting) by default
media-libs/freetype:fontforge - Install internal headers required for TrueType debugger in media-gfx/fontforge (built with USE=truetype-debugger)
media-libs/freetype:harfbuzz - Use media-libs/harfbuzz for auto-hinting OpenType fonts. WARNING: may trigger circular dependencies!
media-libs/freetype:infinality - Enable infinality options for improved LCD filtering
media-libs/freetype:utils - Install utilities and examples from ft2demos
media-libs/freeverb3:audacious - Build Audacious plugin
media-libs/freeverb3:forcefpu - Disable assembly code
media-libs/freeverb3:plugdouble - Build plugins in double precision mode (default is float)
media-libs/ganv:fdgl - Use experimental force-directed graph layout
media-libs/gd:webp - Enable support for the webp format
media-libs/gegl:lensfun - Enable support for media-libs/lensfun.
media-libs/gegl:umfpack - Enable sparse solving via sci-libs/umfpack.
media-libs/gegl:webp - Enable support for media-libs/libwebp
media-libs/giflib:rle - Build converters for RLE format (utah raster toolkit)
media-libs/glfw:egl - Use EGL instead of GLX for GL context creation
media-libs/gmtk:dconf - Enable support for gnome-base/dconf
media-libs/grilo:network - Enable network access for media discovery using net-libs/libsoup
media-libs/grilo:playlist - Enable support for playlists through dev-libs/totem-pl-parser
media-libs/gst-plugins-bad:bzip2 - Enable bzip2 encoder/decoder plugin
media-libs/gst-plugins-bad:egl - Enable EGL support
media-libs/gst-plugins-bad:gles2 - Enable GLES2 support
media-libs/gst-plugins-base:ivorbis - Enable integer based vorbis decoder
media-libs/gst-plugins-base:pango - Enable pango GStreamer plugin
media-libs/gstreamer:orc - Disable some PaX memory protections to allow plugins that use dev-lang/orc for runtime optimization to be used on hardened PaX systems
media-libs/gstreamer:unwind - Enable sys-libs/libunwind usage for better backtrace support in leaks tracer module
media-libs/harfbuzz:glib - Compile with GLib Unicode support
media-libs/harfbuzz:graphite - Use graphite to render complex non-Roman writing systems
media-libs/jbig2enc:webp - Add support for WEBP image format
media-libs/leptonica:utils - Install command-line utilities
media-libs/leptonica:webp - Adds support for the WebP image format
media-libs/libafterimage:shaping - Use MIT shaped X windows extention.
media-libs/libafterimage:shm - Use MIT shared memory extention for X image transfer.
media-libs/libaom:svc - Enable spatial-svc support (experimental)
media-libs/libass:enca - Enables support for charset discovery and conversion.
media-libs/libass:harfbuzz - Enables OpenType shaping via media-libs/harfbuzz.
media-libs/libbdplus:aacs - Add support for decryption of AACS
media-libs/libbluray:aacs - Add support for decryption of AACS
media-libs/libbluray:bdplus - Use media-libs/libbdplus for BD+ decryption
media-libs/libbluray:java - Add support for BD-J
media-libs/libbluray:udf - Add UDF (Universal Disk Format) support
media-libs/libbluray:utils - Install command-line utilities and examples
media-libs/libcanberra:alsa - Enables ALSA sound driver.
media-libs/libcanberra:gstreamer - Enables gstreamer sound driver. Not useful when alsa or pulseaudio is available.
media-libs/libcanberra:gtk - Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.
media-libs/libcanberra:gtk3 - Enables building of gtk+3 helper library, gtk+3 runtime sound effects and the canberra-gtk-play utility. To enable the gtk+3 sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.
media-libs/libcanberra:pulseaudio - Enables PulseAudio sound driver that should be able to support positional event sounds. This is the preferred choice for best sound events experience and picked by default if compiled in and possible to use at runtime.
media-libs/libcanberra:sound - Install x11-themes/sound-theme-freedesktop to get sounds on Gnome and Xfce.
media-libs/libcanberra:tdb - Enables Trivial Database support for caching purposes.
media-libs/libde265:tools - Install addtional tools, require USE=qt4 or qt5
media-libs/libextractor:archive - Enable archive support using app-arch/libarchive
media-libs/libextractor:gsf - Enable OLE2 (MS Office) plug-in support using gnome-extra/libgsf
media-libs/libextractor:magic - Enable magic support using sys-apps/file
media-libs/libextractor:midi - Enable MIDI support through media-libs/libsmf
media-libs/libffado:qt4 - Install qt4-based mixer frontend
media-libs/libffado:test-programs - Install standalone test programs
media-libs/libggi:vis - Enables sparc vis support for libggi
media-libs/libgphoto2:serial - Enable serial port support
media-libs/libgpod:gtk - Enable ArtworkDB support
media-libs/libgroove:chromaprint - Enable audio fingerprinting using media-libs/chromaprint.
media-libs/libgroove:loudness - Enable loudness detection according to the EBU R128 standard using media-libs/libebur128.
media-libs/libgroove:sound - Enable audio playing.
media-libs/liblastfm:fingerprint - Build the lastfm-fingerprint library
media-libs/libmp4v2:utils - Install command-line utilities
media-libs/libmypaint:gegl - Add support for media-libs/gegl
media-libs/libomxil-bellagio:audioeffects - enable audio volume/mixer effects components
media-libs/libomxil-bellagio:clocksrc - enable clock component
media-libs/libomxil-bellagio:videoscheduler - enable xvideosink video scheduler
media-libs/libpagemaker:tools - Build command line file format conversion tools
media-libs/libpng:apng - support unofficial APNG (Animated PNG) spec
media-libs/libpostproc:pic - Force shared libraries to be built as PIC (this is slower).
media-libs/libquicktime:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec)
media-libs/libraw:demosaic - Enable support for external interpolation algorithms
media-libs/libsdl:joystick - Control joystick support (disable at your own risk)
media-libs/libsdl:sound - Control audio support (disable at your own risk)
media-libs/libsdl:tslib - Build with tslib support for touchscreen devices
media-libs/libsdl:video - Control video support (disable at your own risk)
media-libs/libsdl2:fusionsound - use FusionSound audio driver
media-libs/libsdl2:gles - include OpenGL ES support
media-libs/libsdl2:haptic - Enable the haptic (force feedback) subsystem
media-libs/libsdl2:joystick - Control joystick support (disable at your own risk)
media-libs/libsdl2:sound - Control audio support (disable at your own risk)
media-libs/libsdl2:tslib - Build with tslib support for touchscreen devices
media-libs/libsdl2:video - Control video support (disable at your own risk)
media-libs/libvisio:tools - Build conversion tools
media-libs/libvpx:highbitdepth - Enable 10 and 12 bit support for VP9.
media-libs/libvpx:postproc - Enable additional post processing filters
media-libs/libvpx:svc - Enable spatial-svc support (experimental)
media-libs/libwebp:experimental - Build with -DWEBP_EXPERIMENTAL_FEATURES
media-libs/libwebp:swap-16bit-csp - Enable byte swapping for 16 bit colorspace
media-libs/libyami:dmabuf - Enable dma_buf buffer sharing.
media-libs/libyami:egl - Enable EGL support.
media-libs/libyami:md5 - Add support for generating md5 sums for each frame.
media-libs/libyami:v4l - Add support for V4L2 hardware codecs.
media-libs/libzmf:tools - Build conversion tools
media-libs/lilv:dyn-manifest - Add LV2 Dynamic Manifest support. See http://lv2plug.in/ns/ext/dynmanifest/
media-libs/lv2:plugins - Enables examples plugins.
media-libs/lvtk:gtk2 - Enable x11-libs/gtk+:2 based GUI support
media-libs/lvtk:tools - Compile and install ttl2c tool
media-libs/mediastreamer:amr - Use of AMR Narrow Band codec plugin
media-libs/mediastreamer:filters - Enable compilation of filters
media-libs/mediastreamer:g726 - Support g726 codec
media-libs/mediastreamer:g729 - Use g726 codec plugin
media-libs/mediastreamer:ilbc - Use of iLBC (RFC3951) codec plugin
media-libs/mediastreamer:ntp-timestamp - Turn on NTP timestamping on received packet
media-libs/mediastreamer:opus - Enable opus codec support
media-libs/mediastreamer:ortp - Enable usage of net-libs/ortp
media-libs/mediastreamer:pcap - Enable usage of net-libs/libpcap
media-libs/mediastreamer:silk - Use silk (skype protocol) codec plugin
media-libs/mediastreamer:video - Enable video support
media-libs/mesa:bindist - Disable patent-encumbered ARB_texture_float, EXT_texture_shared_exponent, and EXT_packed_float extensions.
media-libs/mesa:classic - Build drivers based on the classic architecture.
media-libs/mesa:d3d9 - Enable Direct 3D9 API through Nine state tracker. Can be used together with patched wine.
media-libs/mesa:dri3 - Enable DRI3 support.
media-libs/mesa:egl - Enable EGL support.
media-libs/mesa:gallium - Build drivers based on Gallium3D, the new architecture for 3D graphics drivers.
media-libs/mesa:gbm - Enable the Graphics Buffer Manager for EGL on KMS.
media-libs/mesa:gcrypt - Use dev-libs/libgcrypt for low level sha1 utility functions.
media-libs/mesa:gles1 - Enable GLESv1 support.
media-libs/mesa:gles2 - Enable GLESv2 support.
media-libs/mesa:libressl - Use dev-libs/libressl for low level sha1 utility functions.
media-libs/mesa:llvm - Enable LLVM backend for Gallium3D.
media-libs/mesa:nettle - Use dev-libs/nettle for low level sha1 utility functions.
media-libs/mesa:opencl - Enable the Clover Gallium OpenCL state tracker.
media-libs/mesa:openmax - Enable OpenMAX video decode/encode acceleration for Gallium3D.
media-libs/mesa:openssl - Use dev-libs/openssl for low level sha1 utility functions. May cause issues with games from Steam.
media-libs/mesa:osmesa - Build the Mesa library for off-screen rendering.
media-libs/mesa:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
media-libs/mesa:pic - disable optimized assembly code that is not PIC friendly
media-libs/mesa:valgrind - Compile in valgrind memory hints
media-libs/mesa:vdpau - Enable the VDPAU acceleration interface for the Gallium3D Video Layer.
media-libs/mesa:vulkan - Enable Vulkan drivers
media-libs/mesa:wayland - Enable support for dev-libs/wayland
media-libs/mesa:xa - Enable the XA (X Acceleration) API for Gallium3D.
media-libs/mesa:xvmc - Enable the XvMC acceleration interface for the Gallium3D Video Layer.
media-libs/mlt:compressed-lumas - Compress the luma files in png.
media-libs/mlt:frei0r - Build the module for media-plugins/frei0r-plugins
media-libs/mlt:kdenlive - Build support for kde-apps/kdenlive
media-libs/mlt:lua - Build SWIG bindings for Lua
media-libs/mlt:melt - Build the melt commandline tool
media-libs/mlt:opencv - Build motion tracking module using media-libs/opencv
media-libs/mlt:python - Build SWIG bindings for Python
media-libs/mlt:rtaudio - Builds rtaudio consumer for native audio support on multiple platforms.
media-libs/mlt:ruby - Build SWIG bindings for Ruby
media-libs/netpbm:rle - Build converters for the RLE format (utah raster toolkit)
media-libs/opencolorio:pdf - Install extra documentation in PDF format
media-libs/opencv:contrib - Install user contributed scripts from opencv_contrib (Experimental!)
media-libs/opencv:contrib_cvv - CVV module requires Qt5
media-libs/opencv:contrib_hdf - HDF module requires sci-libs/hdf5
media-libs/opencv:contrib_sfm - SFM module requires eigen, gflags, and glog
media-libs/opencv:cuda - Enable NVIDIA Cuda computations support
media-libs/opencv:eigen - Enable usage of dev-cpp/eigen for computations
media-libs/opencv:gdal - Enable support for sci-libs/gdal library
media-libs/opencv:gflags - Use Google's C++ argument parsing library
media-libs/opencv:glog - Use Google's C++ loggin library
media-libs/opencv:ipp - Enable Intel Integrated Primitive support
media-libs/opencv:opencl - Add support for OpenCL
media-libs/opencv:tesseract - Use Google's OCR Engine
media-libs/opencv:testprograms - Build and install programs for testing OpenCV (performance)
media-libs/opencv:vtk - Build new 3D visualization module viz based on sci-libs/vtk
media-libs/opencv:webp - Enable support for webp image format
media-libs/openh264:plugin - Install the Gecko Media Plugin (GMP) for use with Mozilla packages
media-libs/openh264:utils - Install the CLI encoder and decoder utilities
media-libs/openimageio:colorio - Use media-libs/opencolorio
media-libs/openimageio:opencv - Use media-libs/opencv
media-libs/openimageio:tbb - Use dev-cpp/tbb
media-libs/opensubdiv:cuda - Enable NVIDIA CUDA Toolkit support through dev-util/nvidia-cuda-toolkit.
media-libs/opensubdiv:opencl - Enable OpenCL support through virtual/opencl.
media-libs/opensubdiv:ptex - Adds support for faster per-face texture mapping through media-libs/ptex.
media-libs/opensubdiv:tbb - Enable multithreading with the Intel Threads Building Blocks through dev-cpp/tbb.
media-libs/opensubdiv:tutorials - 
media-libs/opus:ambisonics - Enable ambisonics support (experimental).
media-libs/opus:custom-modes - Build with custom-modes.
media-libs/opusfile:fixed-point - Enable fixed-point arithmetic operations
media-libs/opusfile:float - Enable floating point arithmetic operations
media-libs/opusfile:http - Enable http connections
media-libs/phonon:designer - Install plugin for dev-qt/designer
media-libs/phonon:vlc - Install VLC Phonon backend
media-libs/phonon:zeitgeist - Add support for Zeitgeist event tracking system
media-libs/phonon-gstreamer:network - Enable network streaming support via libsoup
media-libs/portmidi:test-programs - Install various example programs
media-libs/quvi:json - Enable support for JSON output
media-libs/raptor:json - Enable support for JSON parsing
media-libs/raspberrypi-userland-bin:hardfp - Use armv6 hardfp ABI
media-libs/sdif:ftruncate - Enables usage of ftruncate v. truncate
media-libs/sdl-image:webp - support loading WEBP images
media-libs/sdl-mixer:fluidsynth - Use media-sound/fluidsynth for MIDI support
media-libs/sdl-mixer:midi - basic support for MIDI files
media-libs/sdl-mixer:mod - basic support for MOD files
media-libs/sdl-mixer:playtools - Install playwave and playmus tools (useful for testing)
media-libs/sdl-mixer:smpeg - Use media-libs/smpeg for MP3 support
media-libs/sdl-mixer:wav - support WAVE files
media-libs/sdl-sound:physfs - Enable physfs support
media-libs/sdl2-image:webp - support loading WEBP images
media-libs/sdl2-mixer:fluidsynth - Use media-sound/fluidsynth for MIDI support
media-libs/sdl2-mixer:midi - basic support for MIDI files
media-libs/sdl2-mixer:mod - basic support for MOD files
media-libs/sdl2-mixer:playtools - Install playwave and playmus tools (useful for testing)
media-libs/sdl2-mixer:smpeg - Use media-libs/smpeg for MP3 support
media-libs/sdl2-mixer:tremor - enable OGG Vorbis music via libtremor
media-libs/sdl2-mixer:wav - support WAVE files
media-libs/sge:image - enable sdl-image support
media-libs/silgraphite:pango - Enables the pango-graphite pango module.
media-libs/spandsp:fixed-point - Enable fixed point support
media-libs/speex:armv5te - Enables optimizations for armv5te processors.
media-libs/speex:utils - Enables speex commandline utilities (speexenc, speexdec).
media-libs/speex:vbr - Enable VBR support.
media-libs/svgalib:kernel-helper - Build the helper kernel module
media-libs/taglib:asf - Provide support for Microsoft's 'advanced systems format' media container.
media-libs/taglib:boost - Use dev-libs/boost instead of GCC built-ins
media-libs/tremor:low-accuracy - enable 32bit only multiply operations
media-libs/vigra:valgrind - Enable valgrind in make check
media-libs/vips:fits - Enable support for the FITS image format through sci-libs/cfitsio
media-libs/vips:matio - Enable support for reading images from Matlab files through sci-libs/matio
media-libs/waffle:egl - Enable EGL support
media-libs/waffle:gbm - Enable support for the Generic Buffer Manager (gbm)
media-libs/waffle:wayland - Enable Wayland support
media-libs/x264:10bit - Set output bit depth to 10, this may not be compatible with all decoders
media-libs/x264:interlaced - enable interlaced encoding support, this can decrease encoding speed by up to 2%
media-libs/x264:opencl - Add support for OpenCL.
media-libs/x264:pic - disable optimized assembly code that is not PIC friendly
media-libs/x265:10bit - Add support for producing 10bits HEVC.
media-libs/x265:12bit - Add support for producing 12bits HEVC.
media-libs/x265:numa - Build with support for NUMA nodes.
media-libs/x265:pic - Disable optimized assembly code that is not PIC friendly
media-libs/xine-lib:bluray - Enable playback of Blu-ray filesystems using media-libs/libbluray
media-libs/xine-lib:dxr3 - Enable support for DXR3 mpeg acceleration cards.
media-libs/xine-lib:flac - Build the media-libs/flac based FLAC demuxer and decoder. This flag is not needed for playing FLAC content, neither standalone nor in Ogg container (OggFLAC), but might have better support for exotic features like 24-bit samples or 96kHz sample rates.
media-libs/xine-lib:fusionsound - Enable support for the Fusion audio sub system
media-libs/xine-lib:gtk - Build the gdkpixbuf-based image decoder plugin.
media-libs/xine-lib:imagemagick - Build the ImageMagick-based image decoder plugin.
media-libs/xine-lib:mad - Build the media-libs/libmad based mp3 decoder. This mp3 decoder has superior support compared to the one coming from FFmpeg that is used as a fallback. If you experience any bad behaviour with mp3 files (skipping, distorted sound) make sure you enabled this USE flag.
media-libs/xine-lib:mmap - Use mmap() function while reading file from local disks. Using mmap() will use more virtual memory space, but leaves to the Kernel the task of caching the file's data. mmap() access should be faster, but might misbehave if the device where the file resides in is removed during playback.
media-libs/xine-lib:truetype - Use media-libs/freetype for font rendering and media-libs/fontconfig for font discovery. Enabling this USE flag will allow OSD (such as subtitles) to use more advanced font and to more easily select which font to use. The support for TrueType fonts in xine-lib is still experimental, and might not be as good looking as the bitmap fonts used with this USE flag disabled.
media-libs/xine-lib:vdr - Build the VDR plugin
media-libs/xine-lib:vidix - Enable support for vidix video output.
media-libs/xine-lib:vis - Adds support for SIMD optimizations for UltraSPARC processors.
media-libs/xine-lib:vpx - Enable VP8 codec support via media-libs/libvpx.
media-libs/xine-lib:xvmc - Enable support for XVideo Motion Compensation (accelerated mpeg playback).
media-libs/xvid:pic - disable optimized assembly code that is not PIC friendly
media-plugins/audacious-plugins:adplug - Build with AdPlug (Adlib sound card emulation) support
media-plugins/audacious-plugins:bs2b - Enable Bauer Bauer stereophonic-to-binaural headphone filter
media-plugins/audacious-plugins:cue - Support CUE sheets using the libcue library
media-plugins/audacious-plugins:fluidsynth - Support FluidSynth as MIDI synth backend
media-plugins/audacious-plugins:gtk3 - Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
media-plugins/audacious-plugins:http - Support HTTP streams through neon
media-plugins/audacious-plugins:midi - Build with amidi-plug (MIDI synth) support
media-plugins/audacious-plugins:scrobbler - Build with scrobbler/LastFM submission support
media-plugins/audacious-plugins:sid - Build with SID (Commodore 64 Audio) support
media-plugins/calf:lv2 - Add support for Ladspa V2
media-plugins/deadbeef-plugins-meta:archive - Reading media files from archived files
media-plugins/deadbeef-plugins-meta:bookmark-manager - Resume playing files (after closing player) from the last timestamp
media-plugins/deadbeef-plugins-meta:bs2b - bs2b dsp support. Useful for headphones
media-plugins/deadbeef-plugins-meta:decast - Subscription for the podcasts
media-plugins/deadbeef-plugins-meta:filebrowser - File browser plugin
media-plugins/deadbeef-plugins-meta:gnome-mmkeys - Gnome multimedia keys support
media-plugins/deadbeef-plugins-meta:infobar - Download and show lyrics
media-plugins/deadbeef-plugins-meta:jack - Jack audio support
media-plugins/deadbeef-plugins-meta:librarybrowser - File browser plugin that resemble foobar2k music library
media-plugins/deadbeef-plugins-meta:mpris - MPRIS support
media-plugins/deadbeef-plugins-meta:musical-spectrum - Draws musical spectrum for current track
media-plugins/deadbeef-plugins-meta:opus - Ogg opus decoder support
media-plugins/deadbeef-plugins-meta:quick-search - Quick search support
media-plugins/deadbeef-plugins-meta:replaygain-control - Advanced control of replaygain
media-plugins/deadbeef-plugins-meta:soxr - Sox resampler
media-plugins/deadbeef-plugins-meta:spectrogram - Draws spectrogram for current track
media-plugins/deadbeef-plugins-meta:statusnotifier - Provides tray icon in plasma5 (implements StatusNotifierItem)
media-plugins/deadbeef-plugins-meta:stereo-widener - Widens stereo
media-plugins/deadbeef-plugins-meta:vk - Play music from vk.com social network
media-plugins/deadbeef-plugins-meta:vu-meter - Draws vu meter for current track
media-plugins/deadbeef-plugins-meta:waveform-seekbar - Draws waveform seekbar for current track
media-plugins/frei0r-plugins:facedetect - Enables building of facedetect plugin, which depends on media-libs/opencv
media-plugins/frei0r-plugins:scale0tilt - Enables building of scale0tilt and vectorscope plugins, which depend on media-libs/gavl
media-plugins/gkrellmpc:threads - Use separate thread to init connection (unsafe)
media-plugins/grilo-plugins:chromaprint - Enable Chromaprint support
media-plugins/grilo-plugins:daap - Enable dmap support through net-libs/libdmapsharing
media-plugins/grilo-plugins:flickr - Enable Flickr support
media-plugins/grilo-plugins:freebox - Build support for viewing TV channels using Freebox
media-plugins/grilo-plugins:gnome-online-accounts - Enable net-libs/gnome-online-accounts support
media-plugins/grilo-plugins:pocket - Support for showing content from Pocket
media-plugins/grilo-plugins:subtitles - Enables support for subtitle from OpenSubtitles
media-plugins/grilo-plugins:thetvdb - Build support for thetvdb.com
media-plugins/grilo-plugins:tracker - Build support for content discovery using the app-misc/tracker indexer
media-plugins/grilo-plugins:vimeo - Build support for Vimeo content discovery using net-libs/libsoup and dev-libs/libgcrypt
media-plugins/grilo-plugins:youtube - Build support for YouTube content discovery using dev-libs/libgdata
media-plugins/gst-plugins-gl:libvisual - Enable visualization effects via media-libs/libvisual
media-plugins/gst-plugins-meta:http - Enable http streaming via net-libs/libsoup
media-plugins/gst-plugins-meta:libvisual - Enable visualization effects via media-libs/libvisual
media-plugins/gst-plugins-meta:opus - Enable Opus audio codec support
media-plugins/gst-plugins-meta:vpx - Enables vp8 codec support using libvpx, required to play some HTML5 videos
media-plugins/gst-plugins-vaapi:drm - Enable DRM renderer
media-plugins/gst-plugins-vaapi:egl - Enable EGL support
media-plugins/hexter:gtk2 - Enable x11-libs/gtk+:2 based GUI
media-plugins/imlib2_loaders:eet - Enable Eet image loader
media-plugins/imlib2_loaders:xcf - Enable XCF image loader
media-plugins/kipi-plugins:flashexport - Build the flash export plugin
media-plugins/kipi-plugins:mediawiki - Build the mediawiki export plugin
media-plugins/kipi-plugins:remotestorage - Build plugin for remote storage using network protocols such as FTP, SSH, SAMBA via kde-frameworks/kio
media-plugins/kipi-plugins:vkontakte - Build plugin for vkontakte.ru
media-plugins/mediastreamer-ilbc:20ms-frames - enable 20ms frame size (default is 30ms). Some VOIP providers such as Gizmo5 (aka Sipphone) require the codec to be compiled with the 30ms setting.
media-plugins/mythplugins:cdr - Allows MythMusic to burn CD-Rs
media-plugins/mythplugins:exif - Allows MythGallery to read EXIF data from photos
media-plugins/mythplugins:fftw - Adds visual effects to MythMusic when playing back music
media-plugins/mythplugins:hls - HTTP Live Streaming support
media-plugins/mythplugins:mytharchive - Allows you to archive recorded content to CD or DVD
media-plugins/mythplugins:mythbrowser - Adds a web browser within MythTV
media-plugins/mythplugins:mythgallery - Adds a picture viewing gallery within MythTV
media-plugins/mythplugins:mythgame - Adds a frontend to various ROM emulators within MythTV
media-plugins/mythplugins:mythmusic - Adds the ability for MythTV to act as a music player
media-plugins/mythplugins:mythnetvision - Adds the ability to view netvision devices within MythTV
media-plugins/mythplugins:mythnews - Adds a news viewer within MythTV
media-plugins/mythplugins:mythweather - Adds weather information within MythTV
media-plugins/mythplugins:mythzoneminder - Adds support for zoneminder (requires a server with the appropriate mythtv daemon somewhere on the network).
media-plugins/mythplugins:raw - Allows MythGallery to view photos saved in RAW format
media-plugins/vdr-burn:dvdarchive - DMH DVD - Archive
media-plugins/vdr-epgsearch:conflictcheckonly - ToDo
media-plugins/vdr-epgsearch:epgsearchonly - ToDo
media-plugins/vdr-epgsearch:quicksearch - ToDo
media-plugins/vdr-epgsearch:tre - Add support for unlimited fuzzy searching with help of dev-libs/tre library
media-plugins/vdr-graphtft:graphtft-fe - Install external x11 remote frontend
media-plugins/vdr-graphtft:theme_avp - graphTFT Alien vs. Predato theme
media-plugins/vdr-graphtft:theme_deepblue - graphTFT default theme
media-plugins/vdr-graphtft:theme_deeppurple - graphTFT Deep Purple theme
media-plugins/vdr-graphtft:theme_poetter - graphTFT Poetter theme
media-plugins/vdr-graphtft:touchscreen - Enable Touchscreen support
media-plugins/vdr-music:graphtft - Enable support for media-plugins/vdr-graphtft
media-plugins/vdr-pvr350:yaepg - Enables full support for the output format of vdr-yaepg
media-plugins/vdr-streamdev:client - Compile the VDR plugin vdr-streamdev-client that acts like a dvb-budget card
media-plugins/vdr-streamdev:server - Compile the VDR plugin vdr-streamdev-server that allows remote systems to access the DVB cards used for the local VDR
media-plugins/vdr-text2skin:contrib - Install user contributed scripts
media-plugins/vdr-vdrmanager:stream - Add support for streaming Video to Android client
media-plugins/vdr-weatherng:dxr3 - enables lower osd color depth for dxr3 cards
media-plugins/vdr-xine:yaepg - Enables support for the plugin vdr-yaepg (showing scaled video besides OSD)
media-plugins/vdr-xineliboutput:bluray - Enable BluRay metadata support through media-libs/libbluray
media-plugins/vdr-xineliboutput:cec - Enable CEC support through dev-libs/libcec
media-plugins/vdr-xineliboutput:libextractor - Use media-libs/libextractor to gather files' metadata in media-player
media-plugins/vdr-xineliboutput:vdr - Compile the vdr output plugin to use local or remote xine as output
media-plugins/vdr-xineliboutput:xine - Compile the xine input plugin for displaying vdr video and OSD
media-radio/ax25-tools:X - Enable some X based configuration tools.
media-radio/fldigi:hamlib - Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio in use
media-radio/tucnak2:ftdi - Enable support for FTDI USB chips
media-radio/tucnak2:hamlib - Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio
media-radio/unixcw:ncurses - Enables building the curses based morse code tutor program 'cwcp'.
media-radio/xastir:festival - Enable text to speech synthesizer
media-radio/xastir:gdal - Support for some further map formats
media-radio/xastir:geotiff - Install geotiff support. Allows using USGS DRG topo maps or other types of geotiff mapes/images
media-sound/abcde:id3tag - Support ID3, ID3v2 tagging of audio files
media-sound/abcde:mac - Enable support for Monkey's Audio files
media-sound/abcde:normalize - Add support for normalizing audio file volume levels
media-sound/abcde:opus - Support opus encoding using opusenc
media-sound/abcde:replaygain - Support for Replay Gain metadata, for relative volume adjustment
media-sound/abcm2ps:pango - Use the pango library to render fonts with non-latin characters
media-sound/alsa-utils:bat - install basic audio tester (BAT) util
media-sound/alsa-utils:libsamplerate - install utils that use libsamplerate (e.g. alsaloop)
media-sound/alsa-utils:ncurses - install utils that use ncurses (e.g. alsamixer)
media-sound/alsaplayer:id3tag - Enables ID3 tagging with id3tag library
media-sound/amarok:embedded - Use libmysqld, MySQL embedded server library. Try disabling this if you encounter -PIC related in amarok, it will make amarok rely only on standalone MySQL server.
media-sound/amarok:lastfm - Enable Last.fm streaming services support through media-libs/liblastfm
media-sound/amarok:mp3tunes - Enable mp3tunes integration
media-sound/amarok:mtp - Enable support for libMTP (Plays4Sure) devices access through libmtp
media-sound/amarok:ofa - Use media-libs/libofa to compute MusicDNS acoustic fingerprints (used by MusicBrainz)
media-sound/amarok:utils - Build the utils - old media-sound/amarok-utils
media-sound/amsynth:dssi - Enable support for DSSI Soft Synth Interface
media-sound/aqualung:ifp - Enable support for iRiver iFP portable audio players
media-sound/aqualung:lua - Enable support for programmable title formatting with dev-lang/lua
media-sound/aqualung:mac - Enable support for decoding Monkey's Audio files
media-sound/aqualung:podcast - Enable podcast support
media-sound/aqualung:systray - Enable system tray support
media-sound/ardour:lv2 - Add support for Ladspa V2
media-sound/ario:audioscrobbler - Enable song tracking via last.fm
media-sound/ario:idle - Enable experimental support for MPD's idle command to reduce bandwidth and cpu usage, requires MPD 0.14
media-sound/asunder:mac - Support for creation of Monkey's Audio files (APE)
media-sound/asunder:opus - Support for creation of Opus files
media-sound/audacious:chardet - Try to handle non-UTF8 chinese/japanese/korean ID3 tags
media-sound/audacious:gtk3 - Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
media-sound/audacity:id3tag - Enables ID3 tagging with id3tag library
media-sound/audacity:libsamplerate - Uses media-libs/libsamplerate as audio resampling library: Higher quality than the included resampler but lower quality and much slower than libsoxr.
media-sound/audacity:libsoxr - Uses media-libs/soxr as audio resampling library: Higher quality and much faster than both the included resampler and libsamplerate.
media-sound/audacity:lv2 - Add support for Ladspa V2
media-sound/audacity:midi - Enables MIDI support
media-sound/audacity:portmixer - Enable the internal portmixer feature
media-sound/audacity:sbsms - Enables sbsms library support for slower, more accurate pitch and tempo changing
media-sound/audacity:soundtouch - Enables soundtouch library support for pitch and tempo changing
media-sound/audacity:twolame - Enables twolame support (MPEG Audio Layer 2 encoder)
media-sound/audacity:vamp - Enables vamp plugins support (Audio analysing plugins)
media-sound/audacity:vst - Enable VST plugin support
media-sound/beets:badfiles - Validate MP3 & FLAC files.
media-sound/beets:bpd - Enable support for media-sound/mpd server emulation
media-sound/beets:chroma - Enable support for acoustic fingerprinting plugin using media-libs/chromaprint
media-sound/beets:convert - Enable support for the convert plugin which makes it possible to transcode files
media-sound/beets:discogs - Enable support for the discogs API plugin
media-sound/beets:lastgenre - Enable support for importing music genres from last.fm tags
media-sound/beets:lastimport - Enable support for importing your last.fm playcounts
media-sound/beets:mpdstats - Enable support for collecting statistic about listening habits from media-sound/mpd
media-sound/beets:opus - Enable opus support in gstreamer-based replaygain
media-sound/beets:replaygain - Enable support for Replay Gain metadata calculation during import
media-sound/beets:thumbnails - Generate thumbnails for albums
media-sound/beets:web - Enable embedded webserver support through dev-python/flask
media-sound/bluez-alsa:hcitop - Enable top-like monitoring tool for HCI
media-sound/cantata:http-server - Enable internal HTTP server to play non-MPD files
media-sound/cantata:replaygain - Enable ReplayGain support, for relative volume adjustments
media-sound/clementine:amazoncloud - Enable Amazon cloud drive support
media-sound/clementine:box - Enable filesharing via Box.com
media-sound/clementine:dropbox - Enable Dropbox support
media-sound/clementine:googledrive - Enable Google Drive support
media-sound/clementine:lastfm - Use liblastfm for fetching song info, scrobbling and radio streams
media-sound/clementine:moodbar - Enable moodbar support
media-sound/clementine:projectm - Build with ProjectM visualization
media-sound/clementine:seafile - Enable support for seafile: a file sync service
media-sound/clementine:skydrive - Enable Skydrive support
media-sound/clementine:udisks_legacy - Enable storage management support via legacy sys-fs/udisks:0
media-sound/clementine:vkontakte - Enable vk.com support
media-sound/clementine:wiimote - Enable support for Wii remote
media-sound/cmus:cdio - use libcdio for CD support
media-sound/cmus:cue - enable CUE sheet parsing
media-sound/cmus:discid - enable reading the ID of the inserted CD
media-sound/cmus:opus - enable support for media-libs/opusfile
media-sound/cmus:pidgin - install support script for net-im/pidgin
media-sound/cmus:tremor - use libivorbis from media-libs/tremor instead of media-libs/libvorbis
media-sound/csound:beats - Build the beats score frontend
media-sound/csound:chua - Build the chua opcodes
media-sound/csound:csoundac - Build the CsoundAC extension module
media-sound/csound:double-precision - Use double-precision floating point for audio samples
media-sound/csound:dssi - Build the DSSI opcodes
media-sound/csound:fluidsynth - Build the fluidsynth opcodes
media-sound/csound:image - Build the image opcodes
media-sound/csound:keyboard - Build Virtual MIDI keyboard
media-sound/csound:linear - Build the linear algebra Opcodes
media-sound/csound:luajit - Use the lua just-in-time compiler dev-lang/luajit instead of dev-lang/lua
media-sound/csound:portmidi - Build the PortMIDI I/O module
media-sound/csound:samples - Install the HRTF datafiles for use with hrtfmove, hrtfmove2, hrtfstat, hrtfearly, and hrtfreverb
media-sound/csound:score - Build the alternative score parser
media-sound/csound:stk - Build the stk opcodes
media-sound/csound:tcl - Build the tcl interface and clients
media-sound/csound:utils - Build stand-alone executables for utilities that can also be used via `csound -U`
media-sound/csound:websocket - Build the websocket opcode
media-sound/darkice:aacplus - AAC+ encoding via media-libs/libaacplus
media-sound/darkice:opus - Enable Opus audio codec support
media-sound/darkice:twolame - Build with twolame support
media-sound/deadbeef:aac - Advanced Audio Coding (AAC) plugin
media-sound/deadbeef:adplug - Adplug plugin
media-sound/deadbeef:alac - Apple Lossless Audio Codec (ALAC) plugin
media-sound/deadbeef:cdda - Compact Disc Digital Audio (CDDA) plugin
media-sound/deadbeef:converter - Support for converting media files
media-sound/deadbeef:cover - Album artwork plugin
media-sound/deadbeef:cover-imlib2 - Album artwork (with support for imlib2) plugin
media-sound/deadbeef:cover-network - Plugin for downloading album artwork from internet
media-sound/deadbeef:curl - cURL plugin
media-sound/deadbeef:dts - Digital Theater System (DTS) plugin
media-sound/deadbeef:dumb - Tracker music (MOD, S3M, XM, IT, STM, 669, PTM, PSM, MTM, DSM, ASYLUM AMF, UMX, J2B) plugin
media-sound/deadbeef:equalizer - Equalizer plugin
media-sound/deadbeef:ffmpeg - FFmpeg plugin
media-sound/deadbeef:flac - Free Lossless Audio Codec (FLAC) plugin
media-sound/deadbeef:gme - Game Music Emu (NSF, AY and other formats) plugin
media-sound/deadbeef:gtk2 - GTK2 based user interface
media-sound/deadbeef:gtk3 - GTK3 based user interface
media-sound/deadbeef:hotkeys - Hotkeys support plugin
media-sound/deadbeef:lastfm - Last.fm scrobbling plugin
media-sound/deadbeef:libav - Libav plugin
media-sound/deadbeef:libnotify - Notification daemon support plugin
media-sound/deadbeef:libsamplerate - Sample rate conversion plugin
media-sound/deadbeef:m3u - m3u playlist plugin
media-sound/deadbeef:mac - Monkey's Audio plugin
media-sound/deadbeef:mad - MPEG-1/2/2.5 Layer 3 (MP3) support through mad/libmad
media-sound/deadbeef:midi - midi support (via timidity) plugin
media-sound/deadbeef:mms - Microsoft Media Server (MMS) plugin
media-sound/deadbeef:mono2stereo - mono2stereo plugin
media-sound/deadbeef:mp3 - MPEG-1/2/2.5 Layer 3 (MP3) support plugin. It is a virtual use for mad/libmad or mpg123/libmpg123 since deadbeef 0.6.3
media-sound/deadbeef:mpg123 - MPEG-1/2/2.5 Layer 3 (MP3) support through mpg123/libmpg123
media-sound/deadbeef:nls - Native Language Support (NLS)
media-sound/deadbeef:nullout - NULL output plugin
media-sound/deadbeef:oss - Open Sound System (OSS) output plugin
media-sound/deadbeef:playlist-browser - Playlist browser user interface plugin
media-sound/deadbeef:psf - AOSDK-based PSF(QSF,SSF,DSF) plugin
media-sound/deadbeef:pulseaudio - PulseAudio output plugin
media-sound/deadbeef:sc68 - Atari ST and Amiga music plugin
media-sound/deadbeef:shell-exec - Support for running shell commands
media-sound/deadbeef:shn - Shorten (SHN) plugin
media-sound/deadbeef:sid - Commodore64 SID music player plugin
media-sound/deadbeef:sndfile - PCM wave support (via libsndfile) plugin
media-sound/deadbeef:tta - True Audio TTA plugin
media-sound/deadbeef:unity - Gnome Unity support
media-sound/deadbeef:vorbis - Ogg Vorbis plugin
media-sound/deadbeef:vtx - Libayemy VTX ZX-Spectrum music player plugin
media-sound/deadbeef:wavpack - WavPack plugin
media-sound/deadbeef:wma - Windows media audio plugin
media-sound/deadbeef:zip - vfs_zip plugin
media-sound/denemo:fluidsynth - Enable Fluidsynth MIDI software synthesis
media-sound/denemo:portmidi - Enable support for the portmidi backend
media-sound/dir2ogg:mac - Add support for decoding Monkey's Audio files
media-sound/dir2ogg:wma - Add support for wma files through mplayer
media-sound/drumstick:fluidsynth - Enable support for media-sound/fluidsynth
media-sound/easytag:opus - Enable support for media-libs/opus and media-libs/opusfile (opus audio codec)
media-sound/ecasound:lv2 - Add support for Ladspa V2
media-sound/ecasound:oil - Use dev-libs/liboil for inner loop optimizations
media-sound/fapg:xspf - Enable support for saving XSPF playlists.
media-sound/forked-daapd:itunes - Enable support for iTunes library XML
media-sound/forked-daapd:lastfm - Enable LastFM scrobbling support
media-sound/forked-daapd:mpd - Enable streaming to mpd
media-sound/frescobaldi:portmidi - Enable media-libs/portmidi support
media-sound/gejengel:audioscrobbler - Enable track submission on last.fm
media-sound/gimmix:cover - Enable cover art fetching
media-sound/gimmix:lyrics - Enable lyric fetching
media-sound/gmpc:unique - Enable single instance support using dev-libs/libunique
media-sound/gmpc:xspf - Enable support for reading and saving XSPF playlists
media-sound/gmusicbrowser:extras - Install some extra deps for plugins (ex. Titlebar)
media-sound/gmusicbrowser:gstreamer-0 - Enable audio support via legacy gstreamer:0.10
media-sound/gogglesmm:opus - Enable support for opus codec
media-sound/google-musicmanager:log - Enables advanced logging through dev-libs/log4cxx
media-sound/herrie:http - Enable http streaming
media-sound/herrie:xspf - Enable support for reading and saving XSPF playlists
media-sound/hydrogen:archive - Use libarchive instead of libtar
media-sound/jack-audio-connection-kit:coreaudio - Build the CoreAudio driver on Mac OS X systems
media-sound/jack-audio-connection-kit:cpudetection - Enables runtime cpudetection
media-sound/jack-audio-connection-kit:pam - Add basic realime configuration via sys-auth/realtime-base
media-sound/jack2:celt - Support CELT low delay audio codec (media-libs/celt)
media-sound/jack2:opus - Support media-libs/opus
media-sound/jack2:pam - Add basic realtime configuration via sys-auth/realtime-base
media-sound/jalv:gtk2 - Adds support for GTK+2 in addition to GTK+3 controlled by the gtk useflag.
media-sound/jalv:gtkmm - Adds support for dev-cpp/gtkmm: C++ interface for GTK+2
media-sound/kid3:acoustid - Enable support for acoustic fingerprinting plugin using (media-libs/chromaprint)
media-sound/kid3:phonon - Enable sound support via media-libs/phonon or dev-qt/qtphonon
media-sound/klick:rubberband - Enable rubberband support
media-sound/lame:frontend - Build and install the 'lame' executable frontend to lame libraries.
media-sound/lame:mp3rtp - Build the mp3-to-RTP streaming utility. **UNSUPPORTED**
media-sound/lilypond:guile2 - Enable experimental support for Guile 2
media-sound/linuxsampler:lv2 - Add support for Ladspa V2
media-sound/lmms:fluidsynth - Enables Fluidsynth MIDI software synthesis plugin.
media-sound/lmms:libgig - Enables GIG player plugin.
media-sound/lmms:soundio - Enalbes libsoundio support.
media-sound/lmms:stk - Enables STK Mallet plugin.
media-sound/lmms:vst - Enables the VeSTige plugin to run VST plugins through Wine.
media-sound/lyvi:mpris - Enable MPRIS support
media-sound/mangler:espeak - Text to speech engine
media-sound/mangler:g15 - Logitech g15 lcd support
media-sound/mangler:opus - Codec specialized for speech over the internet
media-sound/mixxx:hid - Enable HID controller support
media-sound/mixxx:shout - Enable broadcasting support via media-libs/libshout
media-sound/mixxx:vamp - Enable vamp analyzing plugins support
media-sound/moc:cache - Enable tags caching support
media-sound/moc:magic - Use libmagic to determine mimetypes
media-sound/moc:sid - Build with SID (Commodore 64 Audio) support
media-sound/moc:tremor - Build vorbis support using an integer implementation of the vorbis library (media-libs/tremor)
media-sound/mp3blaster:sid - Build with SID (Commodore 64 Audio) support
media-sound/mp3splt-gtk:audacious - Include media-sound/audacious support
media-sound/mpd:adplug - Enable the AdPlug decoder plugin
media-sound/mpd:cdio - Use libcdio for ISO9660 parsing support
media-sound/mpd:curl - Support for web stream listening
media-sound/mpd:eventfd - Use the eventfd function in MPD's event loop
media-sound/mpd:faad - Use external faad library for AAC decoding
media-sound/mpd:fifo - Support writing audio to a FIFO
media-sound/mpd:fluidsynth - Enables Fluidsynth MIDI software synthesis (discouraged)
media-sound/mpd:glib - Enable GLib usage
media-sound/mpd:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-sound/mpd:id3tag - Support for ID3 tags
media-sound/mpd:inotify - Use the Linux kernel inotify subsystem to notice changes to mpd music library
media-sound/mpd:lame - Support for MP3 streaming via Icecast2
media-sound/mpd:libmpdclient - Enable support for remote mpd databases
media-sound/mpd:libsoxr - Enable the libsoxr resampler
media-sound/mpd:mpg123 - Enable support for mp3 decoding over media-sound/mpg123
media-sound/mpd:network - Enables network streaming support
media-sound/mpd:nfs - Enable support for the Network File System
media-sound/mpd:opus - Enable Opus codec support
media-sound/mpd:pipe - Support writing audio to a pipe
media-sound/mpd:recorder - Enables output plugin for recording radio streams
media-sound/mpd:sid - Build with SID (Commodore 64 Audio) support
media-sound/mpd:signalfd - Use the signalfd function in MPD's event loop
media-sound/mpd:soundcloud - Build plugin to access soundcloud
media-sound/mpd:systemd - Enable support for systemd socket activation
media-sound/mpd:twolame - Support twolame MPEG-2 encoding
media-sound/mpd:wildmidi - Enable MIDI support via wildmidi
media-sound/mpd:zip - Support for ZIP files
media-sound/mpfc:wav - Enable wav audio codec support
media-sound/mpg123:int-quality - Use rounding instead of fast truncation for integer output, where possible
media-sound/mumble:g15 - Enable support for the Logitech G15 LCD (and compatible devices).
media-sound/mumble:speech - Enable text-to-speech support in Mumble.
media-sound/murmur:ice - Use dev-libs/Ice to enable remote control capabilities.
media-sound/ncmpc:artist-screen - Enable artist screen
media-sound/ncmpc:chat-screen - Enable the chat screen
media-sound/ncmpc:colors - Enable color support
media-sound/ncmpc:help-screen - Enable the help screen
media-sound/ncmpc:key-screen - Enable key editor screen
media-sound/ncmpc:lyrics-screen - Enable lyrics screen
media-sound/ncmpc:mouse - Enable curses getmouse support
media-sound/ncmpc:search-screen - Enable search screen
media-sound/ncmpc:song-screen - Enable song viewer screen
media-sound/ncmpcpp:clock - Enable clock screen
media-sound/ncmpcpp:outputs - Enable outputs screen
media-sound/ncmpcpp:visualizer - Enable visualizer screen with sound wave/frequency spectrum modes
media-sound/patchage:jack-dbus - Use Jack via D-Bus instead of libjack
media-sound/patchage:session - Include experimental Jack session management (save/restore) support
media-sound/pianobooster:fluidsynth - Enable Fluidsynth MIDI software synthesis
media-sound/picard:acoustid - Use media-libs/chromaprint for acoustic fingerprinting
media-sound/pithos:appindicator - Enable usage of appindicator to export menu options in to unity
media-sound/pithos:keybinder - Use keybinder to enable global key bindings
media-sound/pms:regex - Enable regular expression searches
media-sound/podcatcher:bittorrent - Enable support for bittorrent downloads
media-sound/potamus:opus - Adds support for the Opus codec.
media-sound/pragha:glyr - Enable music metadata searchengine support using media-libs/glyr
media-sound/pragha:grilo - Play songs on DLNA servers using media-libs/grilo
media-sound/pragha:keybinder - Enable shortcut support using dev-libs/keybinder
media-sound/pragha:lastfm - Enable last.fm support using media-libs/libclastfm
media-sound/pragha:peas - Enable various plugins that will pull in dev-libs/libpeas as a dependency
media-sound/pragha:playlist - Enable enhanced playlist support using dev-libs/totem-pl-parser
media-sound/pragha:rygel - Share music on DLNA using net-misc/rygel
media-sound/pragha:soup - Search metadata on AcoustID and radios on TuneIn using net-libs/libsoup
media-sound/puddletag:acoustid - Use media-libs/chromaprint for acoustic fingerprinting
media-sound/puddletag:cover - Enables editing of FLAC cover art
media-sound/puddletag:musicbrainz - Enables support for musicbrainz, needs dev-python/python-musicbrainz
media-sound/puddletag:quodlibet - Enables support for editing media-sound/quodlibet databases
media-sound/pulseaudio:X - Build the X11 publish module to export PulseAudio information through X11 protocol for clients to make use. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
media-sound/pulseaudio:alsa-plugin - Request installing media-plugins/alsa-plugins with PulseAudio plugin enabled. This ensures that clients supporting ALSA only will use PulseAudio.
media-sound/pulseaudio:asyncns - Use libasyncns for asynchronous name resolution.
media-sound/pulseaudio:doc - Build the doxygen-described API documentation.
media-sound/pulseaudio:equalizer - Enable the equalizer module (requires sci-libs/fftw).
media-sound/pulseaudio:gdbm - Use sys-libs/gdbm to store PulseAudio databases. Recommended for desktop usage. This flag causes the whole package to be licensed under GPL-2 or later.
media-sound/pulseaudio:glib - Add support to dev-libs/glib-based mainloop for the libpulse client library, to allow using libpulse on glib-based programs.
media-sound/pulseaudio:gnome - Use GConf to store user preferences on streams and so on. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
media-sound/pulseaudio:native-headset - Build with native HSP backend for bluez 5.
media-sound/pulseaudio:ofono-headset - Build with oFono HFP backend for bluez 5, requires net-misc/ofono.
media-sound/pulseaudio:oss - Enable OSS sink/source (output/input). Deprecated, upstream does not support this on systems where other sink/source systems are available (i.e.: Linux). The padsp wrapper is now always build if the system supports OSS at all.
media-sound/pulseaudio:realtime - Makes PulseAudio use RealtimeKit (sys-auth/rtkit) to get real-time priority while running.
media-sound/pulseaudio:ssl - Use dev-libs/openssl to provide support for RAOP (AirPort) streaming.
media-sound/pulseaudio:system-wide - Allow preparation and installation of the system-wide init script for PulseAudio. Since this support is only supported for embedded situations, do not enable without reading the upstream instructions at http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/ .
media-sound/pulseaudio:systemd - Build with sys-apps/systemd support to replace standalone ConsoleKit.
media-sound/pulseaudio:webrtc-aec - Uses the webrtc.org AudioProcessing library for enhancing VoIP calls greatly in applications that support it by performing acoustic echo cancellation, analog gain control, noise suppression and other processing.
media-sound/pulseaudio:xen - Builds a special paravirtualized module for running in a Xen guest.
media-sound/qmidiarp:lv2 - Enables Ladspa V2 plugins.
media-sound/qmmp:analyzer - Enable visual analyzer
media-sound/qmmp:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-sound/qmmp:cover - Enable album cover support
media-sound/qmmp:crossfade - Enable crossfade effect when switching tracks
media-sound/qmmp:cue - enable CUE sheet parsing
media-sound/qmmp:enca - Detects the character encoding automatically
media-sound/qmmp:game - Enable Game music support
media-sound/qmmp:kde - Use kde4 notifier system
media-sound/qmmp:lyrics - Fetch track lyrics from the web
media-sound/qmmp:midi - Enable midi support using wildmidi library
media-sound/qmmp:mpris - Enable MPRIS support
media-sound/qmmp:notifier - Enable qmmps' notifier system
media-sound/qmmp:opus - Enable the opus plugin
media-sound/qmmp:projectm - Enable projectm music visualization plugin
media-sound/qmmp:qsui - Enable QMMP simple UI
media-sound/qmmp:scrobbler - Enable audioscrobbler/last.fm support
media-sound/qmmp:soxr - Use the SoX resampling library
media-sound/qmmp:stereo - Enable stereo effect
media-sound/qmmp:tray - Build tray icon
media-sound/qsampler:libgig - Enable libgig support for loading Gigasampler files and DLS (Downloadable Sounds) Level 1/2 files
media-sound/qtractor:dssi - Enable support for DSSI Soft Synth Interface
media-sound/qtractor:rubberband - Enable support for in-place audio clip pitch-shifting through the rubberband library
media-sound/qtscrobbler:cli - Build commandline client
media-sound/quark:gnome - Provides tray-icon and enables gconf support
media-sound/renoise:icons - Install icons and desktop menu entries
media-sound/renoise-demo:icons - Install icons and desktop menu entries
media-sound/rezound:16bittmp - Use 16bit temporary files (default 32bit float), useful for slower computers
media-sound/rezound:soundtouch - compile with support for soundtouch
media-sound/rhythmbox:daap - Build the local network music sharing plugin which uses the DAAP protocol using net-libs/libdmapsharing
media-sound/rhythmbox:visualizer - Enable support for visualizations using media-plugins/gst-plugins-libvisual
media-sound/rhythmbox:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
media-sound/rubyripper:cdrdao - Add support for advanced toc scanning using app-cdr/cdrdao
media-sound/rubyripper:cli - Build command line interface rubyripper
media-sound/rubyripper:normalize - Add support for normalizing audio file volume levels
media-sound/rubyripper:wav - Add support for wavegain
media-sound/shntool:alac - Add support for Apple Lossless Audio Codec files
media-sound/shntool:mac - Add support for Monkey's Audio files
media-sound/snd:s7 - Enable the s7 extension language (a version of Scheme)
media-sound/sonata:lyrics - Support for lyrics fetching
media-sound/sonata:trayicon - Enable support for trayicon
media-sound/sonic-visualiser:id3tag - Enables ID3 tagging with id3tag library
media-sound/soundconverter:opus - Enable Opus audio codec support
media-sound/sox:amr - Enables Adaptive Multi-Rate Audio support
media-sound/sox:id3tag - Enables ID3 tagging with id3tag library
media-sound/sox:opus - Enables reading Ogg Opus files.
media-sound/sox:twolame - Enables twolame support (MPEG Audio Layer 2 encoder)
media-sound/split2flac:enca - Try to guess the charset using enca
media-sound/split2flac:flake - Add support for Flake, alternative FLAC encoder
media-sound/split2flac:mac - Add support for Monkey's Audio files
media-sound/split2flac:replaygain - Support for Replay Gain metadata, for relative volume adjustment
media-sound/spotify:pax_kernel - Triggers a paxmarking of the main Spotify binary
media-sound/squeezelite:aac - Supports streaming AAC from the server, utilising media-libs/faad2
media-sound/squeezelite:flac - Supports streaming FLAC from the server, utilising media-libs/flac
media-sound/squeezelite:mp3 - Supports streaming MP3 from the server, utilising media-libs/libmad
media-sound/squeezelite:vorbis - Supports streaming Ogg/Vorbis from the server, utilising media-libs/libvorbis
media-sound/supercollider:emacs - Enable the SCEL user interface
media-sound/supercollider:gedit - Enable the SCED user interface
media-sound/supercollider:gpl3 - Build GPL-3 licensed code (recommended)
media-sound/supercollider:server - Build with internal server
media-sound/supercollider:vim - Enable the SCVIM user interface
media-sound/supercollider:wiimote - Build sclang with Wii Remote support
media-sound/teamspeak-server-bin:tsdns - Make use of TeamSpeak DNS.
media-sound/tomahawk:hatchet - Enable support for the synchronisation through Hatchet
media-sound/tomahawk:telepathy - Enable support for the real-time communication framework telepathy
media-sound/traverso:lv2 - Add support for Ladspa V2
media-sound/tuxguitar:fluidsynth - Enables Fluidsynth MIDI software synthesis (with external sound fonts). JSA must be disabled in the plug-ins menu to use this.
media-sound/tuxguitar:lilypond - Exports the score in a lilypond compatible format.
media-sound/tuxguitar:pdf - Exports the score as a PDF file using dev-java/itext.
media-sound/tuxguitar:tray - Adds an icon to the tray that controls midi playback.
media-sound/umurmur:polarssl - Use net-libs/polarssl instead of dev-libs/openssl
media-sound/umurmur:shm - Enable shared memory support
media-sound/vimpc:boost - Use boost instead of C++11 libraries
media-sound/vorbis-tools:kate - Adds support for Ogg Kate subtitles via libkate.
media-sound/vorbis-tools:ogg123 - Build ogg123 player, needs libao and curl
media-sound/wildmidi:player - Install the wildmidi player
media-sound/xmms2:airplay - Support for airplay format
media-sound/xmms2:asf - Support for Monkey's Audio (APE) format with help of bundled libasf
media-sound/xmms2:gvfs - Transport for glibs virtual filesystem
media-sound/xmms2:ices - Icecast source output plugin
media-sound/xmms2:mac - Support for Monkey's Audio (APE) format with help of media-sound/mac
media-sound/xmms2:mlib-update - Enable building of xmms2-mlib-updater client
media-sound/xmms2:ofa - Support for Open Fingerprint Architecture (OFA)
media-sound/xmms2:phonehome - This client sends anonymous usage-statistics to the xmms2
media-sound/xmms2:server - Build xmms2 player daemon (otherwise only clients are built)
media-sound/xmms2:sid - Support for C64 SID
media-sound/xmms2:valgrind - Run unit tests under valgrind.
media-sound/xmms2:vocoder - Phase vocoder effect plugin
media-sound/xmms2:xml - Enable support for various XML based playlists and sources: RSS, XSPF
media-sound/xnoise:lastfm - Enable support for lastfm cover art fetching and scrobbling
media-sound/xnoise:lyrics - Enable support for lyrics fetching
media-sound/xwax:alsa - Adds support for ALSA audio input/output.
media-sound/xwax:cdda - Sets runtime dependencies to support decoding audio from a compact disc.
media-sound/xwax:fallback - Sets runtime dependencies to support decoding "other" audio files.
media-sound/xwax:jack - Adds support for audio input/output via the JACK Audio Connection Kit.
media-sound/xwax:mp3 - Sets runtime dependencies to support decoding MP3 audio.
media-sound/xwax:oss - Adds support for OSS (open sound system) audio input/output.
media-sound/yoshimi:lv2 - Add support for Ladspa V2
media-tv/gentoo-vdr-scripts:nvram - Add support for using nvram-wakeup to set wakeup time in bios
media-tv/kodi:airplay - enable AirPlay support
media-tv/kodi:bluray - Enable playback of Blu-ray filesystems
media-tv/kodi:cec - Enable support for HDMI-CEC devices via libcec
media-tv/kodi:dvd - Enable optical (CD/DVD drive) support
media-tv/kodi:gles - Enable support for GLES
media-tv/kodi:libusb - Use virtual/libusb for usb device hotplug support. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev.
media-tv/kodi:lirc - Enable support for controlling Totem with a remote control using app-misc/lirc
media-tv/kodi:nfs - Enable NFS client support
media-tv/kodi:nonfree - Enable non-free components
media-tv/kodi:sftp - Support browsing files over SFTP
media-tv/kodi:system-ffmpeg - Use system ffmpeg instead of the bundled one
media-tv/kodi:udev - Use sys-fs/udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness.
media-tv/kodi:webserver - Enable internal webserver
media-tv/kodi:xslt - Enable XSLT support using dev-libs/libxslt
media-tv/linuxtv-dvb-apps:alevt - Build videotext decoder
media-tv/me-tv:http - Installation of Web-frontend
media-tv/mythtv:alsa - Allows MythTV to directly output sound to ALSA devices, this is needed if you are using ALSA dmix or SPDIF. Note, you will have to physically type your device into the MythTV configuration since it will only give you /dev/dsp devices in the drop down.
media-tv/mythtv:altivec - Builds ffmpeg's codec libraries with altivec support.
media-tv/mythtv:autostart - Uses a custom autostart configuration gleaned from experience with MythTV since its early versions and discussed with other MythTV maintainers and users. Does not rely on KDE being installed like most methods do.
media-tv/mythtv:bluray - Pulls in libbluray for BluRay support.
media-tv/mythtv:cec - Allows you to control CEC enabled TVs via HDMI. Currently requires a USB based CEC -> HDMI injector between your TV and video card since no graphics drivers support CEC natively.
media-tv/mythtv:crystalhd - Allows you to utilize a Broadcom CrystalHD hardware based video decoder to improve the performance of video decode.
media-tv/mythtv:debug - Instructs Qt to use the 'debug' target instead of 'release' target. If your MythTV is crashing or you need a backtrace, you need to compile it with this option otherwise the debugging data is useless.
media-tv/mythtv:dvb - Enables support for Linux DVB cards. These include all cards that work with digital signals such as ATSC, DVB-T, DVB-C, and DVB-S, QAM-64, and QAM-256.
media-tv/mythtv:egl - Support EGL video output.
media-tv/mythtv:fftw - Support visualizations via sci-libs/fftw
media-tv/mythtv:hls - HTTP Live Streaming support
media-tv/mythtv:ieee1394 - Allows MythTV to communicate and use Firewire enabled Cable boxes. These are typically found in the United States, where such support is required by law. This will also install Firewire test programs and external channel changers if the internal changer does not work.
media-tv/mythtv:jack - Allows MythTV to use JACK as your sound output device. You will have to manually configure the path to your JACK settings.
media-tv/mythtv:lcd - Tells MythTV that you have an instance of app-misc/lcdproc configured on your machine and it should output information such as current time, show name, episode name, etc to that LCD.
media-tv/mythtv:lirc - Adds LIRC support directly to MythTV allowing for built in control via a LIRC device.
media-tv/mythtv:mythlogserver - Enable support for syslog and file logging. Not used with systemd.
media-tv/mythtv:perl - Builds the perl bindings for MythTV. Allows you to write scripts in Perl to control your MythTV setup or communicate with it.
media-tv/mythtv:wrapper - Use Ubuntu mythtfrontend wrapper.
media-tv/mythtv:xmltv - Pulls in the media-tv/xmltv TV listing grabbers for users not using Schedules Direct.
media-tv/tvbrowser:themes - Install extra theme packs
media-tv/tvheadend:capmt - Enable support for capmt (dvbapi) protocol
media-tv/tvheadend:constcw - Enable support for the constcw protocol
media-tv/tvheadend:cwc - Enable support for the cwc (newcamd) protocol
media-tv/tvheadend:dvbscan - Use media-tv/linuxtv-dvb-apps
media-tv/tvheadend:hdhomerun - Enable support for the HDHomeRun device
media-tv/tvheadend:imagecache - Enable support for image caching
media-tv/tvheadend:iptv - Enable support for Internet Protocol TV
media-tv/tvheadend:satip - Enable support for IP-based Satellite TV
media-tv/tvheadend:timeshift - Enable TimeShift support
media-tv/tvheadend:uriparser - Use dev-libs/uriparser
media-tv/tvheadend:xmltv - Use media-tv/xmltv
media-tv/v4l-dvb-saa716x:firmware - Install firmware
media-tv/xmltv:ar - Argentina tv listing grabber
media-tv/xmltv:ch - Switzerland bluewin tv listing grabber
media-tv/xmltv:ch_search - Grabber for Switzerland
media-tv/xmltv:dk - Denmark tv listing grabber
media-tv/xmltv:dtvla - Latin America digital tv listing grabber
media-tv/xmltv:ee - Estonia tv listing grabber
media-tv/xmltv:es_laguiatv - Spain alternative grabber
media-tv/xmltv:es_miguiatv - Spain alternative grabber
media-tv/xmltv:eu_dotmedia - Grabber for Europe (xmltv.se / dotmedia)
media-tv/xmltv:eu_egon - Grabber for german speaking area (Egon zappt)
media-tv/xmltv:eu_epg - EPG grabber for some European countries.
media-tv/xmltv:fi - Finland tv listing grabber
media-tv/xmltv:fi_sv - Grabber for Finland (Swedish)
media-tv/xmltv:fr - France tv listing grabber
media-tv/xmltv:fr_kazer - France (Kazer) tv listing grabber
media-tv/xmltv:hr - Croatia tv listing grabber
media-tv/xmltv:huro - Hungarian tv listing grabber
media-tv/xmltv:il - Israel tv listing grabber
media-tv/xmltv:in - India tv listing grabber
media-tv/xmltv:is - Iceland tv listing grabber
media-tv/xmltv:it - Italy tv listing grabber
media-tv/xmltv:na_dd - North America tv listing grabber
media-tv/xmltv:na_dtv - North America Direct TV grabber
media-tv/xmltv:na_icons - option for na_dd to download icons
media-tv/xmltv:na_tvmedia - Grabber for North America (TVMedia)
media-tv/xmltv:nl - Netherlands tv listing grabber
media-tv/xmltv:no_gf - Norway Gfeed tv listing grabber
media-tv/xmltv:pt - Portugal tv listing grabber
media-tv/xmltv:pt_meo - Grabber for Portugal (MEO)
media-tv/xmltv:re - Reunion Island (France) tv listing grabber
media-tv/xmltv:sd_json - Grabber for schedulesDirect.org SD-JSON service (many countries)
media-tv/xmltv:se_swedb - Sweden tv listing grabber
media-tv/xmltv:se_tvzon - Sweden (tvzon.se) tv listing grabber
media-tv/xmltv:tr - Turkey (Digiturk) tv listing grabber
media-tv/xmltv:tv_check - enable GUI checking
media-tv/xmltv:tv_combiner - enable grabbers combiner
media-tv/xmltv:tv_pick_cgi - enable CGI support
media-tv/xmltv:uk_atlas - Fast UK and Ireland tv listing grabber
media-tv/xmltv:uk_bleb - Britain tv listing grabber
media-tv/xmltv:uk_rt - Britain alternative tv listing grabber
media-tv/xmltv:uk_tvguide - UK and Ireland tv listing grabber using TV Guide website
media-tv/xmltv:za - South Africa tv listing grabber
media-video/aegisub:uchardet - Enable charset discovery via app-i18n/uchardet
media-video/aravis:X - Build the GTK+-based video viewer for aravis. This requires GStreamer and a few plugins but technically not the GST plugin for aravis.
media-video/aravis:gstreamer - Build the GStreamer plugin for aravis, but not the video viewer.
media-video/chaplin:transcode - Enable DVD ripping and transcoding
media-video/clive:clipboard - Support reading from X clipboard
media-video/clive:pager - Support pager!?
media-video/clive:password - Support password controlled sites
media-video/dcpomatic:alsa - Utilize alsa output of media-libs/rtaudio.
media-video/dcpomatic:jack - Utilize jack output of media-libs/rtaudio.
media-video/dcpomatic:pulseaudio - Utilize pulseaudio output of media-libs/rtaudio.
media-video/dv2sub:kino - install kino plugin
media-video/dvdrip:fping - Enables fping support for cluster rendering
media-video/dvdrip:subtitles - Enables support for subtitle ripping
media-video/ffdiaporama:openclipart - Support openslipart database
media-video/ffdiaporama:texturemate - Install extra backgrounds
media-video/ffmpeg:aacplus - AAC+ encoding via media-libs/libaacplus.
media-video/ffmpeg:amr - Enables Adaptive Multi-Rate Audio support
media-video/ffmpeg:amrenc - Enables Adaptive Multi-Rate Audio encoding support with media-libs/vo-amrwbenc.
media-video/ffmpeg:armv5te - Enables optimizations for armv5te processors.
media-video/ffmpeg:armv6 - Enables optimizations for armv6 processors.
media-video/ffmpeg:armv6t2 - Enables optimizations for armv6t2 processors.
media-video/ffmpeg:armvfp - Enables VFP optimizations for ARM processors.
media-video/ffmpeg:bluray - Enable playback of Blu-ray filesystems
media-video/ffmpeg:bs2b - Enables media-libs/libbs2b based Bauer stereo-to-binaural filter.
media-video/ffmpeg:cdio - Enables audio CD grabbing with dev-libs/libcdio.
media-video/ffmpeg:celt - Adds Xiph CELT audio decoding support via media-libs/celt
media-video/ffmpeg:chromaprint - Enables audio fingerprinting support with media-libs/chromaprint.
media-video/ffmpeg:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)
media-video/ffmpeg:ebur128 - Enables EBU R128 loudness normalization filter via media-libs/libebur128
media-video/ffmpeg:faac - Use external faac library for AAC encoding
media-video/ffmpeg:fdk - Use external fdk-aac library for AAC encoding
media-video/ffmpeg:flite - Adds a text-to-speech filter based on app-accessibility/flite.
media-video/ffmpeg:frei0r - Enable frei0r wrapping in libavfilter
media-video/ffmpeg:fribidi - Enables fribidi support in the drawtext filter.
media-video/ffmpeg:gcrypt - Enables gcrypt support: Needed for rtmp(t)e support if openssl, librtmp or gmp is not used.
media-video/ffmpeg:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-video/ffmpeg:gpl - Build GPL code. Should be enabled unless you require LGPL binaries.
media-video/ffmpeg:hardcoded-tables - Use pre-calculated tables rather than calculating them on the fly.
media-video/ffmpeg:iec61883 - Support for FireWire DV/HDV input device using media-libs/libiec61883.
media-video/ffmpeg:kvazaar - Enables media-libs/kvazaar based HEVC encoder.
media-video/ffmpeg:libilbc - Enables iLBC de/encoding via media-libs/libilbc.
media-video/ffmpeg:librtmp - Enables Real Time Messaging Protocol using librtmp (media-video/rtmpdump) in addition to FFmpeg's native implementation.
media-video/ffmpeg:libsoxr - Enables audio resampling through media-libs/soxr.
media-video/ffmpeg:libv4l - Uses media-libs/libv4l for video4linux instead of direct calls. Adds support for more devices via the userspace library.
media-video/ffmpeg:mipsdspr1 - Enables MIPS DSP ASE R1 optimizations.
media-video/ffmpeg:mipsdspr2 - Enables MIPS DSP ASE R2 optimizations.
media-video/ffmpeg:mipsfpu - Enables floating point MIPS optimizations.
media-video/ffmpeg:mmal - Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi.
media-video/ffmpeg:network - Enables network streaming support
media-video/ffmpeg:nvenc - Adds support for NVIDIA Encoder (NVENC) API for hardware accelerated encoding on NVIDIA cards.
media-video/ffmpeg:openh264 - Enables H.264 encoding suppoprt via media-libs/openh264.
media-video/ffmpeg:openssl - Enables dev-libs/openssl support. Adds support for encrypted network protocols (TLS/HTTPS).
media-video/ffmpeg:opus - Adds (decoding) support for the Opus codec via media-libs/opus.
media-video/ffmpeg:pic - Force shared libraries to be built as PIC (this is slower)
media-video/ffmpeg:postproc - Build and install libpostproc.
media-video/ffmpeg:quvi - Adds support for playing media from Internet services using the quvi project.
media-video/ffmpeg:rubberband - Adds time-stretching and pitch-shifting audio filter based on media-libs/rubberband.
media-video/ffmpeg:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/ffmpeg:snappy - Enable app-arch/snappy support. Required for e.g. Vidvox Hap encoder.
media-video/ffmpeg:sofalizer - Enables Sofalizer filter
media-video/ffmpeg:ssh - Enable SSH/sftp support via net-libs/libssh.
media-video/ffmpeg:twolame - Enables MP2 encoding via media-sound/twolame as an alternative to the internal encoder.
media-video/ffmpeg:vpx - Enables vp8 codec support using libvpx: Decoding vp8 does not require this to be enabled but libvpx can also be used for decoding; encoding vp8 requires this useflag to be enabled though.
media-video/ffmpeg:webp - Enables WebP encoding with media-libs/libwebp.
media-video/ffmpeg:x265 - Enables HEVC encoding with media-libs/x265.
media-video/ffmpeg:zeromq - Enables net-libs/zeromq support with the zmq/azmq filters.
media-video/ffmpeg:zimg - Enables media-libs/zimg based scale filter.
media-video/ffmpeg:zvbi - Enables media-libs/zvbi based teletext decoder.
media-video/ffmpeg2theora:kate - Adds support for Ogg Kate subtitles via libkate.
media-video/gnome-mplayer:dconf - Enable support for gnome-base/dconf
media-video/gnome-mplayer:gda - Enable support for gnome-extra/libgda
media-video/google2srt:html - Install HTML documentation
media-video/h264enc:ogm - Support for OGM container format
media-video/handbrake:fdk - Support for encoding AAC using media-libs/fdk-aac.
media-video/handbrake:gstreamer - Support for the streaming media framework from media-libs/gstreamer.
media-video/handbrake:gtk - Install the GTK UI, ghb.
media-video/handbrake:libav-aac - Support for encoding AAC using media-video/libav's internal encoder.
media-video/handbrake:x265 - Support for encoding h265 using media-libs/x265.
media-video/kino:gpac - Enable GPAC support when exporting to 3GPP format
media-video/kmplayer:npp - Compile the npp backend that plays xembed style browser plugins.
media-video/libav:aac - Use external vo-aacenc library for AAC encoding
media-video/libav:amr - Enable Adaptive Multi-Rate Audio support
media-video/libav:armv5te - Enable optimizations for armv5te processors
media-video/libav:armv6 - Enable optimizations for armv6 processors
media-video/libav:armv6t2 - Enable optimizations for armv6t2 processors
media-video/libav:armvfp - Enable VFP optimizations for ARM processors
media-video/libav:bs2b - Enable media-libs/libbs2b based Bauer stereo-to-binaural audio filter
media-video/libav:cdio - Enable audio CD grabbing with dev-libs/libcdio.
media-video/libav:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs).
media-video/libav:faac - Use external faac library for AAC encoding
media-video/libav:fdk - Use external fdk-aac library for AAC encoding and decoding
media-video/libav:frei0r - Enable frei0r wrapping in libavfilter
media-video/libav:gpl - Build all GPL licensed code. Without this flag set the package is build under LGPL license.
media-video/libav:hardcoded-tables - Use pre-calculated tables rather than calculating them on the fly.
media-video/libav:network - Enable network streaming support.
media-video/libav:nvidia - Enable nvidia video codec hardware acceleration support.
media-video/libav:openssl - Prefer dev-libs/openssl over net-libs/gnutls to provide SSL/TLS support (notice: the resulting binaries are unredistributable).
media-video/libav:opus - Use the external opus library for encoding and decoding.
media-video/libav:pic - Force shared libraries to be built as PIC (this is slower).
media-video/libav:pulseaudio - Enable pulseaudio input support.
media-video/libav:rtmp - Enable Real Time Messaging Protocol using librtmp instead the native implementation.
media-video/libav:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/libav:ssl - Enable SSL/TLS support using dev-libs/openssl or net-libs/gnutls.
media-video/libav:tools - Build and install small tools like aviocat, cws2fws, graph2dot, ismindex, qt-faststart.
media-video/libav:twolame - Enable MP2 encoding via media-sound/twolame as an alternative to the internal encoder
media-video/libav:vis - Adds support for SIMD optimizations for UltraSPARC processors.
media-video/libav:vpx - Enable vp8 encoding support using media-libs/libvpx.
media-video/libav:webp - Enable WebP encoding with media-libs/libwebp.
media-video/libav:x265 - Enable HEVC encoding with media-libs/x265.
media-video/libva-utils:drm - Enables VA/DRM API support.
media-video/lives:libvisual - Enable libvisual support
media-video/minitube:download - Enable support for downloading YouTube videos
media-video/mjpegtools:sdlgfx - Enables y4mhist to display a graphical histogram
media-video/mjpg-streamer:input_control - Plugin giving ability to control camera movement (only specific cameras)
media-video/mjpg-streamer:input_file - Plugin that watches given directory and send it's content
media-video/mjpg-streamer:input_testpicture - Plugin for sending compiled in, test pictures
media-video/mjpg-streamer:input_uvc - Plugin that sends video stream from UVC compatible camera
media-video/mjpg-streamer:output_autofocus - Auto focusing plugin
media-video/mjpg-streamer:output_file - Plugin that saves received content under given location
media-video/mjpg-streamer:output_http - Small HTTP server plugin which sends WWW directory content and streams image content
media-video/mjpg-streamer:output_rtsp - Plugin which provides a mechanism to take snapshots with a trigger from a UDP packet
media-video/mjpg-streamer:output_udp - Plugin receiving content over UDP and storing to a directory
media-video/mjpg-streamer:v4l - Uses media-libs/libv4l function mapping for input_uvc plugin
media-video/mjpg-streamer:www - Installs WWW content
media-video/motion:mmal - Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi.
media-video/motiontrack:multiprocess - Enables multi-process support (SMP/cluster) for motiontrack programs
media-video/mplayer:bl - Blinkenlights video output
media-video/mplayer:bluray - Enable playback of Blu-ray filesystems
media-video/mplayer:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-video/mplayer:cdio - Use libcdio for CD support (instead of cdparanoia)
media-video/mplayer:cpudetection - Enables runtime CPU detection (useful for binpkgs, compatibility on other CPUs)
media-video/mplayer:dvdnav - Use forked libdvdnav, navigate menus in GUIs
media-video/mplayer:enca - Enables support for charset discovery and conversion
media-video/mplayer:faac - Use external faac library for AAC encoding
media-video/mplayer:faad - Use external faad library for AAC decoding
media-video/mplayer:libmpeg2 - Build support for mpeg2 over media-libs/libmpeg2 rather than using ffmpeg.
media-video/mplayer:live - Enables live.com streaming media support
media-video/mplayer:md5sum - Enables md5sum video output
media-video/mplayer:mng - MNG input support
media-video/mplayer:network - Enables network streaming support
media-video/mplayer:nut - Enables support for the NUT container format
media-video/mplayer:osdmenu - Enables support for on-screen display (OSD) menus
media-video/mplayer:pnm - Add PNM video output option, to create PPM/PGM/PGMYUV images
media-video/mplayer:pvr - Enable Video4Linux2 MPEG PVR
media-video/mplayer:radio - Enable V4L2 radio interface and support
media-video/mplayer:rar - Enable Unique RAR File Library
media-video/mplayer:rtc - Enables usage of the linux real time clock. The alternative is software emulation of rtc
media-video/mplayer:rtmp - Enables RTMPDump Streaming Media support
media-video/mplayer:shm - Enable support for shm
media-video/mplayer:tga - Enables Targa video output
media-video/mplayer:toolame - Enable toolame MPEG-2 encoding
media-video/mplayer:tremor - Enable internal support for Vorbis
media-video/mplayer:twolame - Enable twolame MPEG-2 encoding
media-video/mplayer:vcd - Enables VCD support
media-video/mplayer:vidix - Support for vidix video output
media-video/mplayer:xvmc - Enables X-Video Motion Compensation support
media-video/mplayer:yuv4mpeg - Enables yuv4mpeg video output
media-video/mplayer:zoran - Enables ZR360[56]7/ZR36060 video output
media-video/mpv:archive - Enable support for various archive formats via app-arch/libarchive
media-video/mpv:bluray - Enable playback of Blu-ray filesystems
media-video/mpv:cli - Build mpv CLI player
media-video/mpv:cplugins - Enable C plugins support
media-video/mpv:cuda - Enable hardware video decoding via Nvidia CUDA
media-video/mpv:drm - Enable Kernel Mode Setting / Direct Rendering Manager based video output
media-video/mpv:egl - Enable support for various EGL-based video outputs / backends
media-video/mpv:enca - Enable subtitles charset discovery via app-i18n/enca
media-video/mpv:gbm - Enable Graphics Buffer Manager based EGL video output
media-video/mpv:jpeg - Enable support for saving screenshots in JPEG format
media-video/mpv:libass - Enable OSD (On Screen Display) and subtitles support via media-libs/libass
media-video/mpv:libguess - Enable subtitles charset discovery via app-i18n/libguess
media-video/mpv:libmpv - Build mpv shared library
media-video/mpv:lua - Enable Lua scripting, OSC (On Screen Controller) GUI and net-misc/youtube-dl hook-script
media-video/mpv:luajit - Use dev-lang/luajit instead of dev-lang/lua
media-video/mpv:raspberry-pi - Enable support for the Raspberry Pi
media-video/mpv:rubberband - Enable high quality pitch correction via media-libs/rubberband
media-video/mpv:sdl - Enable media-libs/libsdl2 based video and audio outputs (Note: these outputs exist for compatibility reasons only, avoid if possible)
media-video/mpv:tools - Install extra tools: mpv_identify.sh, mpv_idet.sh, and umpv
media-video/mpv:uchardet - Enable subtitles charset discovery via app-i18n/uchardet
media-video/mpv:vf-dlopen - Install additional video filters to be used with -vf dlopen
media-video/noad:libmpeg2 - Support for libmpeg2 library
media-video/nvidia-settings:gtk3 - Additionally build the GTK 3 library
media-video/nvidia_video_sdk:tools - Build and install example tools.
media-video/obs-studio:fdk - Enable libfdk support for AAC encoding.
media-video/obs-studio:imagemagick - Use ImageMagick for image loading instead of FFmpeg.
media-video/ogmrip:ogm - Support for OGM container format
media-video/ogmrip:srt - Support for SRT subtitle format
media-video/orion:mpv - Use the media-video/mpv player (upstream default) instead of the dev-qt/qtmultimedia one
media-video/parole:clutter - Compile in Clutter GTK+ support
media-video/qgifer:imagemagick - Use imagemagick for image operations
media-video/qgifer:opencv3 - Use media-libs/opencv:0/3.0 for video operations instead media-libs/opencv:0/2.4
media-video/rtmpdump:gnutls - Use GnuTLS library instead of the default OpenSSL
media-video/rtmpdump:polarssl - Use PolarSSL library instead of the default OpenSSL
media-video/simplescreenrecorder:asm - Enable x86 assembly optimisation.
media-video/simplescreenrecorder:vpx - Enable VP8 codec support via media-libs/libvpx.
media-video/smplayer:autoshutdown - Enable the option to shutdown your computer after finishing the playlist. This requires dev-qt/qtdbus as dependency.
media-video/smplayer:mpris - Enable support for MPRIS2 (Media Player Remote Interfacing Specification, version 2), a DBus interface for remote control, which requires dev-qt/qtdbus as dependency.
media-video/smplayer:streaming - Support for streaming video sites through net-misc/youtube-dl (MPV only).
media-video/smtube:qt5 - Build using Qt 5 instead of Qt 4
media-video/subtitlecomposer:mpv - Build mpv backend support
media-video/syncplay:client - Install Syncplay client
media-video/syncplay:gui - Enable gui support
media-video/syncplay:server - Install Syncplay server
media-video/syncplay:vlc - Enable VLC2.x support
media-video/totem:lirc - Enable support for controlling Totem with a remote control using app-misc/lirc
media-video/totem:nautilus - Enable the nautilus extension
media-video/totem:python - Build support for dev-lang/python plugins
media-video/totem:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
media-video/transcode:mjpeg - Enables mjpegtools support
media-video/transcode:nuv - NuppelVideo container format demuxing
media-video/transcode:pic - disable optimized assembly code that is not PIC friendly
media-video/transcode:postproc - Build with ffmpeg libpostproc support
media-video/tsmuxer:qt4 - Installs tsMuxerGUI (needs Qt4)
media-video/vdr:alternatechannel - Use alternate channel on record
media-video/vdr:bidi - fribidi support, for languages, written from right to left
media-video/vdr:ddepgentry - remove duplicate EPG entries
media-video/vdr:dvlvidprefer - controls video-dir choice on recording
media-video/vdr:graphtft - support for media-plugins/vdr-graphtftplugin up from version 0.1.7
media-video/vdr:html - Install HTML documentation
media-video/vdr:jumpingseconds - skip seconds in played records
media-video/vdr:jumpplay - Enables automatic jumping over cut marks while watching a recording
media-video/vdr:kbd - enable keyboard support as remote device
media-video/vdr:mainmenuhooks - Allows to replace main menu entries by some special plugins (like epgsearch, extrecmenu, ...)
media-video/vdr:menuorg - Enables support for the media-plugins/vdr-menuorg
media-video/vdr:menuselection - adds support for menu hotkeys of double digits
media-video/vdr:naludump - Removes NALU fill data from h.264-Streams of TS files
media-video/vdr:permashift - permanent timeshift by recording live TV on hard disk, need plugin media-plugins/vdr-permashift
media-video/vdr:permashift_v1 - permanent timeshift by recording live TV on RAM, need plugin >=mediaplugins/vdr-permashift-1
media-video/vdr:pinplugin - Support for media-plugins/vdr-pin
media-video/vdr:resumereset - rreset resume of EOF
media-video/vdr:rotor - Enable support for plugin media-plugins/vdr-rotor for dish-positioner.
media-video/vdr:ttxtsubs - support for media-plugins/vdr-ttxtsubs
media-video/vdr:vasarajanauloja - replacement for the liemikuutio patch, adds some nice must haves features
media-video/vdr:wareagleicon - Replace original icon set in menu
media-video/vdr:yaepg - Enables support for the vdr-yaepg plugin
media-video/vlc:X - Enables support for, e.g., fullscreen mode via the X Window System. By itself, this flag does not build a graphical interface.
media-video/vlc:atmo - Enables support for AtmoLight (homebrew Ambient Lighting Technology)
media-video/vlc:audioqueue - Enables AudioQueue audio module for Mac OS X.
media-video/vlc:avcodec - Enables libavcodec support for video/audio encoding/decoding. libavcodec is part of FFmpeg.
media-video/vlc:avformat - Enables libformat support for reading and writing various media containers. libavformat is part of FFmpeg.
media-video/vlc:bluray - Enables libbluray for Blu-ray disc support.
media-video/vlc:chromaprint - Enables libchromaprint for Chromaprint based audio fingerprinter support.
media-video/vlc:chromecast - Enable experimental support for Google Chromecast.
media-video/vlc:dc1394 - Enables IIDC cameras support.
media-video/vlc:directx - Enable Win32 DirectX support.
media-video/vlc:dvbpsi - Enables support for Mpeg-TS files (.ts, .m2ts, .mts) via media-libs/libdvbpsi.
media-video/vlc:dxva2 - Enables Win32 DxVA2 support.
media-video/vlc:faad - Enable AAC audio decoding library support via media-libs/faad2.
media-video/vlc:fdk - Enables the Fraunhofer AAC codec library.
media-video/vlc:fluidsynth - Enables Fluidsynth MIDI software synthesis (with external sound fonts).
media-video/vlc:gcrypt - Enables cryptography support via libgcrypt.
media-video/vlc:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-video/vlc:gnome - Adds support for GNOME's filesystem abstraction layer, gnome-base/gnome-vfs. This flag is not GUI-related.
media-video/vlc:growl - Enables growl notification support (over UDP for remote access and native on OSX)
media-video/vlc:gstreamer - Enables GStreamer based decoding support (currently supports only video decoding)
media-video/vlc:httpd - Enables a web based interface for vlc.
media-video/vlc:kate - Adds support for Ogg Kate subtitles via libkate.
media-video/vlc:libtar - Uses libtar instead of the built-in tar reader for reading custom skins.
media-video/vlc:libtiger - Enables Ogg Kate subtitles rendering using libtiger.
media-video/vlc:linsys - Enables support for Linux Linear Systems Ltd. SDI and HD-SDI input cards.
media-video/vlc:live - Enables live555 streaming media support (client support for rtsp).
media-video/vlc:lua - Enable Lua scripting support, needed for including support for Jamendo (online music platform) and similar things.
media-video/vlc:macosx-dialog-provider - Enables Mac OS X dialog module.
media-video/vlc:macosx-eyetv - Enables Mac OS X EyeTV (TNT Tuner) module.
media-video/vlc:macosx-notifications - Enables Mac OS X notifications module (formerly growl).
media-video/vlc:macosx-qtkit - Enables Mac OS X qtkit module: qtcapture (video) and qtsound (audio) module.
media-video/vlc:macosx-quartztext - Enables Mac OS X quartz text module.
media-video/vlc:matroska - Enables matroska support using reference libraries (fallback on other existing matroska support if disabled, i.e., matroska enabled FFmpeg)
media-video/vlc:mpeg - Add libmpeg2 support for mpeg-1 and mpeg-2 video streams
media-video/vlc:omxil - Enables OpenMAX Integration Layer codec module.
media-video/vlc:opencv - Enabled OpenCV (computer vision) filter module.
media-video/vlc:optimisememory - Enable optimisation for memory rather than performance.
media-video/vlc:opus - Support opus decoding via libopus.
media-video/vlc:postproc - Enables image post-processing via libpostproc (part of FFmpeg).
media-video/vlc:projectm - Enables the projectM visualization plugin.
media-video/vlc:qt4 - Builds a Qt4 based frontend, a graphical interface.
media-video/vlc:qt5 - Builds a Qt5 based frontend, a graphical interface (overrides qt4).
media-video/vlc:rtsp - Enables real audio and RTSP modules.
media-video/vlc:run-as-root - Allows vlc to start for root. Don't enable this unless you have a very specific (e.g. embedded) need for it!
media-video/vlc:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/vlc:sdl-image - Enables sdl image video decoder (depends on sdl)
media-video/vlc:sftp - Enables libssh2 to support SFTP file transfer.
media-video/vlc:shout - Enables libshout output.
media-video/vlc:sid - Adds support for playing C64 SID files through media-libs/libsidplay:2.
media-video/vlc:skins - Enables support for the skins2 interface.
media-video/vlc:swscale - Enables image scaling and conversion via libswscale (part of FFmpeg).
media-video/vlc:tremor - Enables tremor, a fixed-point version of the Ogg Vorbis decoder.
media-video/vlc:twolame - Enables twolame support (MPEG Audio Layer 2 encoder).
media-video/vlc:upnp - Enables support for the Intel SDK stack based UPnP discovery module instead of CyberLink.
media-video/vlc:vcdx - Enables VCD with navigation via libvcdinfo (depends on cdio)
media-video/vlc:vlm - New videolan (media) manager (vlm), a little manager designed to launch and manage multiple streams from within one instance of VLC.
media-video/vlc:vpx - Enables the decoder(s) from the WebM VP8 / VP9 Codec SDK.
media-video/vlc:wma-fixed - Enables fixed point WMA decoder.
media-video/vlc:x265 - Support X265 Encoder.
media-video/vlc:xcb - Support the X C-language Binding, a replacement for Xlib; !!! you will need this option to be able to integrate video in the Qt interface, see bug #500678.
media-video/vlc:zeroconf - Enables support for zero-configuration networking via avahi.
media-video/vlc:zvbi - Enables support for teletext subtitles via the zvbi library.
media-video/x264-encoder:10bit - Set output bit depth to 10
media-video/x264-encoder:avs - enable AvxSynth support in the AviSynth input module
media-video/x264-encoder:ffmpegsource - Enable ffmpegsource aka ffms support, disables lavf
media-video/x264-encoder:interlaced - Enable interlaced encoding support, this can decrease encoding speed by up to 2%
media-video/xine-ui:vdr - Enables Video Disk Recorder support
net-analyzer/2ping:server - Install the server init scripts.
net-analyzer/aimsniff:http - Install the WAS (Web AIM Sniff) frontend
net-analyzer/argus-clients:ft - Enable support for flow packets through net-analyzer/flow-tools
net-analyzer/barnyard:sguil - Enable sguil (The Analyst Console for Network Security Monitoring) support
net-analyzer/barnyard2:gre - Enable GRE support
net-analyzer/barnyard2:mpls - Enable support for mpls networks
net-analyzer/bro:broccoli - Enable the Bro Client Communication Library
net-analyzer/bro:broctl - An interactive shell for managing Bro installations
net-analyzer/bro:broker - Bro's new Messaging Library (experimental)
net-analyzer/bro:geoip - Enable support for Maxmind's GeoIP library
net-analyzer/bro:ipv6 - Support for mobile IPv6
net-analyzer/bro:jemalloc - Support for the Jemalloc allocator
net-analyzer/bro:python - Enable Python bindings
net-analyzer/bro:ruby - Enable Ruby bindings (deprecated)
net-analyzer/bro:tcmalloc - Enable Google's Performance Analysis Tools
net-analyzer/bro:tools - Small auxiliary tools for Bro
net-analyzer/bwm-ng:csv - Enable csv output
net-analyzer/bwm-ng:html - Enable html output
net-analyzer/cacti:doc - install html documentation
net-analyzer/check_mk:agent-only - Install only the check_mk agent.
net-analyzer/check_mk:apache_status - Install check_mk-agent apache-status plugin.
net-analyzer/check_mk:dmi_sysinfo - Install check_mk-agent dmi_sysinfo plugin.
net-analyzer/check_mk:livestatus - Enable livestatus.
net-analyzer/check_mk:logwatch - Install check_mk-agent logwatch plugin.
net-analyzer/check_mk:mysql - Install check_mk-agent mysql plugin.
net-analyzer/check_mk:nagios4 - Depend on net-analyzer/nagios-core-4
net-analyzer/check_mk:nfsexports - Install check_mk-agent nfsexports plugin.
net-analyzer/check_mk:postgres - Install check_mk-agent postgres plugin.
net-analyzer/check_mk:smart - Install check_mk-agent S.M.A.R.T plugin.
net-analyzer/check_mk:wato - Enable check_mk WATO - check_mk's Web Administration Tool.
net-analyzer/check_mk:zypper - Install check_mk-agent zypper plugin.
net-analyzer/check_mk_agent:apache_status - Install check_mk-agent apache-status plugin.
net-analyzer/check_mk_agent:logwatch - Install check_mk-agent logwatch plugin.
net-analyzer/check_mk_agent:mysql - Install check_mk-agent mysql plugin.
net-analyzer/check_mk_agent:nfsexports - Install check_mk-agent nfsexports plugin.
net-analyzer/check_mk_agent:postgres - Install check_mk-agent postgres plugin.
net-analyzer/check_mk_agent:smart - Install check_mk-agent S.M.A.R.T plugin.
net-analyzer/check_mk_agent:zypper - Install check_mk-agent zypper plugin.
net-analyzer/echoping:http - enable support for http protocol.
net-analyzer/echoping:icp - enable support for ICP (used to monitor proxies).
net-analyzer/echoping:priority - enable socket priority support.
net-analyzer/echoping:smtp - enable support for SMTP protocol.
net-analyzer/echoping:tos - enable support for TOS (TYpe Of Service).
net-analyzer/ettercap:plugins - Install ettercap plugins (et_*.so)
net-analyzer/flent:plots - Enable drawing plots
net-analyzer/flowgrind:pcap - Enable packet capturing support using net-libs/libpcap
net-analyzer/fprobe:messages - enable console messages
net-analyzer/goaccess:btree - Enable Tokyo Cabinet's on-disk B+ Tree database backend
net-analyzer/goaccess:getline - Use GNU getline() to parse full line requests
net-analyzer/goaccess:memhash - Enable Tokyo Cabinet's on-memory hash database backend
net-analyzer/goaccess:tokyocabinet - Enable Tokyo Cabinet's on-memory hash database backend
net-analyzer/gr-fosphor:glfw - enable GLFW based interface
net-analyzer/graphite-web:carbon - Enable carbon support
net-analyzer/graphite-web:memcached - Enable memcached support
net-analyzer/hexinject:experimental - Install experimental packets.tcl
net-analyzer/hexinject:tools - Install hex2raw and prettypacket tools
net-analyzer/httping:tfo - Enable support for TCP Fast Open
net-analyzer/hydra:ncp - NCP protocol (NetWare) support through net-fs/ncpfs
net-analyzer/icinga:contrib - additional scripts
net-analyzer/icinga:eventhandler - Adds support for running custom scripts whenever a host or service state change occurs
net-analyzer/icinga:idoutils - Adds DB support
net-analyzer/icinga:lighttpd - Adds Lighttpd support
net-analyzer/icinga:plugins - Adds support for nagios plugins
net-analyzer/icinga:web - Adds generic web interface support
net-analyzer/icinga-web:pnp - Enables pnp4nagios integration
net-analyzer/icinga2:classicui - Adds support for the old interface
net-analyzer/icinga2:console - Adds support for line-editing in the console
net-analyzer/icinga2:lto - Adds support for link time optimization
net-analyzer/icinga2:mail - Allows for mailing of alerts
net-analyzer/icinga2:nano-syntax - Adds support for syntax used in the nano editor
net-analyzer/icinga2:plugins - Adds support for nagios plugins
net-analyzer/icinga2:studio - Adds support for Icinga-studio
net-analyzer/ipsumdump:nanotimestamp - Enable timestamps with nano-second resolution
net-analyzer/linkchecker:sqlite - Mozilla Bookmark parsing
net-analyzer/mate-netspeed:gtk3 - Build with GTK+3 instead of GTK+2
net-analyzer/metasploit:development - Install dependencies needed for metasploit and exploit development
net-analyzer/metasploit:nexpose - Enable the plugin to integrate with nexpose
net-analyzer/metasploit:openvas - Enable the plugin to integrate net-analyzer/openvas
net-analyzer/metasploit:oracle - Enable restricted oracle modules which have additional deps
net-analyzer/metasploit:pcap - Enable libpcap for packet sniffing
net-analyzer/mk-livestatus:nagios4 - Generate a net-analyzer/nagios-4 compatible plugin
net-analyzer/monitoring-plugins:dns - Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:fping - Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:game - Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:snmp - Install dev-perl/Net-SNMP and net-analyzer/net-snmp required for monitoring SNMP values. Disabling the flag does not remove any plugins.
net-analyzer/monitoring-plugins:ssh - Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugins.
net-analyzer/munin:apache - Set up the configuration of the CGI generation of HTML and graphs to work with Apache. This also install an include-able configuration file.
net-analyzer/munin:asterisk - Install the packages required for monitoring Asterisk. Disabling the flag does not remove any plugin files.
net-analyzer/munin:cgi - Install the CGI-compatible scripts for on-the-fly generation of web pages and graphs. This is only meaningful if the minimal USE flag is disabled.
net-analyzer/munin:dhcpd - Install dev-perl/Net-IP, dev-perl/HTTP-Date and net-misc/dhcp to monitor DHCP lease usage. This only works if the server is on the same system as the node, so the server is also brought in. Disabling the flag does not remove any plugin file.
net-analyzer/munin:doc - Build and install a local copy of the HTML documentation for the whole software. This requires dev-python/sphinx to process the documentation sources.
net-analyzer/munin:http - Install dev-perl/libwww-perl required for monitoring HTTP-based services such as Apache and nginx. Disabling the flag does not remove any plugin file.
net-analyzer/munin:ipmi - Install sys-apps/ipmitool required for monitoring IPMI sensors. Disabling the flag does not remove any plugin file.
net-analyzer/munin:ipv6 - Add support for IPv6 in munin-node. IPv6 support for the master is always enabled, but the node requires a newer version of dev-perl/Net-Server, capable of listening to IPv6 sockets.
net-analyzer/munin:irc - Install the packages required for monitoring IRC. Disabling the flag does not remove any plugin files.
net-analyzer/munin:java - Build the Java-based plugins to monitor JMX-compatible applications. Disabling the flag removes the jmx monitoring plugins.
net-analyzer/munin:memcached - Install the packages required for memcached monitoring. Disabling the flag does not remove any plugin files.
net-analyzer/munin:minimal - Only install munin-node and its plugins. This excludes the scripts to generate the web pages and the graphs.
net-analyzer/munin:mysql - Install the packages required for monitoring MySQL. Disabling the flag does not remove any plugin files.
net-analyzer/munin:postgres - Install the packages required for monitoring PostgreSQL. Disabling the flag does not remove any plugin files.
net-analyzer/munin:syslog - Configure the node by default to log on syslog. This requires the presence of virtual/perl-Sys-Syslog. As of version 2.0.2, the master scripts only log to file, and not to syslog.
net-analyzer/nagios-core:classicui - use the classic web theme
net-analyzer/nagios-core:lighttpd - install www-servers/lighttpd config
net-analyzer/nagios-core:web - enable web interface
net-analyzer/nagios-plugin-check_raid:3ware - Support 3ware RAID controllers
net-analyzer/nagios-plugin-check_raid:aacraid - Support Adaptec AAC-RAID controllers
net-analyzer/nagios-plugin-check_raid:dmraid - Support Device-Mapper RAID
net-analyzer/nagios-plugin-check_raid:hpa - Support HP Array controllers
net-analyzer/nagios-plugin-check_raid:hpsa - Support HP SmartArray (CCISS) controllers
net-analyzer/nagios-plugin-check_raid:i2o - Support DPT-I2O controllers (mostly Adaptec)
net-analyzer/nagios-plugin-check_raid:megaraid-sas - Support LSI MegaRAID SAS controllers
net-analyzer/nagios-plugin-check_raid:megaraid-scsi - Support LSI MegaRAID SCSI controllers
net-analyzer/nagios-plugin-check_raid:mpt - Support LSI MPT Fusion controllers
net-analyzer/nagios-plugin-check_raid:mpt-sas2 - Support LSI SAS-2 controllers
net-analyzer/nagios-plugins:nagios-dns - Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-game - Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-ping - Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:snmp - Install dev-perl/Net-SNMP required for monitoring SNMP values. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:ssh - Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins-flameeyes:smart - Install sys-apps/smartmontools required for S.M.A.R.T. disk monitoring. Disabling the flag removes the plugin file. This plugin also requires the sudo flag to be enable.
net-analyzer/nagvis:automap - Enable automated map generation using media-gfx/graphviz
net-analyzer/net-snmp:elf - Enable the use of elf utils to check uptime on some systems
net-analyzer/net-snmp:mfd-rewrites - Use MFD rewrites of mib modules where available
net-analyzer/net-snmp:netlink - Use dev-libs/libnl to fetch TCP statistics instead of using /proc/net/tcp (Linux only).
net-analyzer/net-snmp:pci - Use libpci (from sys-apps/pciutils) to look up network interface description. This feature is only available on Linux.
net-analyzer/net-snmp:rpm - Enable monitoring of app-arch/rpm. This flag requires the bzip2 and zlib flags to be enabled as well.
net-analyzer/net-snmp:smux - Enable support for the legacy smux protocol (superseded by agentx)
net-analyzer/net-snmp:ucd-compat - Build UCD compatibility library. Increases significantly the install size.
net-analyzer/netdata:compression - Enable compression via zlib
net-analyzer/netdata:ipmi - Install sys-apps/ipmitool required for monitoring IPMI sensors.
net-analyzer/netdata:nfacct - Enable the nfacct plugin
net-analyzer/netdata:nodejs - Enable use of nodejs (which some plugins use)
net-analyzer/netperf:demo - Emit interim results during the run. May affect results
net-analyzer/nfdump:compat15 - Enable read support for nfdump data files created with nfdump 1.5.x
net-analyzer/nfdump:ftconv - Build the flow-tools to nfdump converter
net-analyzer/nfdump:nfprofile - Build nfprofile used by NfSen
net-analyzer/nfdump:nftrack - Build nfprofile used by PortTracker
net-analyzer/nfdump:readpcap - Build nfcapd collector to read from pcap file instead ofnetwork data
net-analyzer/nfdump:sflow - Build sflow collector sfcpad
net-analyzer/nmap:ncat - Install the ncat utility
net-analyzer/nmap:ndiff - Install the ndiff utility
net-analyzer/nmap:nmap-update - Install nmap-update, which uses dev-vcs/subversion to update nmap scripts in your home directory
net-analyzer/nmap:nping - Install the nping utility
net-analyzer/nmap:nse - Include support for the Nmap Scripting Engine (NSE)
net-analyzer/nmap:system-lua - Use dev-lang/lua instead of the bundled liblua
net-analyzer/nmap:zenmap - Install the GTK+ based nmap GUI, zenmap
net-analyzer/nrpe:command-args - Build support for specifying the command-line arguments from the Nagios/Icinga master. Make sure you understand the implications of this flag as it can be a security risk.
net-analyzer/nrpe:minimal - Only build the check plugins for Nagios/Icinga, and not the daemon.
net-analyzer/nsca:crypt - Build support for crypted communication with nsca, through dev-libs/libmcrypt. It's recommended not to disable this flag unless all the communication will be handled in an absolutely safe environment.
net-analyzer/nsca:minimal - Only build and install the send_nsca command and not the daemon. This allows a very minimal install with no overhead when setting up a node.
net-analyzer/openvas:pdf - Enable pdf report creation
net-analyzer/pchar:pcap - Use the net-libs/libpcap library
net-analyzer/pinger:gtk2 - Install the gtkpinger GUI utility based on x11-libs/gtk+:2
net-analyzer/pinger:gtk3 - Install the gtkpinger GUI utility based on x11-libs/gtk+:3
net-analyzer/pmacct:64bit - Use 64bit counters instead of 32bit ones
net-analyzer/pmacct:geoipv2 - Add support for GeoIP2 through dev-libs/libmaxminddb
net-analyzer/pmacct:jansson - Add support for JSON through dev-libs/jansson
net-analyzer/pmacct:kafka - Add support for Apache Kafka through dev-libs/librdkafka
net-analyzer/pmacct:mongodb - Add support for mongodb backend
net-analyzer/pmacct:nflog - Add support for NFLOG through uacctd
net-analyzer/pmacct:rabbitmq - Add support for RabbitMQ through net-libs/rabbitmq-c
net-analyzer/pmacct:ulog - Enable support for ULOG in older kernels (deprecated)
net-analyzer/prelude-lml:tls - Enables Prelude LML support Syslog through TLS using net-libs/gnutls.
net-analyzer/rrdcollect:exec - Enable exec:/// support
net-analyzer/rrdcollect:librrd - Use the librrd library from net-analyzer/rrdtool
net-analyzer/rrdtool:graph - Enable support for graphing functions
net-analyzer/rrdtool:rados - Enable support for librados from sys-cluster/ceph
net-analyzer/rrdtool:rrdcgi - Build rrdcgi support
net-analyzer/sancp:sguil - Enable sguil (The Analyst Console for Network Security Monitoring) support
net-analyzer/sarg:gd - Enable support for graphs in reports through media-libs/gd
net-analyzer/sarg:pcre - Enable support for regular expressions in the hostalias file through dev-libs/libpcre
net-analyzer/scanlogd:nids - Use net-libs/libnids for packet capturing
net-analyzer/scanlogd:pcap - Use net-libs/libpcap for packet capturing
net-analyzer/scapy:pyx - Enable dev-python/pyx support for psdump/pdfdump commands
net-analyzer/scapy:tcpreplay - Enable net-analyzer/tcpreplay support for fast packet replay
net-analyzer/scapy:visual - Enable dev-python/visual support for 3d graphs
net-analyzer/smokeping:dig - Install net-dns/bind-tools for dig functionality
net-analyzer/smokeping:echoping - Install net-analyzer/echoping for echoping functionality
net-analyzer/smokeping:ssh - Install ssh functionality
net-analyzer/smokeping:telnet - Install dev-perl/Net-Telnet for telnet functionality
net-analyzer/snort:active-response - Enables support for automatically sending TCP resets and ICMP unreachable messages to terminate connections. Used with inline deployments.
net-analyzer/snort:control-socket - Enables Snort's control socket.
net-analyzer/snort:dynamicplugin - Enable ability to dynamically load preprocessors, detection engine, and rules library. This is required if you want to use shared object (SO) snort rules.
net-analyzer/snort:file-inspect - Enables extended file inspection capabilities.
net-analyzer/snort:flexresp3 - Enables support for new flexable response preprocessor for enabling connection tearing for inline deployments. Replaces flexresp and flexresp2.
net-analyzer/snort:gre - Enable support for inspecting and processing Generic Routing Encapsulation (GRE) packet headders. Only needed if you are monitoring GRE tunnels.
net-analyzer/snort:high-availability - Enables high-availability state sharing.
net-analyzer/snort:inline-init-failopen - Enables support to allow traffic to pass (fail-open) through inline deployments while snort is starting and not ready to begin inspecting traffic. If this option is not enabled, network traffic will not pass (fail-closed) until snort has fully started and is ready to perform packet inspection.
net-analyzer/snort:large-pcap-64bit - Allows Snort to read pcap files that are larger than 2 GB. ONLY VALID FOR 64bit SYSTEMS!
net-analyzer/snort:linux-smp-stats - Enable accurate statistics reporting through /proc on systems with multipule processors.
net-analyzer/snort:mpls - Enables support for processing and inspecting Multiprotocol Label Switching MPLS network network traffic. Only needed if you are monitoring an MPLS network.
net-analyzer/snort:non-ether-decoders - Enable decoding of non-ethernet protocols such as TokenRing, FDDI, IPX, etc.
net-analyzer/snort:normalizer - Enables support for normalizing packets in inline deployments to help minimize the chances of detection evasion.
net-analyzer/snort:paf - Enables support for Protocol Aware Flushing. This allows Snort to statefully scan a stream and reassemble a complete protocol data unit regardless of segmentation.
net-analyzer/snort:perfprofiling - Enables support for preprocessor and rule performance profiling using the perfmonitor preprocessor.
net-analyzer/snort:ppm - Enables support for setting per rule or per packet latency limits. Helps protect against introducing network latency with inline deployments.
net-analyzer/snort:react - Enables support for the react rule keyword. Supports interception, termination, and redirection of HTTP connections.
net-analyzer/snort:reload-error-restart - Enables support for completely restarting snort if an error is detected durring a reload.
net-analyzer/snort:shared-rep - Enables the use of shared memory for the Reputation Preprocessor (Only available on Linux systems)
net-analyzer/snort:side-channel - Enables Snort's the side channel.
net-analyzer/snort:sourcefire - Enables Sourcefire specific build options, which include --enable-perfprofiling and --enable-ppm.
net-analyzer/snort:targetbased - Enables support in snort for using a host attibute XML file (attribute_table.dtd). This file needs to be created by the user and should define the IP address, operating system, and services for all hosts on the monitored network. This is cumbersome, but can improve intrusion detection accuracy.
net-analyzer/snort:zlib - Enables HTTP inspection of compressed web traffic. Requires dynamicplugin be enabled.
net-analyzer/suricata:af-packet - Enable AF_PACKET support
net-analyzer/suricata:control-socket - Enable unix socket
net-analyzer/suricata:cuda - Enable NVIDIA Cuda computations support
net-analyzer/suricata:detection - Enable detection modules
net-analyzer/suricata:logrotate - Install logrotate rule
net-analyzer/suricata:luajit - Enable Luajit support
net-analyzer/suricata:nflog - Enable libnetfilter_log support
net-analyzer/suricata:nfqueue - Enable NFQUEUE support for inline IDP
net-analyzer/suricata:redis - Enable Redis support
net-analyzer/suricata:rules - Install default ruleset
net-analyzer/symon:perl - Enables a generic perl symux client
net-analyzer/symon:symon - Enables the system monitor. Offers no functionality but monitoring and forwarding of measured data
net-analyzer/symon:symux - Enables the multiplexer which stores incoming symon streams on disk in RRD (net-analyzer/rrdtool) files
net-analyzer/tcpdump:drop-root - Drop privileges to tcpdump:tcpdump when run as root
net-analyzer/tcpdump:smi - Build with net-libs/libsmi to load MIBs on the fly to decode SNMP packets
net-analyzer/tcpreplay:pcapnav - Enable if you want the jump to byte offset feature via net-libs/libpcapnav
net-analyzer/tcpreplay:tcpdump - Use net-analyzer/tcpdump for packet decoding feature
net-analyzer/testssl:bundled-openssl - Install precompiled versions of OpenSSL for greater testing coverage
net-analyzer/wireshark:adns - Use the GNU net-dns/c-ares library to resolve DNS names
net-analyzer/wireshark:androiddump - Install androiddump, an extcap interface to capture from Android devices
net-analyzer/wireshark:capinfos - Install capinfos, to print information about capture files
net-analyzer/wireshark:captype - Install captype, to print the file types of capture files
net-analyzer/wireshark:ciscodump - Install ciscodump, extcap interface to capture from a remote Cisco router
net-analyzer/wireshark:crypt - Use dev-libs/libgcrypt to decrypt traffic
net-analyzer/wireshark:dftest - Install dftest, to display filter byte-code, for debugging dfilter routines
net-analyzer/wireshark:doc-pdf - Build documentation in pdf format (US and a4 paper sizes)
net-analyzer/wireshark:dumpcap - Install dumpcap, to dump network traffic from inside wireshark
net-analyzer/wireshark:editcap - Install editcap, to edit and/or translate the format of capture files
net-analyzer/wireshark:libssh - Use net-libs/libssh (for sshdump)
net-analyzer/wireshark:libxml2 - Use dev-libs/libxml2 for handling XML configuration in dissectors
net-analyzer/wireshark:mergecap - Install mergecap, to merge two or more capture files into one
net-analyzer/wireshark:netlink - Use dev-libs/libnl
net-analyzer/wireshark:nghttp2 - Use net-libs/nghttp2 for HTTP/2 support
net-analyzer/wireshark:pcap - Use net-libs/libpcap for network packet capturing (build dumpcap, rawshark)
net-analyzer/wireshark:randpkt - Install randpkt, a utility for creating pcap trace files full of random packets
net-analyzer/wireshark:randpktdump - Install randpktdump, an extcap interface to provide access to the random packet generator (randpkt)
net-analyzer/wireshark:reordercap - Install reordercap, to reorder input file by timestamp into output file
net-analyzer/wireshark:sbc - Use media-libs/sbc for playing back SBC encoded packets
net-analyzer/wireshark:sharkd - Install sharkd, the daemon variant of wireshark
net-analyzer/wireshark:smi - Use net-libs/libsmi to resolve numeric OIDs into human readable format
net-analyzer/wireshark:snappy - Use app-arch/snappy for snappy compression and decompression
net-analyzer/wireshark:spandsp - Use media-libs/spandsp for for G.722 and G.726 codec support in the RTP Player
net-analyzer/wireshark:sshdump - Install sshdump, an extcap interface to capture from a remote host through SSH
net-analyzer/wireshark:text2pcap - Install text2pcap, to generate a capture file from an ASCII hexdump of packets
net-analyzer/wireshark:tfshark - Install tfshark, a terminal-based version of the FileShark capability
net-analyzer/wireshark:tshark - Install tshark, to dump and analyzer network traffic from the command line
net-analyzer/wireshark:udpdump - Install udpdumpi, to get packets exported from a source (like a network device or a GSMTAP producer) that are dumped to a pcap file
net-analyzer/zabbix:agent - Enable zabbix agent (for to-be-monitored machines)
net-analyzer/zabbix:frontend - Enable zabbix web frontend
net-analyzer/zabbix:ipv6 - Turn on support of IPv6
net-analyzer/zabbix:java - Enable Zabbix Java JMX Management Gateway
net-analyzer/zabbix:libxml2 - Use libxml2 client library
net-analyzer/zabbix:odbc - Enable Database Monitor and use UnixODBC Library by default
net-analyzer/zabbix:openipmi - Enable openipmi things
net-analyzer/zabbix:proxy - Enable proxy support
net-analyzer/zabbix:server - Enable zabbix server
net-analyzer/zabbix:ssh - SSH v2 based checks
net-analyzer/zabbix:static - Build statically linked binaries
net-analyzer/zmap:json - Add support to store results JSON based
net-analyzer/zmap:mongo - Add support for storing in a mongo DB via dev-db/mongodb
net-analyzer/zmap:redis - Add support for storing in a redis DB via dev-libs/hiredis
net-dialup/accel-ppp:ipoe - Build IPoE kernel module
net-dialup/accel-ppp:shaper - Support for traffic shaping
net-dialup/accel-ppp:valgrind - Compile in valgrind hints
net-dialup/freeradius:pcap - Build the RADIUS sniffer which requires net-libs/libpcap.
net-dialup/freeradius-client:scp - Add service type hints derived from username prefix
net-dialup/freeradius-client:shadow - Enable shadow password support
net-dialup/mgetty:fax - Enables fax support
net-dialup/mgetty:fidonet - Enables FidoNet support
net-dialup/ppp:activefilter - Enables active filter support
net-dialup/ppp:atm - Enables ATM (Asynchronous Transfer Mode) protocol support
net-dialup/ppp:dhcp - Installs PPP DHCP client plugin for IP address allocation by a DHCP server (see http://www.netservers.co.uk/gpl/)
net-dialup/ppp:eap-tls - Enables support for Extensible Authentication Protocol and Transport Level Security (see http://www.nikhef.nl/~janjust/ppp/index.html)
net-dialup/ppp:gtk - Installs GTK+ password prompting program that can be used by passprompt.so PPP plugin for reading the password from a X11 input terminal
net-dialup/ppp:ipv6 - Enables support for IP version 6
net-dialup/ppp:pam - Enables PAM (Pluggable Authentication Modules) support
net-dialup/ppp:radius - Enables RADIUS support
net-dialup/xl2tpd:dnsretry - Patch for host lookup retries, activated by redial feature
net-dialup/xl2tpd:kernel - Enable kernel interface for PPPoL2TP
net-dns/avahi:autoipd - Build and install the IPv4LL (RFC3927) network address configuration daemon
net-dns/avahi:bookmarks - Install the avahi-bookmarks application (requires dev-python/twisted)
net-dns/avahi:gtk3 - Build the avahi-ui-gtk3 library, and use gtk3 for the avahi utilities under USE=utils
net-dns/avahi:howl-compat - Enable compat libraries for howl
net-dns/avahi:introspection - Use dev-libs/gobject-introspection for introspection
net-dns/avahi:mdnsresponder-compat - Enable compat libraries for mDNSResponder
net-dns/avahi:utils - Install the avahi gtk+ utils avahi-discover, bssh, and bvnc
net-dns/bind:dlz - Enables dynamic loaded zones, 3rd party extension
net-dns/bind:dnstap - Enables dnstap packet logging
net-dns/bind:filter-aaaa - Enable filtering of AAAA records over IPv4
net-dns/bind:fixed-rrset - Enables fixed rrset-order option
net-dns/bind:gost - Enables gost OpenSSL engine support
net-dns/bind:gssapi - Enable gssapi support
net-dns/bind:json - Enable JSON statistics channel
net-dns/bind:lmdb - Enable LMDB support to store configuration for 'addzone' zones
net-dns/bind:nslint - Build and install the nslint util
net-dns/bind:rpz - Enable response policy rewriting (rpz)
net-dns/bind:urandom - Use /dev/urandom instead of /dev/random
net-dns/bind-tools:gost - Enables gost OpenSSL engine support
net-dns/bind-tools:gssapi - Enable gssapi support
net-dns/bind-tools:urandom - Use /dev/urandom instead of /dev/random
net-dns/ddclient:cloudflare - Enable support for updating IP address via CloudFlare
net-dns/ddclient:hardened - Use iproute2 instead of ifconfig to grab an IP address
net-dns/dnsdist:dnscrypt - Enable the ability to act as a DNSCrypt server
net-dns/dnsdist:luajit - Use dev-lang/luajit instead of dev-lang/lua
net-dns/dnsdist:regex - Enable support for regular expression matching via dev-libs/re2
net-dns/dnsdist:remote-logging - Enable support for remote logging via dev-libs/protobuf
net-dns/dnsdist:ssl - Enable support for and encrypted client-server communication via dev-libs/libsodium
net-dns/dnsmasq:auth-dns - Add support for acting as an authorative DNS server.
net-dns/dnsmasq:conntrack - Add support for Linux conntrack connection marking.
net-dns/dnsmasq:dhcp - Enable support for acting as a DHCP server.
net-dns/dnsmasq:dhcp-tools - Install extra command line tools for manually managing DHCP leases.
net-dns/dnsmasq:dnssec - Enable support DNSSEC validation and caching.
net-dns/dnsmasq:id - Whether report *.bind CHAOS info to clients, otherwise forward such requests upstream instead
net-dns/dnsmasq:libidn2 - Enable support for Internationalized Domain Names, via net-dns/libidn2 rather than net-dns/libidn
net-dns/dnsmasq:script - Enable support for calling scripts when leases change.
net-dns/dnsmasq:tftp - Enables built in TFTP server for netbooting.
net-dns/hash-slinger:ipsec - Enable support for IPSECKEY records (ipseckey)
net-dns/hash-slinger:openpgp - Enable support for OPENPGPKEY records (openpgpkey)
net-dns/hash-slinger:ssh - Enable support for SSHFP records (sshfp)
net-dns/knot:dnstap - Include support for the dnstap binary log format (http://dnstap.info/).
net-dns/knot:fastparser - Use a zone file parser that is faster, but requires more memory and CPU time to compile.
net-dns/ldns-utils:dane - Enable DNS-based Authentication of Named Entities (DANE) support
net-dns/ldns-utils:ecdsa - Enable ECDSA support
net-dns/ldns-utils:gost - Enable GOST support
net-dns/maradns:authonly - Allows one to build only authoritative DNS server
net-dns/mydns:alias - Enable David Phillips aliasing
net-dns/mydns:status - Enable the STATUS opcode to check server status
net-dns/nsd:bind8-stats - Enables BIND8 like NSTATS and XSTATS
net-dns/nsd:libevent - Use libevent or libev, useful when zone count is high
net-dns/nsd:minimal-responses - If minimal responses are disabled, responses are more likely to get truncated, resulting in TCP fallback
net-dns/nsd:munin - Install a plugin for net-analyzer/munin to graph statistical data from nsd.
net-dns/nsd:nsec3 - Enable NSEC3 support
net-dns/nsd:ratelimit - Enables ratelimiting, based on query name, type and source
net-dns/nsd:root-server - Configure NSD as a root server
net-dns/nsd:runtime-checks - Enable runtime checks, this could lead to a reduced service level
net-dns/opendnssec:auditor - Enables auditing capabilities for OpenDNSSEC
net-dns/opendnssec:eppclient - Enables support for automatic submission of DNSSEC keys to an upstream epp server
net-dns/opendnssec:external-hsm - Enables support for storing DNSSEC keys through an arbitrary non-portage PKCS#11 interface, specified through an environment variable
net-dns/opendnssec:opensc - Enables support for storing DNSSEC keys through a dev-libs/opensc PKCS#11 interface
net-dns/opendnssec:signer - Enables signing capabilities for OpenDNSSEC
net-dns/opendnssec:softhsm - Enables support for storing DNSSEC keys in a dev-libs/softhsm PKCS#11 object
net-dns/pdns:botan - Make it possible to use the dev-libs/botan library for crypto-related stuff (like DNSSec) which can be significantly faster than PolarSSL.
net-dns/pdns:luajit - Enable support for dev-lang/luajit
net-dns/pdns:mydns - Making it possible to use a MyDNS MySQL database with PowerDNS (not recommended for new deployments).
net-dns/pdns:opendbx - Use a database supported by dev-db/opendbx as backend.
net-dns/pdns:protobuf - Enable support for dev-libs/protobuf.
net-dns/pdns:remote - Use a generic socket or pipe as a backend (via JSON RPC requests).
net-dns/pdns:tinydns - Use a TinyDNS CDB database as backend.
net-dns/pdns:tools - Build optional tools (dnsscan, dnsscope, etc..).
net-dns/pdns-recursor:luajit - Enable support for dev-lang/luajit.
net-dns/pdns-recursor:protobuf - Enable support for dev-libs/protobuf.
net-dns/pdnsd:isdn - Linux-only: check status of ippp interfaces with ISDN-specific system calls.
net-dns/pdnsd:urandom - Linux-only: use /dev/urandom (pseudo-random number generation) instead of the default use of random() PRNG.
net-dns/resolvconf-symlink:symlink - Actually replace /etc/resolv.conf with a symlink. Without this flag, the ebuild is a no-op.
net-dns/unbound:dnscrypt - Enable DNSCrypt support
net-dns/unbound:dnstap - Enable dnstap support
net-dns/unbound:ecdsa - Enable ECDSA support
net-dns/unbound:gost - Enable GOST support
net-firewall/arno-iptables-firewall:plugins - Install optional plugins
net-firewall/ebtables:perl - Install the ebtables-save script which uses perl
net-firewall/firehol:ipset - Use net-firewall/ipset.
net-firewall/firewalld:gui - Builds and installs GUI configurator and GTK+ applet
net-firewall/fwknop:client - Build fwknop client
net-firewall/fwknop:extras - Install utility scripts and AppArmor policy for fwknopd
net-firewall/fwknop:firewalld - Use net-firewall/firewalld as the default server backend
net-firewall/fwknop:gdbm - Use sys-libs/gdbm to store fwknopd digest cache
net-firewall/fwknop:gpg - Enable GPG support via app-crypt/gpgme
net-firewall/fwknop:iptables - Use net-firewall/iptables as the default server backend
net-firewall/fwknop:nfqueue - Enable UDP-only NFQUEUE server mode (no net-libs/libpcap dependency)
net-firewall/fwknop:server - Build fwknopd server
net-firewall/fwknop:udp-server - Enable UDP-only server mode (no net-libs/libpcap dependency)
net-firewall/iptables:conntrack - Build against net-libs/libnetfilter_conntrack when enables the connlabel matcher
net-firewall/iptables:netlink - Build against libnfnetlink which enables the nfnl_osf util
net-firewall/iptables:nftables - Support nftables kernel interface
net-firewall/iptables:pcap - Build against net-libs/libpcap which enables the nfbpf_compile util
net-firewall/nufw:nfconntrack - Use netfilter_conntrack
net-firewall/nufw:nfqueue - Use NFQUEUE instead of QUEUE
net-firewall/nufw:pam_nuauth - Add support for pam nufw from PAM
net-firewall/nufw:plaintext - Add support for authentication with plaintext files
net-firewall/pftop:altq - Enable altq(4) support — alternate queuing of network packets.
net-firewall/pglinux:cron - Install cron script
net-firewall/pglinux:logrotate - Install logrotate.d file
net-firewall/shorewall:init - Adds the capability to place the firewall in a safe state prior to bringing up the network interfaces
net-firewall/shorewall:ipv4 - Installs everything needed to create a full IPv4 firewall
net-firewall/shorewall:ipv6 - Adds the capability to create a full IPv6 firewall (requires net-firewall/shorewall ipv4 USE flag)
net-firewall/shorewall:lite4 - Installs everything needed to just *run* an IPv4 compiled firewall script created with net-firewall/shorewall ipv4 USE flag
net-firewall/shorewall:lite6 - Installs everything needed to just *run* an IPv6 compiled firewall script created with net-firewall/shorewall ipv6 USE flag
net-firewall/ufw-frontends:kde - Use kdesu to gain root privileges (note: the flag has lower priority than "policykit")
net-firewall/ufw-frontends:policykit - Use pkexec to gain root privileges
net-fs/autofs:dmalloc - Enable debugging with the dmalloc library
net-fs/autofs:hesiod - Install hesiod module
net-fs/autofs:ldap - Install LDAP module
net-fs/autofs:libtirpc - Use TiRPC library instead of SunRPC
net-fs/autofs:mount-locking - Enable locking to prevent corruption of /etc/mtab in the presence of concurrent auto-mounting. If enabled, recursive auto-mounting (eg. using autofs to bind or loop mount a filesystem which is itself auto-mounted) is not possible.
net-fs/autofs:sasl - Enable SASL support in the LDAP module
net-fs/cifs-utils:ads - Enable Active Directory support and create cifs.idmap binary - idmap support
net-fs/cifs-utils:caps - libcap support
net-fs/cifs-utils:caps-ng - libcap-ng support
net-fs/cifs-utils:creds - cifs credentials support
net-fs/cvmfs:aufs - Use AUFS instead of OverlayFS for the server
net-fs/cvmfs:client - Install the cvmfs client programs and init script
net-fs/cvmfs:server - Install the cvmfsd program and init script
net-fs/cvmfs:test-programs - Install unit test programs
net-fs/netatalk:pgp - Add support pgp authentication module
net-fs/netatalk:quota - Add support for user quota on various filesystems.
net-fs/netatalk:shadow - Add shadow support
net-fs/netatalk:ssl - Use dev-libs/openssl to provide DHX User Access Modules. These are not used with most recent versions of OS X and can be kept disabled without risks.
net-fs/netatalk:tracker - Add support for spotlight like tracker
net-fs/netatalk:utils - Install afpstats script
net-fs/nfs-utils:libmount - Link mount.nfs with libmount
net-fs/nfs-utils:nfsdcld - Enable nfsdcld NFSv4 clientid tracking daemon
net-fs/nfs-utils:nfsidmap - Enable support for newer nfsidmap helper
net-fs/nfs-utils:nfsv4 - Enable support for NFSv4
net-fs/nfs-utils:nfsv41 - Enable support for NFSv4.1
net-fs/nfs-utils:uuid - Support UUID lookups in rpc.mountd
net-fs/openafs:bitmap-later - Enable fast startup of file server by not reading bitmap till needed.
net-fs/openafs:fuse - Build fuse client.
net-fs/openafs:modules - Build libafs kernel module. Disable only if you know what you're doing: without this module OpenAFS client will not work.
net-fs/openafs:pthreaded-ubik - Enable installation of pthreaded ubik applications.
net-fs/openafs:supergroups - Enable support for nested pts groups.
net-fs/s3fs:gnutls - Enable net-libs/gnutls crypto backend
net-fs/s3fs:nettle - Use dev-libs/nettle network functions with GnuTLS.
net-fs/s3fs:nss - Enable dev-libs/nss crypto backend
net-fs/s3fs:openssl - Enable dev-libs/openssl crypto backend
net-fs/s3ql:contrib - Install additional contributed scripts
net-fs/samba:addc - Enable Active Directory Domain Controller support
net-fs/samba:addns - Enable AD DNS integration
net-fs/samba:ads - Enable Active Directory support
net-fs/samba:aio - Enable asynchronous IO support
net-fs/samba:client - Enables the client part
net-fs/samba:cluster - Enable support for clustering
net-fs/samba:dmapi - Enable support for DMAPI. This currently works only in combination with XFS.
net-fs/samba:gpg - Use app-crypt/gpgme for AD DC
net-fs/samba:iprint - Enabling iPrint technology by Novell
net-fs/samba:quota - Enables support for user quotas
net-fs/samba:system-heimdal - Use app-crypt/heimdal instead of bundled heimdal.
net-fs/samba:system-mitkrb5 - Use app-crypt/mit-krb5 instead of app-crypt/heimdal.
net-fs/samba:winbind - Enables support for the winbind auth daemon
net-fs/smbnetfs:gnome - Use the gnome-base/gnome-keyring for password management.
net-fs/unfs3:cluster - Enable ClusterNFS file naming extensions
net-ftp/frox:transparent - Enable transparent proxying of data connections
net-ftp/lftp:convert-mozilla-cookies - Install the convert-mozilla-cookies script and its run-time dependencies
net-ftp/lftp:verify-file - Install the verify-file script and its run-time dependencies
net-ftp/proftpd:authfile - Enable support for the auth-file module
net-ftp/proftpd:ban - Enable support for the mod_ban module
net-ftp/proftpd:case - Enable support for the mod_case module
net-ftp/proftpd:copy - Enable support for the mod_copy module
net-ftp/proftpd:ctrls - Enable support for the mod_ctrls and mod_ctrls_admin modules
net-ftp/proftpd:deflate - Enable support for the mod_deflate module
net-ftp/proftpd:diskuse - Enable support for the mod_diskuse module
net-ftp/proftpd:dso - Enable support for the mod_dso module
net-ftp/proftpd:dynmasq - Enable support for the mod_dynmasq module, for dynamically updating MasqueradeAddress for dyndns-like scenarios)
net-ftp/proftpd:exec - Enable support for the mod_exec module. WARNING: this could be a security risk
net-ftp/proftpd:ident - Enable support for the mod_ident module
net-ftp/proftpd:ifsession - Enable support for the ifsession module
net-ftp/proftpd:ifversion - Enable support for the mod_ifversion module
net-ftp/proftpd:linguas_bg_BG - Language support for bg_BG
net-ftp/proftpd:linguas_fr_FR - Language support for fr_FR
net-ftp/proftpd:linguas_it_IT - Language support for it_IT
net-ftp/proftpd:linguas_ja_JP - Language support for ja_JP
net-ftp/proftpd:linguas_ru_RU - Language support for ru_RU
net-ftp/proftpd:log_forensic - Enable support for the mod_log_forensic module, log only suspicious actions.
net-ftp/proftpd:memcache - Enable support for the mod_memcache module, for using memcached servers
net-ftp/proftpd:msg - Enable support for the mod_msg module, allows system users to send messages to connected clients via the ftpdctl program.
net-ftp/proftpd:qos - Enable support for the mod_qos module
net-ftp/proftpd:ratio - Enable support for the mod_ratio module
net-ftp/proftpd:readme - Enable support for the mod_readme module
net-ftp/proftpd:rewrite - Enable support for the rewrite module
net-ftp/proftpd:sftp - Enable support for the mod_sftp module and optionally mod_sftp_sql and mod_sftp_pam if matching USE flags are enabled
net-ftp/proftpd:shaper - Enable support for the mod_shaper module
net-ftp/proftpd:sitemisc - Enable support for the sitemisc module
net-ftp/proftpd:softquota - Enable support for the quotatab module
net-ftp/proftpd:trace - Build with trace support. Should not be enabled on production servers
net-ftp/proftpd:unique_id - Enable support for the mod_unique_id module, every connection gets unique ID.
net-ftp/proftpd:vroot - Enable support for the virtual root module
net-ftp/pure-ftpd:anondel - Permit anonymous to delete files
net-ftp/pure-ftpd:anonperm - Permit anonymous to change file permissions
net-ftp/pure-ftpd:anonren - Permit anonymous to rename files
net-ftp/pure-ftpd:anonres - Permit anonymous to resume file transfers
net-ftp/pure-ftpd:charconv - Enables charset conversion
net-ftp/pure-ftpd:implicittls - Enable TLS on Port 990
net-ftp/pure-ftpd:noiplog - Disables logging of IP addresses
net-ftp/pure-ftpd:paranoidmsg - Display paranoid messages instead of normal ones
net-ftp/pure-ftpd:resolveids - Resolve UIDs/GIDs
net-ftp/pure-ftpd:sysquota - Enables system quota support (needs sys-fs/quota)
net-ftp/pure-ftpd:vchroot - Enable support for virtual chroot (possible security risk)
net-ftp/yafc:ssh - Build with SFTP support
net-im/ayttm:irc - Enable Internet Relay Chat support
net-im/ayttm:lj - Enable livejournal.com support
net-im/ayttm:smtp - Adds support for sending messages via RFC2821 SMTP
net-im/bitlbee:libevent - Use libevent for event handling
net-im/bitlbee:nss - Use NSS for SSL support in MSN and Jabber
net-im/bitlbee:otr - Enable support for encrypted conversations
net-im/bitlbee:plugins - Enable support for plugins
net-im/bitlbee:purple - Use libpurple instead of the built-in IM protocol support
net-im/bitlbee:twitter - Enable Twitter protocol support
net-im/centerim:gadu - Enable support for the Gadu-Gadu protocol
net-im/centerim:irc - Enable support for the IRC protocol
net-im/centerim:lj - Enable support for the LiveJournal weblog system
net-im/centerim:otr - Enable encrypted conversations
net-im/choqok:attica - Build Open Collaboration Services plugin using dev-libs/libattica
net-im/choqok:konqueror - Build Konqueror Choqok plugin
net-im/choqok:telepathy - Enable support for the real-time communication framework telepathy
net-im/climm:otr - Enable encrypted conversations
net-im/corebird:glade - Install glade catalogs for corebird
net-im/corebird:spellcheck - Support spell checking
net-im/coturn:mongodb - Enable support for the mongodb database
net-im/coturn:redis - Enable support for the redis database
net-im/ejabberd:captcha - Support for CAPTCHA Forms (XEP-158) on registration
net-im/ejabberd:full-xml - Use XML features in XMPP stream (ex: CDATA), requires XML compliant clients
net-im/ejabberd:hipe - Compile natively with HiPE, not recommended
net-im/ejabberd:mssql - Enable Microsoft SQL Server support (via ODBC) for data storage
net-im/ejabberd:mysql - Enable MySQL support for data storage
net-im/ejabberd:nls - Enable character set conversion for mod_irc
net-im/ejabberd:odbc - Enable ODBC support to access data storage
net-im/ejabberd:postgres - Enable PostgreSQL support for data storage
net-im/ejabberd:redis - Enable Redis support for transient data
net-im/ejabberd:riak - Enable support for Riak - distributed NoSQL key-value data store
net-im/ejabberd:roster-gw - Turn on workaround for processing gateway subscriptions
net-im/ejabberd:sqlite - Enable SQLite database support
net-im/ejabberd:zlib - Enable Stream Compression (XEP-0138) using zlib
net-im/ekg2:gadu - Enable Gadu-Gadu protocol support (requires net-libs/libgadu).
net-im/ekg2:gif - GIF token support for Gadu-Gadu protocol.
net-im/ekg2:gnutls - Enable SSL/TLS support through GnuTLS for the plugins supporting it. If 'ssl' is enabled too, GnuTLS will be preferred where possible (and OpenSSL will be used elsewhere).
net-im/ekg2:gpg - Enable jabber message encryption through app-crypt/gpgme.
net-im/ekg2:jpeg - JPEG token support for Gadu-Gadu protocol.
net-im/ekg2:minimal - Disable building extra plugins with no additional deps.
net-im/ekg2:openssl - Support encryption in sim plugin, using OpenSSL.
net-im/ekg2:oracle - Support logging messages into Oracle database.
net-im/ekg2:sqlite - Support logging messages into SQLite3 database.
net-im/ekg2:ssl - Enable the complete SSL/TLS support through OpenSSL. This also enables the 'sim' plugin which relies on OpenSSL.
net-im/empathy:gnome-online-accounts - Enable using net-libs/gnome-online-accounts for authorization (e.g. for Google Talk)
net-im/empathy:map - Enable world map support through media-libs/libchamplain
net-im/err:irc - Pull optional dependencies, needed for IRC backend
net-im/err:plugins - Enable support for installing plugins with dev-vcs/git
net-im/gajim:idle - Enable idle module
net-im/gajim:srv - SRV capabilities
net-im/gajim:xhtml - Enable XHTML support
net-im/jabberd2:experimental - Enable experimental features such as TLS Everywhere.
net-im/jabberd2:memdebug - Enable nad and pool debug. Requires USE="debug" to be set.
net-im/jabberd2:websocket - Enable WebSocket support on C2S port.
net-im/kadu:gadu - Enables Gadu communication protocol
net-im/kadu:mpd - Enables Music Player Daemon support
net-im/kadu:otr - Enable char encryption via OTR library
net-im/kadu:phonon - Enables phonon audio plugin
net-im/kadu:sdk - Install Kadu SDK (cmake module, API headers)
net-im/kadu:speech - Enables speech module
net-im/mcabber:aspell - Adds support for app-text/aspell spell checker.
net-im/mcabber:otr - Enable encrypted conversations using Off-The-Records messaging
net-im/pidgin:gadu - Enable Gadu Gadu protocol support
net-im/pidgin:groupwise - Enable Novell Groupwise protocol support
net-im/pidgin:gstreamer - Enables voice and video sessions
net-im/pidgin:gtk - Builds Pidgin, the GTK+ interface
net-im/pidgin:meanwhile - Enable meanwhile support for Sametime protocol
net-im/pidgin:ncurses - Build finch, console interface
net-im/pidgin:prediction - Enable Contact Availability Prediction plugin
net-im/pidgin:python - Build libgnt (GLib Ncurses Toolkit used by finch) with python scripting support
net-im/pidgin:silc - Enable SILC protocol support
net-im/pidgin:xscreensaver - Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
net-im/pidgin:zephyr - Enable Zephyr protocol support
net-im/prosody:jit - Use LuaJIT instead of vanilla Lua
net-im/prosody:libevent - Use libevent for event handling
net-im/prosody:zlib - Support for compressing XMPP streams with mod_compression
net-im/psi:enchant - Use enchant spell engine instead of aspell
net-im/psi:extras - Enables extra non official patches
net-im/psi:iconsets - Install additional iconsets, some of them has not clear licensing
net-im/psi:plugins - Enable plugins support
net-im/psi:powersave - Disable some non critical timers for much less CPU usage
net-im/psi:whiteboarding - Enable experimental interactive SVG drawing
net-im/psi:xscreensaver - Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
net-im/psimedia:demo - build simple test application for the PsiMedia system
net-im/pyaim-t:webinterface - Install dependencies needed for the web interface
net-im/pyicq-t:webinterface - Install dependencies needed for the web interface
net-im/qtox:X - Adds support for X11
net-im/qtox:gtk - Adds support for GTK and Status Notifier tray backends
net-im/qutim:antiboss - Enable support for the antiboss plugin
net-im/qutim:aspell - Enable spellchecking using app-text/aspell
net-im/qutim:awn - Enable integration with gnome-extra/avant-window-navigator
net-im/qutim:crypt - Enable AES crypto plugin
net-im/qutim:espionage - !!Not recomended, contains privacy risk!! Enable control plugin that controls user by sending messages and roster to remote server
net-im/qutim:histman - Enable history importer plugin
net-im/qutim:hunspell - Enable spellchecking using app-text/hunspell
net-im/qutim:irc - Enable IRC protocol support
net-im/qutim:mobility - Enable several mobility related plugins like vibro notification
net-im/qutim:mrim - Enable mail.ru protocol support
net-im/qutim:otr - Enable plugin for encrypted conversations (Off-The-Record messaging)
net-im/qutim:phonon - Add sound support via media-libs/phonon or dev-qt/qtphonon
net-im/qutim:plugman - Enable downloadable content management with dev-libs/libattica
net-im/qutim:purple - Enable libpurple-based protocol support
net-im/qutim:qml - Enable QtQuick-based chat plugin
net-im/qutim:sdl - Add sound support via media-libs/sdl-mixer
net-im/qutim:telepathy - Enable to connect various IMs through net-libs/telepathy-qt
net-im/qutim:tools - Enable some extra tools for qt developers
net-im/qutim:vkontakte - Enable vkontakte protocol support
net-im/qutim:webkit - Enable Adium-like WebView plugin
net-im/qutim:xscreensaver - Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
net-im/skype:apulse - Use media-sound/apulse for PulseAudio emulation
net-im/skype:pax_kernel - Triggers a paxmarking of the main skype binary
net-im/skypeforlinux:pax_kernel - Triggers a paxmarking of the main skype binary
net-im/telepathy-connection-managers:gadu - Enable Gadu Gadu protocol support.
net-im/telepathy-connection-managers:irc - Enable Internet Relay Chat (IRC) support.
net-im/telepathy-connection-managers:meanwhile - Enable meanwhile support for Sametime protocol.
net-im/telepathy-connection-managers:sip - Enable SIP/SIMPLE messaging and calling.
net-im/telepathy-connection-managers:sipe - Enable Sip Exchange Protocol.
net-im/telepathy-connection-managers:steam - Enable Steam Chat support.
net-im/telepathy-connection-managers:xmpp - Enable XMPP protocol handler (this is also Google Talk).
net-im/telepathy-connection-managers:yahoo - Enable Yahoo! messaging support.
net-im/telepathy-connection-managers:zeroconf - Enable Link-Local Messaging via the zeroconf or Bonjour protocol.
net-im/telepathy-mission-control:systemd - Rely on systemd's logind to detect suspend and resume
net-im/tkabber:plugins - Enables installation the extra plugins
net-im/toxic:av - Enables audio calling and/or audio notifications
net-im/toxic:notifications - Enables desktop notifications with libnotify
net-im/vacuum:adiummessagestyle - Use UI styles created for Adium
net-im/vacuum:annotations - Enable adding comments to the contacts in the roster
net-im/vacuum:aspell - Select app-text/aspell spell checker backend
net-im/vacuum:autostatus - Change the status in accordance with the time of inactivity
net-im/vacuum:avatars - Enable assigning and displaying avatars
net-im/vacuum:birthdayreminder - Reminds about birthdays of your friends
net-im/vacuum:bitsofbinary - Allow other modules to receive or send a small amount of binary data in XMPP stanza
net-im/vacuum:bookmarks - Enable creating bookmarks of the Jabber conferences and Web pages
net-im/vacuum:captchaforms - Perform tests for humanity outside of Web browser
net-im/vacuum:chatstates - Post user's activity to the chat
net-im/vacuum:clientinfo - Enable sending and receiving peer's application version, local time and last activity info
net-im/vacuum:commands - Enable performing special commands provided by various services
net-im/vacuum:compress - Compress stream of messages
net-im/vacuum:console - Enable inspecting a raw XML stream
net-im/vacuum:dataforms - Allow other modules to process and display data forms intended for the user
net-im/vacuum:datastreamsmanager - Enable initiating a custom data stream between two XMPP entities
net-im/vacuum:emoticons - Enable using smiley images in messages
net-im/vacuum:enchant - Select app-text/enchant spell checker backend
net-im/vacuum:filemessagearchive - Allows to save the history of conversations to local files
net-im/vacuum:filestreamsmanager - Enable transferring files between two XMPP entities
net-im/vacuum:filetransfer - Enable sending files to peers
net-im/vacuum:gateways - Simplify the interaction with gateways to other IM systems
net-im/vacuum:hunspell - Select app-text/hunspell spell checker backend
net-im/vacuum:inbandstreams - Enable initiating in-band data stream between two XMPP enitites
net-im/vacuum:iqauth - Enable logging on Jabber servers withous SASL authentication support
net-im/vacuum:jabbersearch - Enable searching contacts in Jabber networks
net-im/vacuum:messagearchiver - Enable saving the communication history both locally and on the server
net-im/vacuum:messagecarbons - Allows to keep all user IM clients engaged in a conversation
net-im/vacuum:multiuserchat - Enable Jabber multi-user conferences
net-im/vacuum:pepmanager - Allows other plugins to recieve and publish PEP events
net-im/vacuum:privacylists - Enable blocking the undesirable contacts
net-im/vacuum:privatestorage - Allow other modules to store arbitrary data on the server
net-im/vacuum:recentcontacts - Displays a recently used contacts
net-im/vacuum:registration - Enable creating accounts in Jabber services
net-im/vacuum:remotecontrol - Allows to remotely control the client
net-im/vacuum:rosteritemexchange - Allows to exchange contact list items
net-im/vacuum:rostersearch - Allows to search for contacts in the roster
net-im/vacuum:servermessagearchive - Allows to save the history of communications on the server
net-im/vacuum:servicediscovery - Enable receiving information about Jabber entities
net-im/vacuum:sessionnegotiation - Enable initiating the session between two entities with setting the rules for XMPP stanzas exchange
net-im/vacuum:shortcutmanager - Allows to setup user defined shortcuts
net-im/vacuum:socksstreams - Enable initiating SOCKS5 data streams between two XMPP entities
net-im/vacuum:urlprocessor - Allows other plugins to load data from custom types of URLs
net-im/vacuum:vcard - Enable obtaining peer's personal contact information
net-im/vacuum:xmppuriqueries - Allow other plugins to handle XMPP URI queries
net-irc/bip:freenode - Enables freenode-specific functionality. Currently that is only support for mute lists (MODE #channel +q).
net-irc/bip:noctcp - Disable the automatic CTCP VERSION reply which is often exploited by malicious people to cause a DoS (reconnect due to flooding).
net-irc/bip:oidentd - Enable oidentd support
net-irc/epic5:archive - Use app-arch/libarchive to use zip and tar archives from scripts.
net-irc/epic5:valgrind - Compile against dev-util/valgrind headers to improve memory-leak checking when running epic5 under valgrind.
net-irc/hexchat:libcanberra - Enable sound event support using media-libs/libcanberra
net-irc/hexchat:libproxy - Enable proxy support.
net-irc/hexchat:plugin-checksum - Build Checksum plugin (needs plugins)
net-irc/hexchat:plugin-fishlim - Build FiSHLiM plugin (needs plugins )
net-irc/hexchat:plugin-sysinfo - Build SysInfo plugin (needs plugins)
net-irc/hexchat:theme-manager - Build the theme manager (mono)
net-irc/inspircd:geoip - Add geoip support for country and city lookup based on IPs
net-irc/inspircd:gnutls - Enable TLS support
net-irc/inspircd:ipv6 - Enable support for IP version 6
net-irc/inspircd:ldap - Enable LDAP support
net-irc/inspircd:mysql - Enable MySQL database backend
net-irc/inspircd:pcre - Adds support for Perl Compatible Regular Expressions
net-irc/inspircd:posix - Adds support for POSIX-compatible functions
net-irc/inspircd:postgres - Enable PostgreSQL database backend
net-irc/inspircd:sqlite - Enable Sqlite database backend
net-irc/inspircd:ssl - Enable SSL support
net-irc/inspircd:tre - Enable support for TRE, a lightweight, robust, and efficient POSIX compliant regexp matching library
net-irc/iroffer-dinoex:admin - Compile with HTTP Admin
net-irc/iroffer-dinoex:blowfish - Compile with blowfish encryption support
net-irc/iroffer-dinoex:chroot - Compile with chroot support
net-irc/iroffer-dinoex:http - Compile with HTTP server support
net-irc/iroffer-dinoex:kqueue - Compile with kqueue() support
net-irc/iroffer-dinoex:memsave - Compile with memory protection
net-irc/iroffer-dinoex:telnet - Compile with Telnet server support
net-irc/irssi:proxy - Adds support for a loadable IRC proxy module
net-irc/kvirc:dcc_video - Support video connections over DCC protocol
net-irc/kvirc:phonon - Support Phonon for audio output
net-irc/limnoria:crypt - Enables user authentication with GPG
net-irc/ngircd:ident - Enables support for net-libs/libident
net-irc/psybnc:multinetwork - Adds support for multiple networks
net-irc/psybnc:oidentd - Adds support for oidentd
net-irc/psybnc:scripting - Adds scripting support
net-irc/quassel:X - Build the Qt5 GUI client for quassel. If this USE flag is disabled, the GUI is not built, and cannot be used. You might want to disable this on the server, but you need it enabled on the client.
net-irc/quassel:breeze - Support the Breeze and Breeze-Dark icon sets (default for Plasma 5).
net-irc/quassel:crypt - Support core->network per-channel and per-query blowfish encryption via app-crypt/qca SLOT 2.
net-irc/quassel:dbus - Support desktop notifications via the StatusNotifier D-Bus service (used by most modern desktop environments).
net-irc/quassel:monolithic - Build standalone client with integrated core, no external quasselcore needed. Only useful if you don't want to use Quassel's client/server model. The server and X flags are not needed in this case but it is possible to enable them too.
net-irc/quassel:oxygen - Support the Oxygen icon set that was the default for KDE4.
net-irc/quassel:phonon - Build client with phonon backend support. This enables sound playback in client.
net-irc/quassel:server - Build the server binary. If this USE flag is disabled, the 'core' server binary for quassel is not built, and cannot be used. You need this enabled on the server, but you might want to disable it on the client.
net-irc/quassel:snorenotify - Support for Snore notification framework.
net-irc/quassel:urlpreview - Use QtWebEngine rendering engine for showing URL thumbnails.
net-irc/rbot:aspell - Use aspell instead of ispell in the "spell" plugin for rbot. The vanilla plugin uses ispell, but enabling this flag makes it use the ispell interface from aspell instead.
net-irc/rbot:cal - Add dependency over a package providing the /usr/bin/cal command, which is needed to enable the "cal" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:figlet - Add dependency over app-misc/figlet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use figlet; if toilet is also disabled, the plugin will be disabled.
net-irc/rbot:fortune - Add dependency over games-misc/fortune-mod, which is needed to enable the "fortune" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:host - Add dependency over net-dns/bind-tools (providing /usr/bin/host), which is needed to enable the "host" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:nls - Build and install translation for the messages coming from the bot and its plugins (through dev-ruby/ruby-gettext).
net-irc/rbot:shorturl - Add dependency over dev-ruby/shorturl, which is needed to enable the "shortenurl" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:timezone - Add dependency over dev-ruby/tzinfo to enable the "time" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:toilet - Add dependency over app-misc/toilet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use toilet; if figlet is also disabled, the plugin will be disabled.
net-irc/rbot:translator - Add dependency over dev-ruby/mechanize, which is needed to enable the "translator" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/shadowircd:largenet - Enable support/tweaks for large networks
net-irc/unrealircd:class-nofakelag - Enable an unsupported class::options flag called “nofakelag” allowing you to grant fakelag exemption to normal user (instead of just opers).
net-irc/unrealircd:extban-stacking - Enable extended channel bans (such as +b ~c: and +b ~n:) to contain other extended bans instead of just hostmasks.
net-irc/unrealircd:operoverride - Enable OperOverride extension
net-irc/unrealircd:operoverride-verify - Enable requiring opers to invite themselves to +s/+p channels
net-irc/unrealircd:prefixaq - Enable chanadmin and chanowner prefixes
net-irc/unrealircd:showlistmodes - Display channel modes in /LIST (only configured at compiletime)
net-irc/unrealircd:shunnotices - Enable notifying a user when un-shunned
net-irc/unrealircd:topicisnuhost - Enable displaying nick!user@host as topic setter
net-irc/unrealircd:usermod - Enable /set* and /chg* commands
net-irc/weechat:alias - Enable plugin for alias control.
net-irc/weechat:buflist - Enable buflist plugin.
net-irc/weechat:charset - Enable encoding conversions.
net-irc/weechat:exec - Enable exec plugin.
net-irc/weechat:fifo - Enable FIFO support (sh pipes).
net-irc/weechat:irc - Enable IRC protocol support.
net-irc/weechat:logger - Enable support for logging.
net-irc/weechat:relay - Enable relay plugin (experimental)
net-irc/weechat:scripts - Build infrastructure for scripting.
net-irc/weechat:trigger - Enable trigger plugin.
net-irc/weechat:xfer - Enable xfer plugin support.
net-irc/znc:daemon - Allow znc to run as a system-wide service. Installs an init script and creates a znc user:group.
net-irc/znc:zlib - Enable mod_deflate-like gzip support for znc's web interface using sys-libs/zlib.
net-libs/aqbanking:chipcard - Enable support for DDV/RSA-chipcards
net-libs/aqbanking:ebics - Enable support for Electronic Banking Internet Communication Standard (EBICS)
net-libs/axtls:cgi-lua - Enables lua backed cgi for axhttpd server
net-libs/axtls:cgi-php - Enables php backed cgi for axhttpd server
net-libs/axtls:httpd - Enables axhttpd web server component
net-libs/axtls:static - Statically build axhttpd server
net-libs/c-client:chappa - Enable Eduardo Chappa's patches for use with mail-client/alpine (mainly adds support for maildir)
net-libs/c-client:doc - Install RFCs related to IMAP
net-libs/c-client:topal - Enable support for net-mail/topal for use with mail-client/alpine
net-libs/courier-authlib:vpopmail - Enable vpopmail support
net-libs/cvm:vpopmail - Enable vpopmail support
net-libs/glib-networking:gnome - Extract HTTP/HTTPS/SOCKS proxy configuration stored using GSettings
net-libs/glib-networking:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration
net-libs/gnome-online-accounts:gnome - Use gnome-base/gnome-control-center to set GNOME online accounts preferences
net-libs/gnutls:crywrap - Build the crywrap TLS proxy service
net-libs/gnutls:dane - Build libgnutls-dane, implementing DNS-based Authentication of Named Entities. Requires net-dns/unbound
net-libs/gnutls:openpgp - Enable openpgp support
net-libs/gnutls:openssl - Build openssl compatibility libraries
net-libs/gnutls:pkcs11 - Add support for PKCS#11 through app-crypt/p11-kit
net-libs/gnutls:sslv2 - Support for the old/insecure SSLv2 protocol
net-libs/gnutls:sslv3 - Support for the old/insecure SSLv3 protocol
net-libs/gnutls:test-full - Enable full test mode
net-libs/gnutls:tls-heartbeat - Enable the Heartbeat Extension in TLS and DTLS
net-libs/gnutls:tools - Build extra tools
net-libs/gnutls:valgrind - Enable usage of dev-util/valgrind in debug
net-libs/gtk-vnc:gtk3 - Build the gtk3 gtk-vnc library and other gtk3 assets
net-libs/h323plus:aec - Enable acoustic echo cancellation
net-libs/h323plus:sound - Enable audio codecs
net-libs/h323plus:video - Enable video codecs
net-libs/iax:snomhack - Use slower memset for SNOM phoneem
net-libs/ldns:dane - Enable DNS-based Authentication of Named Entities (DANE) support
net-libs/ldns:ecdsa - Enable ECDSA support
net-libs/ldns:gost - Enable GOST support
net-libs/libbtbb:extras - Install pcapdump and btaptap tools
net-libs/libbtbb:pcap - Add support for network packet capture via net-libs/libpcap
net-libs/libbtbb:wireshark-plugins - Build the wireshark plugins for bluetooth baseband sniffing
net-libs/libeXosip:srv - enable support for SRV records DNS queries
net-libs/libesmtp:ntlm - Enable support for NTLM authentication
net-libs/libetpan:liblockfile - Enable support for liblockfile library
net-libs/libgsasl:gcrypt - Use dev-libs/libgcrypt for low-level crypto
net-libs/libgsasl:ntlm - Add support for Microsoft's NTLM mechanism using net-libs/libntlm
net-libs/libinfinity:server - Build and install the server binary including init.d/conf.d-scripts. Needed if you want to host an infinote server for gobby.
net-libs/libisds:openssl - Use dev-libs/openssl as crypto backend instead of app-crypt/gpgme and dev-libs/libgcrypt
net-libs/libmicrohttpd:epoll - use epoll() system call
net-libs/libmicrohttpd:messages - enable error messages
net-libs/libnftnl:json - Supports parsing of JSON
net-libs/libnids:glib - Use dev-libs/glib for multiprocessing support
net-libs/libnids:libnet - Include code requiring net-libs/libnet
net-libs/liboauth:bindist - Alias for the nss USE flag, since there are license compliancy trouble when using OpenSSL.
net-libs/liboauth:curl - If enabled, net-misc/curl is used thorugh the libcurl library; if it's not, the curl command is used instead. Some features are only available when using the library, but using it as library requires matching SSL implementations.
net-libs/liboauth:nss - Use Mozilla NSS (dev-libs/nss) as hash library; if this is disabled, dev-libs/openssl is used instead.
net-libs/liboping:filecaps - Allow non-root users to use [n]oping utility.
net-libs/liboping:ncurses - Build ncurses-based version of oping utility (requires sys-libs/ncurses)
net-libs/libosmocore:embedded - Build for embedded use and disable unsupported features
net-libs/libosmocore:pcsc-lite - Enable smartcard support with sys-apps/pcsc-lite
net-libs/libpcap:netlink - Use dev-libs/libnl to put wireless interfaces in monitor mode.
net-libs/libprotoident:tools - Build and install command-line tools
net-libs/libproxy:gnome - Enable support for reading proxy settings from GNOME
net-libs/libproxy:kde - Enable support for reading proxy settings from KDE
net-libs/libproxy:spidermonkey - Use libmozjs from dev-lang/spidermonkey for PAC parsing
net-libs/libproxy:webkit - Use libjavascriptcoregtk from net-libs/webkit-gtk for PAC parsing
net-libs/libqmi:mbim - Support QMI over Mobile Broadband Interface Model (MBIM)
net-libs/libsoup:gssapi - Enable GSSAPI support
net-libs/libsoup:samba - Use net-fs/samba for NTLM Single Sign-On
net-libs/libsrtp:aesicm - Use AES ICM cryptographic algorithm
net-libs/libsrtp:console - Use /dev/console instead of stdout for error messages
net-libs/libsrtp:openssl - Use OpenSSL crypto primitives
net-libs/libsrtp:syslog - Use syslog for error messages
net-libs/libssh:gcrypt - Prefer dev-libs/libgcrypt over dev-libs/openssl for encryption
net-libs/libssh:gssapi - Enable gssapi support
net-libs/libssh:pcap - Build with PCAP output support
net-libs/libssh:server - Build with SSH server support
net-libs/libssh:sftp - Build with SFTP support
net-libs/libssh:ssh1 - Build with SSH1 support
net-libs/libssh2:gcrypt - Use dev-libs/libgcrypt instead of dev-libs/openssl
net-libs/libtorrent-rasterbar:dht - Enable DHT (distributed hash table) support
net-libs/libtrace:numa - Use sys-process/numactl
net-libs/libupnp:reuseaddr - Allow clean restarts by binding the socket with SO_REUSEADDR.
net-libs/libvncserver:24bpp - enable 24bpp support
net-libs/libvncserver:gcrypt - enable support for gcrypt
net-libs/libwebsockets:access-log - Support generating Apache-compatible access logs
net-libs/libwebsockets:cgi - Include CGI (spawn process with network-connected stdin/out/err) APIs
net-libs/libwebsockets:client - The client part of the library and libwebsockets-test-client
net-libs/libwebsockets:generic-sessions - With the Generic Sessions plugin
net-libs/libwebsockets:http-proxy - Support for rewriting HTTP proxying
net-libs/libwebsockets:http2 - Support the HTTP/2 protocol
net-libs/libwebsockets:lejp - With the Lightweight JSON Parser
net-libs/libwebsockets:libev - Support event loops via dev-libs/libev
net-libs/libwebsockets:libuv - Support asynchronous I/O via dev-libs/libuv
net-libs/libwebsockets:server-status - Support json + jscript server monitoring
net-libs/libwebsockets:smtp - Provide SMTP support
net-libs/libwebsockets:sqlite3 - Require SQLITE3 support
net-libs/loudmouth:asyncns - Use net-libs/libasyncns for asynchronous name resolution.
net-libs/loudmouth:openssl - Enable dev-libs/openssl support instead of gnutls (which is the default).
net-libs/mbedtls:havege - Enable the HAVEGE random generator. Warning: the HAVEGE random generator is not suitable for virtualized environments
net-libs/mbedtls:programs - Build PolarSSL programs
net-libs/neon:libproxy - Add support for net-libs/libproxy
net-libs/neon:pkcs11 - Add support for PKCS#11 using dev-libs/pakchois
net-libs/nghttp2:hpack-tools - Install HPACK (header compression) helper tools
net-libs/nghttp2:jemalloc - Use dev-libs/jemalloc for memory allocation
net-libs/nghttp2:utils - Install nghttp, nghttpd and nghttpx
net-libs/nodejs:npm - Enable NPM package manager
net-libs/nodejs:snapshot - Enable snapshot creation for faster startup
net-libs/nodejs:systemtap - Enable SystemTAP/DTrace tracing
net-libs/ntirpc:gssapi - Include support for RPCSEC GSS
net-libs/ntirpc:rdma - Include support for RDMA RPC
net-libs/onion:boehm-gc - Add dev-libs/boehm-gc support for memory allocations.
net-libs/onion:libev - Use dev-libs/libev as thread poller instead of Linux's epoll.
net-libs/onion:libevent - Use dev-libs/libevent as thread poller instead of libev or Linux's epoll.
net-libs/onion:redis - Add support for redis sessions.
net-libs/opal:capi - Enable CAPI support
net-libs/opal:celt - Enable CELT ultra-low delay audio codec
net-libs/opal:dtmf - Enable DTMF encoding/decoding support
net-libs/opal:fax - Enable T.38 FAX protocol
net-libs/opal:h224 - Enable H.224 real time control protocol
net-libs/opal:h281 - Enable H.281 Far-End Camera Control protocol
net-libs/opal:h323 - Enable H.323 protocol
net-libs/opal:iax - Enable Inter-Asterisk eXchange protocol
net-libs/opal:ilbc - Enable iLBC (RFC 3951) speech codec
net-libs/opal:ivr - Enable Interactive Voice Response
net-libs/opal:ixj - Enable xJack cards support
net-libs/opal:lid - Enable Line Interface Device
net-libs/opal:plugins - Enable plugins support
net-libs/opal:sbc - Enable the Bluetooth low-complexity, SubBand Codec
net-libs/opal:sip - Enable Session Initiation Protocol
net-libs/opal:sipim - Enable SIP Instant Messages session
net-libs/opal:srtp - Enable Secure Real-time Transport Protocol
net-libs/opal:stats - Enable statistic reporting
net-libs/opal:swig - Use swig to generate bindings
net-libs/opal:video - Enable video support
net-libs/opal:vpb - Enable Voicetronics VPB card support
net-libs/opal:vxml - Enable VXML support
net-libs/opal:wav - Enable WAVFILE support
net-libs/opal:x264-static - Install x264 plugin statically linked with x264
net-libs/ortp:ntp-timestamp - Turn on NTP timestamping on received packet
net-libs/ortp:srtp - Add support for Secure RTP
net-libs/phodav:spice - Install the spice-webdavd guest agent
net-libs/pjproject:amr - Inlcude AMR codec in the build
net-libs/pjproject:epoll - Use /dev/epoll ioqueue on Linux (experimental)
net-libs/pjproject:g711 - Include G.711 codecs in the build
net-libs/pjproject:g722 - Include G.722 codec in the build
net-libs/pjproject:g7221 - Include G.722.1 codec in the build
net-libs/pjproject:ilbc - Include iLBC codec in the build
net-libs/pjproject:l16 - Include Linear/L16 codec family in the build
net-libs/pjproject:libyuv - Include libyuv in the build
net-libs/pjproject:openh264 - Include Open H.264 support in the build
net-libs/pjproject:opus - Include OPUS support in the build
net-libs/pjproject:resample - Include resampling implementations in the build
net-libs/pjproject:silk - Include SILK support in the build
net-libs/pjproject:v4l2 - Include Video4Linux v2 support in the build
net-libs/pjproject:webrtc - Enable WebRTC support
net-libs/polarssl:havege - Enable the HAVEGE random generator. Warning: the HAVEGE random generator is not suitable for virtualized environments
net-libs/polarssl:programs - Build PolarSSL programs
net-libs/ptlib:asn - Enable ASN decoding/encoding support
net-libs/ptlib:dtmf - Enable DTMF encoding/decoding support
net-libs/ptlib:http - Enable HTTP support
net-libs/ptlib:mail - Enable mail protocols (POP3/SMTP)
net-libs/ptlib:qos - Enable QOS support
net-libs/ptlib:remote - Enable remote connection support
net-libs/ptlib:serial - Enable serial port support
net-libs/ptlib:shmvideo - Enable shared memory video devices
net-libs/ptlib:socks - Enable SOCKS protocol support
net-libs/ptlib:stun - Enable STUN support
net-libs/ptlib:telnet - Enable telnet protocol support
net-libs/ptlib:tts - Enable Text-To-Speech server support
net-libs/ptlib:video - Enable video support
net-libs/ptlib:vxml - Enable VoiceXML support
net-libs/ptlib:wav - Enable WAVFILE support
net-libs/qxmpp:opus - Enable Opus codec support via media-libs/opus
net-libs/qxmpp:vpx - Enable VP8 codec support via media-libs/libvpx
net-libs/rabbitmq-c:tools - Builds cli tools to interact with brokers
net-libs/shairplay:alac - Add support for Apple Lossless Audio Codec files
net-libs/shairplay:static-libs - Build static versions of dynamic libraries as well
net-libs/shairplay:tools - Build and install a binary shairplay in /usr/bin
net-libs/telepathy-qt:farstream - Enable support for audio/video calls via farstream
net-libs/tox:av - Adds support for audio and video.
net-libs/tox:daemon - Enable the DHT Bootstrap Daemon.
net-libs/tox:log-debug - Log level: 4
net-libs/tox:log-error - Log level: 1
net-libs/tox:log-info - Log level: 3
net-libs/tox:log-trace - Log level: 5
net-libs/tox:log-warn - Log level: 2
net-libs/tox:no-log - Log level: 0 (no debug info logged)
net-libs/tox:ntox - Enable the testing nTox client.
net-libs/udns:tools - Build and install dnsget, ex-rdns and rblcheck tools
net-libs/wandio:http - Build support for reading files over HTTP using net-misc/curl
net-libs/webkit-gtk:coverage - Enable code coverage support
net-libs/webkit-gtk:egl - Enable EGL support
net-libs/webkit-gtk:geoloc - Enable geolocation support through app-misc/geoclue
net-libs/webkit-gtk:geolocation - Enable geolocation support through app-misc/geoclue
net-libs/webkit-gtk:gles2 - Enable GLESv2 support
net-libs/webkit-gtk:webgl - Build support for the WebGL HTML API using virtual/opengl
net-libs/wvstreams:boost - Use dev-libs/boost to provide TR1-compatible functional interface. This USE flag is only needed with GCC earlier than version 4.1, or with other compilares not providing said interface.
net-libs/xrootd:fuse - Enable the sys-fs/fuse filesystem driver
net-libs/xrootd:http - Enable http protocol support
net-libs/xrootd:rbd - Enable rados block device support via sys-cluster/ceph
net-libs/zeromq:pgm - Build PGM (Pragmatic General Multicast)extention, a protocol for reliable multicast transport of data over IP networks.
net-libs/zeromq:sodium - Use dev-libs/libsodium for cryptography
net-mail/automx:memcached - Enable memcached support
net-mail/automx:sql - Enable support for SQL backends
net-mail/automx:tools - Install additional automx-test tool
net-mail/courier-imap:trashquota - include deleted messages, and the Trash folder, in the estimated quota usage for maildirs
net-mail/cyrus-imapd:backup - Enable backup service support
net-mail/cyrus-imapd:calalarm - Enable CalDAV alarm support
net-mail/cyrus-imapd:http - Enable http support
net-mail/cyrus-imapd:jmap - Enable JMAP support
net-mail/cyrus-imapd:lmdb - Enable support for using dev-db/lmdb
net-mail/cyrus-imapd:replication - Enable replication support
net-mail/cyrus-imapd:server - Enable building server binaries
net-mail/cyrus-imapd:sieve - Enable sieve support
net-mail/cyrus-imapd:sphinx - Enable Sphinx search engine support
net-mail/cyrus-imapd:xapian - Enable Xapian search engine support
net-mail/dbmail:sieve - Enable sieve filter support
net-mail/dovecot:cydir - Add cydir storage support
net-mail/dovecot:imapc - Add imap client storage support
net-mail/dovecot:lucene - Add lucene full text search (FTS) support using dev-cpp/clucene
net-mail/dovecot:lz4 - Add support for lz4 (de)compression
net-mail/dovecot:lzma - Add support for lzma (de)compression
net-mail/dovecot:managesieve - Add managesieve protocol support
net-mail/dovecot:mdbox - Add mdbox storage support
net-mail/dovecot:pop3c - Add pop3 client storage support
net-mail/dovecot:sdbox - Add sdbox storage support
net-mail/dovecot:sieve - Add sieve support
net-mail/dovecot:solr - Add solr full text search (FTS) support
net-mail/dovecot:textcat - Add libtextcat language guessing support for full text search (FTS)
net-mail/dovecot:vpopmail - Add vpopmail support
net-mail/fdm:courierauth - Add support for Courier authentication library
net-mail/fetchmail:hesiod - Enable support for hesiod
net-mail/fetchmail:socks - Enable support for socks proxy
net-mail/fetchmail:tk - Enable support for Tk GUI toolkit, in particular it installs fetchmailconf
net-mail/gnubiff:password - Enable save passwords to connect mail servers in user space
net-mail/hotwayd:smtp - Build SMTP proxy (hotsmtpd)
net-mail/isync:compat - Enable legacy utilities
net-mail/lbdb:abook - Enables app-misc/abook support
net-mail/lbdb:finger - Enables finger support
net-mail/libpst:dii - enable dii support
net-mail/mailutils:clients - Build client programs - frm maidag mail sieve messages readmsg dotlock movemail mimeview mh
net-mail/mailutils:kyotocabinet - Enable Kyoto Cabinet database support
net-mail/mailutils:servers - Build server programs - imap4d pop3d comsatd
net-mail/mailutils:tokyocabinet - Enable Tokyo Cabinet database support
net-mail/mairix:gnus - Add support for the marks propagation feature in GNUS (provided by app-editors/emacs or app-xemacs/gnus for XEmacs users)
net-mail/mpop:libsecret - Enable libsecret support to store login credentials
net-mail/mu:emacs - Install the mu4e mail client.
net-mail/mu:gui - Build and install the experimental gui 'mug'.
net-mail/notmuch:crypt - Support decryption and verification of PGP/MIME messages and in Emacs UI - encryption; support also S/MIME signature verification since version 0.22
net-mail/notmuch:doc - Install API documentation
net-mail/notmuch:emacs - Install Emacs UI (the main one)
net-mail/notmuch:mutt - Install helper script for Mutt
net-mail/notmuch:nmbug - Install experimental tag sharing / pseudo-bug-tracking script for Notmuch (see http://notmuchmail.org/nmbug/)
net-mail/notmuch:valgrind - Depend on dev-util/vagrind for test suite
net-mail/offlineimap:sqlite - Enable runtime support for sqlite mail status backend.
net-mail/qmailadmin:maildrop - Filter spam using maildrop
net-mail/qpopper:apop - Enables the pop.auth file in /etc/pop.auth
net-mail/qpopper:drac - Enables DRAC support
net-mail/qpopper:mailbox - Enables mail spool file is in home directory ~/Mailbox
net-mail/tpop3d:authexternal - Enable authentication by an external program
net-mail/tpop3d:drac - Enable dynamic relay support in the tpop3d pop3 server
net-mail/tpop3d:flatfile - Enable authentication against /etc/passwd-style flat files
net-mail/tpop3d:passwd - Enable /etc/passwd authentication
net-mail/tpop3d:sha1 - Use OpenSSL for sha1 encrypted passwords.
net-mail/tpop3d:shadow - Enable /etc/shadow authentication
net-mail/uw-imap:clearpasswd - Enables cleartext logins outside of SSL sessions
net-mail/vchkuser:debug - Enables debug messages to syslog
net-mail/vpopmail:clearpasswd - Enables cleartext password storage in the vpasswd files
net-mail/vpopmail:ipalias - Enables enable-ip-alias-domains
net-mail/vpopmail:maildrop - Enables mail-filter/maildrop support in vdelivermail
net-mail/vpopmail:spamassassin - Enables mail-filter/spamassassin support
net-misc/apt-cacher-ng:fuse - Install the sys-fs/fuse based acngfs, to use a userspace filesystem for the apt cache.
net-misc/aria2:bittorrent - Enable support for the bittorrent protocol.
net-misc/aria2:jemalloc - Use dev-libs/jemalloc to replace the malloc() implementation with a possibly faster one
net-misc/aria2:libuv - Use dev-libs/libuv backend.
net-misc/aria2:libxml2 - Use dev-libs/libxml2 for XML parsing (preferred) instead of dev-libs/expat.
net-misc/aria2:metalink - Enable support for metalink.
net-misc/aria2:nettle - Use dev-libs/nettle and dev-libs/gmp for bittorrent/metalink crypto instead of dev-libs/libgcrypt (when dev-libs/openssl is not being used).
net-misc/aria2:scripts - Install additional scripts which use aria2's xmlrpc functionality.
net-misc/aria2:ssh - Enable SFTP support.
net-misc/asterisk:cluster - Enable high-availability support through the Corosync Cluster Engine
net-misc/asterisk:dahdi - Support Digium compatible hardware (formerly known as Zaptel).
net-misc/asterisk:gtalk - Enable support for Google Talk services
net-misc/asterisk:http - Enable embedded web server
net-misc/asterisk:ilbc - Enable the Internet Low Bitrate Codec (iLBC)
net-misc/asterisk:newt - Include additional tools that require redhats windowing toolkit
net-misc/asterisk:osplookup - Support secure peering using the Open Settlement Protocol
net-misc/asterisk:pjproject - Enable support for pjproject (pjsip)
net-misc/asterisk:samples - Install sample sound and configuration files (default: on)
net-misc/asterisk:span - Enable support for the spandsp codec
net-misc/asterisk:srtp - Enable support for encrypted voice transmission (secure RTP)
net-misc/asterisk-core-sounds:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-core-sounds:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-core-sounds:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-core-sounds:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-core-sounds:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-core-sounds:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-core-sounds:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-core-sounds:wav - Install the sounds files for the wav codec.
net-misc/asterisk-extra-sounds:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-extra-sounds:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-extra-sounds:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-extra-sounds:gsm - Install the sounds files for the +gsm codec.
net-misc/asterisk-extra-sounds:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-extra-sounds:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-extra-sounds:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-extra-sounds:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-extra-sounds:wav - Install the sounds files for the wav codec.
net-misc/asterisk-moh-opsound:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-moh-opsound:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-moh-opsound:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-moh-opsound:gsm - Install the sounds files for the +gsm codec.
net-misc/asterisk-moh-opsound:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-moh-opsound:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-moh-opsound:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-moh-opsound:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-moh-opsound:wav - Install the sounds files for the wav codec.
net-misc/batman-adv:bla - B.A.T.M.A.N. bridge loop avoidance
net-misc/batman-adv:dat - B.A.T.M.A.N. distributed arp table
net-misc/batman-adv:mcast - B.A.T.M.A.N. multicast optimizations
net-misc/batman-adv:nc - B.A.T.M.A.N. network coding
net-misc/bfgminer:adl - Enable support for controlling fans and overclocking on AMD cards with AMD Display Library
net-misc/bfgminer:antminer - Enable support for mining with AntMiner U1 sticks
net-misc/bfgminer:avalon - Enable support for mining with Avalon 1 ASIC modules
net-misc/bfgminer:avalonmm - Enable support for mining with Avalon 2/3 ASIC modules
net-misc/bfgminer:bfsb - Enable support for mining on BFSB host Raspberry Pi
net-misc/bfgminer:bfx - Enable support for mining with BFx2 USB sticks
net-misc/bfgminer:bifury - Enable support for mining with Bi*fury USB sticks
net-misc/bfgminer:bigpic - Enable support for mining with Big Picture Mining USB sticks (Red/BlueFury, BF1, etc)
net-misc/bfgminer:bitforce - Enable support for mining with ButterFly Labs BitFORCE ASICs and/or FPGAs
net-misc/bfgminer:bitfury - Enable support for mining with 55nm Bitfury-based devices
net-misc/bfgminer:cointerra - Enable support for mining with CoinTerra TerraMiner.
net-misc/bfgminer:cpumining - Enable support for mining with CPUs
net-misc/bfgminer:drillbit - Enable support for mining with Drillbit boards
net-misc/bfgminer:dualminer - Enable support for mining with DualMiner USB sticks
net-misc/bfgminer:gridseed - Enable support for mining with 5-chip GridSeed orbs
net-misc/bfgminer:hashbuster - Enable support for mining with HashBuster nano boards
net-misc/bfgminer:hashbuster2 - Enable support for mining with HashBuster micro boards
net-misc/bfgminer:hashfast - Enable support for mining with HashFast devices
net-misc/bfgminer:icarus - Enable support for mining with Icarus-compatible devices (including Block Erupter Sapphire ASICs)
net-misc/bfgminer:jingtian - Enable support for mining on JingTian boards via SPI/GPIO
net-misc/bfgminer:keccak - Enable support for mining with Keccak miners
net-misc/bfgminer:klondike - Enable support for mining with Klondike USB miners
net-misc/bfgminer:libusb - Use libusb
net-misc/bfgminer:littlefury - Enable support for mining with LittleFury USB sticks
net-misc/bfgminer:metabank - Enable support for mining on Metabank host Raspberry Pi
net-misc/bfgminer:minion - Enable support for mining on minion chips via SPI (BlackArrow Prospero)
net-misc/bfgminer:modminer - Enable support for mining with ModMiner FPGAs
net-misc/bfgminer:nanofury - Enable support for mining with NanoFury USB sticks
net-misc/bfgminer:opencl - Enable support for mining with OpenCL-capable devices (GPUs)
net-misc/bfgminer:proxy - Enable support for virtual proxy device
net-misc/bfgminer:proxy_getwork - Enable proxy support for getwork protocol (often used with Block Erupter Blades)
net-misc/bfgminer:proxy_stratum - Enable proxy support for stratum protocol
net-misc/bfgminer:rockminer - Enable support for mining with RockMiner devices
net-misc/bfgminer:screen - Provide start-bfgminer.sh script to launch BFGMiner in app-misc/screen
net-misc/bfgminer:scrypt - Enable support for scrypt mining algorithm
net-misc/bfgminer:sha256d - Enable support for SHA256d mining algorithm
net-misc/bfgminer:twinfury - Enable support for mining with Twinfury USB sticks
net-misc/bfgminer:udev-broad-rules - Enable broader udev rules that may match non-mining devices
net-misc/bfgminer:x6500 - Enable support for mining with X6500 FPGAs
net-misc/bfgminer:zeusminer - Enable support for mining with ZeusMiner units
net-misc/bfgminer:ztex - Enable support for mining with Ztex FPGAs
net-misc/cfengine:html - Install HTML documentation
net-misc/cfengine:libvirt - Enable support for virtual machine management through app-emulation/libvirt
net-misc/cfengine:qdbm - Use dev-db/qdbm as database backend
net-misc/cfengine:tests - Install test files
net-misc/cfengine:tokyocabinet - Use dev-db/tokyocabinet as database backend
net-misc/cgminer:ants1 - Enable support for Antminer S1 Bitmain
net-misc/cgminer:ants2 - Enable support for Antminer S2 Bitmain
net-misc/cgminer:ants3 - Enable support for Antminer S3 Bitmain
net-misc/cgminer:avalon - Enable support for Avalon ASICs
net-misc/cgminer:avalon-miner - Enable support for Avalon miner ASICs
net-misc/cgminer:avalon2 - Enable support for Avalon2 ASICs
net-misc/cgminer:avalon4 - Enable support for Avalon4 ASICs
net-misc/cgminer:avalon7 - Enable support for Avalon7 ASICs
net-misc/cgminer:bab - Enable support for BlackArrow Bitfury
net-misc/cgminer:bflsc - Enable support for BFL ASICs
net-misc/cgminer:bitforce - Enable support for mining with ButterFly Labs BitFORCE FPGAs
net-misc/cgminer:bitfury - Enable support for mining with BitFury ASICs
net-misc/cgminer:bitmine_A1 - Enable support for mining with Bitmine.ch A1 ASICs
net-misc/cgminer:blockerupter - Enable support for mining with BlockRupter ASICs
net-misc/cgminer:cointerra - Enable support for mining with Cointerra ASICs
net-misc/cgminer:drillbit - Enable support for mining with Drillbit BitFury ASICs
net-misc/cgminer:hashfast - Enable support for mining with Hashfast
net-misc/cgminer:hashratio - Enable support for mining with Hashratio
net-misc/cgminer:icarus - Enable support for mining with Icarus FPGAs
net-misc/cgminer:klondike - Enable support for mining with Klondik ASICs
net-misc/cgminer:knc - Enable support for mining with KnC miners
net-misc/cgminer:minion - Enable support for mining with BlackArrow Bitfury
net-misc/cgminer:modminer - Enable support for mining with ModMiner FPGAs
net-misc/cgminer:sp10 - Enable support for Spondoolies SP10
net-misc/cgminer:sp30 - Enable support for Spondoolies SP30
net-misc/chrony:adns - Support for asynchronous DNS
net-misc/chrony:cmdmon - Support for command and monitoring
net-misc/chrony:html - Install HTML documentation
net-misc/chrony:ntp - Support for the Network Time Protocol (NTP)
net-misc/chrony:phc - Support for the PTP (Precision Time Protocol) Hardware Clock (PHC) interface
net-misc/chrony:pps - Support for the Linux Pulse Per Second (PPS) interface
net-misc/chrony:refclock - Support for reference clocks
net-misc/chrony:rtc - Support for the Linux Real Time Clock interface
net-misc/connman:ethernet - Enable ethernet support.
net-misc/connman:iptables - Use net-firewall/iptables as firewall.
net-misc/connman:l2tp - Use net-dialup/xl2tpd for L2TP VPN support.
net-misc/connman:nftables - Use net-firewall/nftables as firewall.
net-misc/connman:ofono - Use net-misc/ofono for telephony support.
net-misc/connman:openconnect - Use net-vpn/openconnect for VPN support.
net-misc/connman:openvpn - Use net-vpn/openvpn for openvpn support.
net-misc/connman:pptp - Use net-dialup/pptpclient for PPTP VPN support.
net-misc/connman:tools - Enable testing tools.
net-misc/connman:vpnc - Use net-vpn/vpnc for cisco VPN support.
net-misc/connman:wispr - Enable support for WISPr hotspot logins.
net-misc/connman-gtk:openconnect - Support easier authentication to AnyConnect VPNs
net-misc/csync:sftp - Enable sftp transfer support via net-libs/libssh
net-misc/curl:http2 - Enabled HTTP/2.0 support
net-misc/curl:metalink - Enable metalink support
net-misc/curl:rtmp - Enable RTMP Streaming Media support
net-misc/curl:ssh - Enabled SSH urls in curl using libssh2
net-misc/curl:ssl - Enable crypto engine support (via openssl if USE='-gnutls -nss')
net-misc/dahdi:flash - Support (short) flash on FXS
net-misc/dahdi-tools:ppp - Enables PPP/DAHDIRAS support
net-misc/dhcp:client - Install the dhclient program
net-misc/dhcp:server - Install the dhcpd and dhcrelay programs
net-misc/dhcpcd:embedded - Embed the definitions of dhcp options in the dhcpcd executable
net-misc/dhcpcd-ui:gtk3 - Add support for x11-libs/gtk+ (The GIMP Toolkit)
net-misc/directvnc:dmalloc - Enable debugging with the dmalloc library
net-misc/directvnc:mouse - Adds mouse support
net-misc/dropbear:bsdpty - Add support for legacy BSD pty's rather than dynamic UNIX pty's -- do not use this flag unless you are absolutely sure you actually want it
net-misc/dropbear:multicall - Build all the programs as one little binary (to save space)
net-misc/dropbear:shadow - Enable shadow password support
net-misc/dropbox:librsync-bundled - Use bundled librsync library
net-misc/electrum:audio_modem - Enable plugin to support Audio Modem
net-misc/electrum:cli - Enables the CLI interface
net-misc/electrum:cosign - Enable plugin to support multisig wallets between multiple Electrum clients
net-misc/electrum:digitalbitbox - Enable plugin to support Digital Bitbox hardware wallet
net-misc/electrum:email - Enable plugin to support emailing invoices
net-misc/electrum:greenaddress_it - Enable plugin to verify GreenAddress.it instant transactions
net-misc/electrum:qrcode - Enable QR code scanning with media-gfx/zbar
net-misc/electrum:sync - Enable plugin to sync wallet metadata across multiple Electrum clients
net-misc/electrum:trustedcoin_com - Enable plugin to use two-factor service by TrustedCoin.com
net-misc/electrum:vkb - Enable plugin for virtual keyboard
net-misc/eventd:libcanberra - Enable plugin for sounds via media-libs/libcanberra
net-misc/eventd:libnotify - Enable plugin to relay events to notification daemon (Note: not required for local notifications via net-misc/eventd)
net-misc/eventd:notification - Enable plugin to display on-screen notifications
net-misc/eventd:purple - Enable plugin for IM notifications via libpurple
net-misc/eventd:speech - Enable plugin for Text-To-Speech support
net-misc/eventd:websocket - Enable support for WebSocket protocol
net-misc/fatrat:bittorrent - Use the bittorrent protocol via net-libs/libtorrent-rasterbar.
net-misc/fatrat:webinterface - Enable builtin webinterface.
net-misc/freerdp:client - Build client binaries
net-misc/freerdp:openh264 - Enable H.264 support using media-libs/openh264
net-misc/freerdp:server - Build server binaries
net-misc/gerbera:curl - Support YouTube and external media sources (e.g. internet radio)
net-misc/gerbera:lastfm - Enable last.fm support
net-misc/gerbera:magic - Use libmagic to determine file types
net-misc/gerbera:mysql - Use dev-db/mysql as backend rather than SQLite3
net-misc/gerbera:taglib - Use media-libs/taglib for reading files' metadata rather than id3lib
net-misc/gnome-online-miners:flickr - Enable Flickr support
net-misc/gsasl:gcrypt - Use dev-libs/libgcrypt for low-level crypto
net-misc/gsasl:ntlm - Add support for Microsoft's NTLM mechanism using net-libs/libntlm
net-misc/guacamole-server:ssh - enable support for ssh connections
net-misc/guacamole-server:telnet - enable support for telnet connections
net-misc/gwget:epiphany - Build epiphany extensions
net-misc/hotot:chrome - Build chrome browser extension
net-misc/htbinit:esfq - Add support for Enhanced Stochastic Fairness queueing discipline.
net-misc/hylafaxplus:html - Convert faxes into html email
net-misc/hylafaxplus:jbig - JBIG Fax Compression Support
net-misc/hylafaxplus:mgetty - Receive faxes via serial port connections
net-misc/hylafaxplus:pam - hfaxd authentication via PAM
net-misc/icaclient:gstreamer010 - Enable audio support via media-libs/gstreamer using SLOT 0.10
net-misc/icecast:kate - Add karaoke and text encapsulation support for Ogg files
net-misc/icecast:logrotate - Install support files for app-admin/logrotate?
net-misc/icecast:yp - Build support for yp public directory listings
net-misc/iputils:SECURITY_HAZARD - Allow non-root users to flood (ping -f). This is generally a very bad idea.
net-misc/kafka-bin:internal-zookeeper - Use bundled local zookeeper instance
net-misc/kafkacat:json - Enable json support
net-misc/kea:openssl - Use dev-libs/openssl instead of Botan
net-misc/kea:samples - Install sample configuration files
net-misc/knock:server - Installs the knockd server daemon.
net-misc/lcr:asterisk - net-misc/asterisk channel driver
net-misc/lcr:gsm-bs - net-wireless/openbsc driver
net-misc/lcr:gsm-ms - net-wireless/osmobb driver
net-misc/lcr:gsmhr - Support for GSM HR codec using reference code (very slow)
net-misc/lcr:misdn - net-misc/misdn driver
net-misc/lcr:sip - SIP support
net-misc/lcr:ss5 - CCITT No. 5 support
net-misc/libteam:zmq - Build witch net-libs/zeromq support
net-misc/lldpd:cdp - Enable Cisco Discovery Protocol
net-misc/lldpd:dot1 - Enable Dot1 extension (VLAN stuff)
net-misc/lldpd:dot3 - Enable Dot3 extension (PHY stuff)
net-misc/lldpd:edp - Enable Extreme Discovery Protocol
net-misc/lldpd:fdp - Enable Foundry Discovery Protocol
net-misc/lldpd:graph - Create dot graphs in documentations
net-misc/lldpd:jansson - Enable JSON output via Jansson
net-misc/lldpd:lldpmed - Enable LLDP-MED extension
net-misc/lldpd:old-kernel - Enable compatibility with Linux kernel older than 2.6.39
net-misc/lldpd:sanitizers - Enable code instrumentation with selected sanitizers
net-misc/lldpd:snmp - Enable the use of SNMP
net-misc/lldpd:sonmp - Enable SynOptics Network Management
net-misc/mediatomb:curl - Support YouTube and external media sources (e.g. internet radio)
net-misc/mediatomb:flac - Enable FLAC metadata/artwork support
net-misc/mediatomb:id3tag - Use media-libs/libid3tag for reading files' metadata rather than taglib
net-misc/mediatomb:inotify - Enable inotify filesystem monitoring support
net-misc/mediatomb:lastfm - Enable last.fm support
net-misc/mediatomb:libextractor - Use libextractor to gather files' metadata
net-misc/mediatomb:magic - Use libmagic to determine file types
net-misc/mediatomb:mysql - Use dev-db/mysql as backend rather than SQLite3
net-misc/mediatomb:taglib - Use media-libs/taglib for reading files' metadata rather than id3lib
net-misc/mediatomb:thumbnail - Enables video thumbnails generation through media-video/ffmpegthumbnailer
net-misc/megatools:fuse - Enables support for the filesystem in userspace plugin through sys-fs/fuse.
net-misc/memcached:slabs-reassign - Allow manual reassignment of memory slabs at the cost of slab optimizations.
net-misc/minidlna:netgear - Enable netgear branding
net-misc/minidlna:readynas - Enable readynas branding
net-misc/miniupnpd:igd2 - Build for IGDv2 instead of an IGDv1
net-misc/miniupnpd:leasefile - Enable lease file.
net-misc/miniupnpd:pcp-peer - Enable support for PCP-PEER to allow NAT-PMP clients to mangle their packets.
net-misc/miniupnpd:portinuse - Check if a port is in use before allowing a NAT-PMP client to map it.
net-misc/miniupnpd:strict - Be more strict regarding compliance with UPnP specifications.
net-misc/modemmanager:mbim - Enable MBIM modem protocol
net-misc/modemmanager:qmi - Enable support for the QMI modem protocol used by devices with Qualcomm chipsets
net-misc/modemmanager:qmi-newest - Avoid deprecated QMI commands. Warning: may cause incompatibility with older devices.
net-misc/mosh:client - Build network client
net-misc/mosh:examples - Include example scripts
net-misc/mosh:mosh-hardening - Enable compiler and linker options to frustrate memory corruption exploits
net-misc/mosh:server - Build network server
net-misc/mosh:ufw - Install net-firewall/ufw rule set
net-misc/mosh:utempter - Include libutempter support
net-misc/mulk:checksum - Enable checksum verification for Metalink from dev-libs/openssl
net-misc/mulk:metalink - Enable support for media-libs/libmetalink
net-misc/ncp:diet - Compile against dev-libs/dietlibc
net-misc/networkmanager:connection-sharing - Use net-dns/dnsmasq and net-firewall/iptables for connection sharing
net-misc/networkmanager:consolekit - Use sys-auth/consolekit for session tracking
net-misc/networkmanager:dhclient - Use dhclient from net-misc/dhcp for getting ip
net-misc/networkmanager:dhcpcd - Use net-misc/dhcpcd for getting ip
net-misc/networkmanager:elogind - Use sys-auth/elogind for session tracking
net-misc/networkmanager:json - Enable JSON validation via dev-libs/jansson in libnm.
net-misc/networkmanager:modemmanager - Enable support for mobile broadband devices using net-misc/modemmanager
net-misc/networkmanager:nss - Use dev-libs/nss for cryptography
net-misc/networkmanager:ofono - Use net-misc/ofono for telephony support.
net-misc/networkmanager:ppp - Enable support for mobile broadband and PPPoE connections using net-dialup/ppp
net-misc/networkmanager:resolvconf - Use net-dns/openresolv for managing DNS information
net-misc/networkmanager:teamd - Enable Teamd control support
net-misc/networkmanager:wext - Enable support for the deprecated Wext (Wireless Extensions) API; needed for some older drivers (e.g. ipw2200, ndiswrapper)
net-misc/networkmanager:wifi - Enable support for wifi and 802.1x security using net-wireless/wpa_supplicant
net-misc/nextcloud-client:dolphin - Install the kde-apps/dolphin extension
net-misc/nextcloud-client:nautilus - Install the gnome-base/nautilus extension
net-misc/nextcloud-client:sftp - Enable sftp transfer support via net-libs/libssh
net-misc/nextcloud-client:shibboleth - Build support for Shibboleth single sign-on
net-misc/ntp:openntpd - Allow ntp to be installed alongside openntpd
net-misc/ntp:parse-clocks - Add support for PARSE clocks
net-misc/ntp:samba - Provide support for Samba's signing daemon (needed for Active Directory domain controllers)
net-misc/ocsync:sftp - Enable sftp transfer support via net-libs/libssh
net-misc/ofono:atmodem - ETSI AT modem support.
net-misc/ofono:bluetooth - Enable Bluetooth modem support using net-wireless/bluez.
net-misc/ofono:cdmamodem - Enable CDMA modem support.
net-misc/ofono:datafiles - Enable install configuration and data files.
net-misc/ofono:dundee - Enable BlueTooth DUN deamon support.
net-misc/ofono:isimodem - Enable PhoNet/ISI modem support.
net-misc/ofono:phonesim - Enable phone Simulator support
net-misc/ofono:provision - Enable GPRS provisioning support
net-misc/ofono:qmimodem - Enable Qualcomm QMI modem support
net-misc/ofono:tools - Enable testing tools
net-misc/oidentd:masquerade - Enable support for masqueraded/NAT connections
net-misc/olsrd:pud - Install the Node Position Update plugin
net-misc/openntpd:libressl - Enable HTTPS TLS time constraint support using dev-libs/libressl
net-misc/openssh:X509 - Adds support for X.509 certificate authentication
net-misc/openssh:bindist - Disable EC/RC5 algorithms in OpenSSL for patent reasons.
net-misc/openssh:hpn - Enable high performance ssh
net-misc/openssh:ldap - Add support for storing SSH public keys in LDAP
net-misc/openssh:ldns - Use LDNS for DNSSEC/SSHFP validation.
net-misc/openssh:livecd - Enable root password logins for live-cd environment.
net-misc/openssh:ssh1 - Support the legacy/weak SSH1 protocol
net-misc/openssh:ssl - Enable additional crypto algorithms via OpenSSL
net-misc/openvswitch:monitor - Build the Python and GUI dependent monitor applications
net-misc/owncloud-client:dolphin - Install the kde-apps/dolphin extension
net-misc/owncloud-client:nautilus - Install the gnome-base/nautilus extension
net-misc/owncloud-client:sftp - Enable sftp transfer support via net-libs/libssh
net-misc/owncloud-client:shibboleth - Build support for Shibboleth single sign-on
net-misc/pavuk:hammer - Turn on chunky/hammer mode (DoS) in pavuk: when specified, pavuk will include features to stress test web sites using an ultrahigh performancereplay mechanism
net-misc/plowshare:view-captcha - View captcha with aview
net-misc/ps3mediaserver:multiuser - Allow renderer customization per-user.
net-misc/ps3mediaserver:transcode - Install optional dependencies for transcoding support via media-video/mplayer
net-misc/ps3mediaserver:tsmuxer - Install optional dependencies for transcoding support via media-video/tsmuxer
net-misc/ptpd:debug - Enable debugging informations
net-misc/ptpd:experimental - Enable experimental features
net-misc/ptpd:ntp - Enable NTPD cooperation
net-misc/ptpd:pcap - Require net-libs/libpcap to allow layer 2 (raw Ethernet) transport
net-misc/ptpd:slave-only - Enable slave only operation (remove master mode functionality)
net-misc/ptpd:snmp - Require net-analyzer/net-snmp to enable SNMP configuration
net-misc/ptpd:statistics - Enable compution of statistics
net-misc/putty:gtk - Build the PuTTY client which requires x11-libs/gtk+:2. Otherwise only the CLI tools puttygen, plink, pscp and psftp will be built.
net-misc/quagga:bgpclassless - Apply unofficial patch to enable classless prefixes for BGP. Patch and information to be found at http://hasso.linux.ee/doku.php/english:network:quagga
net-misc/quagga:fpm - Enable Forwarding Plane Manager support
net-misc/quagga:multipath - Enable multipath routes support for any number of routes
net-misc/quagga:nhrpd - Build Next Hop Resolution Protocol daemon
net-misc/quagga:ospfapi - Enable OSPFAPI support for client applications accessing the OSPF link state database
net-misc/quagga:pam - Add support for PAM (via sys-libs/pam) to the Quagga Virtual Terminal Interface Shell (vtysh); if the readline USE flag is disabled, this flag is ignored
net-misc/quagga:protobuf - Enable support for dev-libs/protobuf
net-misc/quagga:readline - Enable support for sys-libs/readline to provide the Quagga Virtual Terminal Interface Shell (vtysh)
net-misc/quagga:tcp-zebra - Enable TCP zserv interface on port 2600 for Zebra/protocol-daemon communication. Unix domain sockets are chosen otherwise
net-misc/rancid-git:git - Enable git (version control system) support
net-misc/rdesktop:kerberos - Enable CredSPP support + Kerberos authentication with net-libs/libgssglue
net-misc/rdesktop:pcsc-lite - Enable smartcard support with sys-apps/pcsc-lite driver
net-misc/rdesktop:xrandr - Enable XRandR window extension support
net-misc/remmina:spice - Support connecting to SPICE-enabled virtual machines
net-misc/remmina:ssh - Enable support for SSH/SFTP protocol; see also 'vte'
net-misc/remmina:telepathy - Enable telepathy support
net-misc/remmina:webkit - Enable a user survey using net-libs/webkit-gtk
net-misc/rsync:stunnel - Provide helper scripts for using rsync via >=net-misc/stunnel-4
net-misc/rygel:tracker - Install dependencies for the tracker plugin
net-misc/rygel:transcode - Install dependencies for transcoding support
net-misc/scponly:gftp - Enables gFTP compatibility
net-misc/scponly:logging - Enables SFTP logging compatibility
net-misc/scponly:passwd - Enables passwd compatibility
net-misc/scponly:quota - Enables quota compatibility
net-misc/scponly:rsync - Enables rsync compatibility with potential security risks
net-misc/scponly:scp - Enables scp compatibility with potential security risks
net-misc/scponly:sftp - Enables SFTP compatibility
net-misc/scponly:subversion - Enables Subversion compatibility with potential security risks
net-misc/scponly:unison - Enables Unison compatibility with potential security risks
net-misc/scponly:wildcards - Enables wildcard processing with potential security risks
net-misc/scponly:winscp - Enables WinSCP 2.0 compatibility with potential security risks
net-misc/seafile-client:shibboleth - Build support for Shibboleth single sign-on
net-misc/sitecopy:rsh - This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.
net-misc/sitecopy:webdav - Enable WebDav (Web-based Distributed Authoring and Versioning) support. This system allows users to collaborate on websites using a web based interface. See the ebuild for an FAQ page. Enables neon as well to handle webdav support.
net-misc/sks:optimize - Enables bytecode optimization
net-misc/slimrat:X - Install also GUI client
net-misc/spice-gtk:dbus - Support for desktop integration such as automounting and other APIs exposed by your DE via D-Bus
net-misc/spice-gtk:gstaudio - Using gstreamer backend as audio decodec support
net-misc/spice-gtk:gstvideo - Using gstreamer backend as video decodec support
net-misc/spice-gtk:gtk3 - Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
net-misc/spice-gtk:lz4 - Enable support for LZ4 compression using app-arch/lz4
net-misc/spice-gtk:mjpeg - Enable builtin mjpeg video decoder
net-misc/spice-gtk:policykit - Enable sys-auth/polkit support for the usbredir acl helper
net-misc/spice-gtk:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
net-misc/spice-gtk:webdav - Support for folder-sharing between guest and client using net-libs/phodav
net-misc/sshrc:mosh - Install Support for mosh
net-misc/stargazer:debug - Enable extra debug codepaths, like asserts and extra output.
net-misc/stargazer:doc - Adds extra documentation (API, doc, etc).
net-misc/stargazer:examples - Install examples, usually source code.
net-misc/stargazer:module_auth_always_online - Enable build of "Always Online" authentication module for Stargazer.
net-misc/stargazer:module_auth_freeradius - Enable build of "Radius" authentication module for Stargazer. This module capable of using RADIUS procotol for user authentication.
net-misc/stargazer:module_auth_internet_access - Enable build of "InetAccess" authentication module for Stargazer. InetAccess is a Stargazer specific authentication protocol.
net-misc/stargazer:module_capture_ether - Enable build of "Ethernet" traffic capture module for Stargazer. This module uses RAW sockets to capture traffic.
net-misc/stargazer:module_capture_ipq - Enable build of "IPQ" traffic capture module for Stargazer. This module uses IPQ subsystem to capture traffic.
net-misc/stargazer:module_capture_netflow - Enable build of "NetFlow" traffic capture module for Stargazer. This module capable of receiving traffic data by NetFlow protocol.
net-misc/stargazer:module_config_rpcconfig - Enable build of "XMLRPC" configuration module for Stargazer. This module uses XML-RPC protocol for configuring Stargazer.
net-misc/stargazer:module_config_sgconfig - Enable build of "SGConf" configuration module for Stargazer. This module uses Stargazer specific protocol for configuring Stargazer.
net-misc/stargazer:module_other_ping - Enable build of "Ping" module for Stargazer. This module pings connected users from time to time to ensure they are alive.
net-misc/stargazer:module_other_remote_script - Enable build of "Remote Script" module for Stargazer. This module control rscriptd daemon over the net and makes it execute scripts in reaction to different Stargazer events.
net-misc/stargazer:module_other_smux - Enable build of SMUX module for Stargazer. This module uses SMUX protocol to provide various information about Stargazer.
net-misc/stargazer:module_store_files - Enable build of storage plugin for Stargazer based on plain files.
net-misc/stargazer:module_store_firebird - Enable build of storage plugin for Stargazer, which uses Firebird database for storage.
net-misc/stargazer:module_store_mysql - Enable build of storage plugin for Stargazer, which uses MySQL for storage.
net-misc/stargazer:module_store_postgres - Enable build of storage plugin for Stargazer, which uses PostgreSQL for storage.
net-misc/stargazer:radius - Enable build of FreeRADIUS module for data access via Stargazer.
net-misc/stargazer:rscriptd - Enable build of remote script execute daemon for Stargazer, which run scripts when receive special signal from Stargazer.
net-misc/stargazer:sgauth - Enable build of command-line utility for authorization in Stargazer.
net-misc/stargazer:sgconf - Enable build of command-line utility for configuring Stargazer.
net-misc/stargazer:sgconf_xml - Enable build of command-line xml-based utility for configuring Stargazer.
net-misc/stargazer:sgconv - Enable build of utility to convert Stargazer data between storage backends.
net-misc/stargazer:stargazer - Enable build of Stargazer billing system.
net-misc/stargazer:static-libs - Install static libraries.
net-misc/streamtuner:shout - Enable shoutcast plug-in.
net-misc/streamtuner:xiph - Enable xiph.org plug-in.
net-misc/stunnel:stunnel3 - Install the stunnel3 wrapper.
net-misc/teamviewer:system-wine - Use app-emulation/wine instead of bundled wine.
net-misc/termpkg:uucp - Adds support for uucp style device locking
net-misc/tigervnc:drm - build with DRM support
net-misc/tigervnc:server - Build TigerVNC server
net-misc/tigervnc:xorgmodule - Build the Xorg module
net-misc/uftp:server - Install uftp server daemon
net-misc/vde:pcap - Enable the pcap-based plugin that allows creating a switch against a real interface.
net-misc/vde:ssl - Enable the cryptcab plugin that allows creating an encrypted virtual cable.
net-misc/vinagre:rdp - Enable access to Windows RDP protocol using net-misc/rdesktop
net-misc/vinagre:spice - Enable access to SPICE-enabled virtual machines
net-misc/vinagre:ssh - Enable ssh plugin using x11-libs/vte
net-misc/vinagre:telepathy - Enable access to remote desktop via a net-libs/telepathy-glib client
net-misc/vino:telepathy - Enable desktop sharing through a telepathy client
net-misc/wget:ntlm - Enable support for NTLM (Windows-based) authorization
net-misc/wget:uuid - Generate UUIDs for the WARC (Web ARChive file format) using libuuid; otherwise use a simple RNG (random number generator)
net-misc/wicd:ambiance - Install icons from Ubuntu's ambiance theme
net-misc/wicd:gnome-shell - Install gnome-shell extension
net-misc/wicd:gtk - Installs a gtk UI. This is enabled by default because it is intended behavior. Requires dev-python/pygtk
net-misc/wicd:ioctl - Installs additional python libraries to use as a backend. This will improve speed but is experimental.
net-misc/wicd:mac4lin - Change default icons to mac4lin icon set
net-misc/wicd:ncurses - Installs a ncurses UI
net-misc/wicd:pm-utils - Installs the pm-utils hooks for suspend/resume and requires sys-power/pm-utils
net-misc/x2goserver:fuse - Use net-fs/sshfs to allow shared folders
net-misc/youtube-viewer:gtk - Install the gtk GUI, called gtk-youtube-viewer
net-nds/389-ds-base:auto-dn-suffix - Enable auto bind with auto dn suffix over unix domain socket (LDAPI) support
net-nds/389-ds-base:autobind - Enable auto bind over unix domain socket (LDAPI) support
net-nds/389-ds-base:bitwise - Enable bitwise plugin - supported data in raw/bitwise format
net-nds/389-ds-base:dna - Enable dna (distributed numeric assignment ) plugin - to automatically assign unique uid numbers to new user entries as they are created.
net-nds/389-ds-base:ldapi - Enable LDAP over unix domain socket (LDAPI) support
net-nds/389-ds-base:pam-passthru - Enable pam-passthru plugin - for simple and fast system services used in ldap
net-nds/389-ds-base:presence - Enable presence plugin - non-stabdart syntax validation
net-nds/gosa-core:mail - Manage mail accounts and servers with gosa.
net-nds/gosa-core:samba - Manage samba accounts with gosa.
net-nds/ldapvi:gnutls - Use net-libs/gnutls instead of dev-libs/openssl
net-nds/nsscache:nsscache - Depend on sys-auth/libnss-cache to handle flat files
net-nds/nsscache:nssdb - Depend on sys-libs/libnss_db to handle dbm files.
net-nds/openldap:experimental - Enable experimental backend options
net-nds/openldap:kinit - Enable support for kerberos init
net-nds/openldap:minimal - Build libraries & userspace tools only. Does not install any server code.
net-nds/openldap:odbc - Enable ODBC and SQL backend options
net-nds/openldap:overlays - Enable contributed OpenLDAP overlays
net-nds/openldap:pbkdf2 - Enable support for pbkdf2 passwords
net-nds/openldap:sha2 - Enable support for pw-sha2 password hashes.
net-nds/openldap:smbkrb5passwd - Enable overlay for syncing ldap, unix and lanman passwords
net-nds/rpcbind:warmstarts - Enables rpcbind to cache configuration for warm restarts
net-nds/tac_plus:finger - Adds support for checking user counts via fingering the NAS
net-nds/tac_plus:maxsess - Enforce a limit on maximum sessions per user
net-news/rssguard:webengine - Use dev-qt/qtwebengine for embedded web browser
net-nntp/inn:innkeywords - Enable automatic keyword generation support
net-nntp/inn:inntaggedhash - Use tagged hash table for history (disables large file support)
net-nntp/nzbget:parcheck - Enable support for checking PAR archives
net-nntp/sabnzbd:7za - Add support for extracting 7za files
net-nntp/sabnzbd:rar - Add support for extracting rar files
net-nntp/sabnzbd:unzip - Add support for extracting zip files
net-nntp/slrn:canlock - Add support for cancel locks via net-libs/canlock
net-nntp/slrn:uudeview - Add support for yEnc coding and more using dev-libs/uulib
net-nntp/tin:cancel-locks - Enable Cancel-Lock header functionality (also enables USE=evil)
net-nntp/tin:etiquette - Enable the display off posting etiquettes
net-nntp/tin:evil - Let tin generate a message ID
net-nntp/tin:forgery - Cancel messages posted from a different account
net-nntp/tin:gpg - Enable app-crypt/gnupg support
net-p2p/airdcpp-webclient:nat-pmp - Enable support for the NAT-PMP protocol
net-p2p/airdcpp-webclient:tbb - Enable support of the TBB library to improve performance
net-p2p/airdcpp-webclient:webui - Enable the Web UI
net-p2p/amule:daemon - Enable amule daemon
net-p2p/amule:remote - Enable remote controlling of the client
net-p2p/amule:stats - Enable statistic reporting
net-p2p/bitcoin-cli:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoin-cli:ljr - Enable Luke Dashjr's patches
net-p2p/bitcoin-qt:bitcoin_policy_rbf - Replace By Fee policy: Your node will preferentially mine and relay transactions paying the highest fee, regardless of receive order
net-p2p/bitcoin-qt:bitcoin_policy_spamfilter - Enhanced spam filter policy: Notorious spammers will not be assisted by your node
net-p2p/bitcoin-qt:http - Enable support for the JSON-RPC and REST HTTP server (builtin net-p2p/bitcoind)
net-p2p/bitcoin-qt:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoin-qt:libevent - Use dev-libs/libevent
net-p2p/bitcoin-qt:ljr - Enable Luke Dashjr's patches
net-p2p/bitcoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/bitcoin-qt:tor - Enable automatic configuration of a Tor hidden service
net-p2p/bitcoin-qt:upnp - Enable Universal Plug and Play
net-p2p/bitcoin-qt:wallet - Enable wallet support
net-p2p/bitcoin-qt:zeromq - Report blocks and transactions via zeromq
net-p2p/bitcoind:bitcoin_policy_rbf - Replace By Fee policy: Your node will preferentially mine and relay transactions paying the highest fee, regardless of receive order
net-p2p/bitcoind:bitcoin_policy_spamfilter - Enhanced spam filter policy: Notorious spammers will not be assisted by your node
net-p2p/bitcoind:knots - Build enhanced Bitcoin Knots version, rather than Bitcoin Core
net-p2p/bitcoind:ljr - Enable Luke Dashjr's patches
net-p2p/bitcoind:upnp - Enable Universal Plug and Play
net-p2p/bitcoind:wallet - Enable wallet support
net-p2p/bitcoind:zeromq - Report blocks and transactions via zeromq
net-p2p/bitcoinxt-qt:ljr - Enable Luke Dashjr's patches
net-p2p/bitcoinxt-qt:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/bitcoinxt-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/bitcoinxt-qt:wallet - Enable wallet support
net-p2p/bitcoinxtd:doc - Include documentatio
net-p2p/bitcoinxtd:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/bitcoinxtd:upnp - Enable Universal Plug and Play
net-p2p/bitcoinxtd:wallet - Enable wallet support
net-p2p/datacoin-hp:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/dbhub:switch_user - Enable support for switching user
net-p2p/deluge:console - Enable default console UI
net-p2p/deluge:linguas_iu - Inuktitut locale
net-p2p/deluge:linguas_nap - Neapolitan locale
net-p2p/deluge:linguas_pms - Piemontese locale
net-p2p/deluge:webinterface - Install dependencies needed for the web interface
net-p2p/dogecoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/eiskaltdcpp:cli - Enable sample cli based on readline
net-p2p/eiskaltdcpp:daemon - Enable eiskaltdcpp-daemon
net-p2p/eiskaltdcpp:dht - Enable DHT (distributed hash table) support for libeiskaltdcpp
net-p2p/eiskaltdcpp:emoticons - Install emoticon packs
net-p2p/eiskaltdcpp:json - Enable JSON for cli and daemon
net-p2p/eiskaltdcpp:libcanberra - Enable sound notifications support over libcanberra in EiskaltDC++ Gtk
net-p2p/eiskaltdcpp:minimal - Don't install headers
net-p2p/fms:frost - Add support for frost boards
net-p2p/go-ethereum:evm - Build Ethereum Virtual Machine (EVM)
net-p2p/go-ethereum:opencl - Add OpenCL GPU mining support
net-p2p/go-ipfs-bin:fuse - Enable runtime support for sys-fs/fuse
net-p2p/ktorrent:bwscheduler - Schedule upload and download limits over a period of a week
net-p2p/ktorrent:downloadorder - Specify the download order of a multi-file torrent
net-p2p/ktorrent:infowidget - Displays general information about a torrent in several tabs
net-p2p/ktorrent:logviewer - Displays the logging output
net-p2p/ktorrent:magnetgenerator - Generates magnet URI's
net-p2p/ktorrent:mediaplayer - Phonon-based media player
net-p2p/ktorrent:shutdown - Shutdown when done
net-p2p/ktorrent:stats - Shows statistics about torrents in several graphs
net-p2p/ktorrent:zeroconf - Discover peers on the local network using the Zeroconf protocol
net-p2p/litecoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/litecoind:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/litecoind:wallet - Enable wallet support
net-p2p/mldonkey:bittorrent - enable bittorrent support
net-p2p/mldonkey:fasttrack - enable fasttrack support
net-p2p/mldonkey:gnutella - enable gnutella and gnutella2 support
net-p2p/mldonkey:guionly - enable client build only
net-p2p/mldonkey:magic - enable use of libmagic
net-p2p/ppcoind:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/primecoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/primecoind:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/pybitmessage:opencl - Uses dev-python/pyopencl for GPU acceleration.
net-p2p/qbittorrent:webui - Enable the Web UI
net-p2p/retroshare:cli - Enables the CLI version of RetroShare
net-p2p/retroshare:feedreader - Enables the Feedreader plugin
net-p2p/retroshare:gui - Enables the GUI version of RetroShare
net-p2p/retroshare:voip - Enables VOIP plugin
net-p2p/rtorrent:daemon - Uses app-misc/screen to daemonize this application
net-p2p/syncthing:tools - Install stdiscosrv, strelaysrv and other tools to /usr/libexec/syncthing/.
net-p2p/transmission:lightweight - Optimize transmission for low-resource systems (smaller cache size, prefer unencrypted peer connections, etc.)
net-p2p/transmission:mbedtls - Use mbed TLS instead of OpenSSL
net-p2p/transmission:xfs - Enable XFS filesystem capabilities by using sys-fs/xfsprogs headers (in building of fdlimit(.c))
net-p2p/transmission-remote-gtk:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration.
net-p2p/tribler:vlc - Enable vlc support.
net-print/cups:java - Add support for the Java interpeter in the web server CGIs.
net-print/cups:lprng-compat - Do not install lp... binaries so cups and lprng can coexist.
net-print/cups:python - Add support for the Python interpeter in the web server CGIs.
net-print/cups-filters:foomatic - Build the included foomatic-rip printer driver. Strongly recommended.
net-print/cups-filters:ipp_autosetup - Let cups-browsed automatically set up IPP network printers by default.
net-print/fax4cups:efax - Install net-misc/efax backend
net-print/fax4cups:hylafax - Install net-misc/hylafax backend
net-print/fax4cups:mgetty-fax - Install net-dialup/mgetty backend
net-print/hplip:X - Enables scanner GUI dependencies with USE="scanner" where media-gfx/xsane is preferred over media-gfx/sane-frontends
net-print/hplip:fax - Enable fax on multifunction devices which support it
net-print/hplip:hpcups - Build the hpcups driver for cups (by HP)
net-print/hplip:hpijs - Build the IJS driver for cups (Foomatic)
net-print/hplip:kde - Enables kde-misc/skanlite as scanner GUI with USE="scanner X"
net-print/hplip:libusb0 - Depend on virtual/libusb SLOT 0. Some old printers do not work with virtual/libusb SLOT 1.
net-print/hplip:minimal - Only build internal hpijs/hpcups driver (not recommended at all, make sure you know what you are doing)
net-print/hplip:parport - Enable parallel port for devices which require it
net-print/hplip:scanner - Enable scanner on multifunction devices which support it
net-print/hplip:snmp - Add support for net-analyzer/net-snmp which enables this driver to work over networks (both for server and client)
net-print/hplip:static-ppds - Use statically-generated PPDs instead of Dynamic PPDs. Although this is deprecated some printers may still need it to work properly. Use this flag if hp-setup fails to find/create a valid PPD file
net-print/magicfilter:lprng-failsafe - Refuse options for compability with certain LPRng versions.
net-proxy/haproxy:51degrees - Device Detection using 51 Degrees
net-proxy/haproxy:device-atlas - Use dev-libs/device-atlas-api-c library
net-proxy/haproxy:net_ns - Enable network namespace support (CONFIG_NET_NS)
net-proxy/haproxy:pcre-jit - Use JIT support for PCRE
net-proxy/haproxy:slz - Use dev-libs/libslz compression library
net-proxy/haproxy:tools - Install additional tools (halog, iprange)
net-proxy/haproxy:wurfl - Device Detection using WURFL
net-proxy/privoxy:client-tags - Enable support for client-specific tags
net-proxy/privoxy:compression - Allow privoxy to compress buffered content before sending to the client, if it supports it
net-proxy/privoxy:editor - Enable the web-based actions file editor
net-proxy/privoxy:extended-host-patterns - Enable and require PCRE syntax in host patterns. You must convert action files to PCRE, see privoxy-url-pattern-translator.pl Use at your own risk!
net-proxy/privoxy:external-filters - Allow to filter content with scripts and programs. Experimental
net-proxy/privoxy:fast-redirects - Support fast redirects
net-proxy/privoxy:force - Allow single-page disable (force load)
net-proxy/privoxy:graceful-termination - Allow to shutdown Privoxy through the webinterface
net-proxy/privoxy:ie-images - Enable a quick but not always reliable auto-detect whether requests from MS Internet Explorer are for an image or not
net-proxy/privoxy:image-blocking - Allows the +handle-as-image action, to send "blocked" images instead of HTML
net-proxy/privoxy:lfs - Support large files (>2GB) on 32-bit systems
net-proxy/privoxy:png-images - Use PNG format instead of GIF for built-in images
net-proxy/privoxy:stats - Keep statistics
net-proxy/privoxy:toggle - Support temporary disable toggle via web interface
net-proxy/privoxy:tools - Install log parser, regression tester and user agent generator tools
net-proxy/privoxy:whitelists - Support trust files (white lists)
net-proxy/privoxy:zlib - Use sys-libs/zlib to decompress data before filtering
net-proxy/rejik:banlists - Install upstream provided simple banlists
net-proxy/shadowsocks-libev:mbedtls - Use net-libs/mbedtls as crypto backend
net-proxy/shadowsocks-libev:openssl - Use dev-libs/openssl as crypto backend
net-proxy/shadowsocks-libev:system-libs - Use system libraries instead of the ones included in the upstream distribution
net-proxy/squid:ecap - Adds support for loadable content adaptation modules (http://www.e-cap.org)
net-proxy/squid:esi - Enable ESI for accelerators, will cause squid reverse proxies to be capable of the Edge Acceleration Specification (www.esi.org)
net-proxy/squid:htcp - Enable HTCP protocol
net-proxy/squid:ipf-transparent - Adds transparent proxy support for systems using IP-Filter (only for *bsd)
net-proxy/squid:kqueue - Enables *BSD kqueue() support
net-proxy/squid:logrotate - Use app-admin/logrotate for rotating logs
net-proxy/squid:pf-transparent - Adds transparent proxy support for systems using PF (only for *bsd)
net-proxy/squid:qos - Adds support for Quality of Service using netfilter conntrack - see qos_flow directive for more info
net-proxy/squid:ssl-crtd - Adds support for dynamic SSL certificate generation in SslBump environments
net-proxy/squid:tproxy - Enables real Transparent Proxy support for Linux Netfilter TPROXY
net-proxy/squid:wccp - Enable Web Cache Coordination Protocol
net-proxy/squid:wccpv2 - Enable Web Cache Coordination V2 Protocol
net-proxy/tinyproxy:filter-proxy - Enable filtering of domains/URLS
net-proxy/tinyproxy:reverse-proxy - Enable reverse proxying
net-proxy/tinyproxy:transparent-proxy - Enable transparent proxying
net-proxy/tinyproxy:upstream-proxy - Enable upstream proxying
net-proxy/tinyproxy:xtinyproxy-header - Include the X-Tinyproxy header
net-proxy/tsocks:dns - Force DNS queries to use SOCKS server via tcp
net-proxy/tsocks:envconf - Allow TSOCKS_CONF_FILE to specify configuration file
net-proxy/tsocks:server-lookups - Allow hostname resolution _for_ SOCKS servers
net-proxy/tsocks:tordns - Apply tordns patch which allows transparent TORification of the DNS queries
net-proxy/ufdbguard:doc - Download and install the ufdbguard reference manual in PDF.
net-proxy/ufdbguard:httpd - Build, install and start the provided mini-http daemon with the redirect CGI integrated. Since there is no way to tell ufdbguard to not start it, this is a build-time option.
net-voip/ekiga:h323 - Enable H.323 protocol
net-voip/ekiga:shm - Enable the Shared Memory Extension from libXext
net-voip/linphone:assistant - Turn on assistant compiling (needs gtk enabled)
net-voip/linphone:gsm-nonstandard - Support non-standard GSM frequencies
net-voip/linphone:sqlite - Turn on compilation of message storage
net-voip/linphone:tools - Compile tools
net-voip/linphone:video - Enable video support (display/capture)
net-voip/telepathy-gabble:plugins - Enable plugin loader
net-voip/yate:amrnb - use AMR-NB
net-voip/yate:dahdi - Enable Dahdi driver
net-voip/yate:gsm - use GSM codec
net-voip/yate:h323 - use OpenH323
net-voip/yate:ilbc - Enable iLBC codec
net-voip/yate:ilbc-webrtc - Enable iLBC webrtc codec
net-voip/yate:isac-fixed - Enable iSAC fixed codec
net-voip/yate:isac-float - Enable iSAC float codec
net-voip/yate:mysql - use MySQL client library
net-voip/yate:postgres - use Postgress SQL
net-voip/yate:spandsp - use spandsp library
net-voip/yate:speex - use Speex codec
net-voip/yate:tdmcard - Enable TDMV API card driver
net-voip/yate:wanpipe - Enable Wanpipe support
net-voip/yate:wpcard - Enable Wanpipe card driver
net-voip/yate:zaptel - Enable Zaptel driver
net-vpn/badvpn:client - Build the badvpn-client program, a daemon that runs on endpoints of the VPN.
net-vpn/badvpn:ncd - Build NCD, a lightweight scripting language especially suited for network configurations.
net-vpn/badvpn:server - Build the badvpn-server program, a central server that manages the VPN network.
net-vpn/badvpn:tun2socks - Build tun2socks, a program which implements a TUN device that forwards TCP traffic through a SOCKS5 server.
net-vpn/badvpn:udpgw - Build udpgw, a small daemon which allows tun2socks to forward UDP traffic.
net-vpn/i2p:ecdsa - Enables additional checks to make sure a setup is available that is capable of using I2Ps ECDSA provisions. I2P will work without it, but you will likely see warnings.
net-vpn/i2p:nls - Adds Native Language Support using GNU gettext.
net-vpn/i2pd:i2p-hardening - Compile with hardening on vanilla compilers/linkers
net-vpn/ipsec-tools:hybrid - Makes available both mode-cfg and xauth support
net-vpn/ipsec-tools:idea - Enable support for the IDEA algorithm
net-vpn/ipsec-tools:nat - Enable NAT-Traversal
net-vpn/ipsec-tools:rc5 - Enable support for the patented RC5 algorithm
net-vpn/ipsec-tools:stats - Enable statistics reporting
net-vpn/libreswan:dnssec - Use DNSSEC resolver (requires net-dns/unbound
net-vpn/openconnect:gssapi - Build GSSAPI support
net-vpn/openconnect:java - Build JNI bindings using jni.h
net-vpn/openconnect:libproxy - Enable proxy support
net-vpn/openconnect:lz4 - Enable support for lz4 compression
net-vpn/openconnect:stoken - Enable stoken support
net-vpn/openvpn:down-root - Enable the down-root plugin
net-vpn/openvpn:iproute2 - Enabled iproute2 support instead of net-tools
net-vpn/openvpn:lz4 - Enable LZ4 support
net-vpn/openvpn:mbedtls - Use mbed TLS instead of OpenSSL
net-vpn/openvpn:pkcs11 - Enable PKCS#11 smartcard support
net-vpn/openvpn:plugins - Enable the OpenVPN plugin system
net-vpn/pptpd:gre-extreme-debug - Log all GRE accepted packages when in debug mode (required if you want upstream support)
net-vpn/strongswan:constraints - Enable advanced X.509 constraint checking plugin.
net-vpn/strongswan:dhcp - Enable server support for querying virtual IP addresses for clients from a DHCP server. (IKEv2 only)
net-vpn/strongswan:eap - Enable support for the different EAP modules that is supported.
net-vpn/strongswan:farp - Enable faking of ARP responses for virtual IP addresses assigned to clients. (IKEv2 only)
net-vpn/strongswan:gcrypt - Enable dev-libs/libgcrypt plugin which provides 3DES, AES, Blowfish, Camellia, CAST, DES, Serpent and Twofish ciphers along with MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+). Also includes a software random number generator.
net-vpn/strongswan:non-root - Force IKEv1/IKEv2 daemons to normal user privileges. This might impose some restrictions mainly to the IKEv1 daemon. Disable only if you really require superuser privileges.
net-vpn/strongswan:openssl - Enable dev-libs/openssl plugin which is required for Elliptic Curve Cryptography (DH groups 19-21,25,26) and ECDSA. Also provides 3DES, AES, Blowfish, Camellia, CAST, DES, IDEA and RC5 ciphers along with MD2, MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+) dev-libs/openssl has to be compiled with USE="-bindist".
net-vpn/strongswan:pkcs11 - Enable pkcs11 support.
net-vpn/strongswan:strongswan_plugins_blowfish - Enable support for the blowfish plugin.
net-vpn/strongswan:strongswan_plugins_ccm - Enable support for the ccm plugin.
net-vpn/strongswan:strongswan_plugins_ctr - Enable support for the ctr plugin.
net-vpn/strongswan:strongswan_plugins_gcm - Enable support for the gcm plugin.
net-vpn/strongswan:strongswan_plugins_ha - Enable support for the ha plugin.
net-vpn/strongswan:strongswan_plugins_ipseckey - Enable support for the ipseckey plugin.
net-vpn/strongswan:strongswan_plugins_led - Enable support for the led plugin.
net-vpn/strongswan:strongswan_plugins_lookip - Enable support for the lookip plugin.
net-vpn/strongswan:strongswan_plugins_ntru - Enable support for the ntru plugin.
net-vpn/strongswan:strongswan_plugins_padlock - Enable support for the padlock plugin.
net-vpn/strongswan:strongswan_plugins_rdrand - Enable support for the rdrand plugin.
net-vpn/strongswan:strongswan_plugins_systime-fix - Enable support for the systime-fix plugin.
net-vpn/strongswan:strongswan_plugins_unbound - Enable support for the unbound plugin.
net-vpn/strongswan:strongswan_plugins_unity - Enable support for the unity plugin.
net-vpn/strongswan:strongswan_plugins_vici - Enable support for the vici plugin.
net-vpn/strongswan:strongswan_plugins_whitelist - Enable support for the whitelist plugin.
net-vpn/tinc:gui - Add GUI support, using dev-python/wxpython
net-vpn/tinc:uml - Enable support for User Mode Linux Sockets
net-vpn/tinc:vde - Enable Virtual Distributed Ethernet (VDE) based networking
net-vpn/tor:scrypt - Use app-crypt/libscrypt for the scrypt algorithm
net-vpn/tor:tor-hardening - Compile tor with hardening on vanilla compilers/linkers
net-vpn/tor:web - Build a tor2web service instead of a tor client
net-vpn/tor:zstd - Use app-arch/zstd for compression
net-vpn/vpnc:resolvconf - Enable support for DNS managing framework net-dns/openresolv
net-vpn/wireguard:debug - Enable verbose debug reporting in dmesg of various WireGuard peer and device information.
net-vpn/wireguard:module - Compile the actual WireGuard kernel module. Most certainly you want this enabled, unless you're doing something strange.
net-vpn/wireguard:module-src - Install the module source code to /usr/src, in case you like building kernel modules yourself.
net-vpn/wireguard:tools - Compile the wg(8) tool and related helpers. You probably want this enabled.
net-wireless/aircrack-ng:airdrop-ng - Build airdrop-ng
net-wireless/aircrack-ng:airgraph-ng - Build airgraph-ng
net-wireless/aircrack-ng:experimental - Build the "experimental" tools which may randomly fail to run properly
net-wireless/aircrack-ng:netlink - Use netlink for channel control instead of WEXT
net-wireless/aircrack-ng:unstable - Build the "unstable" tools which may randomly fail to run properly
net-wireless/bladerf:tecla - use libtecla for command line editing, tab completion, and history
net-wireless/bladerf-fpga:x115 - bitstream for the x115KLE Cyclone IV FPGA bladerf model"
net-wireless/bladerf-fpga:x40 - bitstream for the x40KLE Cyclone IV FPGA bladerf model"
net-wireless/blueman:appindicator - Enable usage of dev-libs/libappindicator to export menu options
net-wireless/blueman:network - Add functionality to setup (host) PAN connections using either net-dns/dnsmasq or net-misc/dhcp
net-wireless/blueman:thunar - Install the sendto-plugin for xfce-base/thunar
net-wireless/bluez:deprecated - Build deprecated plugins
net-wireless/bluez:experimental - Build experimental plugins
net-wireless/bluez:extra-tools - Install tools that upstream doesn't install on purpose by default. All this tools shouldn't be used. Then, please notify upstream about you still need them to let them know the situation.
net-wireless/bluez:obex - Enable OBEX transfer support.
net-wireless/bluez:test-programs - Install tools for testing of various Bluetooth functions
net-wireless/bluez:user-session - Allow compatibility with user-session semantics for session bus under systemd
net-wireless/chirp:radioreference - support downloading data from radioreference.com (premium users only)
net-wireless/crda:gcrypt - Use libgcrypt instead of openssl for key checking
net-wireless/gnuradio:analog - enable analog signal processing blocks
net-wireless/gnuradio:atsc - enable ATSC (HDTV) transmitter and receiver blocks
net-wireless/gnuradio:audio - enable blocks to connect to audio sources (mic-in) and sinks (speaker-out) ports on a computer
net-wireless/gnuradio:channels - enable channel mode blocks
net-wireless/gnuradio:digital - enable digital signal processing blocks
net-wireless/gnuradio:dtv - enable digital tv signal processing blocks
net-wireless/gnuradio:fcd - enable Funcube Dongle source block
net-wireless/gnuradio:fec - enable block for convolutional encoding using the CCSDS standard polynomial ("Voyager")
net-wireless/gnuradio:filter - enable filter signal processing blocks
net-wireless/gnuradio:grc - enable GNU Radio Companion graphical tool to design signal processing flow graphs
net-wireless/gnuradio:log - enable logging to console and files
net-wireless/gnuradio:noaa - enable NOAA POES HRPT receiver blocks
net-wireless/gnuradio:pager - enable pager signal processing blocks
net-wireless/gnuradio:performance-counters - enable block performance counters
net-wireless/gnuradio:trellis - enable trellis blocks for FSM
net-wireless/gnuradio:uhd - install UHD source and sink blocks
net-wireless/gnuradio:utils - install scripts to enable viewing and analysis of files produced by flow graphs
net-wireless/gnuradio:vocoder - enable blocks for audio voice encoders
net-wireless/gnuradio:wavelet - enable wavelet signal processing blocks
net-wireless/gnuradio:zeromq - enable zeromq message passing blocks
net-wireless/gqrx:gr-audio - Use audio support from net-wireless/gnuradio
net-wireless/gr-air-modes:fgfs - Support FlightGear
net-wireless/gr-air-modes:gui - Build the GUI
net-wireless/gr-air-modes:rtlsdr - Build with Realtek RTL2832U (rtlsdr) support
net-wireless/gr-air-modes:uhd - Build with Ettus Research USRP Hardware Driver support
net-wireless/gr-baz:armadillo - install MUSIC DOA estimator block
net-wireless/gr-baz:rtlsdr - install rtlsdr source block
net-wireless/gr-baz:uhd - install UHD aware blocks
net-wireless/gr-osmosdr:bladerf - Build with Nuand BladeRF support
net-wireless/gr-osmosdr:fcd - Build with Funcube Dongle support
net-wireless/gr-osmosdr:hackrf - Build with Great Scott Gadgets HackRF support
net-wireless/gr-osmosdr:iqbalance - Enable support for I/Q balancing using gr-iqbal
net-wireless/gr-osmosdr:mirisdr - Build with Mirics MSi2500 + MSi001 SDR support
net-wireless/gr-osmosdr:rtlsdr - Build with Realtek RTL2832U (rtlsdr) support
net-wireless/gr-osmosdr:uhd - Build with Ettus Research USRP Hardware Driver support
net-wireless/horst:pcap - Add support for network packet capture via net-libs/libpcap
net-wireless/kismet:client - Build the ncurses-based user interface
net-wireless/kismet:pcre - Build with pcre support
net-wireless/kismet:plugin-autowep - Build the autowep plugin
net-wireless/kismet:plugin-btscan - Build the btscan plugin
net-wireless/kismet:plugin-dot15d4 - Build the dot15d4 plugin
net-wireless/kismet:plugin-ptw - Build the ptw plugin
net-wireless/kismet:plugin-spectools - Build the spectools plugin. This uses net-wireless/spectools
net-wireless/kismet:plugin-syslog - Build the syslog plugin.
net-wireless/kismet:ruby - Build extras which are written in ruby, example plugins and the like.
net-wireless/kismet:speech - Audio support using app-accessibility/flite
net-wireless/kismet:suid - Install a setuid root helper binary with limited functionality; this allows running kismet as a normal user, significantly reducing security risks
net-wireless/neard:tools - build and install extra helper utilities
net-wireless/openbsc:gprs - Support GPRS via OpenGGSN
net-wireless/osmocom-bb:transmit - Enable transmission capabilities.
net-wireless/pyrit:cuda - Enable CUDA support via net-wireless/cpyrit-cuda
net-wireless/pyrit:opencl - Enable OpenCL support via net-wireless/cpyrit-opencl
net-wireless/spectools:debug - Build the raw output client for spectools. (for developers)
net-wireless/spectools:gtk - Build the gtk-2 based client for spectools
net-wireless/spectools:ncurses - Build the ncurses based client for spectools
net-wireless/ubertooth:bluez - use bluez to support clock following and scanning
net-wireless/ubertooth:pcap - Use libpcap for packet capture and read/write
net-wireless/ubertooth:specan - Enable the ubertooth spectrum analyzer
net-wireless/ubertooth:ubertooth1-firmware - Build/install ubertooth1-firmware
net-wireless/urh:hackrf - use native backend which directly uses net-libs/libhackrf
net-wireless/urh:rtlsdr - use native backend which directly uses net-wireless/rtl-sdr
net-wireless/urh:uhd - use native backend which directly uses net-wireless/uhd
net-wireless/wepattack:john - Build with app-crypt/johntheripper support
net-wireless/wireless-tools:multicall - Build the most commonly used tools as one binary
net-wireless/wpa_supplicant:ap - Add support for access point mode
net-wireless/wpa_supplicant:eap-sim - Add support for EAP-SIM authentication algorithm
net-wireless/wpa_supplicant:fasteap - Add support for FAST-EAP authentication algorithm
net-wireless/wpa_supplicant:hs2-0 - Add support for 802.11u and Passpoint for HotSpot 2.0
net-wireless/wpa_supplicant:p2p - Add support for Wi-Fi Direct mode
net-wireless/wpa_supplicant:ps3 - Add support for ps3 hypervisor driven gelic wifi
net-wireless/wpa_supplicant:smartcard - Add support for smartcards
net-wireless/wpa_supplicant:tdls - Add support for Tunneled Direct Link Setup (802.11z)
net-wireless/wpa_supplicant:uncommon-eap-types - Add support for GPSK, SAKE, GPSK_SHA256, IKEV2 and EKE
net-wireless/wpa_supplicant:wimax - Add support for Wimax EAP-PEER authentication algorithm
net-wireless/wpa_supplicant:wps - Add support for Wi-Fi Protected Setup
net-wireless/yatebts:bladerf - Build bladeRF transceiver
net-wireless/yatebts:rad1 - Build RAD1 transceiver
net-wireless/yatebts:uhd - Build UHD transceiver
net-wireless/yatebts:usrp1 - Build USRP1 transceiver
sci-astronomy/casacore:c++11 - Build casacore using the C++11 standard
sci-astronomy/casacore:data - Installs measures and data (pulls sci-astronomy/casa-data)
sci-astronomy/cpl:gasgano - Enable support for sci-astronomy/gasgano file organizer
sci-astronomy/healpix:idl - Install healpix IDL/GDL routines
sci-astronomy/predict:xforms - Add a "map" client which uses the x11-libs/xforms library for its GUI
sci-astronomy/predict:xplanet - Project predict data onto world maps generated by x11-misc/xplanet / x11-misc/xearth
sci-astronomy/psfex:plplot - Build with sci-libs/plplot to allow diagnostic plots during processing
sci-astronomy/scamp:plplot - Build with sci-libs/plplot to allow diagnostic plots during processing
sci-astronomy/sextractor:modelfit - Enable profile model fitting, needs sci-libs/atlas and sci-libs/fftw
sci-astronomy/stellarium:media - Enable sound and video support
sci-astronomy/stellarium:sound - Enable sound support
sci-astronomy/stellarium:stars - Install extra star catalogs
sci-astronomy/wcslib:fits - Enable support for the FITS format through sci-libs/cfitsio
sci-astronomy/wcslib:pgplot - Builds PGBSOX routines, needs sci-libs/pgplot library
sci-astronomy/wcslib:tools - Builds and installs extra command line utilities for WCS checking
sci-biology/abyss:misc-haskell - build abyss-samtobreak tool, pull in haskell toolchain
sci-biology/bioperl:db - Install sci-biology/bioperl-run
sci-biology/bioperl:network - Install sci-biology/bioperl-run
sci-biology/bioperl:run - Install sci-biology/bioperl-run
sci-biology/bowtie:tbb - Enables building bowtie with the Intel Threading Building Blocks from dev-cpp/tbb. This flag is recommended.
sci-biology/clustalw-mpi:mpi_njtree - Use MPI (as opposed to serial) code for computing neighbor-joining trees
sci-biology/clustalw-mpi:static_pairalign - Use static (as opposed to dynamic) scheduling for pair alignments
sci-biology/exonerate:utils - Install all utilities
sci-biology/fasttree:double-precision - use double precision instead of single-precision floating point (2x memroy required)
sci-biology/goby:cpp - Compile C/C++ API
sci-biology/mcl:blast - add support for NCBI BLAST data
sci-biology/plink:R - add support R language
sci-biology/plink:webcheck - add support for online update checking every time the program starts
sci-biology/ucsc-genome-browser:server - Install genome browser Web application. If this flag is off, only libraries and utilities from the suite are installed.
sci-biology/yass:dmalloc - Enable debugging with the dmalloc library
sci-biology/yass:lowmem - Build for environments with low amounts of memory
sci-calculators/units:units_cur - Install the units_cur python script that updates currencies
sci-chemistry/PyMca:matplotlib - Support for plotting through matplotlib
sci-chemistry/apbs:fast - APBS fast mode (experimental)
sci-chemistry/apbs:fetk - Include support for FeTK
sci-chemistry/apbs:iapbs - C/C++/Fortran interface
sci-chemistry/apbs:tools - Install optional tools
sci-chemistry/avogadro:glsl - Enable glsl features via GLEW.
sci-chemistry/avogadro2:rpc - Enable RPC server
sci-chemistry/avogadro2:vtk - include vtk support
sci-chemistry/ball:cuda - Include cuda support
sci-chemistry/ball:sql - Include SQL database support
sci-chemistry/chemtool:emf - EMF export support
sci-chemistry/cns:aria - Support patch for sci-chemistry/aria
sci-chemistry/eden:double-precision - More precise calculations at the expense of speed
sci-chemistry/ghemical:openbabel - Use sci-chemistry/openbabel for file conversions
sci-chemistry/gromacs:boost - Enable external boost library
sci-chemistry/gromacs:cuda - Enable cuda non-bonded kernels
sci-chemistry/gromacs:double-precision - More precise calculations at the expense of speed
sci-chemistry/gromacs:hwloc - Enable HWLoc lib support
sci-chemistry/gromacs:make-symlinks - Create symbolic links for pre-5.0 binary names
sci-chemistry/gromacs:mkl - Use sci-libs/mkl for fft, blas, lapack routines
sci-chemistry/gromacs:offensive - Enable gromacs partly offensive quotes
sci-chemistry/gromacs:single-precision - Single precision version of gromacs (default)
sci-chemistry/gromacs:tng - Enable new trajectory format - tng
sci-chemistry/gsim:emf - Support for .emf export
sci-chemistry/icm:32bit - Automatically generated description for 32bit
sci-chemistry/icm:64bit - Automatically generated description for 64bit
sci-chemistry/jmol:client-only - Install the viewer only, no applet files for httpd
sci-chemistry/molequeue:client - Build the client application
sci-chemistry/molequeue:server - Build the serve application
sci-chemistry/molequeue:zeromq - Build with net-libs/zeromq support
sci-chemistry/mopac7:gmxmopac7 - Add support library for gromacs
sci-chemistry/pdb2pqr:opal - Add web interface via opal
sci-chemistry/pdb2pqr:pdb2pka - Install experimental pdb2pka interface
sci-chemistry/pymol:web - Install Pymodule needed for web app support
sci-chemistry/raster3d:gd - libgd support for PNG and JPEG output
sci-chemistry/vmd:cuda - Use nvidia cuda toolkit for speeding up computations
sci-chemistry/vmd:gromacs - Add support for TNG file format
sci-chemistry/vmd:msms - Add support for MSMS SAS calcualtion tool
sci-chemistry/vmd:povray - Add support for povray raytracer for HQ images
sci-chemistry/vmd:tachyon - Add support for tachyon raytracer for HQ images
sci-chemistry/votca-csg:extras - Pull in extra applications from sci-chemistry/votca-csgapps
sci-chemistry/votca-csg:gromacs - Add support for gromacs file formats through sci-chemistry/gromacs
sci-chemistry/wxmacmolplt:flash - Add support for flash movie generation using media-libs/ming
sci-electronics/geda:stroke - enable mouse gesture support
sci-electronics/gerbv:unit-mm - Set default unit for coordinates in status bar to mm
sci-electronics/gspiceui:schematics - Use sci-electronics/geda for schematics editing
sci-electronics/gspiceui:waveform - Use sci-electronics/gwave for waveform display
sci-electronics/gtkwave:fasttree - Enables experimental Fast SST Tree widget code.
sci-electronics/gtkwave:fatlines - Renders lines as double width in gtkwave.
sci-electronics/gtkwave:judy - Enables Judy array support.
sci-electronics/gtkwave:packed - Enables '#pragma pack' for data arrays (saves memory, costs time).
sci-electronics/kicad:github - Add github support into PCB editor
sci-electronics/kicad:i18n - Allow GUI internationalization through linguas_* use flags
sci-electronics/kicad:minimal - Build only binaries without parts library and examples
sci-electronics/kicad:python - Enable python scripting support
sci-electronics/pcb:gcode - gcode file export
sci-electronics/pcb:gif - GIF graphics export
sci-electronics/pcb:jpeg - JPEG graphics export
sci-electronics/pcb:m4lib-png - Enable creating png previews for the m4 library
sci-electronics/pcb:nelma - NELMA file export
sci-electronics/pcb:png - PNG graphics export
sci-electronics/pcb:tk - Build tcl/tk graphical QFP footprint generator
sci-electronics/pcb:toporouter - Build toporouter
sci-electronics/pcb:xrender - Translucent PCB display for Motif/Lesstif GUI
sci-electronics/pulseview:decode - Enable decoding of protocols while capturing
sci-electronics/sigrok-cli:decode - Enable decoding of protocols while capturing
sci-electronics/splat:hires - Builds additional high resolution application 'rfsplat-hd'.
sci-geosciences/gdal-grass:postgres - Include support for dev-db/postgresql
sci-geosciences/gmt:gdal - Enable sci-libs/gdal library support
sci-geosciences/gmt:gmtfull - Full resolution bathymetry database
sci-geosciences/gmt:gmthigh - Add high resolution bathymetry database
sci-geosciences/gmt:gmttria - Non GNU triangulation method, more efficient
sci-geosciences/gmt:metric - Use SI (cm) units instead of US (inches) ones
sci-geosciences/gmt:mex - Enable compilation of mex supplement which requires Octave/Matlab
sci-geosciences/gmt:octave - Enable octave support
sci-geosciences/googleearth:bundled-libs - Use bundled libraries.
sci-geosciences/gpsbabel:gui - Enable the graphical user interface (requires dev-qt/qtwebengine)
sci-geosciences/gpsd:dbus - export gpsd data over dbus connections
sci-geosciences/gpsd:latency_timing - support latency timing information
sci-geosciences/gpsd:ntp - Enable net-misc/ntp shared memory interface and PPS kernel support for GPS time
sci-geosciences/gpsd:shm - export gpsd over shared memory
sci-geosciences/gpsd:sockets - export gpsd over unix sockets
sci-geosciences/grass:geos - Use sci-libs/geos for v.buffer and adds extended options to the v.select module
sci-geosciences/grass:liblas - Include support for LAS and LAZ encoded LiDAR files through sci-geosciences/liblas
sci-geosciences/grass:opencl - Enable OpenCL support
sci-geosciences/gshhs:data - Add earth data with sci-geosciences/gshhs-data
sci-geosciences/liblas:gdal - Add support for the sci-libs/gdal geospatial raster library
sci-geosciences/liblas:geotiff - Add support for geo-tagged TIFF files with sci-libs/libgeotiff
sci-geosciences/mapnik:gdal - Enable sci-libs/gdal library support
sci-geosciences/mapserver:gdal - Enable sci-libs/gdal library support
sci-geosciences/mapserver:geos - Enable sci-libs/geos library support
sci-geosciences/mapserver:postgis - Enable dev-db/postgis support
sci-geosciences/mapserver:proj - Enable sci-libs/proj library support (geographic projections)
sci-geosciences/mapserver:xslt - Enable xslt and exslt support xml-mapfile support
sci-geosciences/merkaartor:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration
sci-geosciences/merkaartor:webengine - Enable dev-qt/qtwebengine in some plugins
sci-geosciences/qgis:bundled-libs - Use internal copy of x11-libs/qwtpolar
sci-geosciences/qgis:georeferencer - Determines whether georeferencer plugin should be built
sci-geosciences/qgis:grass - Add support for sci-geosciences/grass
sci-geosciences/qgis:mapserver - Determines whether mapserver should be built
sci-geosciences/qgis:spatialite - Enable Spatial DBMS over sqlite dev-db/spatialite
sci-geosciences/viking:libexif - Use media-libs/libexif for EXIF support
sci-geosciences/viking:magic - Use libmagic to determine mimetypes
sci-geosciences/viking:mapnik - Enable a layer based on sci-geosciences/mapnik
sci-geosciences/viking:sqlite - Enable MBTiles support based on dev-db/sqlite
sci-geosciences/xtide:gps - Use sci-geosciences/gpsd
sci-libs/ViSP:coin - Enables Coin3D support.
sci-libs/ViSP:demos - Installs demo programs.
sci-libs/ViSP:dmtx - Enables barcode data matrix support.
sci-libs/ViSP:ogre - Enables dev-games/ogre support.
sci-libs/ViSP:ois - Enables dev-games/ois support via ogre.
sci-libs/ViSP:opencv - Enables media-libs/opencv support.
sci-libs/ViSP:tutorials - Installs tutorials.
sci-libs/ViSP:zbar - Enables barcodes reading.
sci-libs/adolc:sparse - Add support for sparse matrix algebra with sci-libs/colpack
sci-libs/armadillo:arpack - Link with sci-libs/arpack libraries for eigen decomposition
sci-libs/armadillo:mkl - Use matrix allocation from the Intel MKL sci-libs/mkl
sci-libs/armadillo:superlu - Use SuperLU for sparse linear equation solving sci-libs/superlu
sci-libs/armadillo:tbb - Use matrix allocation from the Threads Building Blocks dev-cpp/tbb
sci-libs/arprec:qd - Use sci-libs/qd for quad-double datatype
sci-libs/atlas:generic - Build atlas assuming a fairly generic architecture (sse2 for x86, core2 for amd64)
sci-libs/avogadrolibs:static-plugins - Build all plugins statically into main plugin modules
sci-libs/avogadrolibs:vtk - include vtk support
sci-libs/ceres-solver:c++11 - Build ceres-solver using the C++11 standard
sci-libs/ceres-solver:cxsparse - Enable simple support for sparse matrix algebra from sci-libs/cxsparse with no LAPACK dependencies
sci-libs/ceres-solver:gflags - Use dev-cpp/gflags for flag parsing
sci-libs/ceres-solver:schur - Enable fixed-size schur specializations (disable if binary size is an issue)
sci-libs/ceres-solver:sparse - Enable support for sparse matrix algebra with various packages from SuiteSparse
sci-libs/cfitsio:tools - Build execs fpack, funpack, imcopy, fitscopy, listhead
sci-libs/cgnslib:legacy - Enable or disable building legacy code (3.0 compatible)
sci-libs/cgnslib:tools - A number of utility programs: cgnscheck, cgnscompress, cgnsdiff, cgnslist, cgnsnames, cgnsupdate, cgnsconvert, adf2hdf, hdf2adf.
sci-libs/chemkit:applications - Build also applications not only the libraries
sci-libs/cholmod:cuda - Use nvidia cuda toolkit for speeding up computations
sci-libs/cholmod:metis - Enable the Partition module to cholmod using sci-libs/metis
sci-libs/clblas:client - Build a command line clBLAS client program.
sci-libs/clblas:ktest - A command line tool for testing single clBLAS kernel.
sci-libs/clblas:performance - Copy performance scripts that can measure and graph performance.
sci-libs/clblast:client - Enable compilation of the clients to test and compare performance with reference libraries
sci-libs/coinor-bonmin:glpk - Undocumented USE
sci-libs/coinor-clp:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/coinor-clp:metis - Enable partitioning with sci-libs/metis
sci-libs/coinor-clp:mumps - Enable sci-libs/mumps support
sci-libs/coinor-clp:sparse - Enable support for sparse matrix with sci-libs/cholmod
sci-libs/coinor-osi:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/coinor-symphony:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/coinor-utils:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/dlib:cblas - Build with CBLAS virtual/cblas
sci-libs/dlib:cuda - Enable support for CUDA for Deep Neural Networks (cuDNN) on GPU (experimental)
sci-libs/dlib:mkl - Enable support for Intel FFT sci-libs/mkl
sci-libs/dmlc-core:s3 - Support for the Amazon Simple Storage Service
sci-libs/fftw:float - Link default library to single precision instead of double (symlinks only and fftw-2.1)
sci-libs/fftw:quad - Build quadruple precision lib
sci-libs/fftw:zbus - Adds support for ZBus cycle-counter of mips
sci-libs/flann:cuda - Enable support for nVidia CUDA
sci-libs/flann:octave - Add bindings for sci-mathematics/octave
sci-libs/gdal:armadillo - Use sci-libs/armadillo for faster TPS transform computation
sci-libs/gdal:aux_xml - Enable Portable Auxilliary Metadata generation
sci-libs/gdal:fits - Enable support for NASA's sci-libs/cfitsio library
sci-libs/gdal:geos - Add support for geometry engine (sci-libs/geos)
sci-libs/gdal:gml - Enable support for dev-libs/xerces-c C++ API
sci-libs/gdal:hdf5 - Add support for the Hierarchical Data Format v5 (sci-libs/hdf5)
sci-libs/gdal:mdb - Enable support for Microsoft Access database
sci-libs/gdal:ogdi - Enable support for the open geographic datastore interface (sci-libs/ogdi)
sci-libs/gdal:opencl - Enable OpenCL support
sci-libs/gdal:spatialite - Enable Spatial DBMS over sqlite dev-db/spatialite
sci-libs/gdal:xls - Add the dev-libs/freexl library for xls import support
sci-libs/grib_api:aec - Build with Adaptive Entropy Coding compression, needs sci-libs/libaec
sci-libs/grib_api:jasper - Use media-libs/jasper instead of media-libs/openjpeg for JPEG 2000 support
sci-libs/gsl:cblas-external - Link gsl with external cblas provided by (virtual/cblas) instead of shipped internal version
sci-libs/gsl:deprecated - Enable deprecated functions
sci-libs/hdf5:fortran2003 - Enable new features that require Fortran 2003 (http://www.hdfgroup.org/HDF5/doc/fortran/NewFeatures_F2003.pdf)
sci-libs/hdf5:hl - Enable high level API (https://support.hdfgroup.org/HDF5/doc/HL/index.html)
sci-libs/hypre:fei - Build the internal Finite Element Interface routines
sci-libs/hypre:int64 - Build the 64 bits integer library
sci-libs/ipopt:hsl - hsl
sci-libs/ipopt:mumps - Enable sci-libs/mumps support
sci-libs/lapack-reference:deprecated - Build deprecated routines
sci-libs/lemon:coin - Enable the sci-libs/coinor-clp and sci-libs/coinor-cbc graph algorithms
sci-libs/lemon:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/lemon:tools - Build additional tools
sci-libs/libccd:double - Use double precision floats.
sci-libs/libghemical:mopac7 - Use sci-chemistry/mopac7 for semi-empirical calculations
sci-libs/libghemical:mpqc - Use sci-chemistry/mpqc for quantum-mechanical calculations
sci-libs/libsc:romio - Build with support for the ROMIO MPI-IO component
sci-libs/libsigrok:ftdi - Enable drivers that need libftdi
sci-libs/libsigrok:parport - Enable drivers that are parallel (IEEE1284) based
sci-libs/libsigrok:serial - Enable drivers that are serial (RS232) based
sci-libs/libsvm:tools - Install python based tool scripts
sci-libs/linux-gpib:firmware - Install firmware
sci-libs/linux-gpib:isa - Build ISA kernel modules; from 3.12 on the setting is ignored and the decision based on the kernel configuration
sci-libs/lis:quad - Enable quadruple precision operations
sci-libs/lis:saamg - Build the Smoothed Aggregation Algebraic MultiGrid preconditioner
sci-libs/magma:fermi - Compile for GPU NVIDIA Fermi family (2.x cards)
sci-libs/magma:kepler - Compile for GPU NVIDIA Kepler family (GF 6xx cards)
sci-libs/mathgl:hdf - Add support for the Hierarchical Data Format v.4 sci-libs/hdf
sci-libs/mathgl:octave - Add bindings for sci-mathematics/octave
sci-libs/matio:sparse - Extend formats for sparse matrix (not matlab)
sci-libs/mkl:fortran95 - Installs the BLAS/LAPACK FORTRAN95 static libraries
sci-libs/mkl:int64 - Installs the 64 bits integer libraries
sci-libs/mpir:cpudetection - Enables runtime cpudetection (useful for bindist, compatability on other CPUs)
sci-libs/mumps:metis - Enable matrix ordering with METIS (sci-libs/metis, sci-libs/parmetis)
sci-libs/mumps:scotch - Enable matrix ordering with sci-libs/scotch
sci-libs/netcdf:dap - Support for remote data access with the built-in OPeNDAP client
sci-libs/netcdf:hdf - Add support for the Hierarchical Data Format v.4 sci-libs/hdf
sci-libs/netcdf:tools - Build the utilities nccopy, ncgen and ncdump
sci-libs/nlopt:octave - Add plugin for sci-mathematics/octave
sci-libs/o2scl:armadillo - Build matrix manipulation with sci-libs/armadillo
sci-libs/o2scl:eigen - Build matrix manipulation with dev-cpp/eigen
sci-libs/octomap:dynamicEDT3D - Build and install dynamicEDT3D library: A library for incrementally updatable Euclidean distance transforms in 3D.
sci-libs/opencascade:freeimage - Enable support for image i/o via media-libs/freeimage
sci-libs/opencascade:gl2ps - Use gl2ps PostScript printing library
sci-libs/opencascade:tbb - Enable multithreading with the Intel Threads Building Block dev-cpp/tbb
sci-libs/opencascade:vtk - Enable Virtualisation Toolkit
sci-libs/openfoam:opendx - Install opendx visualisation tool
sci-libs/openfoam:paraview - Enable support for paraview library
sci-libs/openfoam:src - Install source files
sci-libs/orocos_kdl:models - Build models for some well known robots.
sci-libs/p4est:romio - Build with support for the ROMIO MPI-IO component
sci-libs/p4est:vtk-binary - Enable binary vtk output. If disabled vtk files will be written in ASCII text format.
sci-libs/pastix:int64 - Build the 64 bits integer library
sci-libs/pastix:starpu - Build and link with dev-libs/starpu
sci-libs/pcl:cuda - Adds support for NVIDIA CUDA.
sci-libs/pcl:openni - Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI.
sci-libs/pcl:openni2 - Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI2 (should be preferred over openni).
sci-libs/pcl:pcap - Adds pcap file capabilities in some drivers.
sci-libs/pcl:qhull - Adds convex-hull operation support via media-libs/qhull.
sci-libs/pcl:tutorials - Builds and installs tutorials.
sci-libs/pcl:vtk - Adds support for VTK-Visualizations.
sci-libs/plplot:dynamic - Build with dynamic drivers
sci-libs/plplot:octave - Add bindings for sci-mathematics/octave
sci-libs/plplot:pdl - Add bindings for dev-perl/PDL
sci-libs/plplot:qhull - Add bindings for media-libs/qhull
sci-libs/plplot:shapefile - Enable support for ESRI shapefiles
sci-libs/rtabmap:openni2 - Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI2.
sci-libs/scikits_image:freeimage - Enable support for image i/o via media-libs/freeimage
sci-libs/scikits_image:pyamg - Enable support for algebraic solvers via dev-python/pyamg
sci-libs/scipy:sparse - Adds support for sparse solving with sci-libs/umfpack
sci-libs/scotch:int64 - Build the 64 bits integer library (needed for > 2^31 vertices)
sci-libs/scotch:tools - Build and install extra exec tools
sci-libs/shogun:R - Enable support for dev-lang/R
sci-libs/shogun:octave - Enable support for sci-mathematics/octave
sci-libs/shogun:opencl - Enable support for building against OpenCL
sci-libs/silo:silex - Build silex data browser
sci-libs/spqr:metis - Use sci-libs/metis or sci-libs/parmetis for partitioning
sci-libs/spqr:tbb - Enable multithreading with the Intel Threads Building Block dev-cpp/tbb
sci-libs/spr:root - Add sci-physics/root graphics and i/o support
sci-libs/ssm:ccp4 - Link superpose with libccp4
sci-libs/suitesparse:cuda - Enable nvidia cuda toolkit for speeding up computations
sci-libs/suitesparse:metis - Enable the Partition module to cholmod using sci-libs/metis
sci-libs/suitesparse:tbb - Enable multithreading with the Intel Threads Building Block dev-cpp/tbb
sci-libs/sundials:hypre - Build with sci-libs/hypre conditioners
sci-libs/sundials:sparse - Enable support for sci-libs/klu sparse solver
sci-libs/sundials:superlumt - Build with sci-libs/superlu_mt
sci-libs/superlu_mt:int64 - Build the 64 bits integer library
sci-libs/symengine:arb - Add support for arb (sci-mathematics/arb)
sci-libs/symengine:benchmarks - Build benchmarks
sci-libs/symengine:boost - Add support for boost integers(dev-libs/boost)
sci-libs/symengine:flint - Add support for (sci-mathematics/flint)
sci-libs/symengine:llvm - Build with LLVM
sci-libs/symengine:mpc - Add support for multiprecision complex arithmetic(dev-libs/mpc)
sci-libs/symengine:mpfr - Add support for multiprecision floating point rouding(dev-libs/mpfr)
sci-libs/taucs:cilk - Enable multithreading using dev-lang/cilk
sci-libs/umfpack:cholmod - Use sci-libs/cholmod for matrix ordering
sci-libs/vtk:R - Enable support for dev-lang/R
sci-libs/vtk:all-modules - Build all modules
sci-libs/vtk:boost - Add support for boost
sci-libs/vtk:cg - Use nvidia's cg shaders
sci-libs/vtk:gdal - Support for gdal formated data
sci-libs/vtk:imaging - Building Imaging modules
sci-libs/vtk:json - Support for json formated data
sci-libs/vtk:kaapi - Use sci-libs/xkaapi to handle smp support
sci-libs/vtk:offscreen - Offscreen rendering through OSMesa
sci-libs/vtk:rendering - Building Redering modules
sci-libs/vtk:tbb - Use dev-cpp/tbb to handle smp support
sci-libs/vtk:views - Building Views modules
sci-libs/vtk:web - Install web component
sci-libs/vtk:xdmf2 - Support for xdmf2 formated data
sci-libs/xkaapi:blas - Kaapi BLAS tasks for PLASMA
sci-libs/xkaapi:gpu - Build library for gpu threading
sci-mathematics/Macaulay2:optimization - Accept upstream's choices for -O option, i.e. -O3 almost everywhere.
sci-mathematics/agda:cpphs - Use cpphs instead of cpp.
sci-mathematics/agda:stdlib - Install the standard library.
sci-mathematics/agda:uhc - Add support for the uhc backend.
sci-mathematics/agda-stdlib:ffi - Install agda-lib-ffi for compilation using the MAlonzo backend
sci-mathematics/bertini:optimization - Accept upstream's choices for -O option.
sci-mathematics/cgal:mpfi - Enable support for multiple recision interval arithmetic via sci-libs/mpfi
sci-mathematics/cgal:ntl - Enable support for dev-libs/ntl
sci-mathematics/coq:camlp5 - Build using camlp5. This is required for some plugins like Ssreflect.
sci-mathematics/cvc3:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/cvc3:zchaff - Use the SAT solver zchaff whose copyright is owned by Princeton University and is more restrictive (see zchaff license).
sci-mathematics/e:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/flint:gc - Enable garbage collection support via dev-libs/boehm-gc
sci-mathematics/flint:ntl - Build NTL interface
sci-mathematics/form:devref - Build and install developers reference
sci-mathematics/form:doxygen - Build and install API documentation
sci-mathematics/fricas:clisp - Add support for GNU CLISP (dev-lisp/clisp)
sci-mathematics/fricas:clozurecl - Add support for Clozure Common Lisp (dev-lisp/clozurecl)
sci-mathematics/fricas:cmucl - Add support for CMU Common Lisp (dev-lisp/cmucl)
sci-mathematics/fricas:ecls - Add support for Embeddable Common Lisp (dev-lisp/ecls)
sci-mathematics/fricas:gcl - Add support for GNU Common Lisp (dev-lisp/gcl)
sci-mathematics/fricas:sbcl - Add support for Steel Bank Common Lisp (dev-lisp/sbcl)
sci-mathematics/geomview:motionaveraging - Enable experimental motion averaging technique
sci-mathematics/gmp-ecm:custom-tune - Improve performance of some operations by selecting machine-specific defaults
sci-mathematics/gmp-ecm:gwnum - Use GWNum lib where possible
sci-mathematics/gretl:R - Enable support for dev-lang/R
sci-mathematics/gsl-shell:fox - Build a x11-libs/fox GUI
sci-mathematics/isabelle:graphbrowsing - Generate theory browsing information, including HTML documents that show a theory's definition, the theorems proved in its ML file and the relationship with its ancestors and descendants.
sci-mathematics/isabelle:ledit - Use ledit for the isabelle tty line editor
sci-mathematics/isabelle:readline - Use readline (rlwrap) for the isabelle tty line editor
sci-mathematics/kodkodi:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/maxima:clisp - Compile maxima with GNU CLISP (dev-lisp/clisp)
sci-mathematics/maxima:clozurecl - Compile maxima with Clozure Common Lisp (dev-lisp/clozurecl)
sci-mathematics/maxima:cmucl - Compile maxima with CMU Common Lisp (dev-lisp/cmucl)
sci-mathematics/maxima:ecls - Compile maxima with Embeddable Common Lisp (dev-lisp/ecls)
sci-mathematics/maxima:gcl - Compile maxima with GNU Common Lisp (dev-lisp/gcl)
sci-mathematics/maxima:sbcl - Compile maxima with Steel Bank Common Lisp (dev-lisp/sbcl)
sci-mathematics/minisat:extended-solver - Build extended version of SAT solver with additional features.
sci-mathematics/msieve:ecm - Enable support for the GMP-ECM library
sci-mathematics/normaliz:extras - Install sci-mathematics/Macaulay2 and sci-mathematics/singular packages as shipped by upstream
sci-mathematics/nusmv:minisat - Enable support for MiniSat
sci-mathematics/nusmv:zchaff - Enable support for zChaff
sci-mathematics/octave:glpk - Add support for sci-mathematics/glpk for linear programming
sci-mathematics/octave:gui - Enable the graphical user interface
sci-mathematics/octave:openssl - Use dev-libs/openssl for low level hash functions
sci-mathematics/octave:qhull - Add support for media-libs/qhull, to allow `delaunay', `convhull', and related functions
sci-mathematics/octave:qrupdate - Add support for sci-libs/qrupdatefor QR and Cholesky update functions
sci-mathematics/octave:sparse - Add enhanced support for sparse matrix algebra with SuiteSparse
sci-mathematics/pari:data - Add additional data (elldata, galdata, seadata, nftables)
sci-mathematics/polymake:bliss - Enable sci-libs/bliss interface for graph and face lattice isomorphism computations.
sci-mathematics/polymake:cdd - Enable sci-libs/cddlib interface for convex hull computations (Should be kept enabled).
sci-mathematics/polymake:group - Build extension for dealing with permutation groups and symmetric objects.
sci-mathematics/polymake:libnormaliz - Build the bundled extension for lattice related computations.
sci-mathematics/polymake:libpolymake - Build the polymake library to build applications using the C++ interface.
sci-mathematics/polymake:lrs - Enable sci-libs/lrslib interface for convex hull computations.
sci-mathematics/polymake:ppl - Enable dev-libs/ppl interface for convex hull computations.
sci-mathematics/polymake:singular - Enable the interface to sci-mathematics/singular for ideal related computations.
sci-mathematics/rstudio:server - Build and install the RStudio server
sci-mathematics/rw:executable - Build the 'rw' program.
sci-mathematics/singular:boost - Compile against external boost headers (dev-libs/boost)
sci-mathematics/spass:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/unuran:prng - Use sci-mathematics/prng library
sci-mathematics/unuran:rngstreams - Use sci-mathematics/rngstreams library
sci-mathematics/yacas:doc - Generate HTML documentation
sci-mathematics/yacas:gui - Build graphical interface for the native yacas engine. Requires Qt5
sci-mathematics/yacas:java - Build the Java yacas engine and text console for it
sci-mathematics/yacas:jupyter - Add support for jupyter notebook
sci-mathematics/yafu:sieve - Use msieve for the sieving steps of NFS
sci-mathematics/z3:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-misc/boinc:cuda - Use nvidia cuda toolkit for speeding up computations. NOTE: works only for subset of nvidia graphic cards so make sure your card is supported before opening a bug about it.
sci-misc/h5utils:hdf - Build hdf to hdf5 (and vice-versa) converter
sci-misc/h5utils:octave - Build Octave plugins
sci-misc/nco:dap - Support for remote data access with the NETCDF DAP client
sci-misc/nco:ncap2 - Build next generation netcdf arithmetic processor (needs dev-java/antlr)
sci-misc/nco:udunits - Add sci-libs/udunits files support
sci-physics/bullet:bullet3 - Build Bullet 3
sci-physics/bullet:double-precision - Build libraries in double precision
sci-physics/bullet:extras - Build additional libraries
sci-physics/cernlib-montecarlo:herwig - Build Herwig internal event generator, newer version available in sci-physics/herwig
sci-physics/espresso:cuda - Enable cuda support
sci-physics/espresso:examples - Installs the examples
sci-physics/espresso:packages - Installs extra TCL subpackages
sci-physics/fastjet:cgal - Use sci-mathematics/cgal instead of bundled algorithms
sci-physics/fastjet:plugins - Build all standard and C++ plugins
sci-physics/geant:data - Add a lot of standard physics data files for geant4
sci-physics/geant:dawn - Add support for media-gfx/dawn (3D postscript rendering)
sci-physics/geant:gdml - Enable geometry markup language for xml
sci-physics/geant:geant3 - Add compatibility for geant321 to geant4
sci-physics/geant:inventor - Add support for Open Inventor SGI toolkit via Coin3D
sci-physics/geant:raytracerx - Enable raytracing for physics events
sci-physics/geant:vrml - Enable output of geant4 in vrml formats
sci-physics/hepmc:cm - Build with cm instead of default mm for length units
sci-physics/hepmc:gev - Build with GeV instead of default MeV for momentum units
sci-physics/herwig++:c++11 - Build Herwig++ using the C++11 standard. Experimental feature, not for production use.
sci-physics/herwig++:fastjet - Adds support for sci-physics/fastjet
sci-physics/hoomd-blue:cuda - Enable cuda non-bonded kernels
sci-physics/lammps:lammps-memalign - Enables the use of the posix_memalign() call instead of malloc() when large chunks or memory are allocated by LAMMPS. Aliengnment is on 16 byte boundaries.
sci-physics/lhapdf:octave - Add bindings for sci-mathematics/octave
sci-physics/pythia:fastjet - Build jets using the sci-physics/fastjet package
sci-physics/pythia:hepmc - Adds support for High Energy Physics Monte Carlo Generators sci-physics/hepmc
sci-physics/pythia:lhapdf - Support the use of external PDF sets via sci-physics/lhapdf
sci-physics/pythia:root - Use sci-physics/root trees and histograms (in examples only)
sci-physics/root:R - Enable support for dev-lang/R
sci-physics/root:c++11 - Build ROOT using the C++11 standard
sci-physics/root:c++14 - Build ROOT using the C++14 standard
sci-physics/root:fits - Support for images and data from FITS files with sci-libs/cfitsio
sci-physics/root:gdml - Enable GDML writer and reader
sci-physics/root:geocad - Enable ROOT-CAD interface using sci-libs/opencascade
sci-physics/root:http - Enable http server support including but not limited to fastcgi support
sci-physics/root:math - Build all math related libraries plugins, needs sci-libs/gsl
sci-physics/root:memstat - Build memory statistics library, helps to detect memory leaks
sci-physics/root:pythia6 - Build the interface for sci-physics/pythia version 6.x
sci-physics/root:pythia8 - Build the interface for sci-physics/pythia version 8.x
sci-physics/root:reflex - Build the reflection database for the C++ interpreter
sci-physics/root:shadow - Enable shadow authentication in rootd and proofd
sci-physics/root:table - Build libTable contrib library
sci-physics/root:xrootd - Build the interface for net-libs/xrootd
sci-physics/thepeg:c++11 - Build ThePEG using the C++11 standard. Experimental feature, not for production use.
sci-physics/thepeg:fastjet - Adds support for sci-physics/fastjet
sci-physics/thepeg:hepmc - Adds support for High Energy Physics Monte Carlo Generators sci-physics/hepmc
sci-physics/thepeg:lhapdf - Adds support for sci-physics/lhapdf
sci-physics/thepeg:rivet - Adds support for sci-physics/rivet
sci-physics/yoda:c++11 - Build using the C++11 standard
sci-physics/yoda:root - Adds support for sci-physics/root
sci-visualization/fityk:nlopt - Enable optimization with sci-libs/nlopt
sci-visualization/gnuplot:bitmap - Enable dot-matrix printers and pbm terminal
sci-visualization/gnuplot:compat - Enable backwards compatibility with version 4 syntax
sci-visualization/gnuplot:gd - Add support for media-libs/gd. Needed for GIF, JPEG, and PNG image output.
sci-visualization/gnuplot:libcerf - Enable special functions from sci-libs/libcerf
sci-visualization/gwyddion:fits - Enable FITS image import via sci-libs/cfitsio
sci-visualization/gwyddion:sourceview - Enable support for x11-libs/gtksourceview
sci-visualization/labplot:cantor - Enable support for different open-source computer algebra systems via kde-apps/cantor
sci-visualization/labplot:fits - Enable support for NASA's sci-libs/cfitsio library
sci-visualization/opendx:cdf - Add support for sci-libs/cdf data exchange format
sci-visualization/opendx:hdf - Add support for the Hierarchical Data Format (sci-libs/hdf)
sci-visualization/paraview:boost - Enable the usage of dev-libs/boost
sci-visualization/paraview:cg - Add support for nvidia's cg shaders
sci-visualization/paraview:coprocessing - Enable the coprocessing infrastructure which is mainly useful in the context of clusters
sci-visualization/paraview:development - Install development files including headers
sci-visualization/paraview:nvcontrol - Add NVCONTROL support for OpenGL options
sci-visualization/paraview:plugins - Build and install additional plugins
sci-visualization/veusz:emf - Add FITS format via dev-python/pyemf
sci-visualization/veusz:fits - Add FITS format via dev-python/astropy
sci-visualization/veusz:minuit - Use Minuit during fitting viadev-python/pyminuit
sci-visualization/veusz:vo - Add Virtual Observatory tools via dev-python/astropy
sci-visualization/visit:cgns - Builds the reader for the CFD General Notation System file format.
sci-visualization/visit:silo - Adds support for reading .silo files.
sci-visualization/visit:xdmf2 - Support for xdmf2 formated data.
sec-policy/selinux-base:open_perms - Enable the open permissions for file object classes (SELinux policy capability).
sec-policy/selinux-base:peer_perms - Enable the labeled networking peer permissions (SELinux policy capability).
sec-policy/selinux-base:ubac - Enable User Based Access Control (UBAC) in the SELinux policy
sec-policy/selinux-base:unconfined - Enable support for the unconfined SELinux module
sec-policy/selinux-base-policy:unconfined - Enable support for the unconfined SELinux policy module
sys-apps/accountsservice:elogind - Use sys-auth/elogind instead of sys-auth/consolekit for session tracking
sys-apps/accountsservice:systemd - Use sys-apps/systemd instead of sys-auth/consolekit for session tracking
sys-apps/busybox:make-symlinks - Create all the appropriate symlinks in /bin and /sbin.
sys-apps/busybox:math - Enable math support in gawk (requires libm)
sys-apps/busybox:mdev - Create the appropriate symlink in /sbin and install mdev.conf and support files
sys-apps/busybox:sep-usr - Support a separate /usr without needing an initramfs by booting with init=/ginit
sys-apps/busybox:static - Make the system rescue shell (/bin/bb) static so you can recover even when glibc is broken
sys-apps/busybox:systemd - Support systemd
sys-apps/coreutils:hostname - Build the hostname program
sys-apps/coreutils:kill - Build the kill program
sys-apps/coreutils:multicall - Build all tools into a single `coreutils` program akin to busybox to save space
sys-apps/dbus:elogind - Use sys-auth/elogind for session tracking.
sys-apps/dbus:systemd - Build with sys-apps/systemd at_console support
sys-apps/dbus:user-session - Enable user-session semantics for session bus under systemd
sys-apps/dstat:wifi - Enable wireless network functions
sys-apps/duc:X - Use X11 for the GUI instead of OpenGL. This is the recommended option
sys-apps/duc:cairo - Build support for exporting to PNG and PDF with x11-libs/cairo
sys-apps/duc:gui - Build support for a graphical client
sys-apps/duc:leveldb - Use dev-libs/leveldb as the backend
sys-apps/duc:ncurses - Build support for the ncurses client
sys-apps/duc:sqlite - Use dev-db/sqlite:3 as the backend
sys-apps/duc:tokyocabinet - Use dev-db/tokyocabinet as the backend
sys-apps/elfix:ptpax - Enable PT_PAX_FLAGS support.
sys-apps/elfix:xtpax - Enable XATTR_PAX_FLAGS support.
sys-apps/entropy-server:matter - Pull in app-admin/matter
sys-apps/etckeeper:bazaar - Support dev-vcs/bzr based repository
sys-apps/etckeeper:cron - Install cron script
sys-apps/firejail:apparmor - Enable support for custom AppArmor profiles
sys-apps/firejail:bind - Enable custom bind mounts
sys-apps/firejail:chroot - Enable chrooting to custom directory
sys-apps/firejail:contrib - Install contrib scripts
sys-apps/firejail:file-transfer - Enable file transfers between sandboxes and the host system
sys-apps/firejail:network - Enable networking features
sys-apps/firejail:network-restricted - Grant access to --interface, --net=ethXXX and --netfilter only to root user; regular users are only allowed --net=none
sys-apps/firejail:seccomp - Enable system call filtering
sys-apps/firejail:userns - Enable attaching a new user namespace to a sandbox (--noroot option)
sys-apps/firejail:x11 - Enable X11 sandboxing
sys-apps/firejail-lts:seccomp - Enable system call filtering
sys-apps/flashrom:atahpt - Highpoint (HPT) ATA/RAID controller support
sys-apps/flashrom:atapromise - Support for Promise PDC2026x (FastTrak/Ultra)
sys-apps/flashrom:atavia - Support for VIA VT6421A SATA controllers
sys-apps/flashrom:bitbang_spi - Bitbanging SPI infrastructure
sys-apps/flashrom:buspirate_spi - Enable Bus Pirate SPI programmer
sys-apps/flashrom:ch341a_spi - Enable WCH CH341A SPI programmer
sys-apps/flashrom:dediprog - Dediprog SF100 support
sys-apps/flashrom:drkaiser - Enable Dr. Kaiser programmer
sys-apps/flashrom:dummy - Enable dummy tracing
sys-apps/flashrom:ft2232_spi - Enable ftdi programmer, flashing through FTDI/SPI USB interface
sys-apps/flashrom:gfxnvidia - Enable NVIDIA programmer
sys-apps/flashrom:internal - Enable internal/onboard support
sys-apps/flashrom:internal_dmi - Enable internal DMI decoding rather than use sys-apps/dmidecode
sys-apps/flashrom:it8212 - Support for ITE IT8212F ATA/RAID controllers
sys-apps/flashrom:linux_spi - Enable support for Linux userspace spidev interface
sys-apps/flashrom:mstarddc_spi - Support for SPI flash ROMs accessible through DDC in MSTAR-equipped displays
sys-apps/flashrom:nic3com - Enable 3Com NIC programmer
sys-apps/flashrom:nicintel - Support for Intel NICs
sys-apps/flashrom:nicintel_eeprom - Support for EEPROMs on Intel Gigabit network cards
sys-apps/flashrom:nicintel_spi - Support for SPI on Intel NICs
sys-apps/flashrom:nicnatsemi - Support for National Semiconductor NICs
sys-apps/flashrom:nicrealtek - Support for Realtek NICs
sys-apps/flashrom:ogp_spi - Enable support for OGP (Open Graphics Project) SPI flashing
sys-apps/flashrom:pickit2_spi - SUpport for SPI flash ROMs accessible via Microchip PICkit2
sys-apps/flashrom:pony_spi - Enable support for SI-Prog like hardware by Lancos
sys-apps/flashrom:rayer_spi - RayeR SPIPGM hardware support
sys-apps/flashrom:satamv - Enable programmer for Marvell SATA controllers
sys-apps/flashrom:satasii - Enable programmer for SiI SATA controllers
sys-apps/flashrom:serprog - Enable Serial Flasher programmer
sys-apps/flashrom:tools - Install additional tools
sys-apps/flashrom:usbblaster - Enable support for Altera USB-Blaster dongles
sys-apps/flashrom:usbblaster_spi - Enable support for Altera USB-Blaster dongles
sys-apps/flashrom:wiki - Enable wiki informations, like supported devices etc.
sys-apps/fwupd:colorhug - Enable ColorHug support through x11-misc/colord package.
sys-apps/fwupd:dell - Enable Dell-specific support.
sys-apps/fwupd:elf - Enable libelf support through dev-libs/libelf package.
sys-apps/fwupd:man - Build and install man pages
sys-apps/fwupd:uefi - Enable UEFI support
sys-apps/fwupd:uefi_labels - Enable UEFI labels support
sys-apps/gawk:mpfr - use mpfr for high precision arithmetic (-M / --bignum)
sys-apps/gnome-disk-utility:fat - Include FAT16/FAT32 support (sys-fs/dosfstools)
sys-apps/hwdata-gentoo:binary-drivers - Adds support for ATI/NVIDIA binary drivers
sys-apps/hwids:net - Install the oui.txt and iab.txt databases
sys-apps/hwids:pci - Install the pci.ids database
sys-apps/hwids:udev - Install hwdb.d rules for udev
sys-apps/hwids:usb - Install the usb.ids database
sys-apps/hwloc:cuda - Enable CUDA device discovery
sys-apps/hwloc:gl - Enable GL display device discovery (NVCtrl)
sys-apps/hwloc:numa - Add support for numa memory allocation
sys-apps/hwloc:pci - Enable PCI device discovery using libpci
sys-apps/hwloc:plugins - Build hwloc components as plugins so that the hwloc core library does not directly depend on their dependencies (for instance the libpci library)
sys-apps/ibm-powerpc-utils:rtas - Add support for the Run Time Abstraction Services (RTAS)
sys-apps/iotools:make-symlinks - Generate sub-command symlinks to iotools -- note that a lot are simple like "xor"
sys-apps/ipmitool:openipmi - Use the system OpenIPMI implementation.
sys-apps/iproute2:iptables - include support for iptables filtering
sys-apps/irqbalance:numa - Support balancing IRQs across NUMA nodes
sys-apps/kexec-tools:booke - Include support for Book-E memory management
sys-apps/kexec-tools:lzma - Enables support for LZMA compressed kernel images
sys-apps/kexec-tools:xen - Enable extended xen support
sys-apps/kmod:lzma - Enable support for XZ compressed modules
sys-apps/kmod:tools - Install module loading/unloading tools.
sys-apps/kmod:zlib - Enable support for gzipped modules
sys-apps/linux-misc-apps:usbip - Include USB/IP binaries to replace net-misc/usbip
sys-apps/man-db:manpager - Enable manpager wrapper for colorizing output
sys-apps/memtest86:serial - Compile with serial console support
sys-apps/memtest86+:floppy - Install a script to create floppy disks containing memtest86+ binaries.
sys-apps/memtest86+:iso - Compile an ISO image
sys-apps/memtest86+:serial - Compile with serial console support
sys-apps/moreutils:perl - Install scripts written in Perl
sys-apps/net-tools:old-output - use old ifconfig output style (useful for when new output breaks scripts)
sys-apps/nix:etc_profile - Install /etc/profile.d/ entry to inject nix support for all users.
sys-apps/nix:gc - Enable garbage collection in the Nix expression evaluator (use dev-libs/boehm-gc).
sys-apps/nix:sodium - Use dev-libs/libsodium for cryptography
sys-apps/pacman:gpg - Support verifying packages signed with GPG using app-crypt/gpgme
sys-apps/paludis:pbins - Enable binary package support. Adds dependency upon app-arch/libarchive
sys-apps/paludis:pink - Use a less boring colourscheme than the default
sys-apps/paludis:search-index - Enable cave search --index. Requires dev-db/sqlite.
sys-apps/paludis:xml - Build xml things for metadata.xml and GLSA support (needs dev-libs/libxml2).
sys-apps/pciutils:dns - Enable support for querying the central database of PCI IDs using DNS
sys-apps/pciutils:kmod - Enable sys-apps/kmod support for the -k switch in lspci command
sys-apps/pciutils:zlib - Support compressed pci.ids database
sys-apps/pcmciautils:staticsocket - Add support for static sockets
sys-apps/pcsc-lite:libusb - Use dev-libs/libusb detection to hotplug new smartcard readers. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev.
sys-apps/pcsc-lite:policykit - Uses sys-auth/polkit to restrict access to smartcard readers or smartcars to given users.
sys-apps/pcsc-lite:udev - Use sys-fs/udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness.
sys-apps/pcsc-tools:network-cron - Monthly cronjob the update-smartcard_list script
sys-apps/pkgcore:doc - Build and install API docs.
sys-apps/policycoreutils:audit - Enable support for sys-process/audit and use the audit_* functions (like audit_getuid instead of getuid())
sys-apps/portage:epydoc - Build html API documentation with epydoc.
sys-apps/portage:python3 - Use python3 as Python interpreter.
sys-apps/proot:care - Build dynamic CARE binary (more info - http://reproducible.io/)
sys-apps/pyrenamer:music - Enable support for renaming music
sys-apps/qingy:consolekit - Enable native consolekit support
sys-apps/qingy:opensslcrypt - Encrypt communications between qingy and its GUI using dev-libs/openssl
sys-apps/razercfg:pm-utils - Installs the pm-utils hooks for suspend/resume and requires sys-power/pm-utils
sys-apps/razercfg:qt4 - Installs a qt UI. Requires dev-python/pyside
sys-apps/roccat-tools:input_devices_roccat_ryosmkfx - Enable support for Ryos Mk FX keyboard.
sys-apps/roccat-tools:input_devices_roccat_skeltr - Enable support for Skeltr keyboard.
sys-apps/roccat-tools:input_devices_roccat_sova - Enable support for Sova keyboard.
sys-apps/roccat-tools:input_devices_roccat_suora - Enable support for Suora keyboard.
sys-apps/s390-tools:fuse - build cmsfs-fuse to read files stored on a z/VM CMS disk
sys-apps/s390-tools:ncurses - build hyptop monitoring program
sys-apps/s390-tools:pfm - build the cpacfstats tool
sys-apps/s390-tools:zfcpdump - build the kernel disk dumping utility
sys-apps/s390-tools:zlib - build the zgetdump utility
sys-apps/selinux-python:audit - Enable support for sys-process/audit and use the audit_* functions (like audit_getuid instead of getuid())
sys-apps/shadow:audit - Enable support for sys-process/audit
sys-apps/smartmontools:minimal - Do not install the monitoring daemon and associated scripts.
sys-apps/smartmontools:update_drivedb - Install a script to update the drivedb file.
sys-apps/superiotool:pci - Support for PCI-attached "Super I/Os" (e.g. in VIA VT82686A/B).
sys-apps/systemd:apparmor - Enable AppArmor support
sys-apps/systemd:audit - Enable support for sys-process/audit
sys-apps/systemd:cryptsetup - Enable cryptsetup tools (includes unit generator for crypttab)
sys-apps/systemd:curl - Enable support for uploading journals; required to build systemd-import/systemd-pull
sys-apps/systemd:doc - Generate systemd.index.7 and systemd.directives.7
sys-apps/systemd:elfutils - Enable coredump stacktraces in the journal
sys-apps/systemd:gcrypt - Enable sealing of journal files using gcrypt; required to build systemd-import/systemd-pull
sys-apps/systemd:gnuefi - Enable EFI boot manager and stub loader (built using sys-boot/gnu-efi)
sys-apps/systemd:http - Enable embedded HTTP server in journald
sys-apps/systemd:importd - Enable import daemon
sys-apps/systemd:kdbus - Connect to kernel dbus (KDBUS) instead of userspace dbus if available
sys-apps/systemd:kmod - Enable kernel module loading via sys-apps/kmod
sys-apps/systemd:libidn2 - If IDN support is enabled, use net-dns/libidn2 instead of net-dns/libidn
sys-apps/systemd:lz4 - Enable lz4 compression for the journal
sys-apps/systemd:nat - Enable support for network address translation in networkd
sys-apps/systemd:qrcode - Enable qrcode output support in journal
sys-apps/systemd:sysv-utils - Install sysvinit compatibility symlinks and manpages for init, telinit, halt, poweroff, reboot, runlevel, and shutdown
sys-apps/systemd:vanilla - Disable Gentoo-specific behavior and compatibility quirks
sys-apps/systemd:xkb - Depend on x11-libs/libxkbcommon to allow logind to control the X11 keymap
sys-apps/tcp-wrappers:netgroups - Support matching NIS (host) netgroup names via the @netgroup syntax (if you don't know what this means, you most likely do not need it)
sys-apps/timer_entropyd:debug - Enable printf debugging and logging to the syslog at DEBUG level
sys-apps/tuxonice-userui:fbsplash - Add support for framebuffer splash
sys-apps/usb_modeswitch:jimtcl - Use dev-lang/jimtcl instead of dev-lang/tcl for smaller memory footprint
sys-apps/usermode-utilities:fuse - Build tools (currently umlmount) needing fuse
sys-apps/util-linux:caps - build setpriv helper (run programs with diff capabilities)
sys-apps/util-linux:cramfs - build mkfs/fsck helpers for cramfs filesystems
sys-apps/util-linux:fdformat - build fdformat (floppy disk format)
sys-apps/util-linux:kill - build the kill program
sys-apps/util-linux:pam - build runuser helper
sys-apps/util-linux:suid - install mount/umount as setuid so non-root users may mount/umount devices, and wall/write as setgid so non-root users can notify other users
sys-apps/util-linux:tty-helpers - install the mesg/wall/write tools for talking to local users
sys-apps/v86d:x86emu - Use x86emu for Video BIOS calls
sys-apps/watchdog:nfs - enable support for checking nfs mounts
sys-apps/xinetd:rpc - support RPC services
sys-auth/consolekit:policykit - Use the PolicyKit framework (sys-auth/polkit) to get authorization for suspend/shutdown.
sys-auth/consolekit:systemd-units - Install systemd unit files to replace the modern functionality of logind in sys-apps/systemd. Not recommended.
sys-auth/elogind:apparmor - Enable AppArmor support
sys-auth/fingerprint-gui:upekbsapi - Add UPEK BSAPI drivers for identify functions on some readers
sys-auth/keystone:memcached - Installs dependencies needed for using memcached as a backend
sys-auth/keystone:mongo - Installs dependencies needed for using mongo as a backend
sys-auth/munge:gcrypt - Use libgcrypt instead of openssl
sys-auth/nss-mdns:search-domains - Honour search domains from /etc/resolv.conf (see bug #201948 for possible side effects)
sys-auth/nss-pam-ldapd:utils - Install the command-line utilities
sys-auth/oath-toolkit:pam - Build PAM module for pluggable login authentication for OATH
sys-auth/oath-toolkit:pskc - Build tools & library for the Portable Symmetric Key Container (PSKC) format per RFC6030
sys-auth/pam_mktemp:prevent-removal - If supported, set EXT2_APPEND_FL on /tmp/.private to prevent temporary directories from being removed
sys-auth/pam_mysql:openssl - Use OpenSSL for md5 and sha1 support
sys-auth/pam_pkcs11:nss - Use Mozilla NSS (dev-libs/nss) as provider for PKCS#11 access, rather than using OpenSSL with a custom implementation of the PKC#11 protocol.
sys-auth/pam_pkcs11:pcsc-lite - Build the card_eventmanager binary used to detect card removal and lock the sessions. This needs sys-apps/pcsc-lite.
sys-auth/pam_u2f:debug - Enable debug messages using the pam logging macros. (Note: these will be visible on stdout for terminal logins).
sys-auth/pambase:consolekit - Enable pam_ck_connector module on local system logins. This allows for console logins to make use of ConsoleKit authorization.
sys-auth/pambase:cracklib - Enable pam_cracklib module on system authentication stack. This produces warnings when changing password to something easily crackable. It requires the same USE flag to be enabled on sys-libs/pam or system login might be impossible.
sys-auth/pambase:debug - Enable debug information logging on syslog(3) for all the modules supporting this in the system authentication and system login stacks.
sys-auth/pambase:gnome-keyring - Enable pam_gnome_keyring module on system login stack. This enables proper Gnome Keyring access to logins, whether they are done with the login shell, a Desktop Manager or a remote login systems such as SSH.
sys-auth/pambase:kerberos - Enable pam_krb5 module on system auth stack, as an alternative to pam_unix. If Kerberos authentication succeed, only pam_unix will be ignore, and all the other modules will proceed as usual, including Gnome Keyring and other session modules. It requires sys-libs/pam as PAM implementation.
sys-auth/pambase:minimal - Disables the standard PAM modules that provide extra information to users on login; this includes pam_tally (and pam_tally2 for Linux PAM 1.1 and later), pam_lastlog, pam_motd and other similar modules. This might not be a good idea on a multi-user system but could reduce slightly the overhead on single-user non-networked systems.
sys-auth/pambase:mktemp - Enable pam_mktemp module on system auth stack for session handling. This module creates a private temporary directory for the user, and sets TMP and TMPDIR accordingly.
sys-auth/pambase:passwdqc - Enable pam_passwdqc module on system auth stack for password quality validation. This is an alternative to pam_cracklib producing warnings, rejecting or providing example passwords when changing your system password. It is used by default by OpenWall GNU/*/Linux and by FreeBSD.
sys-auth/pambase:sha512 - Switch Linux-PAM's pam_unix module to use sha512 for passwords hashes rather than MD5. This option requires >=sys-libs/pam-1.0.1 built against >=sys-libs/glibc-2.7, if it's built against an earlier version, it will silently be ignored, and MD5 hashes will be used. All the passwords changed after this USE flag is enabled will be saved to the shadow file hashed using SHA512 function. The password previously saved will be left untouched. Please note that while SHA512-hashed passwords will still be recognised if the USE flag is removed, the shadow file will not be compatible with systems using an earlier glibc version.
sys-auth/pambase:ssh - Enable pam_ssh module on system auth stack for authentication and session handling. This module will accept as password the passphrase of a private SSH key (one of ~/.ssh/id_rsa, ~/.ssh/id_dsa or ~/.ssh/identity), and will spawn an ssh-agent instance to cache the open key.
sys-auth/passwdqc:utils - Install pwqcheck and pwqgen helper utilities
sys-auth/polkit:elogind - Use sys-auth/elogind instead of sys-auth/consolekit for session tracking
sys-auth/polkit:systemd - Use sys-apps/systemd instead of sys-auth/consolekit for session tracking
sys-auth/sssd:acl - Build and use the cifsidmap plugin
sys-auth/sssd:augeas - Build internal configuration library
sys-auth/sssd:autofs - Build helper to let net-fs/autofs use sssd provided information
sys-auth/sssd:locator - Install sssd's Kerberos plugin
sys-auth/sssd:manpages - Build man pages with dev-libs/libxslt
sys-auth/sssd:netlink - Add support for netlink protocol via dev-libs/libnl
sys-auth/sssd:nfsv4 - Add support for the nfsv4 idmapd plugin provided by net-libs/libnfsidmap
sys-auth/sssd:ssh - Build helper to let net-misc/openssh use sssd provided information
sys-auth/sssd:sudo - Build helper to let app-admin/sudo use sssd provided information
sys-auth/ykpers:consolekit - Use sys-auth/consolekit and virtual/udev to allow access to the YubiKey HID device to the console user.
sys-block/f3:extra - Build the additional f3probe, f3brew and f3fix utility (requires sys-block/parted and virtual/udev)
sys-block/fio:aio - Enable AIO ioengine
sys-block/fio:glusterfs - Enable GlusterFS gfapi support via sys-cluster/glusterfs
sys-block/fio:gnuplot - Install tools for generating gnuplots
sys-block/fio:numa - Enable numa support
sys-block/fio:rbd - Enable Rados block device support via sys-cluster/ceph
sys-block/fio:rdma - Enable infiniband support via sys-fabric/librdmacm
sys-block/gparted:btrfs - Include Btrfs support (sys-fs/btrfs-progs)
sys-block/gparted:cryptsetup - Include LUKS volume support (sys-fs/cryptsetup)
sys-block/gparted:dmraid - Support for dmraid devices, also known as ATA-RAID, or Fake RAID.
sys-block/gparted:f2fs - Include F2FS support (sys-fs/f2fs-tools)
sys-block/gparted:fat - Include FAT16/FAT32 support (sys-fs/dosfstools)
sys-block/gparted:hfs - Include HFS support (sys-fs/hfsutils)
sys-block/gparted:jfs - Include JFS support (sys-fs/jfsutils)
sys-block/gparted:mdadm - Support for Linux software RAID.
sys-block/gparted:ntfs - Include NTFS support (sys-fs/ntfs3g)
sys-block/gparted:reiser4 - Include ReiserFS4 support (sys-fs/reiser4progs)
sys-block/gparted:reiserfs - Include ReiserFS support (sys-fs/reiserfsprogs)
sys-block/gparted:xfs - Include XFS support (sys-fs/xfsprogs, sys-fs/xfsdump)
sys-block/open-iscsi:rdma - Support iSCSI over RDMA
sys-block/open-iscsi:tcp - Support iSCSI over TCP
sys-block/parted:debug - Enable debugging as encouraged by upstream: [The default configuration] includes --enable-debug (by default), which contains many assertions. Obviously, these "waste" space, but in the past, they have caught potentially dangerous bugs before they would have done damage, so we think it's worth it. Also, it means we get more bug reports ;)
sys-block/parted:device-mapper - Enable device-mapper support from sys-fs/lvm2 in parted
sys-block/partimage:nologin - Do not include login support when connecting partimaged
sys-block/sas2ircu:efi - Install EFI variant as well
sys-block/sas3ircu:efi - Install EFI variant as well
sys-block/tgt:fcoe - Add support for FCoE protocol
sys-block/tgt:fcp - Add support for new FC protocol
sys-block/tgt:ibmvio - Add support for IBM Virtual I/O
sys-block/tgt:rbd - Add support for ceph block devices
sys-boot/grub:binfont - Install a pre-generated binary font
sys-boot/grub:mkfont - Enables support for grub-mkfont
sys-boot/lilo:device-mapper - Enable support for device-mapper from sys-fs/lvm2
sys-boot/lilo:minimal - Do not install the dolilo helper script
sys-boot/lilo:pxeserial - Avoid character echo on PXE serial console
sys-boot/plymouth:gdm - Enables smooth transition to GDM
sys-boot/plymouth:libkms - Provides abstraction to the DRM drivers (intel, nouveau and vmwgfx at this moment)
sys-boot/plymouth:pango - Adds support for printing text on splash screen and text prompts, e.g. for password
sys-boot/refind:btrfs - Construire le gestionnaire EFI pour le système de fichier btrfs
sys-boot/refind:ext2 - Construire le gestionnaire EFI pour le système de fichier ext2
sys-boot/refind:ext4 - Construire le gestionnaire EFI pour le système de fichier ext4
sys-boot/refind:gnuefi - Compiler en utilisant GNU-EFI au lieu de Tianocore
sys-boot/refind:hfs - Construire le gestionnaire EFI pour le système de fichier hfs
sys-boot/refind:iso9660 - Construire le gestionnaire EFI pour le système de fichier iso9660
sys-boot/refind:ntfs - Construire le gestionnaire EFI pour le système de fichier ntfs
sys-boot/refind:reiserfs - Construire le gestionnaire EFI pour le système de fichier reiserfs
sys-cluster/ceph:babeltrace - Add support for LTTng babeltrace
sys-cluster/ceph:cephfs - Build support for cephfs, a POSIX compatible filesystem built on top of ceph
sys-cluster/ceph:cryptopp - Use dev-libs/crypto++ for cryptography
sys-cluster/ceph:fuse - Build fuse client
sys-cluster/ceph:jemalloc - Use dev-libs/jemalloc for allocations
sys-cluster/ceph:libaio - Use libaio as asynchronous input/output library
sys-cluster/ceph:libatomic - Use libatomic instead of builtin atomic operations
sys-cluster/ceph:lttng - Add support for LTTng
sys-cluster/ceph:nss - Use dev-libs/nss for cryptography
sys-cluster/ceph:radosgw - Add radosgw support
sys-cluster/ceph:xfs - Add xfs support
sys-cluster/ceph:zfs - Add zfs support
sys-cluster/charm:ampi - Build implementation of MPI on top of Charm++
sys-cluster/charm:charmdebug - Enable the charm debugger
sys-cluster/charm:charmproduction - Optimize performance of Charm++ runtime
sys-cluster/charm:charmtracing - Enable tracing support in Charm++
sys-cluster/charm:cmkopt - Enable CMK optimisation
sys-cluster/charm:mlogft - Compile with Charm++ message logging fault tolerance support
sys-cluster/charm:numa - Support memory affinity with NUMA
sys-cluster/charm:syncft - Compile with Charm++ fault tolerance support
sys-cluster/charm:tcp - Use TCP (instead of UPD) for socket communication
sys-cluster/cinder:api - Installs the initscripts for the cinder api service
sys-cluster/cinder:iscsi - Allow using an iSCSI remote storage server as pool for disk image storage
sys-cluster/cinder:lvm - Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage
sys-cluster/cinder:memcached - Installs the memcached server
sys-cluster/cinder:rdma - Enable rdma storage backend support
sys-cluster/cinder:scheduler - Installs the initscripts for the cinder scheduler service
sys-cluster/cinder:tcp - Enables tcp support for the iscsi backend
sys-cluster/cinder:tgt - Enable tgt storage backend support
sys-cluster/cinder:volume - Installs the initscripts for the cinder volume service
sys-cluster/cluster-glue:libnet - Force use of net-libs/libnet
sys-cluster/corosync:infiniband - Enable Infiniband RDMA transport support
sys-cluster/drbd:heartbeat - Enable Heartbeat integration
sys-cluster/drbd:pacemaker - Enable Pacemaker integration
sys-cluster/drbd:xen - Enable Xen integration
sys-cluster/drbd-utils:heartbeat - Enable Heartbeat integration
sys-cluster/drbd-utils:pacemaker - Enable Pacemaker integration
sys-cluster/drbd-utils:xen - Enable Xen integration
sys-cluster/galera:garbd - Install Galera Arbitrator - a stateless daemon which acts as a lightweight group member
sys-cluster/gearmand:memcache - Support memcache daemon (via dev-libs/libmemcached) for the queue storage.
sys-cluster/gearmand:tokyocabinet - Support dev-db/tokyocabinet for the queue storage.
sys-cluster/glusterfs:bd-xlator - Enable the blockdevice translator (requires sys-fs/lvm2)
sys-cluster/glusterfs:crypt-xlator - Enable the encryption translator
sys-cluster/glusterfs:fuse - Add FUSE mount helper
sys-cluster/glusterfs:georeplication - Enable support for georeplication (requires dev-lang/python)
sys-cluster/glusterfs:glupy - Enable support for translators written in Python
sys-cluster/glusterfs:infiniband - Add support for Infiniband ibverbs transport. Libraries can be found in science overlay
sys-cluster/glusterfs:qemu-block - Transparently create files as QCow2/QED images in the backend, including the possibility to snapshot.
sys-cluster/glusterfs:rsyslog - Install configuration snippet for app-admin/rsyslog
sys-cluster/glusterfs:systemtap - Enable support for dev-util/systemtap
sys-cluster/glusterfs:tiering - Enable support for data classification/tiering (requires dev-db/sqlite SLOT 3)
sys-cluster/heat:memcached - Installs the memcached server
sys-cluster/hpx:jemalloc - Use dev-libs/jemalloc for memory allocation
sys-cluster/hpx:papi - Use dev-libs/papi for NaCl
sys-cluster/hpx:perftools - Use dev-util/google-perftools for memory allocation
sys-cluster/hpx:tbb - Use dev-cpp/tbb for memory allocation
sys-cluster/legion:gasnet - Enable GASNet lib support
sys-cluster/legion:hwloc - Enable HWLoc lib support
sys-cluster/maui:pbs - Enable pbs integration
sys-cluster/maui:slurm - Enable slurm integration
sys-cluster/moosefs:cgi - Install CGI server and scripts.
sys-cluster/moosefs:fuse - Install the mfsmount utility.
sys-cluster/mpich:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/mpich:romio - Build the ROMIO MPI-IO component
sys-cluster/mpich2:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/mpich2:romio - Enable romio, a high-performance portable MPI-IO implementation
sys-cluster/mvapich2:large-cluster - Automatically generated description for large-cluster
sys-cluster/mvapich2:medium-cluster - Automatically generated description for medium-cluster
sys-cluster/mvapich2:romio - Automatically generated description for romio
sys-cluster/neutron:compute-only - Only install things needed on compute hosts
sys-cluster/neutron:dhcp - Installs the initscripts for the neutron dhcp service
sys-cluster/neutron:l3 - Installs the initscripts for the neutron l3 agent service
sys-cluster/neutron:linuxbridge - Installs the initscripts for the neutron linuxbridge agent service
sys-cluster/neutron:metadata - Installs the initscripts for the neutron metadata agent service
sys-cluster/neutron:openvswitch - Installs the initscripts for the neutron openvswitch agent service
sys-cluster/neutron:server - Installs the initscripts for the neutron server service
sys-cluster/nova:compute - Installs the initscripts for the nova volume service
sys-cluster/nova:compute-only - only install stuff needed for a compute host
sys-cluster/nova:iscsi - Installs iscsi helper udev scripts
sys-cluster/nova:memcached - Installs the memcached server
sys-cluster/nova:novncproxy - Installs the initscripts for the nova novncproxy service
sys-cluster/nova:openvswitch - Installs openvswitch for the neutron openvswitch support
sys-cluster/nova:rabbitmq - Installs the rabbitmq server
sys-cluster/ocfs:aio - Add aio support
sys-cluster/openmpi:cma - Enable the CMA (Cross Memory Attach) MCA
sys-cluster/openmpi:cuda - Add GPU direct support
sys-cluster/openmpi:heterogeneous - Enable features required for heterogeneous platform support
sys-cluster/openmpi:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/openmpi:numa - Enable numactl to allow binding processes to CPUs
sys-cluster/openmpi:pbs - Add support for the Portable Batch System (PBS)
sys-cluster/openmpi:romio - Build the ROMIO MPI-IO component
sys-cluster/openmpi:vt - Enable bundled VampirTrace support
sys-cluster/openstack-meta:cinder - Installs Openstack Cinder
sys-cluster/openstack-meta:glance - Installs Openstack Glance
sys-cluster/openstack-meta:heat - Installs Openstack Heat
sys-cluster/openstack-meta:keystone - Installs Openstack Keystone
sys-cluster/openstack-meta:neutron - Installs Openstack Neutron
sys-cluster/openstack-meta:nova - Installs Openstack Nova
sys-cluster/openstack-meta:swift - Installs Openstack Swift
sys-cluster/pacemaker:cman - Enable sys-cluster/cman support.
sys-cluster/pacemaker:heartbeat - Enable sys-cluster/heartbeat support.
sys-cluster/pacemaker:smtp - Enable SMTP support via net-libs/libesmtp
sys-cluster/resource-agents:libnet - Force use of net-libs/libnet
sys-cluster/resource-agents:rgmanager - Install resources for sys-cluster/rgmanager
sys-cluster/singularity:slurm - Compile spank plugin for sys-cluster/slurm
sys-cluster/slurm:multiple-slurmd - Allow multiple slurmd to run
sys-cluster/slurm:munge - Enable authentication via munge
sys-cluster/slurm:torque - Enable perl scripts that emulates pbs (qstat, qsub etc.)
sys-cluster/swift:account - adds swift account support
sys-cluster/swift:container - adds swift container support
sys-cluster/swift:memcached - adds memcached support
sys-cluster/swift:object - adds swift object support
sys-cluster/swift:proxy - adds swift proxy support
sys-cluster/torque:autorun - Enable the AUTORUN_JOBS codebase
sys-cluster/torque:cgroups - Enable pbs_mom to use linux cgroups to isolate jobs
sys-cluster/torque:cpusets - Enable pbs_mom to utilize linux cpusets if available
sys-cluster/torque:drmaa - Enable the Distributed Resource Management Application API
sys-cluster/torque:munge - Enable authentication via munge
sys-cluster/torque:nvidia - Enable management of Nvidia GPUs
sys-cluster/torque:quickcommit - Enable the QUICKCOMMIT codebase
sys-cluster/torque:server - Enable compilation of pbs_server and pbs_sched
sys-devel/autogen:libopts - install the libopts tarball (a few packages want this for developing)
sys-devel/binutils-apple:libcxx - Add support for libcxx
sys-devel/binutils-apple:lto - Add support for Link-Time Optimization with LLVM
sys-devel/binutils-apple:multitarget - Compile for non-standard target architectures (ppc and ppc64) -- experimental, Gentoo only
sys-devel/binutils-hppa64:multitarget - Adds support to binutils for cross compiling (does not work with gas)
sys-devel/clang:default-compiler-rt - Use compiler-rt instead of libgcc as the default rtlib for clang
sys-devel/clang:default-libcxx - Use libc++ instead of libstdc++ as the default stdlib for clang
sys-devel/clang:multitarget - Build all host targets (default: host only)
sys-devel/clang:static-analyzer - Install the Clang static analyzer
sys-devel/clang-runtime:compiler-rt - Install sys-libs/compiler-rt for -rtlib=compiler-rt
sys-devel/clang-runtime:libcxx - Install sys-libs/libcxx for -stdlib=libc++
sys-devel/clang-runtime:openmp - Install sys-libs/libomp for -fopenmp support
sys-devel/clang-runtime:sanitize - Enable compiler-rt sanitizer (-fsanitize*) support
sys-devel/distcc:crossdev - Enable support for sys-devel/crossdev
sys-devel/distcc:gssapi - Enable support for net-libs/libgssglue
sys-devel/gcc:d - Enable support for the D programming language
sys-devel/gcc:default - After building, set this compiler as default using gcc-config
sys-devel/gcc:fixed-point - Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)
sys-devel/gcc:graphite - Add support for the framework for loop optimizations based on a polyhedral intermediate representation
sys-devel/gcc:ip28 - Enable building a compiler capable of building a kernel for SGI Indigo2 Impact R10000 (IP28)
sys-devel/gcc:ip32r10k - Enable building a compiler capable of building an experimental kernel for SGI O2 w/ R1x000 CPUs (IP32)
sys-devel/gcc:libffi - Build the portable foreign function interface library
sys-devel/gcc:mudflap - Add support for mudflap, a pointer use checking library
sys-devel/gcc:n32 - Enable n32 ABI support on mips
sys-devel/gcc:n64 - Enable n64 ABI support on mips
sys-devel/gcc:nopie - Disable PIE support (NOT FOR GENERAL USE)
sys-devel/gcc:nossp - Disable SSP support (NOT FOR GENERAL USE)
sys-devel/gcc:objc - Build support for the Objective C code language
sys-devel/gcc:objc++ - Build support for the Objective C++ language
sys-devel/gcc:objc-gc - Build support for the Objective C code language Garbage Collector
sys-devel/gcc-apple:objc - Build support for the Objective C code language
sys-devel/gcc-apple:objc++ - Build support for the Objective C++ language
sys-devel/gcc-apple:regression-test - Run the testsuite and install the results (requires FEATURES=test)
sys-devel/gdb:client - Install the main "gdb" program (most people want this)
sys-devel/gdb:lzma - Support lzma compression in ELF debug info
sys-devel/gdb:multitarget - Support all known targets in one gdb binary
sys-devel/gdb:python - Enable support for the new internal scripting language, as well as extended pretty printers
sys-devel/gdb:server - Install the "gdbserver" program (useful for embedded/remote targets)
sys-devel/gdb:xml - Support parsing XML data files needed (at least) for cpu features, memory maps, and syscall tracing
sys-devel/gettext:cvs - When running `autopoint`, use cvs to store the internal development files; this requires cvs at runtime, but will be faster/smaller than raw archives
sys-devel/gettext:git - When running `autopoint`, use git to store the internal development files; this requires git at runtime, but will be faster/smaller than raw archives
sys-devel/kgcc64:regression-test - Run the testsuite and install the results (requires FEATURES=test)
sys-devel/llvm:clang - Build the clang C/C++ compiler
sys-devel/llvm:default-compiler-rt - Use compiler-rt instead of libgcc as the default rtlib for clang
sys-devel/llvm:default-libcxx - Use libc++ instead of libstdc++ as the default stdlib for clang
sys-devel/llvm:doc - Build and install the HTML documentation and regenerate the man pages
sys-devel/llvm:gold - Build the gold linker plugin
sys-devel/llvm:lldb - Build the lldb debugger
sys-devel/llvm:multitarget - Build all host targets (default: host only)
sys-devel/llvm:ncurses - Support querying terminal properties using ncurses' terminfo
sys-devel/llvm:sanitize - Build compiler-rt's sanitizers
sys-devel/llvm:static-analyzer - Install the Clang static analyzer (requires USE=clang)
sys-devel/sparse:gtk - Build the test-inspect utility (requires x11-libs/gtk+ version 2)
sys-devel/sparse:llvm - Build the sparse-llvm utility
sys-devel/sparse:xml - Build the c2xml utility (requires dev-libs/libxml2).
sys-fabric/ofed:dapl - Add support for DAPL abstraction layer
sys-fabric/ofed:diags - Add dignostic tools for infiniband
sys-fabric/ofed:ibacm - Add support for userspace pre-connection services
sys-fabric/ofed:mstflint - Tools to burn Mellanox firmware
sys-fabric/ofed:opensm - Add OpenSM - Subnet manager for infiniband
sys-fabric/ofed:perftest - Add perftest utils
sys-fabric/ofed:qperf - Add rdma tests
sys-fabric/ofed:rds - Tools to manage rds sockets
sys-fabric/ofed:srp - Suport for userspace part for srp initiator
sys-fabric/opensm:tools - Install ssld extra tool
sys-firmware/edk2-ovmf:binary - Use pre-built binaries
sys-firmware/intel-microcode:initramfs - install a small initramfs for use with CONFIG_MICROCODE_EARLY
sys-firmware/intel-microcode:monolithic - install the large text microcode.dat (used by older kernels via microcode_ctl)
sys-firmware/intel-microcode:split-ucode - install the split binary ucode files (used by the kernel directly)
sys-firmware/ipxe:efi - Build an EFI program for using PXE
sys-firmware/ipxe:iso - Build a bootable ISO for using PXE
sys-firmware/ipxe:lkrn - Build a linux kernel bootable file for using with grub/etc...
sys-firmware/ipxe:qemu - Build the required PXE ROM images for app-emulation/qemu
sys-firmware/ipxe:undi - Build a Universal Network Device Interface driver chainloading your existing PXE NIC into iPXE
sys-firmware/ipxe:usb - Build a bootable USB image for using PXE
sys-firmware/ipxe:vmware - Build the PXE ROM images that VMWare uses
sys-firmware/seabios:binary - Use official upstream pre-built binaries
sys-firmware/seabios:seavgabios - Include SeaVGABIOS binaries (replacement for vgabios)
sys-firmware/sigrok-firmware-fx2lafw:binary - Use official upstream pre-built binaries
sys-firmware/vgabios:binary - Use official upstream pre-built binaries (only default and cirrus images)
sys-freebsd/boot0:tftp - Enable PXE/TFTP boot support.
sys-freebsd/boot0:zfs - Enable booting on ZFS filesystems.
sys-freebsd/freebsd-lib:hesiod - Enable support for net-dns/hesiod
sys-freebsd/freebsd-lib:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-lib:zfs - Enable ZFS support.
sys-freebsd/freebsd-rescue:netware - Build tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-rescue:zfs - Enable ZFS support.
sys-freebsd/freebsd-sbin:ipfilter - Build tools to administer the ipfilter firewall.
sys-freebsd/freebsd-sbin:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-sbin:pf - Build tools to administer the PF firewall.
sys-freebsd/freebsd-share:isdn - Enable ISDN support
sys-freebsd/freebsd-share:zfs - Enable ZFS support.
sys-freebsd/freebsd-sources:build-kernel - Build and install a kernel (recommended).
sys-freebsd/freebsd-sources:dtrace - Enable DTrace support.
sys-freebsd/freebsd-sources:zfs - Enable ZFS support.
sys-freebsd/freebsd-ubin:ar - Build FreeBSD's ar and ranlib replacements based on libarchive. The toolchain will still use binutils' version but you can play with it. They have been renamed to freebsd-ar and freebsd-ranlib not to collide with binutils.
sys-freebsd/freebsd-ubin:audit - Build auditing tools.
sys-freebsd/freebsd-ubin:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-ubin:zfs - Enable ZFS support (for fstat actually).
sys-freebsd/freebsd-usbin:audit - Build auditing tools.
sys-freebsd/freebsd-usbin:floppy - Enable floppy disk utilities (fdcontrol, fdformat, fdread, fdwrite).
sys-freebsd/freebsd-usbin:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-usbin:zfs - Enable ZFS support.
sys-fs/aufs3:debug - Enable additional debugging support
sys-fs/aufs3:fuse - Enable fuse support
sys-fs/aufs3:hfs - Enable hfs support
sys-fs/aufs3:inotify - Enable inotify support
sys-fs/aufs3:kernel-patch - Patch the current kernel for aufs3 support
sys-fs/aufs3:nfs - Enable support for nfs export
sys-fs/aufs3:pax_kernel - Apply patch needed for pax enabled kernels
sys-fs/aufs3:ramfs - Enable initramfs/rootfs support
sys-fs/aufs4:debug - Enable additional debugging support
sys-fs/aufs4:fuse - Enable fuse support
sys-fs/aufs4:hfs - Enable hfs support
sys-fs/aufs4:inotify - Enable inotify support
sys-fs/aufs4:kernel-patch - Patch the current kernel for aufs3 support
sys-fs/aufs4:nfs - Enable support for nfs export
sys-fs/aufs4:pax_kernel - Apply patch needed for pax enabled kernels
sys-fs/aufs4:ramfs - Enable initramfs/rootfs support
sys-fs/btrfs-progs:convert - Build ext2 conversion utility (btrfs-convert)
sys-fs/btrfs-progs:static - Build static binaries in addition to the dynamic ones
sys-fs/cryfs:update-check - Enable automatic checking for updates and security vulnerabilities
sys-fs/cryptsetup:gcrypt - Use dev-libs/libgcrypt crypto backend
sys-fs/cryptsetup:kernel - Use kernel crypto backend (mainly for embedded systems)
sys-fs/cryptsetup:nettle - Use dev-libs/nettle crypto backend
sys-fs/cryptsetup:openssl - Use dev-libs/openssl crypto backend
sys-fs/cryptsetup:pwquality - Use dev-libs/libpwquality for password quality checking
sys-fs/cryptsetup:reencrypt - Build cryptsetup-reencrypt
sys-fs/cryptsetup:urandom - Use /dev/urandom instead of /dev/random
sys-fs/dmraid:dietlibc - Compile against dev-libs/dietlibc
sys-fs/dmraid:intel_led - Enable Intel LED support
sys-fs/dmraid:klibc - Compile against dev-libs/klibc
sys-fs/dmraid:led - Enable LED support
sys-fs/dmraid:mini - Create a minimal binary suitable for early boot environments
sys-fs/dosfstools:compat - Install symlinks for legacy names of the tools
sys-fs/e2fsprogs:fuse - Build fuse2fs, a FUSE file system client for ext2/ext3/ext4 file systems
sys-fs/ecryptfs-utils:gpg - Enable app-crypt/gnupg key module
sys-fs/ecryptfs-utils:openssl - Enable dev-libs/openssl key module
sys-fs/ecryptfs-utils:pkcs11 - Enable PKCS#11 (Smartcards) key module
sys-fs/ecryptfs-utils:tpm - Enable support for Trusted Platform Module (TPM) using app-crypt/trousers
sys-fs/ext4magic:expert-mode - Builds ext4magic with expert mode. Highly useful in recovering data from a corrupted filesystem
sys-fs/ext4magic:file-attr - Enable the recovery of file attributes (append, immutable, nodump etc)
sys-fs/lessfs:filelog - Enable the ability to log to a file instead of syslog
sys-fs/lessfs:memtrace - Enable leefs to create a report regarding the memory allocation. This feature should be used for debugging purposes to avoid performance degradation
sys-fs/lessfs:snappy - Enable snappy compression using the app-arch/snappy library
sys-fs/loop-aes:cpu_flags_x86_padlock - Use VIA padlock instructions, detected at run time, code still works on non-padlock processors
sys-fs/loop-aes:extra-ciphers - Enable extra ciphers
sys-fs/loop-aes:keyscrub - Protects the encryption key in memory but takes more cpu resources
sys-fs/lvm2:clvm - Allow users to build clustered lvm2
sys-fs/lvm2:cman - Cman support for clustered lvm
sys-fs/lvm2:lvm1 - Allow users to build lvm2 with lvm1 support
sys-fs/lvm2:nolvmstatic - Allow users to build lvm2 dynamically
sys-fs/mtpfs:mad - Enable handling of MP3's metadata
sys-fs/multipath-tools:rbd - Enable Rados block device support via sys-cluster/ceph
sys-fs/ntfs3g:external-fuse - Use external FUSE library instead of internal one. Must be disabled for unprivileged mounting to work.
sys-fs/ntfs3g:ntfsdecrypt - Build and install the ntfsdecrypt application.
sys-fs/ntfs3g:ntfsprogs - Include internal version of ntfsprogs.
sys-fs/ocfs2-tools:external - Enable external locking
sys-fs/owfs:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
sys-fs/owfs:ftpd - Enable building the OWFS FTP server (owftpd)
sys-fs/owfs:fuse - Enable building the FUSE-based OWFS client (owfs)
sys-fs/owfs:httpd - Enable building the OWFS web server (owhttpd)
sys-fs/owfs:parport - Enable support for the DS1410E parallel port adapter
sys-fs/owfs:zeroconf - Enables support for zero-configuration networking via net-dns/avahi
sys-fs/quota:netlink - Compile daemon receiving quota messages via netlink
sys-fs/quota:rpc - Enable quota interaction via RPC
sys-fs/squashfs-tools:lz4 - Enable support for LZ4 compression using app-arch/lz4
sys-fs/squashfs-tools:xz - Enable support for XZ ("LZMA2") compression using app-arch/xz-utils
sys-fs/squashfuse:lz4 - Enable support for lz4 compression
sys-fs/udev:firmware-loader - Enable the userspace firmware loader (DEPRECATED, replaced by the in-kernel loader starting from 3.8)
sys-fs/udev:gudev - Build the gobject interface library
sys-fs/udev:kmod - Enable kernel module loading/unloading support using sys-apps/kmod
sys-fs/udisks:cryptsetup - Enable sys-fs/cryptsetup support
sys-fs/udisks:elogind - Use sys-auth/elogind for session tracking
sys-fs/udisks:gptfdisk - Pull in sys-apps/gptfdisk for sgdisk command as used by partitioning functionality
sys-fs/udisks:lvm - Add support for Logical Volume Management via sys-fs/lvm2.
sys-fs/udisks:remote-access - Control whether connections from other clients over LAN are allowed
sys-fs/udisks:systemd - Support sys-apps/systemd's logind
sys-fs/zfs:kernel-builtin - Disable dependency on sys-fs/zfs-kmod under the assumption that ZFS is part of the kernel source tree
sys-fs/zfs:rootfs - Enable dependencies required for booting off a pool containing a rootfs
sys-fs/zfs:test-suite - Install regression test suite
sys-fs/zfs-kmod:rootfs - Install zfs-shutdown script to support exporting a pool containing rootfs
sys-kernel/aufs-sources:experimental - Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".
sys-kernel/aufs-sources:module - Patch kernel to allow aufs being build as a module.
sys-kernel/aufs-sources:vanilla - Use vanilla kernel sources without applying genpatches. WARNING: This flag will drop all support from the Gentoo Kernel Security team
sys-kernel/ck-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/debian-sources:binary - Builds and installs kernel automatically
sys-kernel/debian-sources:rt - Applies the CONFIG_PREEMPT_RT patch series
sys-kernel/dracut:debug - Module installing additional tools like strace, file editor, ssh and more
sys-kernel/genkernel-next:cryptsetup - Enable support for Luks disk enrcyption using sys-fs/cryptsetup
sys-kernel/genkernel-next:dmraid - Enable support for DMRAID (include dmraid dependency)
sys-kernel/genkernel-next:gpg - Enable support for GPG (include gnupg dependency)
sys-kernel/genkernel-next:iscsi - Enable support for open-iscsi (include open-iscsi dependency)
sys-kernel/genkernel-next:mdadm - Enable support for mdadm (include mdadm dependency)
sys-kernel/genkernel-next:plymouth - Enable support for Plymouth (include Plymouth dependency)
sys-kernel/gentoo-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/gentoo-sources:experimental - Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".
sys-kernel/hardened-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/linux-docs:html - Install HTML documentation
sys-kernel/linux-firmware:savedconfig - Allows individual selection of firmware files
sys-kernel/mips-sources:experimental - Apply experimental (80xx) patches.
sys-kernel/mips-sources:ip27 - Enables additional support for SGI Origin (IP27)
sys-kernel/mips-sources:ip28 - Enables additional support for SGI Indigo2 Impact R10000 (IP28)
sys-kernel/mips-sources:ip30 - Enables support for SGI Octane (IP30, 'Speedracer')
sys-kernel/rt-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/spl:debug-log - Enable additional diagnostics
sys-kernel/tuxonice-sources:experimental - Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".
sys-libs/binutils-libs:64-bit-bfd - Support 64-bit targets even on 32-bit hosts (is ignored on 64-bit hosts)
sys-libs/binutils-libs:multitarget - Enable all possible targets in libbfd
sys-libs/compiler-rt:clang - Force building using installed clang (rather than the default CC/CXX).
sys-libs/db:rpc - Enable rpc client/server
sys-libs/freeipmi:nagios - Install a nagios plugin to check sensors' status.
sys-libs/gdbm:berkdb - enable compatibility layer for UNIX-like dbm and ndbm interfaces
sys-libs/gdbm:exporter - enable gdbmexport binary for exporting data from gdbm-1.8 databases into gdbm-1.9
sys-libs/glibc:glibc-compat20 - Enable the glibc-compat addon
sys-libs/glibc:glibc-omitfp - Configure glibc with --enable-omitfp which lets the build system determine when it is safe to use -fomit-frame-pointer
sys-libs/glibc:nptlonly - Disables building the linuxthreads fallback in glibc ebuilds that support building both linuxthread and nptl
sys-libs/gwenhywfar:fox - Use x11-libs/fox graphical toolkit
sys-libs/libblockdev:bcache - Enable block device cache support.
sys-libs/libblockdev:dmraid - Support for dmraid devices, also known as ATA-RAID, or Fake RAID.
sys-libs/libblockdev:kbd - Enable kernel block device support.
sys-libs/libblockdev:lvm - Enable support for Logical Volume Management via sys-fs/lvm2.
sys-libs/libcxx:libcxxabi - Build on top of sys-libs/libcxxabi instead of gcc's libsupc++ (avoids depending on gcc).
sys-libs/libcxx:libcxxrt - Build on top of sys-libs/libcxxrt instead of gcc's libsupc++ (avoids depending on gcc).
sys-libs/libcxx:libunwind - Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependence on gcc.
sys-libs/libcxxabi:libunwind - Use libunwind instead of libgcc_s for stack unwinding, thus avoiding dependency on gcc
sys-libs/libcxxrt:libunwind - Use libunwind instead of libgcc_s for unwinding. This should allow avoiding relying on sys-devel/gcc but for now clang is setup to use libgcc_s.
sys-libs/libhugetlbfs:perl - Install the cpupcstat tool and some perl modules
sys-libs/libomp:hwloc - Enable CPU affinity support via hwloc
sys-libs/libomp:ompt - Enable OpenMP Tools Interface support
sys-libs/libselinux:pcre2 - Use dev-libs/libpcre2 for fcontext regexes
sys-libs/libunwind:debug-frame - Adds support for DWARF .debug_frame section: Use the information from this section if available
sys-libs/libunwind:libatomic - Use libatomic instead of builtin atomic operations
sys-libs/musl-nscd:minimal - Only installs the header files
sys-libs/ncurses:ada - Add bindings for the ADA programming language
sys-libs/ncurses:tinfo - Build curses library (libncurses) sep from the low-level terminfo library (libtinfo) -- usually needed only for binary packages -- but it is binary compatible in either mode
sys-libs/ncurses:trace - Enable test trace() support in ncurses calls
sys-libs/pam:audit - Enable support for sys-process/audit
sys-libs/pam:berkdb - Build the pam_userdb module, that allows to authenticate users against a Berkeley DB file. Please note that enabling this USE flag will create a PAM module that links to the Berkeley DB (as provided by sys-libs/db) installed in /usr/lib and will thus not work for boot-critical services authentication.
sys-libs/pam:cracklib - Build the pam_cracklib module, that allows to verify the chosen passwords' strength through the use of sys-libs/cracklib. Please note that simply enabling the USE flag on this package will not make use of pam_cracklib by default, you should also enable it in sys-auth/pambase as well as update your configuration files.
sys-libs/readline:utils - Install rlfe (ReadLine Front-End) helper tool -- a wrapper program for making any stdin use readline
sys-libs/talloc:compat - Enable extra compatibility stuff
sys-libs/timezone-data:leaps_timezone - Install the set of "right" timezones; these timezones include leap seconds when counting seconds since the epoch (while POSIX does not) as they are based on the TAI (International Atomic Time) clock
sys-libs/uclibc:rpc - Enable sun nis/rpc support (you should use libtirpc though)
sys-libs/uclibc:savedconfig - Adds support for user defined configs
sys-libs/uclibc:ssp - Force the use of ssp to be built into a hardened uclibc setup
sys-libs/uclibc:uclibc-compat - Build uclibc with backwards compatible options
sys-libs/uclibc:wordexp - Add support for word expansion (wordexp.h)
sys-libs/uclibc-ng:rpc - Enable sun nis/rpc support (you should use libtirpc though)
sys-libs/uclibc-ng:symlink-compat - Explicitly add sym links for libdl.so.0, libm.so.0, and friends for backward compatibility with sys-libs/uclibc-ng-1.0.17 and earlier
sys-libs/zlib:minizip - include the minizip library for quick and dirty zip extraction
sys-power/apcupsd:modbus - enable MODBUS support over USB
sys-power/cpupower:cpufreq_bench - Build and install the cpufreq_bench binary
sys-power/nut:ipmi - Support IPMI-based UPSes.
sys-power/nut:ups_drivers_al175 - Driver for Eltek UPS models with AL175 alarm module
sys-power/nut:ups_drivers_apcsmart - Driver for American Power Conversion Smart Protocol UPS equipment
sys-power/nut:ups_drivers_apcsmart-old - Driver for American Power Conversion Smart Protocol UPS equipment
sys-power/nut:ups_drivers_apcupsd-ups - Driver for apcupsd client access
sys-power/nut:ups_drivers_bcmxcp - Driver for UPSes supporting the serial BCM/XCP protocol
sys-power/nut:ups_drivers_bcmxcp_usb - Experimental driver for UPSes supporting the BCM/XCP protocol over USB
sys-power/nut:ups_drivers_belkin - Driver for Belkin serial UPS equipment
sys-power/nut:ups_drivers_belkinunv - Driver for Belkin "Universal UPS" and compatible
sys-power/nut:ups_drivers_bestfcom - Driver for Best Power Fortress/Ferrups
sys-power/nut:ups_drivers_bestfortress - Driver for old Best Fortress UPS equipment
sys-power/nut:ups_drivers_bestuferrups - Driver for Best Power Micro-Ferrups
sys-power/nut:ups_drivers_bestups - Driver for Best Power / SOLA (Phoenixtec protocol) UPS equipment
sys-power/nut:ups_drivers_blazer_ser - Driver for Megatec/Q1 protocol serial based UPS equipment
sys-power/nut:ups_drivers_blazer_usb - Driver for Megatec/Q1 protocol USB based UPS equipment
sys-power/nut:ups_drivers_clone - Fake driver to clone outlets for device grouping
sys-power/nut:ups_drivers_clone-outlet - Fake driver to clone outlets for device grouping
sys-power/nut:ups_drivers_dummy-ups - Driver for multi-purpose UPS emulation
sys-power/nut:ups_drivers_etapro - Driver for ETA UPS equipment
sys-power/nut:ups_drivers_everups - Driver for Ever UPS models
sys-power/nut:ups_drivers_gamatronic - Driver for Gamatronic UPS equipment
sys-power/nut:ups_drivers_genericups - Driver for contact-closure UPS equipment
sys-power/nut:ups_drivers_isbmex - Driver for ISBMEX UPS equipment
sys-power/nut:ups_drivers_ivtscd - driver for the IVT Solar Controller Device
sys-power/nut:ups_drivers_liebert - Driver for Liebert contact-closure UPS equipment
sys-power/nut:ups_drivers_liebert-esp2 - Driver for Liebert UPS, using the ESP-II serial protocol
sys-power/nut:ups_drivers_masterguard - Driver for Masterguard UPS equipment
sys-power/nut:ups_drivers_metasys - Driver for Meta System UPS equipment
sys-power/nut:ups_drivers_mge-shut - Driver for SHUT Protocol UPS equipment
sys-power/nut:ups_drivers_mge-utalk - Driver for MGE UPS SYSTEMS UTalk protocol equipment
sys-power/nut:ups_drivers_microdowell - Driver for Microdowell Enterprise UPS series
sys-power/nut:ups_drivers_netxml-ups - Driver for Eaton / MGE Network Management Card / Proxy (XML/HTTP Protocol) equipment
sys-power/nut:ups_drivers_nut-ipmipsu - Driver for IPMI Power Supply Units (PSU)
sys-power/nut:ups_drivers_nutdrv_qx - Driver for Q* protocol serial and USB based UPS equipment
sys-power/nut:ups_drivers_oldmge-shut - Driver for SHUT Protocol UPS equipment (older implementation)
sys-power/nut:ups_drivers_oneac - Driver for Oneac UPS equipment
sys-power/nut:ups_drivers_optiups - Driver for Opti-UPS (Viewsonic) UPS and Zinto D (ONLINE-USV) equipment
sys-power/nut:ups_drivers_powercom - UPS driver for serial Powercom/Trust/Advice UPS equipment
sys-power/nut:ups_drivers_powerpanel - Driver for PowerPanel Plus compatible UPS equipment
sys-power/nut:ups_drivers_rhino - Driver for Brazilian Microsol RHINO UPS equipment
sys-power/nut:ups_drivers_richcomm_usb - Driver UPS equipment using Richcomm dry-contact to USB solution
sys-power/nut:ups_drivers_riello_ser - Driver for Riello UPS Protocol UPS equipment
sys-power/nut:ups_drivers_riello_usb - Driver for Riello UPS Protocol UPS equipment via USB
sys-power/nut:ups_drivers_safenet - Driver for SafeNet compatible UPS equipment
sys-power/nut:ups_drivers_snmp-ups - Multi-MIB Driver for SNMP UPS equipment
sys-power/nut:ups_drivers_solis - Driver for Brazilian Microsol SOLIS UPS equipment
sys-power/nut:ups_drivers_tripplite - Driver for Tripp-Lite SmartPro UPS equipment
sys-power/nut:ups_drivers_tripplite_usb - Driver for older Tripp Lite USB UPSes (not PDC HID)
sys-power/nut:ups_drivers_tripplitesu - Driver for Tripp-Lite SmartOnline (SU) UPS equipment
sys-power/nut:ups_drivers_upscode2 - Driver for UPScode II compatible UPS equipment
sys-power/nut:ups_drivers_usbhid-ups - Driver for USB/HID UPS equipment
sys-power/nut:ups_drivers_victronups - Driver for IMV/Victron UPS unit Match, Match Lite, NetUps
sys-power/nvclock:gtk - Install the GTK+ based graphical interface
sys-power/nvclock:nvcontrol - Add NVCONTROL support for OpenGL options
sys-power/phctool:sudo - Enable support for sudo to run gui from non-root user
sys-power/pm-utils:ntp - Install support for net-misc/ntp
sys-power/powermgmt-base:pm-utils - Adds support for on_ac_power through sys-power/pm-utils
sys-power/sispmctl:gemplug - Install gemplug (management script)
sys-power/suspend:crypt - Allows suspend and resume from encrypted disk
sys-power/suspend:fbsplash - Add support for framebuffer splash
sys-process/audit:gssapi - Enable GSSAPI support
sys-process/criu:setproctitle - Make process titles of service workers to be more verbose
sys-process/cronie:anacron - Install the periodic anacron command scheduler.
sys-process/cronie:inotify - Enable inotify filesystem monitoring support.
sys-process/fcron:debug - Enable debug code and output. Since version 3.0.5 this will no longer force foreground execution, and fcron will be able to run as a service properly.
sys-process/fcron:mta - Enable mta support for sending emails from fcron
sys-process/fcron:pam - Enable PAM support for fcron. This means that fcron will pass through the "fcron" stack before executing the jobs, and fcrontab will use the "fcrontab" stack to authenticate the user before editing its crontab file.
sys-process/fcron:system-crontab - Set up fcron to respect /etc/crontab and /etc/cron.d. If this flag is disabled, /etc/cron.d and /etc/crontab will be ignored, but /etc/cron.{hourly,daily,weekly,monthly} will still be respected.
sys-process/htop:oom - Add column to track the OOM-killer score of processes
sys-process/htop:openvz - Enable openvz support
sys-process/htop:vserver - Enable vserver support
sys-process/lsof:rpc - support looking up RPC service info
sys-process/procps:kill - Build the kill program
sys-process/procps:modern-top - Enables new startup defaults of top. Keeps old defaults if disabled
sys-process/procps:ncurses - Build programs that use ncurses: top, slabtop, watch
sys-process/systemd-cron:cron-boot - Include support for the boot timer.
sys-process/systemd-cron:etc-crontab-systemd - Use dedicated /etc/crontab-systemd instead of parsing /etc/crontab
sys-process/systemd-cron:minutely - Support /etc/cron.minutely
sys-process/systemd-cron:setgid - Compile setgid C helper for crontab. Needs GCC or Clang.
sys-process/systemd-cron:yearly - Support /etc/cron.yearly
sys-process/tini:args - Enable argument parsing.
virtual/mpi:romio - Enable romio, a high-performance portable MPI-IO
virtual/mysql:embedded - Build embedded server (libmysqld)
virtual/podofo-build:boost - Add support for boost
virtual/podofo-build:tools - Build and install commandline tools.
virtual/ssh:minimal - Prefer net-misc/dropbear over net-misc/openssh
virtual/wine:d3d9 - Enable Ixit's Gallium Nine Patchset
virtual/wine:staging - Enable Wine-Staging's Patchset
www-apache/mod_backtrace:unwind - Use sys-libs/libunwind to provide better resolution of function names.
www-apache/mod_extract_forwarded:mod_proxy - Enable support for Apache's internal proxy
www-apache/mod_musicindex:archive - Add archive support
www-apache/mod_musicindex:cache - Add File cache support
www-apache/mod_musicindex:mysql - Add MySQL cache support
www-apache/mod_nss:ecc - enable Elliptical Curve Cyptography
www-apache/mod_perl:ithreads - Build for use with thread-capable perl, needs same setting as in dev-lang/perl
www-apache/mod_security:fuzzyhash - Support fuzzy hash computations (to detect malware, for example) using the app-crypt/ssdeep package.
www-apache/mod_security:geoip - Pull in dev-libs/geoip for use by the SecGeoLookupDb directive.
www-apache/mod_security:jit - Add support for the PCRE Just-in-Time optimisation, as enabled by dev-libs/libpcre with jit USE flag enabled. Might not be available on hardened systems.
www-apache/mod_security:json - Suppose JSON in the request body parser through dev-libs/yajl.
www-apache/mod_security:mlogc - Build and install the ModSecurity Audit Log Collector (mlogc).
www-apache/pwauth:domain-aware - Ignore leading domain names in username (Windows compat)
www-apache/pwauth:faillog - Log failed login attempts
www-apache/pwauth:ignore-case - Ignore string case in username (mostly Windows compat)
www-apps/ampache:transcode - Install optional dependencies for transcoding support
www-apps/blohg:git - Enable Git support
www-apps/blohg:mercurial - Enable Mercurial support
www-apps/bugzilla:extras - Optional Perl modules
www-apps/bugzilla:modperl - Enable www-apache/mod_perl support
www-apps/cgit:highlight - Enable source code highlighting
www-apps/cgit:jit - If the lua flag is enabled, jit uses LuaJIT instead of vanilla Lua
www-apps/cgit:lua - Enable support for Lua scripting
www-apps/drupal:accelerator - Add dependency on a php accelerator
www-apps/drupal:uploadprogress - Install dev-php/pecl-uploadprogress package
www-apps/gitit:network-uri - Get Network.URI from the network-uri package.
www-apps/gitit:plugins - enables optional plugin runtime loader
www-apps/guacamole:noauth - enable support for leaving out any authentication on the webinterface
www-apps/icingaweb2:nginx - Adds support for nginx
www-apps/ikiwiki:extras - Installs additional modules used by ikiwiki plugins
www-apps/klaus:ctags - Enable support for Exuberant ctags; makes all source code symbols hyperlinks to their definitions
www-apps/nikola:assets - Support web asset management through dev-python/assets
www-apps/nikola:charts - Support chart generation through dev-python/pygal
www-apps/nikola:ghpages - Add support for direct uploading to github pages thru dev-python/ghp-import
www-apps/nikola:hyphenation - Add hyphenation support through dev-python/pyphen
www-apps/nikola:ipython - Add IPython notebook compilation and LESS support
www-apps/nikola:jinja - Add support for dev-python/jinja as alternative templating engine to Mako
www-apps/nikola:markdown - Add support for Markdown as alternative markup language to reStructuredText
www-apps/nikola:watchdog - Use dev-python/watchdog to monitor file system events
www-apps/nikola:webmedia - Use dev-python/micawber to extract metadata from web media links
www-apps/nikola:websocket - Add websocket support thru dev-python/ws4py
www-apps/otrs:mod_perl - Provide all dependencies for use of mod_perl instead of cgi
www-apps/postfixadmin:vacation - Install vacation.pl script and dependencies
www-apps/redmine:markdown - Enable support for Markdown
www-apps/redmine:passenger - Enable support for www-apache/passenger
www-apps/rt:lighttpd - Add www-servers/lighttpd support
www-apps/sitebar:plugins - Install optional plugins
www-apps/sugarcrm:json - Add JSON (JavaScript Object Notation) support
www-apps/trac:highlight - Enable syntax highlighting
www-apps/trac:i18n - Enable support for i18n with dev-python/Babel
www-apps/trac:restructuredtext - Enable support for reStructuredText for wiki formatting
www-apps/tt-rss:daemon - Install additional init scripts for automated RSS updates
www-apps/venus:django - Support for django template style to config files
www-apps/venus:genshi - Support for genshi style to config files
www-apps/venus:redland - Enable support for Redland RDF
www-apps/viewvc:cvsgraph - Add dev-vcs/cvsgraph support to show graphical views of revisions and branches
www-apps/viewvc:mod_wsgi - Add www-apache/mod_wsgi support
www-apps/viewvc:pygments - Add dev-python/pygments support for syntax highlighting
www-apps/webdavcgi:rcs - Adds support for a revision controlled backend with RCS (dev-vcs/rcs)
www-apps/wordpress:akismet - Installs Akismet comment spam plug-in
www-apps/wordpress:themes - Installs themes (including default theme)
www-client/chromium:component-build - Split build into more shared libraries to speed up linking. Mostly intended for debugging and development, NOT RECOMMENDED for general use.
www-client/chromium:gconf - Enable support for GConf to retrieve system settings
www-client/chromium:gtk3 - Use gtk3 instead of gtk2
www-client/chromium:hangouts - Enable support for Google Hangouts features such as screen sharing
www-client/chromium:pic - Disable optimized assembly code that is not PIC friendly
www-client/chromium:proprietary-codecs - Enable proprietary codecs like H.264, MP3
www-client/chromium:suid - Build the SUID sandbox, which is only needed on CONFIG_USER_NS=n kernels
www-client/chromium:system-ffmpeg - Use system ffmpeg instead of the bundled one
www-client/chromium:system-icu - Use system icu instead of the bundled one
www-client/chromium:system-libvpx - Use system libvpx instead of the bundled one
www-client/chromium:tcmalloc - Use bundled tcmalloc instead of system malloc
www-client/chromium:widevine - Unsupported closed-source DRM capability (required by Netflix VOD)
www-client/dooble:qt4 - Build using qt4 instead of qt5
www-client/elinks:bittorrent - Enable support for the BitTorrent protocol
www-client/elinks:finger - Enable support for the finger protocol
www-client/elinks:gc - Enable garbage collection support via dev-libs/boehm-gc
www-client/elinks:gopher - Enable support for the gopher protocol
www-client/elinks:mouse - Make elinks to grab all mouse events
www-client/elinks:xml - Enable support for bookmarks via dev-libs/expat
www-client/epiphany:nss - Import passwords from older gecko based www-client/epiphany keyring.
www-client/firefox:bindist - Disable official Firefox branding (icons, name) which are not binary-redistributable according to upstream.
www-client/firefox:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
www-client/firefox:gmp-autoupdate - Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles
www-client/firefox:gtk2 - Use the cairo-gtk2 rendering engine
www-client/firefox:hwaccel - Force-enable hardware-accelerated rendering (Mozilla bug 594876)
www-client/firefox:jemalloc - Enable or disable jemalloc
www-client/firefox:jemalloc3 - Enable or disable jemalloc3 (forced-on when supported prior to 38.0)
www-client/firefox:nsplugin - Enable support for NPAPI plugins other than flash
www-client/firefox:pgo - Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time.
www-client/firefox:rust - Enable support for using rust compiler (experimental)
www-client/firefox:system-cairo - Use the system-wide x11-libs/cairo instead of bundled.
www-client/firefox:system-harfbuzz - Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled.
www-client/firefox:system-icu - Use the system-wide dev-libs/icu instead of bundled.
www-client/firefox:system-jpeg - Use the system-wide media-libs/libjpeg-turbo instead of bundled.
www-client/firefox:system-libevent - Use the system-wide dev-libs/libevent instead of bundled.
www-client/firefox:system-libvpx - Use the system-wide media-libs/libvpx instead of bundled.
www-client/firefox:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
www-client/google-chrome:plugins - Add system plugins path to launcher
www-client/google-chrome-beta:plugins - Add system plugins path to launcher
www-client/google-chrome-unstable:plugins - Add system plugins path to launcher
www-client/links:libevent - Enable dev-libs/libevent support
www-client/lynx:gnutls - Use gnutls library for HTTPS support (openssl is the default library for HTTPS support).
www-client/lynx:ssl - Enable HTTPS support.
www-client/midori:granite - Enable support for the elementary library dev-libs/granite
www-client/midori:zeitgeist - Add support for Zeitgeist event tracking system
www-client/netsurf:bmp - BMP bitmap image support (media-libs/libnsbmp)
www-client/netsurf:duktape - Use duktape.org javascript engine
www-client/netsurf:fbcon_frontend_able - Use framebuffer frontend able
www-client/netsurf:fbcon_frontend_linux - Use framebuffer frontend linux
www-client/netsurf:fbcon_frontend_sdl - Use framebuffer frontend sdl
www-client/netsurf:fbcon_frontend_vnc - Use framebuffer frontend vnc
www-client/netsurf:fbcon_frontend_x - Use framebuffer frontend X
www-client/netsurf:gtk - Build GTK GUI, defaults to GTK3
www-client/netsurf:gtk2 - Build GTK2 GUI
www-client/netsurf:gtk3 - Build GTK3 GUI
www-client/netsurf:pdf-writer - PDF output support (media-libs/libharu)
www-client/netsurf:psl - Use public suffix list via media-libs/libnspsl
www-client/netsurf:rosprite - RISC OS Sprite bitmap image support (media-libs/librosprite)
www-client/netsurf:svgtiny - SVG image support via media-libs/svgatiny instead of gnome-base/librsvg
www-client/netsurf:webp - WebP image support (media-libs/libwebp)
www-client/opera:gtk - Install support libraries and runtime dependencies to support GTK+/GNOME desktop integration
www-client/opera:kde - Install support libraries and runtime dependencies to support KDE desktop integration
www-client/qupzilla:kwallet - Enable encrypted storage of passwords with kde-frameworks/kwallet
www-client/qupzilla:nonblockdialogs - Enable fancy non-blocking JavaScript dialogs shown inside the page, not blocking the application window. When closing browser windows with open dialogs, this can crash the application.
www-client/qutebrowser:webengine - Install packages required for experimental rendering support with webengine.
www-client/seamonkey:calendar - Build Mozilla's calendar
www-client/seamonkey:chatzilla - Build Mozilla's IRC client (default on)
www-client/seamonkey:custom-optimization - Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)
www-client/seamonkey:force-gtk3 - Use the cairo-gtk3 rendering engine
www-client/seamonkey:gmp-autoupdate - Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles
www-client/seamonkey:gtk3 - Use the cairo-gtk3 rendering engine
www-client/seamonkey:ipc - Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes
www-client/seamonkey:jemalloc - Enable or disable jemalloc
www-client/seamonkey:roaming - Build roaming extension support (default on)
www-client/seamonkey:skia - Enable the SKIA engine for 2D rendering as an alternative to cairo
www-client/seamonkey:system-cairo - Use the system-wide x11-libs/cairo instead of bundled.
www-client/seamonkey:system-harfbuzz - Use the system-wide media-libs/harfbuzz instead of bundled.
www-client/seamonkey:system-icu - Use the sytem-wide dev-libs/icu instead of bundled.
www-client/seamonkey:system-jpeg - Use the system-wide media-libs/libjpeg-turbo instead of bundled.
www-client/seamonkey:system-libevent - Use the system-wide dev-libs/libevent instead of bundled.
www-client/seamonkey:system-libvpx - Use the system-wide media-libs/libvpx instead of bundled.
www-client/seamonkey:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
www-client/surf:savedconfig - Without a saved config.h, this package depends on net-misc/curl and x11-terms/st for a default download mechanism
www-client/uget:aria2 - Enable support for net-misc/aria2 through xmlrpc. You'll find the plugin in the app's settings.
www-client/uget:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
www-client/uget:hide-temp-files - Make temporary files that are used while downloading hidden.
www-client/w3m:lynxkeymap - If you prefer Lynx-like key binding
www-client/weboob:fast-libs - Enable fast libs
www-client/weboob:secure-updates - Enable secure updates
www-misc/gurlchecker:json - Enable support for parsing Google Chrome and derivatives bookmarks.
www-misc/gurlchecker:sqlite - Enable support for parsing Firefox and derivatives bookmarks.
www-misc/litmus:libproxy - Support for automatic proxy configuratino management through net-libs/libproxy.
www-misc/litmus:libxml2 - Use dev-libs/libxml2 to parse XML
www-misc/litmus:pkcs11 - Support for PKCS #11 through PaKChoiS (dev-libs/pakchois).
www-misc/monitorix:apcupsd - Make use of a daemon that controls APC UPSes with sys-power/apcupsd.
www-misc/monitorix:httpd - Enables the CGI webserver with any package that satisfies virtual/httpd-cgi.
www-misc/monitorix:postfix - Analyze postfix logs with net-mail/pflogsumm.
www-misc/shellinabox:pam - Enable PAM support.
www-misc/vdradmin-am:vdr - Support for media-video/vdr. Disable this if the VDR you want to control runs at a remote machine.
www-misc/xxv:themes - Enable more themes via x11-themes/xxv-skins
www-misc/zoneminder:curl - Enable using net-misc/curl for streaming from cameras
www-misc/zoneminder:gcrypt - ...
www-misc/zoneminder:vlc - Enable using media-libs/vlc for streaming from cameras
www-plugins/adobe-flash:nsplugin - Install the Netscape Flash API plugin (for Firefox and similar browsers)
www-plugins/adobe-flash:ppapi - Install the Pepper Flash API plugin (for Chrome and similar browsers)
www-plugins/chrome-binary-plugins:widevine - Install the Widevine DRM library
www-plugins/freshplayerplugin:gles2 - Use system GLESv2 libraries instead of ANGLE for shader translation
www-plugins/freshplayerplugin:gtk3 - Build with GTK+ 3 instead of GTK+ 2
www-plugins/freshplayerplugin:v4l - Use libv4l2 for colorspace conversion
www-plugins/gnash:agg - Rendering based on the Anti-Grain Geometry Rendering Engine library
www-plugins/gnash:cygnal - Enable building of the cygnal server
www-plugins/gnash:dump - Enable dump output module for creating video from SWF
www-plugins/gnash:egl - Enable EGL support for the OpenVG, OpenGL and X11 renderers
www-plugins/gnash:harden - Enable upstream recommended hardening build flags (may conflict with system ones)
www-plugins/gnash:jemalloc - Use dev-libs/jemalloc for allocations
www-plugins/gnash:openvg - Rendering based on the OpenVG graphics acceleration API
www-plugins/gnash:sdl-sound - Enable SDL audio output for the standalone player
www-plugins/gnash:ssh - Enable using SSH for network authentication in libnet
www-plugins/gnash:ssl - Enable directly using OpenSSL in libnet (not needed for nsplugin ssl support)
www-plugins/lightspark:gles - Replace default OpenGL renderer with GLESv2
www-plugins/lightspark:ppapi - Install the PPAPI plugin (for Chromium)
www-plugins/lightspark:rtmp - Enable Real Time Messaging Protocol using librtmp
www-servers/apache:apache2_modules_access_compat - Group authorizations based on host (name or IP address). Available as a compatibility module with previous versions.
www-servers/apache:apache2_modules_authn_core - Provides core authentication capabilities common to all authentication providers (functionality provided by authn_alias in previous versions).
www-servers/apache:apache2_modules_authz_core - Provides core authorization capabilities to various authorization/authorization modules, such as authn_file and authz_user.
www-servers/apache:apache2_modules_authz_dbd - Provides authorization capabilities via SQL database so that authenticated users can be allowed or denied access to portions of the web site by group membership.
www-servers/apache:apache2_modules_cache_disk - Disk based storage module for the HTTP caching filter (similar to mem_cache in previous versions).
www-servers/apache:apache2_modules_cache_socache - Shared object cache (socache) based storage module for the HTTP caching filter.
www-servers/apache:apache2_modules_http2 - Enable http2/alpn module
www-servers/apache:apache2_modules_lbmethod_bybusyness - Pending request counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_byrequests - Request counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_bytraffic - Weighted traffic counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_heartbeat - Heartbeat traffic counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_macro - Macros for the Apache config file.
www-servers/apache:apache2_modules_proxy_fcgi - FCGI support module for mod_proxy.
www-servers/apache:apache2_modules_proxy_html - Module to rewrite links in html pages behind a reverse proxy
www-servers/apache:apache2_modules_proxy_wstunnel - Provides support for the tunnelling of web socket connections to a backend websockets server.
www-servers/apache:apache2_modules_ratelimit - Ratelimit module for transfer rate management
www-servers/apache:apache2_modules_remoteip - Remotip module for logging
www-servers/apache:apache2_modules_slotmem_shm - Slot-based shared memory provider.
www-servers/apache:apache2_modules_socache_shmcb - A shared object cache provider using a high-performance cyclic buffer inside a shared memory segment.
www-servers/apache:apache2_modules_unixd - Basic (required) security for Unix-family platforms.
www-servers/apache:apache2_modules_xml2enc - Enable xml2 encoding module
www-servers/apache:static - Link in apache2 modules statically rather then plugins
www-servers/apache:suexec - Install suexec with apache
www-servers/cherokee:admin - Install web based cherokee conf tool
www-servers/cherokee:rrdtool - Enable rrdtool support
www-servers/fnord:auth - Enable HTTP authentication support
www-servers/gatling:diet - Compile against dev-libs/dietlibc
www-servers/h2o:mruby - Enable support for mruby
www-servers/hiawatha:cache - Enable caching of content
www-servers/hiawatha:monitor - Pull in www-apps/hiawatha-monitor
www-servers/hiawatha:rewrite - Enable the rewrite toolkit
www-servers/hiawatha:rproxy - Enable reverse proxy support
www-servers/hiawatha:ssl - Enable TLS support via net-libs/mbedtls
www-servers/hiawatha:tomahawk - Enable Tomahawk control server
www-servers/hiawatha:xslt - Enable XSLT support. This is also needed for directory listings
www-servers/lighttpd:libev - Enable fdevent handler
www-servers/lighttpd:mmap - Use mmap with files owned by lighttpd. This is a dangerous option as it may allow local users to trigger SIGBUS crashes.
www-servers/lighttpd:rrdtool - Enable rrdtool support via mod_rrdtool
www-servers/lighttpd:webdav - Enable webdav properties
www-servers/monkeyd:debug - Enable lots of debugging info
www-servers/monkeyd:static-plugins - Build statically linked plugins
www-servers/pound:dynscaler - Enable dynamic rescaling of back-end priorities
www-servers/pshs:magic - Enable automatic detection of Content-Type using libmagic (sys-apps/file)
www-servers/pshs:netlink - Use libnetlink (sys-apps/iproute2) to get network interface addresses
www-servers/pshs:qrcode - Enable generating QRCodes for server URL
www-servers/resin:admin - Enable Resin admin webapp
www-servers/tomcat:extra-webapps - Build also the docs and examples webapp
www-servers/tomcat:websockets - Builds websockets api and implementation (requires java 7)
www-servers/uwsgi:embedded - Embed plugins instead of building them as real plugins. When disabling this USE flag make sure you specify all used plugins in your uWSGI configuration. Note: Language plugins will always be built as real plugins.
www-servers/uwsgi:go - Build the gccgo plugin to run Go applications.
www-servers/uwsgi:jemalloc - Use dev-libs/jemalloc instead of libc's malloc
www-servers/uwsgi:json - Support json as a configuration file format.
www-servers/uwsgi:pypy - Build the pypy plugin to run your code using virtual/pypy.
www-servers/uwsgi:python_asyncio - Use the EXPERIMENTAL asyncio (tulip) for python3.4 async request dispatching and as LoopEngine (see http://uwsgi-docs.readthedocs.org/en/latest/asyncio.html).
www-servers/uwsgi:python_gevent - Use dev-python/gevent for async request dispatching and as LoopEngine (see http://projects.unbit.it/uwsgi/wiki/Gevent).
www-servers/uwsgi:routing - Enable routing support
www-servers/uwsgi:yajl - Use dev-libs/yajl instead of dev-libs/jansson for parsing JSON configuration files (if USe=json is set)
www-servers/uwsgi:yaml - Support yaml as a configuration file format.
www-servers/uwsgi:zeromq - Enable logging and deployment via ZeroMQ.
www-servers/varnish:jemalloc - Use dev-libs/jemalloc for allocations
www-servers/xsp:developer - creates .mdb files for either Release and Debug
www-servers/xsp:net35 - use .NET 3.5 Framework
www-servers/xsp:net40 - use .NET 4.0 Framework
www-servers/xsp:net45 - use .NET 4.5 Framework
x11-apps/copyq:webkit - enables the application to use advanced HTML rendering and fetching remote images and other data
x11-apps/intel-gpu-tools:python - Install python based register dumper utilities
x11-apps/intel-gpu-tools:test-programs - Install test programs for DRM driver development
x11-apps/intel-gpu-tools:unwind - Provide automatic stack traces on test failures
x11-apps/mesa-progs:egl - Build EGL utilities
x11-apps/mesa-progs:gles2 - Build OpenGL ES 2 utilities
x11-apps/xdm:consolekit - Enable native sys-auth/consolekit support
x11-apps/xdm:xdm-auth - Enable XDM-AUTHENTICATION-1 support
x11-apps/xdpyinfo:dmx - Builds support for Distributed Multiheaded X x11-base/xorg-server
x11-apps/xinit:minimal - Control dependencies on legacy apps (xterm, twm, ...). Safe to enable if you use a modern desktop environment.
x11-apps/xsm:rsh - This allows the use of rsh (remote shell) and rcp (remote copy).
x11-base/xorg-server:dmx - Build the Distributed Multiheaded X server
x11-base/xorg-server:glamor - Enable Glamor OpenGL 2D acceleration
x11-base/xorg-server:kdrive - Build the kdrive X servers
x11-base/xorg-server:tslib - Build with tslib support for touchscreen devices
x11-base/xorg-server:unwind - Enable libunwind usage for backtraces
x11-base/xorg-server:xephyr - Build the Xephyr server
x11-base/xorg-server:xnest - Build the Xnest server
x11-base/xorg-server:xorg - Build the Xorg X server (HIGHLY RECOMMENDED)
x11-base/xorg-server:xvfb - Build the Xvfb server
x11-drivers/ati-drivers:disable-watermark - Do a potentially dangerous binary search and replace to disable watermark
x11-drivers/ati-drivers:modules - Build the kernel modules
x11-drivers/ati-drivers:pax_kernel - Enable pax kernel specific patches
x11-drivers/ati-drivers:qt4 - Install qt4 dependent optional tools (e.g Catalyst Control Panel)
x11-drivers/ati-drivers:vaapi - Enabled Video Acceleration API
x11-drivers/nvidia-drivers:X - Install the X.org driver, OpenGL libraries, XvMC libraries, and VDPAU libraries
x11-drivers/nvidia-drivers:compat - Install non-GLVND libGL for backwards compatibility
x11-drivers/nvidia-drivers:driver - Install the kernel driver module
x11-drivers/nvidia-drivers:gtk2 - Install nvidia-settings with support for GTK+ 2
x11-drivers/nvidia-drivers:gtk3 - Install nvidia-settings with support for GTK+ 3
x11-drivers/nvidia-drivers:kms - Enable support for kernel mode setting (KMS)
x11-drivers/nvidia-drivers:pax_kernel - PaX patches from the PaX project
x11-drivers/nvidia-drivers:tools - Install additional tools such as nvidia-settings
x11-drivers/nvidia-drivers:uvm - Install the Unified Memory kernel module (nvidia-uvm) for sharing memory between CPU and GPU in CUDA programs
x11-drivers/xf86-video-amdgpu:glamor - Enable Glamor OpenGL 2D acceleration
x11-drivers/xf86-video-ati:glamor - Enable Glamor OpenGL 2D acceleration
x11-drivers/xf86-video-geode:ztv - Enable building the V4L2 ZTV driver
x11-drivers/xf86-video-intel:dri3 - Use DRI3 by default
x11-drivers/xf86-video-intel:sna - Enable SandyBridge's New Acceleration (useful on all chipsets, not just SandyBridge)
x11-drivers/xf86-video-intel:uxa - Enable UMA Acceleration Architecture
x11-drivers/xf86-video-intel:xvmc - Enables X-Video Motion Compensation support
x11-drivers/xf86-video-nouveau:glamor - Enable Glamor OpenGL 2D acceleration
x11-drivers/xf86-video-openchrome:viaregtool - Install registers dumper tool
x11-drivers/xf86-video-qxl:xspice - Build the xspice driver
x11-libs/agg:gpc - Enable gpc polygon clipper library
x11-libs/cairo:gles2 - Build the OpenGL ES 2 backend
x11-libs/cairo:glib - Compile with GLib Object System support
x11-libs/cairo:opengl - Build the OpenGL backend
x11-libs/cairo:utils - Build support for Cairo script and trace utilities
x11-libs/cairo:valgrind - Built-in support to mark memory regions
x11-libs/fltk:games - Builds and installs some extra games
x11-libs/gdk-pixbuf:X - Build and install the legacy gdk_pixbuf_xlib-2.0 library
x11-libs/granite:demo - Build the Granite demo application (to present all available UI features provided by the library)
x11-libs/gtk+:broadway - Enable the GDK Broadway backend.
x11-libs/gtk+:cloudprint - Enable printing via Google Cloud Print.
x11-libs/gtk+:colord - Use x11-misc/colord for color management in printing
x11-libs/gtkdatabox:glade - Build with libglade and glade-3 supports, which includes a glade's module for GtkDataBox widget
x11-libs/gtkmathview:mathml - Install additional fonts for proper mathml support.
x11-libs/gtkmathview:t1lib - Enable media-libs/t1lib support
x11-libs/gtksourceview:glade - Install a glade catalog file
x11-libs/libQGLViewer:designer - Installs dev-qt/designer plugin.
x11-libs/libSM:uuid - Use UUID for session identification instead of IP address and system time.
x11-libs/libXaw:deprecated - Install deprecated Xaw6 library.
x11-libs/libXfont:bzip2 - Support bzip2 compressed PCF fonts.
x11-libs/libXfont:truetype - Use media-libs/freetype for font rasterization.
x11-libs/libXfont2:bzip2 - Support bzip2 compressed PCF fonts.
x11-libs/libXfont2:truetype - Use media-libs/freetype for font rasterization.
x11-libs/libaosd:pango - Enable the textual helpers (requires pangocairo).
x11-libs/libaosd:tools - Install the aosd_cat tool (requires glib-2.0).
x11-libs/libdesktop-agnostic:gconf - Enable GConf as configuration backend
x11-libs/libdesktop-agnostic:glade - Install the Glade catalog for the desktop-agnotstic GTK widgets.
x11-libs/libdrm:libkms - Enable building of libkms, a library for applications to interface with KMS
x11-libs/libdrm:valgrind - Compile in valgrind memory hints
x11-libs/libqxt:berkdb - Build the QxtBerkeley module
x11-libs/libqxt:sql - Build the QxtSql module
x11-libs/libqxt:web - Build the QxtWeb module
x11-libs/libqxt:zeroconf - Build the QxtZeroconf module
x11-libs/libva:drm - Enables VA/DRM API support.
x11-libs/libva:egl - Enables EGL support.
x11-libs/libva:utils - Install VA-API utility programs.
x11-libs/libva-intel-driver:drm - Enables VA/DRM API support.
x11-libs/libwnck:tools - Install wnckprop-3 and wnck-urgency-monitor-3 command-line tools
x11-libs/libxcb:xkb - Enable the XCB keyboard extension
x11-libs/motif:motif22-compatibility - Compatibility with Open Motif 2.2
x11-libs/pixman:loongson2f - Enable Loongson2f MMI optimizations.
x11-libs/qscintilla:designer - Build plugin for Qt Designer
x11-libs/qwt:designer - Installs dev-qt/designer plugin.
x11-libs/qwt:mathml - Use the MathML renderer of the Qt solutions package.
x11-libs/vte:glade - Provide integration with dev-util/glade.
x11-libs/wxGTK:gnome - Use gnome-base/libgnomeprintui for printing tasks.
x11-libs/wxGTK:gstreamer - Enable the wxMediaCtrl class for playing audio and video through gstreamer.
x11-libs/wxGTK:sdl - Use Simple Directmedia Layer (media-libs/libsdl) for audio.
x11-misc/alock:doc - Build and install manpage with app-text/asciidoc.
x11-misc/bumblebee:bbswitch - Add dependency on sys-power/bbswitch for PM feature
x11-misc/cdm:consolekit - Enable native consolekit support
x11-misc/colord:argyllcms - Enable ArgyllCMS sensor
x11-misc/colord:extra-print-profiles - Generate extra print profiles. Warning: significant build time and memory requirements.
x11-misc/colord:gusb - Enable dev-libs/libgusb support, needed for colorimeter drivers
x11-misc/compton:drm - Enable VSync with DRM_IOCTL_WAIT_VBLANK
x11-misc/compton:opengl - Enable VSync with SGI_swap_control OpenGL extension
x11-misc/dunst:dunstify - Experimental replacement for notify-send.
x11-misc/fbpager:xrender - Enable transparency support via x11-libs/libXrender
x11-misc/gpaste:applet - Enable gpaste-applet
x11-misc/gpaste:gnome - Enable proper gnome support and enable gnome shell extension.
x11-misc/gtkdialog:glade - Enable support for gnome-base/libglade
x11-misc/gtkdialog:vte - Enable support for x11-libs/vte
x11-misc/i3status:filecaps - Linux capabilities library is required for i3status to be able to read net bandwith
x11-misc/ktsuss:sudo - Use the sudo backend instead the su one
x11-misc/light-locker:consolekit - Keep track of the various users, sessions, and seats present on the system.
x11-misc/light-locker:dpms - Turn on the display on screensaver deactivation.
x11-misc/light-locker:gtk3 - Build with GTK+ 3 instead of GTK+ 2.
x11-misc/light-locker:screensaver - Lock the screen on screensaver activation.
x11-misc/lightdm:gtk - Pull in the gtk+ greeter
x11-misc/mate-notification-daemon:gtk3 - Build with GTK+3 instead of GTK+2
x11-misc/mozo:gtk3 - Build with GTK+3 instead of GTK+2
x11-misc/openbox-menu:icons - Enable support for icons in menus
x11-misc/openbox-menu:svg - Support SVG icons
x11-misc/qt5ct:dbus - Enable system tray and global menu support
x11-misc/qt5ct:systray - Enable system tray support
x11-misc/redshift:appindicator - Enable usage of dev-libs/libappindicator to export menu options in to unity and KDE 5
x11-misc/redshift:geoclue - Control dependency on app-misc/geoclue
x11-misc/rofi:windowmode - Enable normal window mode
x11-misc/rss-glx:quesoglc - Enable support for OpenGL Character Renderer
x11-misc/sddm:consolekit - Use ck-launch-session from sys-auth/consolekit by default in Xsession (no native support)
x11-misc/sddm:elogind - Use sys-auth/elogind for session tracking.
x11-misc/sent:savedconfig - Without a saved config.h, this package depends on media-gfx/farbfeld for image conversions
x11-misc/shutter:drawing - Enables drawing tool
x11-misc/slim:consolekit - Enable native consolekit support
x11-misc/spacefm:gtk2 - Support GTK+ 2.x instead of GTK+ 3.x
x11-misc/spacefm:gtk3 - Support GTK+ 3.x instead of GTK+ 2.x
x11-misc/spacefm:video-thumbnails - Support video thumbnails with media-video/ffmpegthumbnailer
x11-misc/stalonetray:graceful-exit - use non-portable hack to exit gracefuly on signal
x11-misc/tint2:battery - Enable battery status plugin
x11-misc/tint2:tint2conf - Build/Install tint2conf as well
x11-misc/vnc2swf:x11vnc - Install script that depends on x11vnc
x11-misc/wbar:gtk - Enables the gtk-based wbar-config GUI
x11-misc/xkbset:tk - Install the dev-perl/Tk based xkbset-gui utility
x11-misc/xlockmore:vtlock - Enables support for virtual terminal locking
x11-misc/xlockmore:xlockrc - Enables xlockrc for people without PAM
x11-misc/xmobar:mpd - Support mpd plugin
x11-misc/xmobar:mpris - Enables MPRIS v1, v2 support
x11-misc/xmobar:timezone - Enables localized date support
x11-misc/xmobar:with_conduit - Use conduit to fetch weather data.
x11-misc/xmobar:with_uvmeter - Plugin to show UV data for Australia.
x11-misc/xscreensaver:gdm - Use gdmflexiserver from gnome-base/gdm instead of x11-misc/lightdm
x11-misc/xscreensaver:new-login - Enable user switching support using gdmflexiserver (x11-misc/lightdm)
x11-misc/xss-lock:man - Build and install man pages
x11-plugins/bfm:gkrellm - Enable building of app-admin/gkrellm module
x11-plugins/compiz-plugins-extra:gconf - Install GConf schemas for the plugins, needed when using the GConf-based configuration backend in x11-wm/compiz.
x11-plugins/compiz-plugins-main:gconf - Install GConf schemas for the plugins, needed when using the GConf-based configuration backend in x11-wm/compiz.
x11-plugins/pidgin-mbpurple:twitgin - Enable graphical plugin for Gtk+ interface of Pidgin.
x11-plugins/pidgin-sipe:ocs2005-message-hack - Disable message timeout for OCS2005 clients which causes "false" not delivered error messages
x11-plugins/pidgin-sipe:openssl - Enable crypto support via dev-libs/openssl
x11-plugins/pidgin-sipe:telepathy - Support use as a telepathy backend
x11-plugins/pidgin-sipe:voice - Enable experimental voice/video support
x11-plugins/purple-plugin_pack:talkfilters - Enable support for app-text/talkfilters
x11-plugins/vicious:contrib - Install extra widgets, some for less common hardware, some contributed by Vicious users.
x11-plugins/wmfire:session - Enable session management
x11-plugins/wmsysmon:high-ints - Enable support for monitoring 24 interrupts. Useful on SMP machines
x11-terms/aterm:background - Enable background image support via media-libs/libafterimage
x11-terms/aterm:xgetdefault - Enable resources via X instead of aterm small version
x11-terms/eterm:escreen - Enable built-in app-misc/screen support
x11-terms/eterm:utempter - Include libutempter support
x11-terms/gnome-terminal:gnome-shell - Integrate with gnome-base/gnome-shell search
x11-terms/gnome-terminal:nautilus - Build gnome-base/nautilus extension
x11-terms/hanterm:utempter - Records user logins. Useful on multi-user systems
x11-terms/mate-terminal:gtk3 - Build with GTK+3 instead of GTK+2
x11-terms/mlterm:fcitx - Enable support for app-i18n/fcitx
x11-terms/mlterm:gtk2 - Build with x11-libs/gtk+:2 instead of x11-libs/gtk+:3
x11-terms/mlterm:ibus - Enable support for app-i18n/ibus
x11-terms/mlterm:libssh2 - Enable support for net-libs/libssh2
x11-terms/mlterm:regis - Enable support for ReGIS
x11-terms/mlterm:scim - Enable support for app-i18n/scim
x11-terms/mlterm:skk - Enable support for SKK (virtual/skkserv or app-i18n/skk-jisyo)
x11-terms/mlterm:uim - Enable support for app-i18n/uim
x11-terms/mlterm:utempter - Enable support for sys-libs/libutempter
x11-terms/mrxvt:menubar - Enable mrxvt menubar
x11-terms/mrxvt:utempter - REcords user logins. Useful on multi-user systems
x11-terms/rxvt-unicode:256-color - Enable 256 color support
x11-terms/rxvt-unicode:alt-font-width - Calculate the font width using a different method
x11-terms/rxvt-unicode:blink - Enable blinking text
x11-terms/rxvt-unicode:buffer-on-clear - Store visible output to history buffer when clearing the screen with ctrl-l. Read https://bbs.archlinux.org/viewtopic.php?id=129302
x11-terms/rxvt-unicode:fading-colors - Enable colors fading when off focus
x11-terms/rxvt-unicode:focused-urgency - Enable the urgent flag when a terminal window is focused
x11-terms/rxvt-unicode:font-styles - Enable support for bold and italic fonts
x11-terms/rxvt-unicode:iso14755 - Enable ISO-14755 support
x11-terms/rxvt-unicode:mousewheel - Enable scrolling via mouse wheel or buttons 4 and 5
x11-terms/rxvt-unicode:perl - Enable perl script support. You can still disable this at runtime with -pe ""
x11-terms/rxvt-unicode:pixbuf - Enable transparency support using gtk's pixbuf
x11-terms/rxvt-unicode:secondary-wheel - Support for wheel scrolling on secondary screens (like mutt). Read http://lists.schmorp.de/pipermail/rxvt-unicode/2011q4/001491.html
x11-terms/rxvt-unicode:unicode3 - Use 21 instead of 16 bits to represent unicode characters
x11-terms/rxvt-unicode:wcwidth - Enable wide char width support
x11-terms/terminator:libnotify - Enables desktop notifications viadev-python/notify-python
x11-terms/xterm:openpty - Use openpty() in preference to posix_openpt()
x11-terms/xterm:toolbar - Enable the xterm toolbar to be built
x11-themes/arc-theme:cinnamon - Install theme for gnome-extra/cinnamon
x11-themes/arc-theme:gnome-shell - Install theme for gnome-base/gnome-shell
x11-themes/arc-theme:gtk2 - Install GTK+2 theme
x11-themes/arc-theme:gtk3 - Install GTK+3 theme
x11-themes/arc-theme:mate - Install Metacity theme for mate-base/mate
x11-themes/arc-theme:xfce - Install theme for xfce-base/xfwm4
x11-themes/comix-xcursors:lefthanded - Install lefthanded version of theme in addition to default one
x11-themes/comix-xcursors:opaque - Install non-transparent version of theme in addition to default one
x11-themes/gentoo-artwork:grub - Install extra sys-boot/grub themes
x11-themes/gentoo-artwork:icons - Install icons
x11-themes/gentoo-artwork:lilo - Install extra sys-boot/lilo themes
x11-themes/gentoo-artwork:pixmaps - Install pixmaps
x11-themes/gtk-engines-murrine:animation-rtl - Progressbar animation from right to left
x11-themes/gtk-engines-murrine:themes - Pull in themes via x11-themes/murrine-themes
x11-themes/gtk-engines-nodoka:animation-rtl - Progressbar animation from right to left
x11-themes/kfaenza:additional - Install additional KFaenza icons. See third homepage for details
x11-themes/light-themes:gtk3 - Support GTK 3.x, too
x11-themes/mate-themes-meta:gtk2-only - Allow dependency-resolution for a system without GTK+3
x11-themes/redhat-artwork:audacious - Install media-sound/audacious theme
x11-themes/redhat-artwork:cursors - Install Bluecurve cursors
x11-themes/redhat-artwork:gdm - Install Bluecurve gnome-base/gdm theme
x11-themes/redhat-artwork:icons - Install Bluecurve icons
x11-themes/redhat-artwork:nautilus - Install Bluecurve gnome-base/nautilus icons
x11-themes/skinenigmang-logos:dxr3 - Install logos for lower osd color depth on dxr3 cards
x11-themes/vertex-theme:cinnamon - Install theme for gnome-extra/cinnamon
x11-themes/vertex-theme:gnome-shell - Install theme for gnome-base/gnome-shell
x11-themes/vertex-theme:mate - Install Metacity theme for mate-base/mate
x11-themes/vertex-theme:xfce - Install theme for xfce-base/xfwm4
x11-themes/zuki-themes:gnome-shell - Install theme for gnome-base/gnome-shell
x11-themes/zuki-themes:mate - Install Metacity theme for mate-base/mate
x11-themes/zuki-themes:xfce - Install theme for xfce-base/xfwm4
x11-themes/zukitwo:gnome-shell - Install theme for gnome-base/gnome-shell
x11-wm/awesome:luajit - Use dev-lang/luajit instead of dev-lang/lua
x11-wm/compiz:fuse - Enables support for the filesystem in userspace plugin through sys-fs/fuse.
x11-wm/compiz:gconf - Enable the GConf-based configuration backend; it is not required to work with GNOME, and might actually be faster if it's not used.
x11-wm/compiz-fusion:emerald - Install the x11-wm/emerald package.
x11-wm/compiz-fusion:unsupported - Install the x11-plugins/compiz-plugins-unsupported package.
x11-wm/echinus:xrandr - Enable support for multihead configuration
x11-wm/enlightenment:enlightenment_modules_appmenu - Gadget that hold the toolbar of the foreground application
x11-wm/enlightenment:enlightenment_modules_backlight - Backlight control slider gadget
x11-wm/enlightenment:enlightenment_modules_battery - A gadget to visualize your battery status
x11-wm/enlightenment:enlightenment_modules_bluez4 - Configure Bluetooth devices
x11-wm/enlightenment:enlightenment_modules_clock - Nice clock gadget to show current time
x11-wm/enlightenment:enlightenment_modules_conf - Settings Panel
x11-wm/enlightenment:enlightenment_modules_conf-applications - Allows configuration of Ibar, Restart, and Startup applications
x11-wm/enlightenment:enlightenment_modules_conf-bindings - Input Control Settings
x11-wm/enlightenment:enlightenment_modules_conf-dialogs - Configure default dialog properties
x11-wm/enlightenment:enlightenment_modules_conf-display - Used to configure your screen
x11-wm/enlightenment:enlightenment_modules_conf-interaction - Configure Mouse and Touch input
x11-wm/enlightenment:enlightenment_modules_conf-intl - Used to select a default language
x11-wm/enlightenment:enlightenment_modules_conf-menus - Configures menu behavior
x11-wm/enlightenment:enlightenment_modules_conf-paths - Specifies the Enlightenment search paths and default directories
x11-wm/enlightenment:enlightenment_modules_conf-performance - Used to configure certain performance related items as frame rates and cache settings
x11-wm/enlightenment:enlightenment_modules_conf-randr - Used to configure your screen's resolution
x11-wm/enlightenment:enlightenment_modules_conf-shelves - Shelf configuration dialog
x11-wm/enlightenment:enlightenment_modules_conf-theme - Used to configure your theme preferences
x11-wm/enlightenment:enlightenment_modules_conf-window-manipulation - Configures window raise, resistance, and maximize policies
x11-wm/enlightenment:enlightenment_modules_conf-window-remembers - Delete existing window remembers
x11-wm/enlightenment:enlightenment_modules_connman - Control Wifi and wired networks as a user
x11-wm/enlightenment:enlightenment_modules_cpufreq - Gadget to monitor and change the CPU frequency
x11-wm/enlightenment:enlightenment_modules_everything - The run command module provides an application launcher dialog
x11-wm/enlightenment:enlightenment_modules_fileman - Enlightenment's integrated file manager
x11-wm/enlightenment:enlightenment_modules_fileman-opinfo - Can be placed on the desktop or in a shelf
x11-wm/enlightenment:enlightenment_modules_gadman - Module to manage gadgets on the desktop
x11-wm/enlightenment:enlightenment_modules_geolocation - Geolocation
x11-wm/enlightenment:enlightenment_modules_ibar - Iconic application launcher
x11-wm/enlightenment:enlightenment_modules_ibox - A home for your iconified applications
x11-wm/enlightenment:enlightenment_modules_lokker - Screen locker
x11-wm/enlightenment:enlightenment_modules_mixer - A module to provide a mixer for changing volume
x11-wm/enlightenment:enlightenment_modules_msgbus - DBus Extension
x11-wm/enlightenment:enlightenment_modules_music-control - Control your music in your shelf
x11-wm/enlightenment:enlightenment_modules_notification - notification-daemon alternative. Popup if an event occur
x11-wm/enlightenment:enlightenment_modules_packagekit - Package manager integration
x11-wm/enlightenment:enlightenment_modules_pager - Gadget to allow you to visualize your virtual desktops and the windows they contain
x11-wm/enlightenment:enlightenment_modules_pager-plain - A simpler desktop pager
x11-wm/enlightenment:enlightenment_modules_policy-mobile - 
x11-wm/enlightenment:enlightenment_modules_quickaccess - Enlightenment Quickaccess Launcher
x11-wm/enlightenment:enlightenment_modules_shot - Simple screenshot+save/upload module
x11-wm/enlightenment:enlightenment_modules_start - Enlightenment's 'Start' button equivalent
x11-wm/enlightenment:enlightenment_modules_syscon - This module provides a unified popup dialog for all the system actions in Enlightenment
x11-wm/enlightenment:enlightenment_modules_systray - system tray that hold applications icons like Skype, Pidgin, Kopete and others
x11-wm/enlightenment:enlightenment_modules_tasks - Gadget to allow you to switch tasks
x11-wm/enlightenment:enlightenment_modules_teamwork - Enable teamwork module
x11-wm/enlightenment:enlightenment_modules_temperature - Temperature monitor
x11-wm/enlightenment:enlightenment_modules_tiling - Positions/resizes your windows tilingly
x11-wm/enlightenment:enlightenment_modules_time - Time related gadgets
x11-wm/enlightenment:enlightenment_modules_winlist - A module to show the list of client applications presently running
x11-wm/enlightenment:enlightenment_modules_wireless - WiFi monitoring
x11-wm/enlightenment:enlightenment_modules_wizard - First Run Wizard
x11-wm/enlightenment:enlightenment_modules_wl-desktop-shell - Enlightenment Wayland Desktop Shell
x11-wm/enlightenment:enlightenment_modules_wl-drm - Wayland DRM (Direct Rendering Manager) compositing module
x11-wm/enlightenment:enlightenment_modules_wl-text-input - Wayland text input support
x11-wm/enlightenment:enlightenment_modules_wl-weekeyboard - Wayland virtual keyboard
x11-wm/enlightenment:enlightenment_modules_wl-wl - Wayland-in-Wayland module
x11-wm/enlightenment:enlightenment_modules_wl-x11 - Wayland-in-X11 module
x11-wm/enlightenment:enlightenment_modules_xkbswitch - Keyboard layout configuration and switcher
x11-wm/enlightenment:enlightenment_modules_xwayland - X/Wayland integration
x11-wm/enlightenment:pango - Enable pango font rendering
x11-wm/enlightenment:ukit - Use upower/udisks to automount devices
x11-wm/enlightenment:xrandr - Enable support for the X xrandr extension
x11-wm/fluxbox:bidi - Enable bidirectional language support with dev-libs/fribidi
x11-wm/fluxbox:slit - Enables the Fluxbox slit (or dock)
x11-wm/fluxbox:systray - Enables the system tray in the Fluxbox toolbar
x11-wm/fluxbox:toolbar - Enables the Fluxbox toolbar
x11-wm/fvwm:gtk2-perl - Enable GTK2 Perl bindings
x11-wm/fvwm:lock - Enable screen locking
x11-wm/fvwm:netpbm - Enable NetPBM support (used by FvwmScript-ScreenDump)
x11-wm/fvwm:rplay - Enable rplay support
x11-wm/fvwm:stroke - Mouse Gesture support
x11-wm/i3:doc - Build and install the HTML documentation and regenerate the man pages
x11-wm/lumina:desktop-utils - Build and install lumina's desktop-utils
x11-wm/marco:gtk3 - Build with GTK+3 instead of GTK+2
x11-wm/musca:apis - Optionally install the experimental `apis' window manager
x11-wm/musca:xlisten - Optionally install the xlisten utility
x11-wm/mutter:kms - Enable KMS support.
x11-wm/notion:xrandr - Add support for xrandr
x11-wm/openbox:session - Enables support for session managers
x11-wm/openbox:xdg - Install the python xdg files for xdg autostart
x11-wm/pekwm:contrib - Install optional extras in the documentation directory
x11-wm/pekwm:themes - Install additional themes
x11-wm/qtile:widget-imap - Add support for ImapWidget widget (requires additonal dependencies).
x11-wm/qtile:widget-keyboardkbdd - Add support for KeyboardKbdd widget (requires dbus support).
x11-wm/qtile:widget-khal-calendar - Add support for KhalCalendar widget (requires additonal dependencies).
x11-wm/qtile:widget-launchbar - Add support for LaunchBar widget (requires additional dependencies).
x11-wm/qtile:widget-mpd - Add support for Mpd and Mpd2 widgets (requires additional dependencies).
x11-wm/qtile:widget-mpris - Add support for Mpris and Mpris2 widgets (requires dbus support).
x11-wm/qtile:widget-wlan - Add support for Wlan widget (requires additional dependencies). Will only work with Python 2.7 ABI.
x11-wm/ratpoison:history - Use sys-libs/readline for history handling
x11-wm/ratpoison:sloppy - Install sloppy, a focus-follows-mouse implementation for ratpoison
x11-wm/ratpoison:xrandr - Enable support for XRandR
x11-wm/stumpwm:clisp - Use CLISP for the runtime
x11-wm/stumpwm:contrib - Install contrib modules
x11-wm/stumpwm:doc - Include documentation
x11-wm/stumpwm:ecl - Use SCL for the runtime
x11-wm/stumpwm:emacs - Add support for GNU Emacs
x11-wm/stumpwm:sbcl - Use SBCL for the runtime
x11-wm/subtle:xrandr - Enable support for the X RandR extension
x11-wm/subtle:xtest - Enable support for the XTest extension
x11-wm/vtwm:rplay - Enable rplay support, needed for sound.
x11-wm/windowmaker:modelock - Enable XKB language status lock support. README says: "If you don't know what it is you probably don't need it."
x11-wm/windowmaker:webp - Enables WebP image format support using media-libs/libwebp
x11-wm/windowmaker:xrandr - Enable XRandR window extension support
x11-wm/wmfs:imlib2 - Enable image support through media-libs/imlib2
x11-wm/xmonad:default-term - Pull terminal specified in default xmonad config to be a bit less hostile by default.
x11-wm/xmonad:no-autorepeat-keys - Allow ignoring of keyboard autorepeat.
x11-wm/xpra:client - Build client-side code
x11-wm/xpra:clipboard - Enable clipboard support
x11-wm/xpra:csc - Enable csc softscaler support
x11-wm/xpra:dec_avcodec2 - Enable avcodec2 decoder support
x11-wm/xpra:enc_ffmpeg - Enable advanced ffmpeg/libav encoder support
x11-wm/xpra:enc_x264 - Enable x264 encoder support
x11-wm/xpra:enc_x265 - Enable x265 encoder support
x11-wm/xpra:lz4 - Enable support for lz4 compression
x11-wm/xpra:pillow - Enable pillow support
x11-wm/xpra:server - Build server-side code
x11-wm/xpra:vpx - Enable vpx image format support
x11-wm/xpra:webcam - Enable webcam support via opencv
x11-wm/xpra:webp - Enable webp image format support
xfce-base/garcon:gtk2 - Build the garcon-gtk2-1 library (required for xfce-base/xfce4-panel < 4.13 only).
xfce-base/libxfce4ui:glade - Build support for Glade 3's GtkBuilder implementation
xfce-base/thunar:trash-panel-plugin - Build the trash status indicator plugin for the XFCE panel
xfce-base/xfce4-settings:libcanberra - Enable sound event support using media-libs/libcanberra
xfce-base/xfce4-settings:xklavier - Enable keyboard layout selection support using x11-libs/libxklavier
xfce-base/xfdesktop:thunar - Build support for desktop icons (for example, launchers and folders)
xfce-base/xfwm4:xpresent - Enable the XPresent extension for sync to vblank
xfce-extra/tumbler:odf - Enable support for .odf thumbnailers by using gnome-extra/libgsf
xfce-extra/xfce4-clipman-plugin:qrcode - Enable support for media-gfx/qrencode
xfce-extra/xfce4-mixer:keybinder - Enable shortcut support using dev-libs/keybinder
xfce-extra/xfce4-mpc-plugin:libmpd - Build using media-libs/libmpd backend, instead of native fallback which is preferred
xfce-extra/xfce4-playercontrol-plugin:audacious - Enable Audacious support
xfce-extra/xfce4-playercontrol-plugin:mpd - Enable Music Player Daemon support
xfce-extra/xfce4-power-manager:panel-plugin - Build the power management plugin for the XFCE panel
xfce-extra/xfce4-pulseaudio-plugin:keybinder - Enable support for global hotkeys using dev-libs/keybinder.
xfce-extra/xfce4-soundmenu-plugin:glyr - Enable music metadata searchengine support using media-libs/glyr
xfce-extra/xfce4-soundmenu-plugin:keybinder - Enable shortcut support using dev-libs/keybinder
xfce-extra/xfce4-soundmenu-plugin:lastfm - Enable last.fm support using media-libs/libclastfm
xfce-extra/xfce4-taskmanager:gksu - Build against x11-libs/libgksu to provide "Run as root" option in the application's menu
xfce-extra/xfce4-taskmanager:gtk3 - Use GTK+3 instead of GTK+2
xfce-extra/xfswitch-plugin:gdm - Compatibility with gnome-base/gdm only
xfce-extra/xfswitch-plugin:lightdm - Compatibility with x11-misc/lightdm only
xfce-extra/xfswitch-plugin:lxdm - Compatibility with lxde-base/lxdm only