.\" Gentoo Docs for Flavoured computers.
.TH man 7 "24 October 2025" "1.0" "Gentoo Docs for Flavoured computers"
.SH NAME
Gentoo Docs for Flavoured computers
.SH DESCRIPTION
My curated collection of documentation snippets related to Gentoo maintenance.
.SH UPDATING
.SS Old System
An older system can be incrementally updated by switching the rsynced gentoo repo to a git version, and controlling the update increment by using
.MR git-checkout 1
.PP
.EX
.IP
REV_ID=$(git rev-list -n 1 --first-parent --before="2022-12-01 00:00" master)
git checkout $REV_ID
emerge -av1 glibc
reboot
emerge -1av binutils
eselect binutils
source /etc/profile
.EE
.PP
Emerging GCC might not be possible because the patch version source is not available anymore. In that case, ensure you build an unpatched clean version like 13.2.0 by masking others and adding accept keywords for the specific version if necessary.
.SS Perl
.EX
emerge --nodeps dev-lang/perl
perl-cleaner
.EE
.SS Python
.PP New Version
After emerging a new python version, ensure that the version use flag is applied and adding it to the PYTHON_TARGETS, for instance:
.EX
.IP
emerge dev-lang/python:3.14
echo "-python_targets_python3_14" >> /etc/portage/profile/use.stable.mask
echo "*/* PYTHON_TARGETS: python3_14" >> /etc/portage/package.use
.SS QT
Circumvent circular dependencies by selecting and emerging the qt:6 packages in one go.
.EX
.IP
INSTALLED_QT_PACKAGES=$(eix --only-names -I -C dev-qt --slot 6)
emerge -1av ${INSTALLED_QT_PACKAGES}
.EE