# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-libs/glibc/files/eblits/src_compile.eblit,v 1.35 2013/04/05 18:25:21 vapier Exp $

glibc_do_configure() {
	local myconf=()

	einfo "Configuring GLIBC for $1"

	# set addons
	pushd "${S}" > /dev/null
	local ADDONS=$(echo */configure | sed \
		-e 's:/configure::g' \
		-e 's:\(linuxthreads\|nptl\|rtkaio\|glibc-compat\)\( \|$\)::g' \
		-e 's: \+$::' \
		-e 's! !,!g' \
		-e 's!^!,!' \
		-e '/^,\*$/d')
	[[ -d ports ]] && ADDONS="${ADDONS},ports"
	popd > /dev/null

	myconf+=( $(use_enable hardened stackguard-randomization) )
	if has_version '<sys-libs/glibc-2.13' ; then
		myconf+=( --enable-old-ssp-compat )
	fi

	[[ ${CTARGET//_/-} == *-softfloat-* ]] && myconf+=( --without-fp )

	if [[ $1 == "linuxthreads" ]] ; then
		if want_tls ; then
			myconf+=( --with-tls )

			if ! want__thread || use glibc-compat20 || [[ ${LT_KER_VER} == 2.[02].* ]] ; then
				myconf+=( --without-__thread )
			else
				myconf+=( --with-__thread )
			fi
		else
			myconf+=( --without-tls --without-__thread )
		fi

		myconf+=( --disable-sanity-checks )
		myconf+=( --enable-add-ons="linuxthreads${ADDONS}" )
		myconf+=( --enable-kernel=${LT_KER_VER} )
	elif [[ $1 == "nptl" ]] ; then
		myconf+=( --enable-add-ons="nptl${ADDONS}" )
		myconf+=( --enable-kernel=${NPTL_KERN_VER} )
	else
		die "invalid pthread option"
	fi

	# Since SELinux support is only required for nscd, only enable it if:
	# 1. USE selinux
	# 2. only for the primary ABI on multilib systems
	# 3. Not a crosscompile
	if ! is_crosscompile && use selinux ; then
		if use multilib || has_multilib_profile ; then
			if is_final_abi ; then
				myconf+=( --with-selinux )
			else
				myconf+=( --without-selinux )
			fi
		else
			myconf+=( --with-selinux )
		fi
	else
		myconf+=( --without-selinux )
	fi

	myconf+=(
		--without-cvs
		--enable-bind-now
		--build=${CBUILD_OPT:-${CBUILD}}
		--host=${CTARGET_OPT:-${CTARGET}}
		$(use_enable profile)
		$(use_with gd)
		--with-headers=$(alt_build_headers)
		--prefix=/usr
		--libdir=/usr/$(get_libdir)
		--mandir=/usr/share/man
		--infodir=/usr/share/info
		--libexecdir=/usr/$(get_libdir)/misc/glibc
		--with-bugurl=http://bugs.gentoo.org/
		--with-pkgversion="$(glibc_banner)"
		$(use_multiarch || echo --disable-multi-arch)
		--enable-obsolete-rpc
		$(in_iuse systemtap && use_enable systemtap)
		$(in_iuse nscd && use_enable nscd)
		${EXTRA_ECONF}
	)

	# There is no configure option for this and we need to export it
	# since the glibc build will re-run configure on itself
	export libc_cv_slibdir=/$(get_libdir)

	# We take care of patching our binutils to use both hash styles,
	# and many people like to force gnu hash style only, so disable
	# this overriding check.  #347761
	export libc_cv_hashstyle=no

	# Overtime, generating info pages can be painful.  So disable this for
	# versions older than the latest stable to avoid the issue (this ver
	# should be updated from time to time).  #464394
	if ! version_is_at_least 2.15 ; then
		export ac_cv_prog_MAKEINFO=:
	fi

	local GBUILDDIR=${WORKDIR}/build-${ABI}-${CTARGET}-$1
	mkdir -p "${GBUILDDIR}"
	cd "${GBUILDDIR}"
	set -- "${S}"/configure "${myconf[@]}"
	echo "$@"
	"$@" || die "failed to configure glibc"

	# ia64 static cross-compilers are a pita in so much that they
	# can't produce static ELFs (as the libgcc.a is broken).  so
	# disable building of the programs for those targets if it
	# doesn't work.
	# XXX: We could turn this into a compiler test, but ia64 is
	# the only one that matters, so this should be fine for now.
	if is_crosscompile && [[ ${CTARGET} == ia64* ]] ; then
		sed -i '1i+link-static = touch $@' config.make
	fi
}

toolchain-glibc_src_compile() {
	echo
	local v
	for v in ABI CBUILD CHOST CTARGET CBUILD_OPT CTARGET_OPT CC {AS,C,CPP,CXX,LD}FLAGS ; do
		einfo " $(printf '%15s' ${v}:)   ${!v}"
	done

	export CC=$(tc-getCC ${CTARGET})
	# Glibc does not work with gold (for various reasons) #269274.
	if $(tc-getLD ${CTARGET}) --version | grep -q 'GNU gold' ; then
		local d="${T}/bfd-linker"
		mkdir -p "${d}"
		ln -sf $(which ${CTARGET}-ld.bfd) "${d}"/ld
		CC+=" -B${d}"
	fi
	einfo " $(printf '%15s' 'Manual CC:')   ${CC}"
	echo

	if want_linuxthreads ; then
		glibc_do_configure linuxthreads
		emake || die "make for ${ABI} failed"
	fi
	if want_nptl ; then
		# ... and then do the optional nptl build
		unset LD_ASSUME_KERNEL
		glibc_do_configure nptl
		emake || die "make for ${ABI} failed"
	fi
}

toolchain-glibc_headers_compile() {
	local GBUILDDIR=${WORKDIR}/build-${ABI}-${CTARGET}-headers
	mkdir -p "${GBUILDDIR}"
	cd "${GBUILDDIR}"

	# if we don't have a compiler yet, we cant really test it now ...
	# hopefully they don't affect header geneation, so let's hope for
	# the best here ...
	local v vars=(
		ac_cv_header_cpuid_h=yes
		libc_cv_{386,390,alpha,arm,hppa,ia64,mips,{powerpc,sparc}{,32,64},sh,x86_64}_tls=yes
		libc_cv_asm_cfi_directives=yes
		libc_cv_broken_visibility_attribute=no
		libc_cv_gcc___thread=yes
		libc_cv_mlong_double_128=yes
		libc_cv_mlong_double_128ibm=yes
		libc_cv_ppc_machine=yes
		libc_cv_ppc_rel16=yes
		libc_cv_predef_{fortify_source,stack_protector}=no
		libc_cv_visibility_attribute=yes
		libc_cv_z_combreloc=yes
		libc_cv_z_execstack=yes
		libc_cv_z_initfirst=yes
		libc_cv_z_nodelete=yes
		libc_cv_z_nodlopen=yes
		libc_cv_z_relro=yes
		libc_mips_abi=${ABI}
		libc_mips_float=$([[ $(tc-is-softfloat) == "yes" ]] && echo soft || echo hard)
	)
	einfo "Forcing cached settings:"
	for v in "${vars[@]}" ; do
		einfo " ${v}"
		export ${v}
	done

	# Pick out the correct location for build headers
	local ports="" myconf=()
	[[ -d ${S}/ports ]] && ports=",ports"
	myconf+=(
		--disable-sanity-checks
		--enable-hacker-mode
		--enable-add-ons=nptl${ports}
		--without-cvs
		--enable-bind-now
		--build=${CBUILD_OPT:-${CBUILD}}
		--host=${CTARGET_OPT:-${CTARGET}}
		--with-headers=$(alt_build_headers)
		--prefix=/usr
		${EXTRA_ECONF}
	)

	# Nothing is compiled here which would affect the headers for the target.
	# so forcing CC/CFLAGS is sane.  unless you dont have `gcc`.  then i
	# dont care :p.
	set -- "${S}"/configure "${myconf[@]}"
	CC=gcc \
	CFLAGS="-O1 -pipe" \
	CPPFLAGS="-U_FORTIFY_SOURCE" \
	LDFLAGS="" \
	"$@" || die "failed to configure glibc"
}

eblit-glibc-src_compile() {
	if is_crosscompile ; then
		export \
			libc_cv_c_cleanup=yes \
			libc_cv_forced_unwind=yes
	fi

	if just_headers ; then
		export ABI=default
		toolchain-glibc_headers_compile
		return
	fi

	setup_env

	if [[ -z ${OABI} ]] ; then
		local abilist=""
		if has_multilib_profile ; then
			abilist=$(get_install_abis)
		elif is_crosscompile || tc-is-cross-compiler ; then
			abilist=${DEFAULT_ABI}
		fi
		einfo "Building glibc for ABIs: ${abilist}"
		if [[ -n ${abilist} ]] ; then
			OABI=${ABI}
			for ABI in ${abilist} ; do
				export ABI
				src_compile
			done
			ABI=${OABI}
			unset OABI
			return 0
		fi
	fi

	toolchain-glibc_src_compile
}