# Copyright 1999-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-libs/glibc/glibc-2.3.5-r3.ebuild,v 1.34 2008/09/05 20:23:16 vapier Exp $

# Here's how the cross-compile logic breaks down ...
#  CTARGET - machine that will target the binaries
#  CHOST   - machine that will host the binaries
#  CBUILD  - machine that will build the binaries
# If CTARGET != CHOST, it means you want a libc for cross-compiling.
# If CHOST != CBUILD, it means you want to cross-compile the libc.
#  CBUILD = CHOST = CTARGET    - native build/install
#  CBUILD != (CHOST = CTARGET) - cross-compile a native build
#  (CBUILD = CHOST) != CTARGET - libc for cross-compiler
#  CBUILD != CHOST != CTARGET  - cross-compile a libc for a cross-compiler
# For install paths:
#  CHOST = CTARGET  - install into /
#  CHOST != CTARGET - install into /usr/CTARGET/

KEYWORDS="-* alpha amd64 arm -hppa ia64 m68k mips ppc ~s390 sh sparc x86"

BRANCH_UPDATE=""

# From linuxthreads/man
GLIBC_MANPAGE_VERSION="2.3.5"

# From manual
GLIBC_INFOPAGE_VERSION="2.3.5"

# Gentoo patchset
PATCH_VER="1.16"

# C Stubbs addon (contained in fedora, so ignoring)
#CSTUBS_VER="2.1.2"
#CSTUBS_TARBALL="c_stubs-${CSTUBS_VER}.tar.bz2"
#CSTUBS_URI="mirror://gentoo/${CSTUBS_TARBALL}"

# Fedora addons (from RHEL's glibc-2.3.4-2.src.rpm)
FEDORA_VER="20041219T2331"
FEDORA_TARBALL="glibc-fedora-${FEDORA_VER}.tar.bz2"
FEDORA_URI="mirror://gentoo/${FEDORA_TARBALL}"

GENTOO_TOOLCHAIN_BASE_URI="mirror://gentoo"

### PUNT OUT TO ECLASS?? ###
inherit eutils versionator libtool toolchain-funcs flag-o-matic gnuconfig multilib

DESCRIPTION="GNU libc6 (also called glibc2) C library"
HOMEPAGE="http://www.gnu.org/software/libc/libc.html"
LICENSE="LGPL-2"

IUSE="nls pic build nptl nptlonly erandom hardened userlocales multilib selinux glibc-compat20 glibc-omitfp linuxthreads-tls profile"

export CBUILD=${CBUILD:-${CHOST}}
export CTARGET=${CTARGET:-${CHOST}}
if [[ ${CTARGET} == ${CHOST} ]] ; then
	if [[ ${CATEGORY/cross-} != ${CATEGORY} ]] ; then
		export CTARGET=${CATEGORY/cross-}
	fi
fi
if [[ ${CTARGET} == ${CHOST} ]] ; then
	PROVIDE="virtual/libc"
fi

is_crosscompile() {
	[[ ${CHOST} != ${CTARGET} ]]
}

GLIBC_RELEASE_VER=$(get_version_component_range 1-3)

# Don't set this to :-, - allows BRANCH_UPDATE=""
BRANCH_UPDATE=${BRANCH_UPDATE-$(get_version_component_range 4)}

# (Recent snapshots fails with 2.6.5 and earlier with NPTL)
NPTL_KERNEL_VERSION=${NPTL_KERNEL_VERSION:-"2.6.6"}
LT_KERNEL_VERSION=${LT_KERNEL_VERSION:-"2.4.1"}

### SRC_URI ###

# This function handles the basics of setting the SRC_URI for a glibc ebuild.
# To use, set SRC_URI with:
#
#	SRC_URI="$(get_glibc_src_uri)"
#
# Other than the variables normally set by portage, this function's behavior
# can be altered by setting the following:
#
#	GENTOO_TOOLCHAIN_BASE_URI
#			This sets the base URI for all gentoo-specific patch files. Note
#			that this variable is only important for a brief period of time,
#			before your source files get picked up by mirrors. However, it is
#			still highly suggested that you keep files in this location
#			available.
#
#	BRANCH_UPDATE
#			If set, this variable signals that we should be using the main
#			release tarball (determined by ebuild version) and applying a
#			CVS branch update patch against it. The location of this branch
#			update patch is assumed to be in ${GENTOO_TOOLCHAIN_BASE_URI}.
#			Just like with SNAPSHOT, this variable is ignored if the ebuild
#			has a _pre suffix.
#
#	PATCH_VER
#	PATCH_GLIBC_VER
#			This should be set to the version of the gentoo patch tarball.
#			The resulting filename of this tarball will be:
#			glibc-${PATCH_GLIBC_VER:-${GLIBC_RELEASE_VER}}-patches-${PATCH_VER}.tar.bz2
#
#	GLIBC_MANPAGE_VERSION
#	GLIBC_INFOPAGE_VERSION
#			The version of glibc for which we will download pages. This will
#			default to ${GLIBC_RELEASE_VER}, but we may not want to pre-generate man pages
#			for prerelease test ebuilds for example. This allows you to
#			continue using pre-generated manpages from the last stable release.
#			If set to "none", this will prevent the downloading of manpages,
#			which is useful for individual library targets.
#
get_glibc_src_uri() {
	GENTOO_TOOLCHAIN_BASE_URI=${GENTOO_TOOLCHAIN_BASE_URI:-"mirror://gentoo"}

#	GLIBC_SRC_URI="http://ftp.gnu.org/gnu/glibc/glibc-${GLIBC_RELEASE_VER}.tar.bz2
#	               http://ftp.gnu.org/gnu/glibc/glibc-linuxthreads-${GLIBC_RELEASE_VER}.tar.bz2
#	               http://ftp.gnu.org/gnu/glibc/glibc-libidn-${GLIBC_RELEASE_VER}.tar.bz2
	GLIBC_SRC_URI="mirror://gnu/glibc/glibc-${GLIBC_RELEASE_VER}.tar.bz2
	               mirror://gnu/glibc/glibc-linuxthreads-${GLIBC_RELEASE_VER}.tar.bz2
	               mirror://gnu/glibc/glibc-libidn-${GLIBC_RELEASE_VER}.tar.bz2"

	if [[ -n ${BRANCH_UPDATE} ]] ; then
		GLIBC_SRC_URI="${GLIBC_SRC_URI}
			${GENTOO_TOOLCHAIN_BASE_URI}/glibc-${GLIBC_RELEASE_VER}-branch-update-${BRANCH_UPDATE}.patch.bz2"
	fi

	if [[ -n ${PATCH_VER} ]] ; then
		GLIBC_SRC_URI="${GLIBC_SRC_URI}
			${GENTOO_TOOLCHAIN_BASE_URI}/glibc-${PATCH_GLIBC_VER:-${GLIBC_RELEASE_VER}}-patches-${PATCH_VER}.tar.bz2"
	fi

	if [[ ${GLIBC_MANPAGE_VERSION} != "none" ]] ; then
		GLIBC_SRC_URI="${GLIBC_SRC_URI}
			${GENTOO_TOOLCHAIN_BASE_URI}/glibc-manpages-${GLIBC_MANPAGE_VERSION:-${GLIBC_RELEASE_VER}}.tar.bz2"
	fi

	if [[ ${GLIBC_INFOPAGE_VERSION} != "none" ]] ; then
		GLIBC_SRC_URI="${GLIBC_SRC_URI}
			${GENTOO_TOOLCHAIN_BASE_URI}/glibc-infopages-${GLIBC_INFOPAGE_VERSION:-${GLIBC_RELEASE_VER}}.tar.bz2"
	fi

	if [[ -n ${CSTUBS_URI} ]] ; then
		GLIBC_SRC_URI="${GLIBC_SRC_URI} ${CSTUBS_URI}"
	fi

	if [[ -n ${FEDORA_URI} ]] ; then
		GLIBC_SRC_URI="${GLIBC_SRC_URI} ${FEDORA_URI}"
	fi

	echo "${GLIBC_SRC_URI}"
}

SRC_URI=$(get_glibc_src_uri)
S=${WORKDIR}/glibc-${GLIBC_RELEASE_VER}

### EXPORTED FUNCTIONS ###
toolchain-glibc_src_unpack() {
	# Check NPTL support _before_ we unpack things to save some time
	want_nptl && check_nptl_support

	unpack glibc-${GLIBC_RELEASE_VER}.tar.bz2

	cd "${S}"
	unpack glibc-linuxthreads-${GLIBC_RELEASE_VER}.tar.bz2
	unpack glibc-libidn-${GLIBC_RELEASE_VER}.tar.bz2

	[[ -n ${CSTUBS_TARBALL} ]] && unpack ${CSTUBS_TARBALL}
	[[ -n ${FEDORA_TARBALL} ]] && unpack ${FEDORA_TARBALL}

	if [[ -n ${PATCH_VER} ]] ; then
		cd "${WORKDIR}"
		unpack glibc-${PATCH_GLIBC_VER:-${GLIBC_RELEASE_VER}}-patches-${PATCH_VER}.tar.bz2
	fi

	# XXX: We should do the branchupdate, before extracting the manpages and
	# infopages else it does not help much (mtimes change if there is a change
	# to them with branchupdate)
	if [[ -n ${BRANCH_UPDATE} ]] ; then
		cd "${S}"
		epatch "${DISTDIR}"/glibc-${GLIBC_RELEASE_VER}-branch-update-${BRANCH_UPDATE}.patch.bz2

		# Snapshot date patch
		einfo "Patching version to display snapshot date ..."
		sed -i -e "s:\(#define RELEASE\).*:\1 \"${BRANCH_UPDATE}\":" version.h
	fi

	if [[ ${GLIBC_MANPAGE_VERSION} != "none" ]] ; then
		cd "${WORKDIR}"
		unpack glibc-manpages-${GLIBC_MANPAGE_VERSION:-${GLIBC_RELEASE_VER}}.tar.bz2
	fi

	if [[ ${GLIBC_INFOPAGE_VERSION} != "none" ]] ; then
		cd "${S}"
		unpack glibc-infopages-${GLIBC_INFOPAGE_VERSION:-${GLIBC_RELEASE_VER}}.tar.bz2
	fi

	if [[ -n ${PATCH_VER} ]] ; then
		cd "${S}"
		EPATCH_MULTI_MSG="Applying Gentoo Glibc Patchset ${PATCH_GLIBC_VER:-${GLIBC_RELEASE_VER}}-${PATCH_VER} ..." \
		EPATCH_EXCLUDE=${GLIBC_PATCH_EXCLUDE} \
		EPATCH_SUFFIX="patch" \
		ARCH=$(tc-arch) \
		epatch "${WORKDIR}"/patches
	fi
}

toolchain-glibc_src_compile() {
	# Set gconvdir to /usr/$(get_libdir)/gconv on archs with multiple ABIs
	local MAKEFLAGS=""
	has_multilib_profile && MAKEFLAGS="gconvdir=$(alt_usrlibdir)/gconv"

	echo
	for v in ABI CBUILD CHOST CTARGET CBUILD_OPT CTARGET_OPT CC CFLAGS ; do
		einfo " $(printf '%15s' ${v}:)   ${!v}"
	done
	echo

	if want_linuxthreads ; then
		glibc_do_configure linuxthreads
		einfo "Building GLIBC with linuxthreads..."
		make PARALLELMFLAGS="${MAKEOPTS}" ${MAKEFLAGS} || die
	fi
	if want_nptl ; then
		# ... and then do the optional nptl build
		unset LD_ASSUME_KERNEL
		glibc_do_configure nptl
		einfo "Building GLIBC with NPTL..."
		make PARALLELMFLAGS="${MAKEOPTS}" ${MAKEFLAGS} || die
	fi
}

toolchain-glibc_src_test() {
	# This is wrong, but glibc's tests fail bad when screwing
	# around with sandbox, so lets just punt it
	unset LD_PRELOAD

	# do the linuxthreads build unless we're using nptlonly
	if want_linuxthreads ; then
		cd "${WORKDIR}"/build-${ABI}-${CTARGET}-linuxthreads
		einfo "Checking GLIBC with linuxthreads..."
		make check || die "linuxthreads glibc did not pass make check"
	fi
	if want_nptl ; then
		cd "${WORKDIR}"/build-${ABI}-${CTARGET}-nptl
		unset LD_ASSUME_KERNEL || :
		einfo "Checking GLIBC with NPTL..."
		make check || die "nptl glibc did not pass make check"
	fi
}

toolchain-glibc_pkg_preinst() {
	# PPC64+others may want to eventually be added to this logic if they
	# decide to be multilib compatible and FHS compliant. note that this
	# chunk of FHS compliance only applies to 64bit archs where 32bit
	# compatibility is a major concern (not IA64, for example).

	# amd64's 2005.0 is the first amd64 profile to not need this code.
	# 2005.0 is setup properly, and this is executed as part of the
	# 2004.3 -> 2005.0 upgrade script.
	# It can be removed after 2004.3 has been purged from portage.
	{ use amd64 || use ppc64; } && [ "$(get_libdir)" == "lib64" ] && ! has_multilib_profile && fix_lib64_symlinks

	# it appears that /lib/tls is sometimes not removed. See bug
	# 69258 for more info.
	if [[ -d ${ROOT}/$(alt_libdir)/tls ]] && ! { want_nptl && want_linuxthreads; }; then
		addwrite "${ROOT}"/$(alt_libdir)/
		ewarn "nptlonly or -nptl in USE, removing /${ROOT}$(alt_libdir)/tls..."
		rm -r "${ROOT}"/$(alt_libdir)/tls || die
	fi

	# Shouldnt need to keep this updated
	[[ -e ${ROOT}/etc/locales.build ]] && rm -f "${D}"/etc/locales.build
}

toolchain-glibc_src_install() {
	# Need to dodir first because it might not exist (bad amd64 profiles)
	dodir $(alt_usrlibdir)

	# These should not be set, else the
	# zoneinfo do not always get installed ...
	unset LANGUAGE LANG LC_ALL

	if want_linuxthreads ; then
		cd "${WORKDIR}"/build-${ABI}-${CTARGET}-linuxthreads
		einfo "Installing GLIBC ${ABI} with linuxthreads ..."
		make PARALLELMFLAGS="${MAKEOPTS} -j1" \
			install_root="${D}" \
			install || die
	else # nptlonly
		cd "${WORKDIR}"/build-${ABI}-${CTARGET}-nptl
		einfo "Installing GLIBC ${ABI} with NPTL ..."
		make PARALLELMFLAGS="${MAKEOPTS} -j1" \
			install_root="${D}" \
			install || die
	fi

	if is_crosscompile ; then
		# punt all the junk not needed by a cross-compiler
		rm -rf "${D}"$(alt_prefix)/{bin,etc,$(get_libdir)/{gconv,misc},sbin,share}
	else
		# zoneinfo stuff is now provided by the timezone-data package
		rm -rf "${D}"/usr/share/zoneinfo
		rm -f "${D}"/usr/bin/tzselect
		rm -f "${D}"/usr/sbin/{zic,zdump}
	fi

	if want_linuxthreads && want_nptl ; then
		einfo "Installing NPTL to $(alt_libdir)/tls/..."
		cd "${WORKDIR}"/build-${ABI}-${CTARGET}-nptl
		mkdir -p "${D}"$(alt_libdir)/tls/

		libcsofile=$(basename "${D}"$(alt_libdir)/libc-*.so)
		cp -a libc.so "${D}"$(alt_libdir)/tls/${libcsofile} || die
		dosym ${libcsofile} $(alt_libdir)/tls/$(ls libc.so.*)

		libmsofile=$(basename "${D}"$(alt_libdir)/libm-*.so)
		pushd math > /dev/null
		cp -a libm.so "${D}"$(alt_libdir)/tls/${libmsofile} || die
		dosym ${libmsofile} $(alt_libdir)/tls/$(ls libm.so.*)
		popd > /dev/null

		librtsofile=$(basename "${D}"$(alt_libdir)/librt-*.so)
		pushd rt > /dev/null
		cp -a librt.so "${D}"$(alt_libdir)/tls/${librtsofile} || die
		dosym ${librtsofile} $(alt_libdir)/tls/$(ls librt.so.*)
		popd > /dev/null

		libthreaddbsofile=$(basename "${D}"$(alt_libdir)/libthread_db-*.so)
		pushd nptl_db > /dev/null
		cp -a libthread_db.so "${D}"$(alt_libdir)/tls/${libthreaddbsofile} || die
		dosym ${libthreaddbsofile} $(alt_libdir)/tls/$(ls libthread_db.so.*)
		popd > /dev/null

		libpthreadsofile=libpthread-${GLIBC_RELEASE_VER}.so
		cp -a nptl/libpthread.so "${D}"$(alt_libdir)/tls/${libpthreadsofile} || die
		dosym ${libpthreadsofile} $(alt_libdir)/tls/libpthread.so.0

		# and now for the static libs
		mkdir -p "${D}"$(alt_usrlibdir)/nptl
		cp -a libc.a nptl/libpthread.a nptl/libpthread_nonshared.a rt/librt.a \
			"${D}"$(alt_usrlibdir)/nptl

		# linker script crap
		for lib in libc libpthread; do
			sed -e "s:$(alt_libdir)/${lib}.so:$(alt_libdir)/tls/${lib}.so:g" \
			    -e "s:$(alt_usrlibdir)/${lib}_nonshared.a:$(alt_usrlibdir)/nptl/${lib}_nonshared.a:g" \
			          "${D}"$(alt_usrlibdir)/${lib}.so \
				> "${D}"$(alt_usrlibdir)/nptl/${lib}.so

			chmod 755 "${D}"$(alt_usrlibdir)/nptl/${lib}.so
		done

		dosym ../librt.so $(alt_usrlibdir)/nptl/librt.so

		# last but not least... headers.
		mkdir -p "${D}"/nptl "${D}"$(alt_headers)/nptl
		make install_root="${D}"/nptl install-headers PARALLELMFLAGS="${MAKEOPTS} -j1"
		pushd "${D}"/nptl/$(alt_headers) > /dev/null
		for i in $(find . -type f) ; do
			if ! [[ -f ${D}$(alt_headers)/$i ]] \
			   || ! cmp -s $i ${D}$(alt_headers)/$i; then
				mkdir -p ${D}$(alt_headers)/nptl/`dirname $i`
				cp -a $i ${D}$(alt_headers)/nptl/$i
			fi
		done
		popd > /dev/null
		rm -rf ${D}/nptl
	fi

	if use pic && [[ $(tc-arch) != "amd64" ]] ; then
		find ${S}/${buildtarget}/ -name "soinit.os" -exec cp {} ${D}$(alt_libdir)/soinit.o \;
		find ${S}/${buildtarget}/ -name "sofini.os" -exec cp {} ${D}$(alt_libdir)/sofini.o \;
		find ${S}/${buildtarget}/ -name "*_pic.a" -exec cp {} ${D}$(alt_libdir) \;
		find ${S}/${buildtarget}/ -name "*.map" -exec cp {} ${D}$(alt_libdir) \;

		for i in ${D}$(alt_libdir)/*.map; do
			mv ${i} ${i%.map}_pic.map
		done
	fi

	# We'll take care of the cache ourselves
	rm -f ${D}/etc/ld.so.cache

	# Some things want this, notably ash.
	dosym libbsd-compat.a $(alt_usrlibdir)/libbsd.a

	# Handle includes for different ABIs
	prep_ml_includes $(alt_headers)

	#################################################################
	# EVERYTHING AFTER THIS POINT IS FOR NATIVE GLIBC INSTALLS ONLY #
	# Make sure we install the sys-include symlink so that when
	# we build a 2nd stage cross-compiler, gcc finds the target
	# system headers correctly.  See gcc/doc/gccinstall.info
	if is_crosscompile ; then
		dosym include $(alt_prefix)/sys-include
		dosym . $(alt_prefix)/usr
		return 0
	fi

	# Everything past this point just needs to be done once... don't waste time building locale files twice...
	is_final_abi || return 0

	if want_linuxthreads ; then
		MYMAINBUILDDIR=build-${ABI}-${CTARGET}-linuxthreads
	else
		MYMAINBUILDDIR=build-${ABI}-${CTARGET}-nptl
	fi
	cd "${WORKDIR}"/${MYMAINBUILDDIR}
	if ! use build ; then
		if ! has noinfo ${FEATURES} && [[ ${GLIBC_INFOPAGE_VERSION} != "none" ]] ; then
			einfo "Installing info pages..."

			make PARALLELMFLAGS="${MAKEOPTS} -j1" \
				install_root=${D} \
				info -i
		fi

		setup_locales

		if [[ ${GLIBC_MANPAGE_VERSION} != "none" ]] ; then
			einfo "Installing man pages..."

			# Install linuxthreads man pages even if nptl is enabled
			cd "${WORKDIR}"/man
			doman *.3thr
		fi

		# Install nscd config file
		insinto /etc
		doins ${FILESDIR}/nscd.conf
		doins "${FILESDIR}"/nsswitch.conf

		doinitd "${FILESDIR}"/nscd

		cd ${S}
		dodoc BUGS ChangeLog* CONFORMANCE FAQ INTERFACE NEWS NOTES PROJECTS README*
	else
		rm -rf ${D}/usr/share
		for dir in $(get_all_libdirs); do
			rm -rf ${D}/usr/${dir}/gconv &> /dev/null
		done

		einfo "Installing Timezone data..."
		make PARALLELMFLAGS="${MAKEOPTS} -j1" \
			install_root=${D} \
			timezone/install-others || die
	fi

	# Is this next line actually needed or does the makefile get it right?
	# It previously has 0755 perms which was killing things.
	fperms 4711 $(alt_prefix)/lib/misc/glibc/pt_chown

	# Prevent overwriting of the /etc/localtime symlink.  We'll handle the
	# creation of the "factory" symlink in pkg_postinst().
	rm -f ${D}/etc/localtime

	insinto /etc
	# This is our new config file for building locales
	doins ${FILESDIR}/locales.build
	# example host.conf with multicast dns disabled by default
	doins ${FILESDIR}/2.3.4/host.conf

	# simple test to make sure our new glibc isnt completely broken.
	# for now, skip the multilib scenario.  also make sure we don't
	# test with statically built binaries since they will fail.
	[[ ${CBUILD} != ${CHOST} ]] && return 0
	[[ $(get_libdir) != "lib" ]] && return 0
	for x in date env ls true uname ; do
		x=$(type -p ${x})
		[[ -z ${x} ]] && continue
		striptest=$(file -L ${x} 2>/dev/null)
		[[ -z ${striptest} ]] && continue
		[[ ${striptest/statically linked} != "${striptest}" ]] && continue
		"${D}"/$(get_libdir)/ld-*.so \
			--library-path "${D}"/$(get_libdir) \
			${x} > /dev/null \
			|| die "simple run test (${x}) failed"
	done
}

toolchain-glibc_pkg_postinst() {
	# Mixing nptlonly and -nptlonly glibc can prove dangerous if libpthread
	# isn't removed in unmerge which happens sometimes.  See bug #87671
	if ! is_crosscompile && want_linuxthreads ; then
		for libdir in $(get_all_libdirs) ; do
			for f in ${ROOT}/${libdir}/libpthread-2.* ${ROOT}/${libdir}/libpthread-0.6* ; do
				if [[ -f ${f} ]] ; then
					rm -f ${f}
					ldconfig
				fi
			done
		done
	fi

	if ! is_crosscompile && [ -x "${ROOT}/usr/sbin/iconvconfig" ] ; then
		# Generate fastloading iconv module configuration file.
		${ROOT}/usr/sbin/iconvconfig --prefix=${ROOT}
	fi

	if [ ! -e "${ROOT}/lib/ld.so.1" ] && use ppc64 && ! has_multilib_profile ; then
		## SHOULDN'T THIS BE lib64??
		ln -s ld64.so.1 ${ROOT}/lib/ld.so.1
	fi

	# Reload init ...
	if ! is_crosscompile && [ "${ROOT}" = "/" ] ; then
		/sbin/telinit U &> /dev/null
	fi

	# warn the few multicast-dns-by-default users we've had about the change
	# in behavior...
	echo
	einfo "Gentoo's glibc now disables multicast dns by default in our"
	einfo "example host.conf. To re-enable this functionality, simply"
	einfo "remove the line that disables it (mdns off)."
	echo

	if want_nptl && want_linuxthreads ; then
		einfo "The default behavior of glibc on your system is to use NPTL.  If"
		einfo "you want to use linuxthreads for a particular program, start it"
		einfo "by executing 'LD_ASSUME_KERNEL=${LT_KERNEL_VERSION} <program> [<options>]'"
		echo
	fi
}

### SUPPORT FUNCTIONS ###
# We need to be able to set alternative headers for
# compiling for non-native platform
# Will also become useful for testing kernel-headers without screwing up
# the whole system.
# note: intentionally undocumented.
alt_headers() {
	if [[ -z ${ALT_HEADERS} ]] ; then
		if is_crosscompile ; then
			ALT_HEADERS="/usr/${CTARGET}/include"
		else
			ALT_HEADERS="/usr/include"
		fi
	fi
	echo "${ALT_HEADERS}"
}
alt_build_headers() {
	if [[ -z ${ALT_BUILD_HEADERS} ]] ; then
		ALT_BUILD_HEADERS=$(alt_headers)
		tc-is-cross-compiler && ALT_BUILD_HEADERS=${ROOT}$(alt_headers)
	fi
	echo "${ALT_BUILD_HEADERS}"
}

alt_prefix() {
	if is_crosscompile ; then
		echo /usr/${CTARGET}
	else
		echo /usr
	fi
}

alt_libdir() {
	if is_crosscompile ; then
		echo /usr/${CTARGET}/$(get_libdir)
	else
		echo /$(get_libdir)
	fi
}

alt_usrlibdir() {
	if is_crosscompile ; then
		echo /usr/${CTARGET}/$(get_libdir)
	else
		echo /usr/$(get_libdir)
	fi
}

setup_flags() {
	# Make sure host make.conf doesn't pollute us
	if is_crosscompile || tc-is-cross-compiler ; then
		CHOST=${CTARGET} strip-unsupported-flags
	fi

	# Store our CFLAGS because it's changed depending on which CTARGET
	# we are building when pulling glibc on a multilib profile
	CFLAGS_BASE=${CFLAGS_BASE-${CFLAGS}}
	CFLAGS=${CFLAGS_BASE}
	ASFLAGS_BASE=${ASFLAGS_BASE-${ASFLAGS}}
	ASFLAGS=${ASFLAGS_BASE}

	# Over-zealous CFLAGS can often cause problems.  What may work for one
	# person may not work for another.  To avoid a large influx of bugs
	# relating to failed builds, we strip most CFLAGS out to ensure as few
	# problems as possible.
	strip-flags
	strip-unsupported-flags
	filter-flags -m32 -m64 -mabi=*

	unset CBUILD_OPT CTARGET_OPT
	if has_multilib_profile ; then
		CTARGET_OPT=$(get_abi_CTARGET)
		[[ -z ${CTARGET_OPT} ]] && CTARGET_OPT=$(get_abi_CHOST)
	fi

	case $(tc-arch) in
		amd64)
			# Punt this when amd64's 2004.3 is removed
			CFLAGS_x86="-m32"
		;;
		ppc)
			append-flags "-freorder-blocks"
		;;
		sparc)
			# Both sparc and sparc64 can use -fcall-used-g6.  -g7 is bad, though.
			filter-flags "-fcall-used-g7"
			append-flags "-fcall-used-g6"
			filter-flags "-mvis"

			if is_crosscompile || [[ ${PROFILE_ARCH} == "sparc64" ]] || { has_multilib_profile && ! tc-is-cross-compiler; } ; then
				case ${ABI} in
					sparc64)
						filter-flags -Wa,-xarch -Wa,-A

						if is-flag "-mcpu=ultrasparc3"; then
							CTARGET_OPT="sparc64b-unknown-linux-gnu"
							append-flags "-Wa,-xarch=v9b"
							export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9b"
						else
							CTARGET_OPT="sparc64-unknown-linux-gnu"
							append-flags "-Wa,-xarch=v9a"
							export ASFLAGS="${ASFLAGS} -Wa,-xarch=v9a"
						fi
					;;
					*)
						if is-flag "-mcpu=ultrasparc3"; then
							CTARGET_OPT="sparcv9b-unknown-linux-gnu"
						else
							CTARGET_OPT="sparcv9-unknown-linux-gnu"
						fi
					;;
				esac
			else
				if is-flag "-mcpu=ultrasparc3"; then
					CTARGET_OPT="sparcv9b-unknown-linux-gnu"
				elif { is_crosscompile && want_nptl; } || is-flag "-mcpu=ultrasparc2" || is-flag "-mcpu=ultrasparc"; then
					CTARGET_OPT="sparcv9-unknown-linux-gnu"
				fi
			fi
		;;
	esac

	if [[ -n ${CTARGET_OPT} && ${CBUILD} == ${CHOST} ]] && ! is_crosscompile; then
		CBUILD_OPT=${CTARGET_OPT}
	fi

	if $(tc-getCC ${CTARGET}) -v 2>&1 | grep -q 'gcc version 3.[0123]'; then
		append-flags -finline-limit=2000
	fi

	# We don't want these flags for glibc
	filter-ldflags -pie

	# Lock glibc at -O2 -- linuxthreads needs it and we want to be
	# conservative here
	filter-flags -O?
	append-flags -O2
}

check_kheader_version() {
	local header="$(alt_build_headers)/linux/version.h"

	[[ -z $1 ]] && return 1

	if [ -f "${header}" ] ; then
		local version="`grep 'LINUX_VERSION_CODE' ${header} | \
			sed -e 's:^.*LINUX_VERSION_CODE[[:space:]]*::'`"

		if [ "${version}" -ge "$1" ] ; then
			return 0
		fi
	fi

	return 1
}

check_nptl_support() {
	local min_kernel_version="$(KV_to_int "${NPTL_KERNEL_VERSION}")"

	echo

	einfon "Checking gcc for __thread support ... "
	if want__thread ; then
		echo "yes"
	else
		echo "no"
		echo
		eerror "Could not find a gcc that supports the __thread directive!"
		eerror "please update to gcc-3.2.2-r1 or later, and try again."
		die "No __thread support in gcc!"
	fi

	# Building fails on an non-supporting kernel
	einfon "Checking kernel version (>=${NPTL_KERNEL_VERSION}) ... "
	if [ "`get_KV`" -lt "${min_kernel_version}" ] ; then
		echo "no"
		echo
		eerror "You need a kernel of at least version ${NPTL_KERNEL_VERSION}"
		eerror "for NPTL support!"
		die "Kernel version too low!"
	else
		echo "yes"
	fi

	# Building fails with too low linux-headers
	einfon "Checking linux-headers version (>=${NPTL_KERNEL_VERSION}) ... "
	if ! check_kheader_version "${min_kernel_version}"; then
		echo "no"
		echo
		eerror "You need linux-headers of at least version ${NPTL_KERNEL_VERSION}"
		eerror "for NPTL support!"
		die "linux-headers version too low!"
	else
		echo "yes"
	fi

	echo
}

want_nptl() {
	want_tls || return 1
	use nptl || return 1

	# Archs that can use NPTL
	case $(tc-arch) in
		alpha|amd64|ia64|mips|ppc|ppc64|s390|sh|x86)
			return 0;
		;;
		sparc)
			# >= v9 is needed for nptl.
			[[ "${PROFILE_ARCH}" == "sparc" ]] && return 1
			return 0;
		;;
	esac

	return 1
}

want_linuxthreads() {
	! use nptlonly && return 0
	want_nptl || return 0
	return 1
}

want_tls() {
	# Archs that can use TLS (Thread Local Storage)
	case $(tc-arch) in
		alpha|amd64|ia64|mips|ppc|ppc64|s390|sh)
			return 0;
		;;
		sparc)
			# 2.3.6 should have tls support on sparc64
			# when using newer binutils
			case ${CTARGET/-*} in
				sparc64*) return 1 ;;
				*) return 0 ;;
			esac
		;;
		x86)
			# requires i486 or better #106556
			[[ ${CTARGET} == i[4567]86* ]] && return 0
		;;
	esac

	return 1
}

want__thread() {
	want_tls || return 1

	# For some reason --with-tls --with__thread is causing segfaults on sparc32.
	[[ ${PROFILE_ARCH} == "sparc" ]] && return 1

	[[ -n ${WANT__THREAD} ]] && return ${WANT__THREAD}

	$(tc-getCC ${CTARGET}) -c ${FILESDIR}/test-__thread.c -o ${T}/test2.o &> /dev/null
	WANT__THREAD=$?

	return ${WANT__THREAD}
}

install_locales() {
	unset LANGUAGE LANG LC_ALL
	cd "${WORKDIR}"/${MYMAINBUILDDIR} || die "${WORKDIR}/${MYMAINBUILDDIR}"
	make PARALLELMFLAGS="${MAKEOPTS} -j1" \
		install_root=${D} localedata/install-locales || die
}

setup_locales() {
	if use !userlocales ; then
		einfo "userlocales not enabled, installing -ALL- locales..."
		install_locales || die
	elif [ -e /etc/locales.build ] ; then
		einfo "Installing locales in /etc/locales.build..."
		echo 'SUPPORTED-LOCALES=\' > SUPPORTED.locales
		cat /etc/locales.build | grep -v -e ^$ -e ^\# | sed 's/$/\ \\/g' \
			>> SUPPORTED.locales
		cat SUPPORTED.locales > ${S}/localedata/SUPPORTED || die
		install_locales || die
	elif [ -e ${FILESDIR}/locales.build ] ; then
		einfo "Installing locales in ${FILESDIR}/locales.build..."
		echo 'SUPPORTED-LOCALES=\' > SUPPORTED.locales
		cat ${FILESDIR}/locales.build | grep -v -e ^$ -e ^\# | sed 's/$/\ \\/g' \
			>> SUPPORTED.locales
		cat SUPPORTED.locales > ${S}/localedata/SUPPORTED || die
		install_locales || die
	else
		einfo "Installing -ALL- locales..."
		install_locales || die
	fi
}

glibc_do_configure() {
	local myconf

	# These should not be set, else the
	# zoneinfo do not always get installed ...
	unset LANGUAGE LANG LC_ALL
	# silly users
	unset LD_RUN_PATH

	# set addons
	pushd ${S} > /dev/null
	ADDONS=$(echo */configure | sed -e 's!/configure!!g;s!\(linuxthreads\|nptl\|rtkaio\|glibc-compat\)\( \|$\)!!g;s! \+$!!;s! !,!g;s!^!,!;/^,\*$/d')
	use glibc-compat20 && [[ -d glibc-compat ]] && ADDONS="${ADDONS},glibc-compat"
	popd > /dev/null

	use nls || myconf="${myconf} --disable-nls"
	use erandom || myconf="${myconf} --disable-dev-erandom"

	use glibc-omitfp && myconf="${myconf} --enable-omitfp"

	[[ ${CTARGET} == *-softfloat-* ]] && myconf="${myconf} --without-fp"

	if [ "$1" == "linuxthreads" ] ; then
		if want_tls && [[ ${CTARGET} != i[45]86-* ]] ; then
			myconf="${myconf} --with-tls"

			if want__thread && use linuxthreads-tls ; then
				myconf="${myconf} --with-__thread"
			else
				myconf="${myconf} --without-__thread"
			fi
		else
			myconf="${myconf} --without-tls --without-__thread"
		fi

		myconf="${myconf} --enable-add-ons=linuxthreads${ADDONS}"
		myconf="${myconf} --enable-kernel=${LT_KERNEL_VERSION}"
	elif [ "$1" == "nptl" ] ; then
		myconf="${myconf} --with-tls --with-__thread"
		myconf="${myconf} --enable-add-ons=nptl${ADDONS}"
		myconf="${myconf} --enable-kernel=${NPTL_KERNEL_VERSION}"
	else
		die "invalid pthread option"
	fi

	# Since SELinux support is only required for nscd, only enable it if:
	# 1. USE selinux
	# 2. ! USE build
	# 3. only for the primary ABI on multilib systems
	if use selinux && ! use build; then
		if use multilib || has_multilib_profile; then
			if is_final_abi; then
				myconf="${myconf} --with-selinux"
			else
				myconf="${myconf} --without-selinux"
			fi
		else
			myconf="${myconf} --with-selinux"
		fi
	else
		myconf="${myconf} --without-selinux"
	fi

	# Pick out the correct location for build headers
	myconf="${myconf}
		--without-cvs
		--enable-bind-now
		--build=${CBUILD_OPT:-${CBUILD}}
		--host=${CTARGET_OPT:-${CTARGET}}
		$(use_enable profile)
		--without-gd
		--with-headers=$(alt_build_headers)
		--prefix=$(alt_prefix)
		--mandir=$(alt_prefix)/share/man
		--infodir=$(alt_prefix)/share/info
		--libexecdir=$(alt_prefix)/lib/misc/glibc
		${EXTRA_ECONF}"

	has_version app-admin/eselect-compiler || export CC="$(tc-getCC ${CTARGET})"

	GBUILDDIR=${WORKDIR}/build-${ABI}-${CTARGET}-$1
	mkdir -p ${GBUILDDIR}
	cd ${GBUILDDIR}
	einfo "Configuring GLIBC for $1 with: ${myconf// /\n\t\t}"
	${S}/configure ${myconf} || die "failed to configure glibc"
}

fix_lib64_symlinks() {
	# the original Gentoo/AMD64 devs decided that since 64bit is the native
	# bitdepth for AMD64, lib should be used for 64bit libraries. however,
	# this ignores the FHS and breaks multilib horribly... especially
	# since it wont even work without a lib64 symlink anyways. *rolls eyes*
	# see bug 59710 for more information.
	# Travis Tilley <lv@gentoo.org> (08 Aug 2004)
	if [ -L ${ROOT}/lib64 ] ; then
		ewarn "removing /lib64 symlink and moving lib to lib64..."
		ewarn "dont hit ctrl-c until this is done"
		addwrite ${ROOT}/
		rm ${ROOT}/lib64
		# now that lib64 is gone, nothing will run without calling ld.so
		# directly. luckily the window of brokenness is almost non-existant
		use amd64 && /lib/ld-linux-x86-64.so.2 /bin/mv ${ROOT}/lib ${ROOT}/lib64
		use ppc64 && /lib/ld64.so.1 /bin/mv ${ROOT}/lib ${ROOT}/lib64
		# all better :)
		ldconfig
		ln -s lib64 ${ROOT}/lib
		einfo "done! :-)"
		einfo "fixed broken lib64/lib symlink in ${ROOT}"
	fi
	if [ -L ${ROOT}/usr/lib64 ] ; then
		addwrite ${ROOT}/usr
		rm ${ROOT}/usr/lib64
		mv ${ROOT}/usr/lib ${ROOT}/usr/lib64
		ln -s lib64 ${ROOT}/usr/lib
		einfo "fixed broken lib64/lib symlink in ${ROOT}/usr"
	fi
	if [ -L ${ROOT}/usr/X11R6/lib64 ] ; then
		addwrite ${ROOT}/usr/X11R6
		rm ${ROOT}/usr/X11R6/lib64
		mv ${ROOT}/usr/X11R6/lib ${ROOT}/usr/X11R6/lib64
		ln -s lib64 ${ROOT}/usr/X11R6/lib
		einfo "fixed broken lib64/lib symlink in ${ROOT}/usr/X11R6"
	fi
}

use_multilib() {
	case ${CTARGET} in
		sparc64*|mips64*|x86_64*|powerpc64*|s390x*)
			has_multilib_profile || use multilib ;;
		*)  false ;;
	esac
}

# Setup toolchain variables that would be defined in the profiles for these archs.
setup_env() {
	if is_crosscompile || tc-is-cross-compiler ; then
		multilib_env ${CTARGET}
		if ! use multilib ; then
			MULTILIB_ABIS=${DEFAULT_ABI}
		else
			MULTILIB_ABIS=${MULTILIB_ABIS:-${DEFAULT_ABI}}
		fi

		# If the user has CFLAGS_<CTARGET> in their make.conf, use that,
		# and fall back on CFLAGS.
		local VAR=CFLAGS_${CTARGET//[-.]/_}
		CFLAGS=${!VAR-${CFLAGS}}
	fi

	setup_flags

	export ABI=${ABI:-${DEFAULT_ABI:-default}}

	if is_crosscompile || tc-is-cross-compiler ; then
		local VAR=CFLAGS_${ABI}
		# We need to export CFLAGS with abi information in them because
		# glibc's configure script checks CFLAGS for some targets (like mips)
		export CFLAGS="${!VAR} ${CFLAGS}"
	fi
}

### /ECLASS PUNTAGE ###

if is_crosscompile ; then
	SLOT="${CTARGET}-2.2"
else
	SLOT="2.2"
fi

# we'll handle stripping ourself #46186
RESTRICT="strip"
EMULTILIB_PKG="true"

# We need new cleanup attribute support from gcc for NPTL among things ...
# We also need linux26-headers if using NPTL. Including kernel headers is
# incredibly unreliable, and this new linux-headers release from plasmaroo
# should work with userspace apps, at least on amd64 and ppc64.
#
# We need a new-enough binutils for as-needed
DEPEND=">=sys-devel/gcc-3.2.3-r1
	nptl? ( >=sys-devel/gcc-3.3.1-r1 >=sys-kernel/linux-headers-${NPTL_KERNEL_VERSION} )
	>=sys-devel/binutils-2.15
	>=sys-devel/gcc-config-1.3.9
	virtual/os-headers
	nls? ( sys-devel/gettext )
	selinux? ( !build? ( sys-libs/libselinux ) )"
RDEPEND="nls? ( sys-devel/gettext )
	selinux? ( !build? ( sys-libs/libselinux ) )"

if [[ ${CATEGORY/cross-} != ${CATEGORY} ]] ; then
	DEPEND="${DEPEND} ${CATEGORY}/gcc"

	if [[ ${CATEGORY} == *-linux* ]] ; then
		if [[ ${CATEGORY/mips} != ${CATEGORY} ]] ; then
			DEPEND="${DEPEND} >=${CATEGORY}/mips-headers-2.6.10"
		else
			DEPEND="${DEPEND} ${CATEGORY}/linux-headers"
		fi
	fi
else
	DEPEND="${DEPEND} sys-libs/timezone-data"
	RDEPEND="${RDEPEND} sys-libs/timezone-data"
fi

pkg_setup() {
	# prevent native builds from downgrading ... maybe update to allow people
	# to change between diff -r versions ? (2.3.6-r4 -> 2.3.6-r2)
	if ! is_crosscompile && ! tc-is-cross-compiler ; then
		if has_version '>'${CATEGORY}/${PF} ; then
			eerror "Sanity check to keep you from breaking your system:"
			eerror " Downgrading glibc is not supported and a sure way to destruction"
			die "aborting to save your system"
		fi
	fi

	if use nptlonly && ! use nptl ; then
		eerror "If you want nptlonly, add nptl to your USE too ;p"
		die "nptlonly without nptl"
	fi

	# give some sort of warning about the nptl logic changes...
	if want_nptl && want_linuxthreads ; then

		ewarn "Warning! Gentoo's GLIBC with NPTL enabled now behaves like the"
		ewarn "glibc from almost every other distribution out there. This means"
		ewarn "that glibc is compiled -twice-, once with linuxthreads and once"
		ewarn "with nptl. The NPTL version is installed to lib/tls and is still"
		ewarn "used by default. If you do not need nor want the linuxthreads"
		ewarn "fallback, you can disable this behavior by adding nptlonly to"
		ewarn "USE to save yourself some compile time."

		ebeep
		epause 5
	fi
}

src_unpack() {
	setup_env

	case $(tc-arch) in
		hppa)
			GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 2000-all-2.3.2-propolice-guard-functions-v3.patch"
			use hardened || GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 6490_hppa_hardened-disable__init_arrays.patch"
		;;
		mips)
			GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 3000-all-2.3.4-dl_execstack-PaX-support.patch"
			use_multilib \
				&& GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 6680_mips_nolib3264.patch" \
				|| GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 5005_all_enable-multilib-with-cross-compile.patch"
		;;
		amd64)
			if ! has_multilib_profile && ! is_crosscompile ; then
				# the gentoo-libdir patch hack conflicts with these
				GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 5005_all_enable-multilib-with-cross-compile.patch"
			fi
		;;
	esac

	GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 5020_all_nomalloccheck.patch"

	toolchain-glibc_src_unpack

	# XXX: do not package ssp up into tarballs, leave it in FILESDIR
	cd "${S}"
	cp "${FILESDIR}"/2.3.5/ssp.c sysdeps/unix/sysv/linux/ || die "could not find ssp.c"
	rm -f "${WORKDIR}"/patches/2*
	epatch "${FILESDIR}"/2.3.5/glibc-2.3.5-propolice-guard-functions.patch
	epatch "${FILESDIR}"/2.3.5/glibc-2.3.5-frandom-detect.patch

	case $(tc-arch) in
		alpha)
			# Is this still needed?
			rm -f sysdeps/alpha/alphaev6/memcpy.S
		;;
		amd64)
			if ! has_multilib_profile && ! is_crosscompile; then
				# CONF_LIBDIR support
				epatch ${FILESDIR}/2.3.4/glibc-gentoo-libdir.patch
				sed -i -e "s:@GENTOO_LIBDIR@:$(get_libdir):g" ${S}/sysdeps/unix/sysv/linux/configure
			fi
		;;
		ppc64)
			# setup lib -- seems like a good place to set this up
			has_multilib_profile || get_libdir_override lib64
		;;
	esac

	# Glibc is stupid sometimes, and doesn't realize that with a
	# static C-Only gcc, -lgcc_eh doesn't exist.
	# http://sources.redhat.com/ml/libc-alpha/2003-09/msg00100.html
	# http://sourceware.org/ml/libc-alpha/2005-02/msg00042.html
	echo 'int main(){}' > ${T}/gcc_eh_test.c
	if ! $(tc-getCC ${CTARGET}) ${T}/gcc_eh_test.c -lgcc_eh 2>/dev/null ; then
		sed -i -e 's:-lgcc_eh::' Makeconfig || die "sed gcc_eh"
	fi

	# Some configure checks fail on the first emerge through because they
	# try to link.  This doesn't work well if we don't have a libc yet.
	# http://sourceware.org/ml/libc-alpha/2005-02/msg00042.html
	if is_crosscompile && use build; then
		rm ${S}/sysdeps/sparc/sparc64/elf/configure{,.in}
		rm ${S}/nptl/sysdeps/pthread/configure{,.in}
	fi

	cd "${WORKDIR}"
	find . -type f '(' -size 0 -o -name "*.orig" ')' -exec rm -f {} \;
	find . -name configure -exec touch {} \;

	# Fix permissions on some of the scripts
	chmod u+x "${S}"/scripts/*.sh
}

src_compile() {
	setup_env

	if [[ -z ${OABI} ]] ; then
		local abilist=""
		if has_multilib_profile ; then
			abilist=$(get_install_abis)
			einfo "Building multilib glibc for ABIs: ${abilist}"
		elif is_crosscompile || tc-is-cross-compiler ; then
			abilist=${DEFAULT_ABI}
		fi
		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
}

src_test() {
	setup_env

	if [[ -z ${OABI} ]] && has_multilib_profile ; then
		OABI=${ABI}
		einfo "Testing multilib glibc for ABIs: $(get_install_abis)"
		for ABI in $(get_install_abis) ; do
			export ABI
			einfo "   Testing ${ABI} glibc"
			src_test
		done
		ABI=${OABI}
		unset OABI
		return 0
	fi

	toolchain-glibc_src_test
}

src_strip() {
	# Now, strip everything but the thread libs #46186, as well as the dynamic
	# linker, else we cannot set breakpoints in shared libraries due to bugs in
	# gdb.  Also want to grab stuff in tls subdir.  whee.
#when new portage supports this ...
#	env \
#		-uRESTRICT \
#		CHOST=${CTARGET} \
#		STRIP_MASK="/*/{,tls/}{ld-,lib{pthread,thread_db}}*" \
#		prepallstrip
	pushd "${D}" > /dev/null

	if ! is_crosscompile ; then
		mkdir -p "${T}"/strip-backup
		for x in $(find "${D}" -maxdepth 3 \
		           '(' -name 'ld-*' -o -name 'libpthread*' -o -name 'libthread_db*' ')' \
		           -a '(' '!' -name '*.a' ')' -type f -printf '%P ')
		do
			mkdir -p "${T}/strip-backup/${x%/*}"
			cp -a -- "${D}/${x}" "${T}/strip-backup/${x}" || die "backing up ${x}"
		done
	fi
	env -uRESTRICT CHOST=${CTARGET} prepallstrip
	if ! is_crosscompile ; then
		cp -a -- "${T}"/strip-backup/* "${D}"/ || die "restoring non-stripped libs"
	fi

	popd > /dev/null
}

src_install() {
	setup_env

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

	# Handle stupid lib32 BS
	unset OLD_LIBDIR
	if ! is_crosscompile ; then
		if [[ $(tc-arch) == "amd64" && ${ABI} == "x86" && $(get_libdir) != "lib" ]] ; then
			OLD_LIBDIR=$(get_libdir)
			LIBDIR_x86="lib"
		fi

		if [[ $(tc-arch) == "ppc64" && ${ABI} == "ppc" && $(get_libdir) != "lib" ]] ; then
			OLD_LIBDIR=$(get_libdir)
			LIBDIR_ppc="lib"
		fi
	fi

	toolchain-glibc_src_install
	[[ -z ${OABI} ]] && src_strip

	# Handle stupid lib32 BS on amd64 and ppc64
	if [[ -n ${OLD_LIBDIR} ]] ; then
		cd "${S}"
		[[ $(tc-arch) == "amd64" ]] && LIBDIR_x86=${OLD_LIBDIR}
		[[ $(tc-arch) == "ppc64" ]] && LIBDIR_ppc=${OLD_LIBDIR}
		unset OLD_LIBDIR

		mv "${D}"/lib "${D}"/$(get_libdir)
		mv "${D}"/usr/lib "${D}"/usr/$(get_libdir)
		dodir /lib
		dodir /usr/lib
		mv "${D}"/usr/$(get_libdir)/locale "${D}"/usr/lib
		[[ $(tc-arch) == "amd64" ]] && dosym ../$(get_libdir)/ld-linux.so.2 /lib/ld-linux.so.2
		[[ $(tc-arch) == "ppc64" ]] && dosym ../$(get_libdir)/ld.so.1 /lib/ld.so.1

		for f in "${D}"/usr/$(get_libdir)/*.so; do
			local basef=$(basename "${f}")
			if [[ -L ${f} ]] ; then
				local target=$(readlink "${f}")
				target=${target/\/lib\//\/$(get_libdir)\/}
				rm "${f}"
				dosym "${target}" /usr/$(get_libdir)/"${basef}"
			fi
		done

		dosed "s:/lib/:/$(get_libdir)/:g" /usr/$(get_libdir)/lib{c,pthread}.so

		if want_nptl && want_linuxthreads ; then
			dosed  "s:/lib/:/$(get_libdir)/:g" /usr/$(get_libdir)/nptl/lib{c,pthread}.so
		fi
	fi

	# PPC NPTL fix
	if [[ $(tc-arch) == "ppc" ]] && use nptl && ! use nptlonly ; then
		cp ${WORKDIR}/build-default-${CTARGET}-nptl/elf/ld.so ${D}/lib/ld-${PV}.so
	fi
}

pkg_preinst() {
	toolchain-glibc_pkg_preinst
}

pkg_postinst() {
	toolchain-glibc_pkg_postinst
}