# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-libs/glibc/glibc-2.3.6-r4.ebuild,v 1.33 2007/01/27 02:21:17 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 mips ppc ppc64 ~s390 sh sparc x86"

BRANCH_UPDATE=""

# Generated man pages
GLIBC_MANPAGE_VERSION="2.3.6-1"

# Generated stuff in manual subdir
GLIBC_INFOPAGE_VERSION="2.3.6"

# Gentoo patchset
PATCH_VER="1.17"

GENTOO_TOOLCHAIN_BASE_URI="mirror://gentoo"
GENTOO_TOOLCHAIN_DEV_URI="http://dev.gentoo.org/~azarah/glibc/XXX http://dev.gentoo.org/~vapier/dist/XXX"

### 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 build nptl nptlonly erandom hardened multilib selinux glibc-compat20 glibc-omitfp 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} ]]
}
just_headers() {
	is_crosscompile && use crosscompile_opts_headers-only
}

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=${NPTL_KERNEL_VERSION:-"2.6.9"}
LT_KERNEL_VERSION=${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
			${GENTOO_TOOLCHAIN_DEV_URI//XXX/glibc-${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
			${GENTOO_TOOLCHAIN_DEV_URI//XXX/glibc-${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
			${GENTOO_TOOLCHAIN_DEV_URI//XXX/glibc-manpages-${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
			${GENTOO_TOOLCHAIN_DEV_URI//XXX/glibc-infopages-${GLIBC_INFOPAGE_VERSION:-${GLIBC_RELEASE_VER}}.tar.bz2}"
	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

	if [[ -n ${PATCH_VER} ]] ; then
		cd "${WORKDIR}"
		unpack glibc-${PATCH_GLIBC_VER:-${GLIBC_RELEASE_VER}}-patches-${PATCH_VER}.tar.bz2
		# pull out all the addons
		local d
		for d in extra/*/configure ; do
			mv "${d%/configure}" "${S}" || die "moving ${d}"
		done
	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

	gnuconfig_update
}

toolchain-glibc_src_compile() {
	echo
	local v
	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}" || die "make for ${ABI} failed"
	fi
	if want_nptl ; then
		# ... and then do the optional nptl build
		unset LD_ASSUME_KERNEL
		glibc_do_configure nptl
		einfo "Building GLIBC with NPTL..."
		make PARALLELMFLAGS="${MAKEOPTS}" || die "make for ${ABI} failed"
	fi
}

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

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

	einfo "Configuring GLIBC headers with: ${myconf// /\n\t\t}"
	CC=gcc \
	CFLAGS="-O1 -pipe" \
	"${S}"/configure ${myconf} || die "failed to configure glibc"
}

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 ${ROOT}/etc/locale.gen ]] && rm -f "${D}"/etc/locale.gen
}

toolchain-glibc_src_install() {
	# These should not be set, else the
	# zoneinfo do not always get installed ...
	unset LANGUAGE LANG LC_ALL

	local GBUILDDIR
	if want_linuxthreads ; then
		GBUILDDIR=${WORKDIR}/build-${ABI}-${CTARGET}-linuxthreads
	else
		GBUILDDIR=${WORKDIR}/build-${ABI}-${CTARGET}-nptl
	fi

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

	if is_crosscompile ; then
		# punt all the junk not needed by a cross-compiler
		cd "${D}"/usr/${CTARGET} || die
		rm -rf ./{,usr/}{bin,etc,sbin,share} ./{,usr/}*/{gconv,misc}
	fi

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

		local l src_lib
		for l in libc libm librt libpthread libthread_db ; do
			# take care of shared lib first ...
			l=${l}.so
			if [[ -e ${l} ]] ; then
				src_lib=${l}
			else
				src_lib=$(eval echo */${l})
			fi
			cp -a ${src_lib} "${D}"$(alt_libdir)/tls/${l} || die "copying nptl ${l}"
			fperms a+rx $(alt_libdir)/tls/${l}
			dosym ${l} $(alt_libdir)/tls/$(scanelf -qSF'%S#F' ${src_lib})

			# then grab the linker script or the symlink ...
			if [[ -L ${D}$(alt_usrlibdir)/${l} ]] ; then
				dosym $(alt_libdir)/tls/${l} $(alt_usrlibdir)/nptl/${l}
			else
				sed \
					-e "s:/${l}:/tls/${l}:g" \
					-e "s:/${l/%.so/_nonshared.a}:/nptl/${l/%.so/_nonshared.a}:g" \
					"${D}"$(alt_usrlibdir)/${l} > "${D}"$(alt_usrlibdir)/nptl/${l}
			fi

			# then grab the static lib ...
			src_lib=${src_lib/%.so/.a}
			[[ ! -e ${src_lib} ]] && src_lib=${src_lib/%.a/_pic.a}
			cp -a ${src_lib} "${D}"$(alt_usrlibdir)/nptl/ || die "copying nptl ${src_lib}"
			src_lib=${src_lib/%.a/_nonshared.a}
			if [[ -e ${src_lib} ]] ; then
				cp -a ${src_lib} "${D}"$(alt_usrlibdir)/nptl/ || die "copying nptl ${src_lib}"
			fi
		done

		# use the nptl linker instead of the linuxthreads one as the linuxthreads
		# one may lack TLS support and that can be really bad for business
		cp -a elf/ld.so "${D}"$(alt_libdir)/$(scanelf -qSF'%S#F' elf/ld.so) || die "copying nptl interp"
	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)

	# When cross-compiling for a non-multilib setup, make sure we have
	# lib and a proper symlink setup
	if is_crosscompile && ! use multilib && ! has_multilib_profile && [[ $(get_libdir) != "lib" ]] ; then
		cd "${D}"$(alt_libdir)/..
		mv $(get_libdir) lib || die
		ln -s lib $(get_libdir) || die
		cd "${D}"$(alt_usrlibdir)/..
		mv $(get_libdir) lib || die
		ln -s lib $(get_libdir) || die
	fi

	#################################################################
	# EVERYTHING AFTER THIS POINT IS FOR NATIVE GLIBC INSTALLS ONLY #
	# Make sure we install some symlink hacks 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 usr/include /usr/${CTARGET}/sys-include
		return 0
	fi

	# Everything past this point just needs to be done once ...
	is_final_abi || return 0

	# Make sure the non-native interp can be found on multilib systems
	if has_multilib_profile ; then
		case $(tc-arch) in
			amd64)
				[[ ! -e ${D}/lib ]] && dosym $(get_abi_LIBDIR amd64) /lib
				dosym /$(get_abi_LIBDIR x86)/ld-linux.so.2 /lib/ld-linux.so.2
				;;
			ppc64)
				[[ ! -e ${D}/lib ]] && dosym $(get_abi_LIBDIR ppc64) /lib
				dosym /$(get_abi_LIBDIR ppc)/ld.so.1 /lib/ld.so.1
				;;
		esac
	fi

	# Files for Debian-style locale updating
	dodir /usr/share/i18n
	sed \
		-e "/^#/d" \
		-e "/SUPPORTED-LOCALES=/d" \
		-e "s: \\\\::g" -e "s:/: :g" \
		"${S}"/localedata/SUPPORTED > "${D}"/usr/share/i18n/SUPPORTED \
		|| die "generating /usr/share/i18n/SUPPORTED failed"
	cd "${WORKDIR}"/extra/locale
	dosbin locale-gen || die
	doman *.[0-8]
	insinto /etc
	doins locale.gen || die

	# Make sure all the ABI's can find the locales and so we only
	# have to generate one set
	keepdir /usr/$(get_libdir)/locale
	for l in $(get_all_libdirs) ; do
		if [[ ! -e ${D}/usr/${l}/locale ]] ; then
			dosym /usr/$(get_libdir)/locale /usr/${l}/locale
		fi
	done

	if ! has noinfo ${FEATURES} && [[ ${GLIBC_INFOPAGE_VERSION} != "none" ]] ; then
		einfo "Installing info pages..."

		make \
			-C "${GBUILDDIR}" \
			PARALLELMFLAGS="${MAKEOPTS} -j1" \
			install_root="${install_root}" \
			info -i || die
	fi

	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 misc network config files
	insinto /etc
	doins "${FILESDIR}"/nscd.conf
	doins "${FILESDIR}"/nsswitch.conf
	doins "${FILESDIR}"/2.3.6/host.conf
	doinitd "${FILESDIR}"/nscd

	cd "${S}"
	dodoc BUGS ChangeLog* CONFORMANCE FAQ INTERFACE NEWS NOTES PROJECTS README*

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

	# 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_headers_install() {
	local GBUILDDIR=${WORKDIR}/build-${ABI}-${CTARGET}-headers
	cd "${GBUILDDIR}"
	make install_root="${D}/usr/${CTARGET}" install-headers || die "install-headers failed"
	# Copy over headers that are not part of install-headers ... these
	# are pretty much taken verbatim from crosstool, see it for more details
	insinto $(alt_headers)/bits
	doins misc/syscall-list.h bits/stdio_lim.h || die "doins include bits"
	insinto $(alt_headers)/gnu
	doins "${S}"/include/gnu/stubs.h || die "doins include gnu"
	# 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
	dosym usr/include /usr/${CTARGET}/sys-include
}

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 && [[ ${ROOT} == "/" ]] ; 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 ! tc-is-cross-compiler && [[ -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

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

		# if the host locales.gen contains no entries, we'll install everything
		local locale_list="${ROOT}etc/locale.gen"
		if [[ -z $(locale-gen --list --config "${locale_list}") ]] ; then
			ewarn "Generating all locales; edit /etc/locale.gen to save time/space"
			locale_list="${ROOT}usr/share/i18n/SUPPORTED"
		fi
		locale-gen --config "${locale_list}"
	fi

	echo
	einfo "Gentoo's glibc no longer includes mdns."
	einfo "If you want mdns, emerge the sys-auth/nss-mdns package."
	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}/usr/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_libdir() {
	if is_crosscompile ; then
		echo /usr/${CTARGET}/$(get_libdir)
	else
		echo /$(get_libdir)
	fi
}

alt_usrlibdir() {
	if is_crosscompile ; then
		echo /usr/${CTARGET}/usr/$(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 dont want these flags for glibc
	filter-ldflags -pie

	# We cannot build glibc with Bdirect support
	filter-flags -Wl,-Bdirect
	filter-ldflags -Bdirect
	filter-ldflags -Wl,-Bdirect

	# Same for hashvals ...
	filter-flags -Wl,-hashvals
	filter-ldflags -hashvals
	filter-ldflags -Wl,-hashvals

	# 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

	ebegin "Checking gcc for __thread support"
	if ! eend $(want__thread ; echo $?) ; then
		echo
		eerror "Could not find a gcc that supports the __thread directive!"
		eerror "Please update your binutils/gcc and try again."
		die "No __thread support in gcc!"
	fi

	if ! is_crosscompile && ! tc-is-cross-compiler ; then
		# Building fails on an non-supporting kernel
		ebegin "Checking kernel version (>=${NPTL_KERNEL_VERSION})"
		if ! eend $([[ $(get_KV) -ge ${min_kernel_version} ]] ; echo $?) ; then
			echo
			eerror "You need a kernel of at least version ${NPTL_KERNEL_VERSION}"
			eerror "for NPTL support!"
			die "Kernel version too low!"
		fi
	fi

	# Building fails with too low linux-headers
	ebegin "Checking linux-headers version (>=${NPTL_KERNEL_VERSION})"
	if ! eend $(check_kheader_version "${min_kernel_version}" ; echo $?) ; then
		echo
		eerror "You need linux-headers of at least version ${NPTL_KERNEL_VERSION}"
		eerror "for NPTL support!"
		die "linux-headers version too low!"
	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}

	echo 'extern __thread int i;' > "${T}"/test-__thread.c
	$(tc-getCC ${CTARGET}) -c "${T}"/test-__thread.c -o "${T}"/test-__thread.o &> /dev/null
	WANT__THREAD=$?
	rm -f "${T}"/test-__thread.[co]

	return ${WANT__THREAD}
}

glibc_do_configure() {
	local myconf

	# 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')
	popd > /dev/null
	use glibc-compat20 && [[ -d glibc-compat ]] && ADDONS="${ADDONS},glibc-compat"

	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 [ "$1" == "linuxthreads" ] ; then
		if want_tls ; then
			myconf="${myconf} --with-tls"

			if want__thread && ! use glibc-compat20 ; 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

	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=/usr
		--libdir=/usr/$(get_libdir)
		--mandir=/usr/share/man
		--infodir=/usr/share/info
		--libexecdir=/usr/$(get_libdir)/misc/glibc
		${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)

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

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

	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="nostrip multilib-pkg-force"

# We need a new-enough binutils for as-needed
DEPEND="!ia64? ( >=sys-devel/gcc-3.4 )
	nptl? ( >=sys-kernel/linux-headers-${NPTL_KERNEL_VERSION} )
	>=sys-devel/binutils-2.15.94
	|| ( app-admin/eselect-compiler >=sys-devel/gcc-config-1.3.12 )
	>=app-misc/pax-utils-0.1.10
	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 [[ ${CATEGORY} == cross-mips* ]] ; then
			DEPEND="${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

	if [[ -e /proc/xen ]] && ! is-flag -mno-tls-direct-seg-refs ; then
		ewarn "You are using Xen but don't have -mno-tls-direct-seg-refs in your CFLAGS."
		ewarn "This will result in a 50% performance penalty, which is probably not what you want."
	fi

	if ! type -p scanelf > /dev/null ; then
		eerror "You do not have pax-utils installed."
		die "install pax-utils"
	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

	# Do not enable -Bdirect support for now.
	GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 2020_all_2.3.6-hashvals.patch"
	GLIBC_PATCH_EXCLUDE="${GLIBC_PATCH_EXCLUDE} 2030_all_2.3.6-bdirect.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}"/2.3.6/glibc-2.3.6-propolice-guard-functions.patch
	epatch "${FILESDIR}"/2.3.5/glibc-2.3.5-frandom-detect.patch

	# 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

	if just_headers ; then
		toolchain-glibc_headers_compile
	else
		toolchain-glibc_src_compile
	fi
}

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

	if just_headers ; then
		toolchain-glibc_headers_install
	else
		toolchain-glibc_src_install
	fi
	[[ -z ${OABI} ]] && src_strip
}

pkg_preinst() {
	toolchain-glibc_pkg_preinst
}

pkg_postinst() {
	toolchain-glibc_pkg_postinst
}
