# $Id$

PNAME="eglibc"
PVER="2.10.0_20091229"
PBUILD="r4"

PCATEGORIE="sys-libs"
STATE="unstable"

#DESCRIPTION="Embedded GNU libc6 (also called glibc2) C library with NPTL Threads."
HOMEPAGE="http://www.eglibc.org/"

#DEPEND="${SDEPEND}
#	>= sys-libs/libstdc++-4.3
#	>= virtual/base-files"

# we force headers to one specific version
# (for x86_64 2.6.12.0-r2 bi-arch headers are needed!)
SDEPEND="== sys-kernel/linux-libc-headers-2.6.31
	>= sys-libs/libstdc++-4.3
	>= virtual/base-files"

#PROVIDE="virtual/glibc"

# functions to include in the mage file
SPECIAL_FUNCTIONS="fix_db_files"

SRCFILE="${PNAME}-${PVER/.0/}.tar.bz2"
SRCDIR="${BUILDDIR}/${PNAME}-${PVER/.0/}/libc"

sminclude mtools cleanutils

SRC_URI=(
	gnu://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${SRCFILE}
	mirror://${PNAME}/nsswitch.conf
	mirror://${PNAME}/nscd.conf
	mirror://${PNAME}/eglibc.envd
	mirror://${PNAME}/locale-gen
	mirror://${PNAME}/locale.gen
)

# glibc don't like strong CFLAGS
export CFLAGS="${CFLAGS//-O?} -O2"
# glibc -> nptl thread don't like striping
NOSTRIP=true
# gcc 3.0 - 3.3 needs this:
export CFLAGS="${CFLAGS} -finline-limit=2000"
export CXXFLAGS="${CFLAGS}"
export LDFLAGS="${LDFLAGS//-Wl,--relax}"

# hack to fix NPTL issues with xen, only required on 32bit arches
if [[ ${ARCH} = i*86 ]]
then
	export CFLAGS="${CFLAGS} -mno-tls-direct-seg-refs"
fi

# glibc-2.6.1 and above needs march CFLAGS: -march=${ARCH} -mtune=generic
# first filter -mtune and -march from flags
for flag in ${CFLAGS}
do
	case ${flag} in
		-mtune=*) continue ;;
		-march=*) continue ;;
	esac
	newflags="${newflags} ${flag}"
done
# than add our defaults for glibc
export CFLAGS="${CFLAGS} -march=${ARCH} -mtune=generic"
export CXXFLAGS="${CFLAGS}"

# use other linux-headers
[[ -z ${ALT_HEADERS} ]] && export ALT_HEADERS="/usr/include"

# kernel support
export ENABLE_KERNEL=2.6.18

SPLIT_PACKAGES="eglibc eglibc-dev"

split_info_eglibc()
{
	DESCRIPTION="Embedded GNU libc6 (also called glibc2) C library with NPTL Threads."

	SDEPEND=">= sys-libs/libstdc++-4.3
		>= virtual/base-files"

	PROVIDE="virtual/glibc"

	preinstall()
	{
		# remove libmemusage and libpcprofile as these libs now
		# resides in /usr/lib and are symlinked to /lib
		if [[ -f ${MROOT}/$(mlibdir)/libmemusage.so ]]
		then
			rm ${MROOT}/$(mlibdir)/libmemusage.so
		fi

		if [[ -f ${MROOT}/$(mlibdir)/libpcprofile.so ]]
		then
			rm ${MROOT}/$(mlibdir)/libpcprofile.so
		fi
	}

	postinstall()
	{
		# first save the old libpthread.so.0;
		# it will later used to determinate that there are no stale
		# libpthreads that breaks ldconfig
		local OLD_PTHREAD
		OLD_PTHREAD="$(readlink ${MROOT}/$(mlibdir)/libpthread.so.0)"

		# slackware install method

		# we cannot easily install the glibc libs,
		# because our tools for cp etc needs them to run

		local file

		echo "     Switching to new glibc ..."
		# swap libraries on the fly:
		if [ -x /sbin/ldconfig -a -d /$(mlibdir)/incoming ] && [[ -z ${MROOT} ]]
		then
			# first create copies of the incoming libraries:
			cd /$(mlibdir)/incoming
			for file in $(find /$(mlibdir)/incoming -type f)
			do
				if [ ! -r "../$(basename ${file}).incoming" ]
				then
					cp -a ${file} ../$(basename ${file}).incoming
				fi
			done

			# then switch to them all at once:
			/sbin/ldconfig -l /$(mlibdir)/*.incoming 2> /dev/null

			# finally, rename them and clean up:
			cd /$(mlibdir)
			for file in *.incoming
			do
				rm -f $(basename ${file} .incoming)
				cp -a ${file} $(basename ${file} .incoming)
				/sbin/ldconfig -l $(basename ${file} .incoming)
				rm -f ${file}
			done

		# no ldconfig?
		# good, it's safe to just jam it on home (and make links below):
		else
			(
				cd ${MROOT}/$(mlibdir)/incoming
				for file in *
				do
					cp -a ${file} ..
				done

				local my_sym
				local my_dest

				# rebuild symlinks
				echo "     Recreating Symlinks:"
				for i in $(find ${MROOT}/$(mlibdir)/incoming -type l)
				do
					my_sym="$(readlink ${i})"
					my_dest="$(basename ${i})"

					echo "       ${my_dest} -> ${my_dest}"

					# assure to remove the old ones;
					[ -L ${MROOT}/$(mlibdir)/"${my_dest}" ] && \
						rm ${MROOT}/$(mlibdir)/"${my_dest}"

					ln -snf "${my_sym}" ${MROOT}/$(mlibdir)/"${my_dest}"
				done
			)
		fi

		# now, get rid of the temporary directory:
		rm -rf ${MROOT}/$(mlibdir)/incoming

		# remove stale nptl libpthread-2.?.?.so,
		# fix only needed for glibc with linuxthreads;
		# prevent reloc errors such as:
		#    ls: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory

		# get our new libpthread.so.0
		local NEW_PTHREAD
		NEW_PTHREAD="$(readlink ${MROOT}/$(mlibdir)/libpthread.so.0)"

		if [ "${NEW_PTHREAD}" != "${OLD_PTHREAD}" ]
		then
			echo "     Removing stale libpthread libraries ..."
			for file in ${MROOT}/$(mlibdir)/libpthread-*
			do
				if [ "$(basename ${file})" != "${NEW_PTHREAD}" ]
				then
					rm -f ${file}
				fi
			done

			#rm -f /lib/${OLD_PTHREAD}

			ln -snf ${NEW_PTHREAD} ${MROOT}/$(mlibdir)/libpthread.so.0
		fi

		if [ -x /usr/sbin/iconvconfig ]
		then
			# generate fastloading iconv module configuration file.
			echo "     Generate iconv module config ..."
			/usr/sbin/iconvconfig --prefix=${MROOT}/
		fi

	# not working with busybox
	if [[ $(basename $(readlink /sbin/init)) != busybox ]]
	then
		# reloading init
		echo "     Reloading init ..."
		[[ -z ${MROOT} ]] && /sbin/init U &> /dev/null
	fi

		if [[ -x /usr/sbin/locale-gen ]] && [[ -z ${MROOT} ]]
		then
			# generating user def locales
			echo "     Generating user defined locales ..."
			/usr/sbin/locale-gen
		fi

		# now we must fix the mage db files
		# to stop the annoying errors messages
		fix_db_files
	}

}

split_info_eglibc-dev()
{
	DESCRIPTION="Development files for ${PCATEGORE}/${PNAME}-${PVER}-${PBUILD}."
	SDEPEND=">= ${PCATEGORIE}/${PNAME}-${PVER}"

	postinstall()
	{
	
		if [ -x /usr/sbin/iconvconfig ]
		then
			# generate fastloading iconv module configuration file.
			echo "     Generate iconv module config ..."
			/usr/sbin/iconvconfig --prefix=${MROOT}/
		fi

	# not working with busybox
	if [[ $(basename $(readlink /sbin/init)) != busybox ]]
	then
		# reloading init
		echo "     Reloading init ..."
		[[ -z ${MROOT} ]] && /sbin/init U &> /dev/null
	fi

		if [[ -x /usr/sbin/locale-gen ]] && [[ -z ${MROOT} ]]
		then
			# generating user def locales
			echo "     Generating user defined locales ..."
			/usr/sbin/locale-gen
		fi
	}
}

src_prepare()
{
	munpack ${SRCFILE} || die
	cd ${SRCDIR}

	# disable binutils -as-needed
	sed -i 's/^have-as-needed.*/have-as-needed = no/' ${SRCDIR}/config.make.in || die

	# fix permissions on some of the scripts
	chmod u+x ${SRCDIR}/scripts/*.sh || die

	install -d ${SRCDIR}/build || die
	cd ${SRCDIR}/build

	if [ ! -f /etc/ld.so.conf ]
	then
		touch /etc/ld.so.conf || die
	fi

	# disable some eglibc defaults:
	# no ipv6 support
#	sed -i "s:^\(OPTION_EGLIBC_ADVANCED_INET6 =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
	# only some default charsets
#	sed -i "s:^\(OPTION_EGLIBC_CHARSETS =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
	# disable support for locales
#	sed -i "s:^\(OPTION_EGLIBC_CATGETS =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
#	sed -i "s:^\(OPTION_EGLIBC_LOCALES =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
#	sed -i "s:^\(OPTION_EGLIBC_LOCALE_CODE =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
	# disable mail aliases support
#	sed -i "s:^\(OPTION_EGLIBC_DB_ALIASES =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
#	# disable nis support
#	sed -i "s:^\(OPTION_EGLIBC_NIS =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
	# no remote services via rsh
#	sed -i "s:^\(OPTION_EGLIBC_RCMD =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
	# no sunrpc
#	sed -i "s:^\(OPTION_EGLIBC_SUNRPC =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
	# no support for old access of utmp
#	sed -i "s:^\(OPTION_EGLIBC_UTMP =\).*:\1 n:" ${SRCDIR}/option-groups.defaults || die
}

src_compile()
{

	# fixes some build issues;
	# -> configure: error: no acceptable grep could be found
	export ac_cv_path_GREP=/bin/grep

	# support multilib lib64 dir (x86_64 only)
	if [[ ${ARCH} = x86_64 ]]
	then
		# first build a -m32 version
		install -d ${SRCDIR}/build-m32
		cd ${SRCDIR}/build-m32

		CC="gcc -m32" CXX="g++ -m32" \
		../configure \
			--build=${CHOST} \
			--host=i686-pc-linux-gnu \
			--prefix=/usr \
			--mandir=/usr/share/man \
			--infodir=/usr/share/info \
			--disable-profile \
			--enable-add-ons=nptl \
			--with-tls \
			--with-__thread \
			--enable-kernel=${ENABLE_KERNEL} \
			--without-cvs \
			--without-gd \
			--libdir=/usr/lib \
			--libexecdir=/usr/lib/eglibc \
			--with-headers=${ALT_HEADERS} \
			--disable-nls \
			|| die

		make PARALLELMFLAGS="${MAKEOPTS}" || die
	fi

	cd ${SRCDIR}/build

	if [[ ${ARCH} = x86_64 ]]; then
		# make sure the -m64 libs goes really to /lib64
		echo "slibdir=/$(mlibdir)" >> ${SRCDIR}/build/configparms || die
	fi

	# kernel-2.6 with nptl needs this
	../configure \
		--build=${CHOST} \
		--host=${CHOST} \
		--prefix=/usr \
		--mandir=/usr/share/man \
		--infodir=/usr/share/info \
		--disable-profile \
		--enable-add-ons=nptl \
		--with-tls \
		--with-__thread \
		--enable-kernel=2.6.0 \
		--without-cvs \
		--without-gd \
		--libdir=/usr/$(mlibdir) \
		--libexecdir=/usr/$(mlibdir)/eglibc \
		--with-headers=${ALT_HEADERS} \
		|| die

	make PARALLELMFLAGS="${MAKEOPTS}" || die
}

src_install_eglibc()
{
	if [[ ${ARCH} = x86_64 ]]
	then
		# install -m32 libs
		cd ${SRCDIR}/build-m32
		make PARALLELMFLAGS="${MAKEOPTS}" install_root=${BINDIR} install || die
	fi

	cd ${SRCDIR}/build
	make PARALLELMFLAGS="${MAKEOPTS}" install_root=${BINDIR} install || die

	# cleanup
	zapmost ${BINDIR} $(mlibdir) \
		usr/$(mlibdir)/*.so \
		$([[ ${ARCH} = x86_64 ]] && echo 'lib usr/lib/*.so') \
		sbin/ldconfig \
		usr/bin/iconv \
		usr/bin/locale \
		usr/$(mlibdir)/gconv/ISO8859-1.so \
		usr/$(mlibdir)/gconv/UNICODE.so \
		usr/$(mlibdir)/gconv/gconv-modules \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/ISO8859-1.so') \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/UNICODE.so') \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/gconv-modules') \
		|| die

	# base environment
	minstallenv eglibc.envd 00eglibc || die
	if [[ ${ARCH} = x86_64 ]]
	then
		echo "LDPATH=\"/usr/local/$(mlibdir)\"" >> ${BINDIR}/etc/env.d/00eglibc || die
		echo "LDPATH=\"/opt/$(mlibdir)\"" >> ${BINDIR}/etc/env.d/00eglibc || die
	fi

	# move some libs and tools to proper locations
	# will suppress some ldconfig errors too
	mv ${BINDIR}/$(mlibdir)/libmemusage.so ${BINDIR}/usr/$(mlibdir) || die
	mv ${BINDIR}/$(mlibdir)/libpcprofile.so ${BINDIR}/usr/$(mlibdir) || die
	mlink ../usr/$(mlibdir)/libmemusage.so /$(mlibdir)/libmemusage.so || die
	mlink ../usr/$(mlibdir)/libpcprofile.so /$(mlibdir)/libpcprofile.so || die

	# strip all binaries
	find ${BINDIR} | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded || die

	# strip all libraries
	# want to be safe here; --strip-unneeded seems to cause pthread problems
	# strip all but libpthread
	install -d ${BUILDDIR}/thread-backup || die
	mv ${BINDIR}/$(mlibdir)/lib{pthread,thread_db}* ${BUILDDIR}/thread-backup/ || die
	# now strip
	find ${BINDIR} | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded || die
	mv -f ${BUILDDIR}/thread-backup/* ${BINDIR}/$(mlibdir)/ || die
	# remove stale directory
	rm -rf ${BUILDDIR}/thread-backup || die

	# prepare glibc for installation; slackware method
	minstalldir /incoming || die
	mv ${BINDIR}/$(mlibdir)/* ${BINDIR}/incoming || die
	mv ${BINDIR}/incoming ${BINDIR}/$(mlibdir)/incoming || die
	mv ${BINDIR}/$(mlibdir)/incoming/libSegFault.so ${BINDIR}/$(mlibdir) || die
}

src_install_eglibc-dev()
{
	if [[ ${ARCH} = x86_64 ]]
	then
		# install -m32 libs
		cd ${SRCDIR}/build-m32
		make PARALLELMFLAGS="${MAKEOPTS}" install_root=${BINDIR} install || die
	fi

	cd ${SRCDIR}/build
	make PARALLELMFLAGS="${MAKEOPTS}" install_root=${BINDIR} install || die

	# cleanup -> in eglibc
	rm -r ${BINDIR}/$(mlibdir) || die
	rm ${BINDIR}/usr/$(mlibdir)/*.so || die
	rm ${BINDIR}/usr/$(mlibdir)/gconv/ISO8859-1.so || die
	rm ${BINDIR}/usr/$(mlibdir)/gconv/UNICODE.so || die
	rm ${BINDIR}/usr/$(mlibdir)/gconv/gconv-modules || die
	if [[ ${ARCH} = x86_64 ]]
	then
		rm -r ${BINDIR}/lib || die
		rm ${BINDIR}/usr/lib/*.so || die
		rm ${BINDIR}/usr/lib/gconv/ISO8859-1.so || die
		rm ${BINDIR}/usr/lib/gconv/UNICODE.so || die
		rm ${BINDIR}/usr/lib/gconv/gconv-modules || die
	fi
	rm ${BINDIR}/sbin/ldconfig || die
	rm ${BINDIR}/usr/bin/iconv || die
	rm ${BINDIR}/usr/bin/locale || die

# do not generate the locales here, let it the user do with the locale-gen tool
#	make PARALLELMFLAGS="${MAKEOPTS}" install_root=${BINDIR} localedata/install-locales || die

	# install locales list and generate tools
	# to generate this listing see the glibc-2.5/localedata/SUPPORTED file
	minstalletc locale.gen || die
	minstalldir /usr/sbin || die
	minstallexec -s locale-gen /usr/sbin || die

	# nsswitch configuration file
	minstalletc nsswitch.conf || die

	# nscd configuration file
	minstalletc nscd.conf || die

	# we use Berlin as default
	cp --remove-destination ${BINDIR}/usr/share/zoneinfo/Europe/Berlin ${BINDIR}/etc/localtime || die
	[ -f ${BINDIR}/etc/ld.so.conf ] && { rm -f ${BINDIR}/etc/ld.so.conf || die; }
	[ -e ${BINDIR}/etc/ld.so.cache ] && { rm -rf ${BINDIR}/etc/ld.so.cache || die; }

	# strip all binaries
	find ${BINDIR} | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded || die

	# strip all libraries
	find ${BINDIR} | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded || die
}

fix_db_files()
{
	local i
	local DB_ENTRY="${BUILDDIR}/${PKGNAME}"

	for i in .files .symlinks .dirs
	do
		[ ! -f ${DB_ENTRY}/${i} ] && continue
		[[ -z $(< ${DB_ENTRY}/${i}) ]] && continue

		echo "     fixing /$(mlibdir)/incoming from db-entry '${i}' ..."

		# /lib/incoming -> empty line; sed2 removes all empty lines
		#sed -i -e "s:/$(mlibdir)/incoming.*::g" -e '/^$/d' ${DB_ENTRY}/${i}
		# do not simply emtpy the line, but change it the the correct path,
		# so no stale libs are around if the package gets updated!
		sed -i -e "s:/$(mlibdir)/incoming:/$(mlibdir):g" \
			-e "s:/$(mlibdir)/incoming.*::g" -e '/^$/d' ${DB_ENTRY}/${i}
	done
}