# $Id$

PNAME="glibc"
PVER="2.16.0"
PBUILD="r1"

SPLIT_PACKAGES="glibc glibc-dev"

PCAT="sys-libs"

GLIBC_DEPEND=">= sys-apps/base-files-0.1"

# 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-3.4.4
	${GLIBC_DEPEND}"

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

SRCFILE="glibc-${PVER}.tar.xz"
SRCDIR="${BUILDDIR}/glibc-${PVER}"

ENVD_REV="1.2"

sminclude mtools cleanutils alx

SRC_URI=(
	ftp://sources.redhat.com/pub/glibc/releases/${SRCFILE}
	ftp://sources.redhat.com/pub/glibc/snapshots/${SRCFILE}
	gnu://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${SRCFILE}
	mirror://${PNAME}/glibc.envd-${ENVD_REV}
	mirror://${PNAME}/locale.gen-header
	mirror://${PNAME}/locale-gen
	mirror://${PNAME}/${PNAME}-2.15-fix-res_query-assert.patch
	mirror://${PNAME}/${PNAME}-2.15-revert-c5a0802a.patch
)

# sed line: on 2 digits add an zero: 2.7 -> 2.7.0
UP2DATE="updatecmd_gnu ${PNAME/-nptl/} | sed 's/^\([0-9]\.[0-9]\$\)/\1.0/'"

# glibc don't like strong CFLAGS
export CFLAGS="${CFLAGS//-O?} -O2"
# glibc -> nptl thread don't like striping
msetfeature "!strip"
# gcc 3.0 - 3.3 needs this:
export CFLAGS="${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} ${flag}"
done
export CFLAGS="${newflags}"

# than add our defaults for glibc
[[ ${ARCH} = i*86 ]] && export CFLAGS="${CFLAGS} -march=${ARCH}" # only i*86
export CFLAGS="${CFLAGS} -mtune=generic" # all arches
export CXXFLAGS="${CFLAGS}"

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

# kernel support
export ENABLE_KERNEL=2.6.32

split_info_glibc()
{
	DESCRIPTION="GNU libc6 (also called glibc2) C library with NPTL Threads."
	DEPEND="${GLIBC_DEPEND}"
	PROVIDE="virtual/glibc"
}

split_info_glibc-dev()
{
	DESCRIPTION="Development files for sys-libs/glibc-${PVER}."
	DEPEND="== sys-libs/glibc-${PVER}"
}

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

	# fix res_query assertion
	# http://sourceware.org/bugzilla/show_bug.cgi?id=13013
	mpatch ${PNAME}-2.15-fix-res_query-assert.patch || die

	# revert commit c5a0802a - causes various hangs
	# https://bugzilla.redhat.com/show_bug.cgi?id=769421
	# Note: fedora may have actual fix (not submitted upstream yet...)
	# http://pkgs.fedoraproject.org/gitweb/?p=glibc.git;a=blob_plain;f=glibc-rh552960-2.patch
	mpatch ${PNAME}-2.15-revert-c5a0802a.patch || die

	# binutils patch needs reconf
	autoconf --force || 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
}

src_compile()
{
	local myopts

	# generic pathes
	myopts="--prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info"
	# disable profiling
	myopts+=" --disable-profile"
	# enable addons
	myopts+=" --enable-add-ons=nptl,libidn"
	# enable tls
	myopts+=" --with-tls --with-__thread"
	# supported kernel-release
	myopts+=" --enable-kernel=${ENABLE_KERNEL}"
	# disable cvs and gd support
	myopts+=" --without-cvs --without-gd"
	# enable bindnow
	myopts+=" --enable-bind-now"
	# enable obsolete rpc implementation
	myopts+=" --enable-obsolete-rpc"

	# 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" \
		CFLAGS="${CFLAGS//-march=${ARCH}} -march=i686" \
		CXXFLAGS="${CXXFLAGS//-march=${ARCH}} -march=i686" \
		../configure \
			--build=${CHOST} \
			--host=i686-pc-linux-gnu \
			--libdir=/usr/lib \
			--libexecdir=/usr/lib/glibc \
			${myopts} \
			|| 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} \
		--libdir=/usr/$(mlibdir) \
		--libexecdir=/usr/$(mlibdir)/glibc \
		${myopts} \
		|| die

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

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

	cd ${SRCDIR}/build
	make PARALLELMFLAGS="${MAKEOPTS}" install_root=${BINDIR} slibdir=/usr/$(mlibdir) rootsbindir=/usr/sbin install || die

	# cleanup
	zapmost ${BINDIR} usr/$(mlibdir)/*.so \
		usr/$(mlibdir)/*.so.* \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/*.so usr/lib/*.so.*') \
		usr/sbin/ldconfig \
		usr/bin/iconv \
		usr/bin/locale \
		usr/$(mlibdir)/gconv/IBM850.so \
		usr/$(mlibdir)/gconv/ISO8859-1.so \
		usr/$(mlibdir)/gconv/ISO8859-15.so \
		usr/$(mlibdir)/gconv/UNICODE.so \
		usr/$(mlibdir)/gconv/gconv-modules \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/IBM850.so') \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/ISO8859-1.so') \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/ISO8859-15.so') \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/UNICODE.so') \
		$([[ ${ARCH} = x86_64 ]] && echo 'usr/lib/gconv/gconv-modules') \
		|| die

	# nsswitch configuration file
	minstalletc ${SRCDIR}/nss/nsswitch.conf || die

	# base environment
	minstallenv glibc.envd-${ENVD_REV} 00glibc || die
	if [[ ${ARCH} = x86_64 ]]
	then
		MCONFIG="/etc/env.d/00glibc"
		maddconfig "LDPATH=\"/$(mlibdir)\"" || die
		maddconfig "LDPATH=\"/usr/$(mlibdir)\"" || die
		maddconfig "LDPATH=\"/usr/local/$(mlibdir)\"" || die
		maddconfig "LDPATH=\"/opt/$(mlibdir)\"" || die
	fi

	# 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 ${BINDIR}/usr/$(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/* ${BINDIR}/usr/$(mlibdir)/ || die
	# remove stale directory
	rm -rf ${BUILDDIR}/thread-backup || die

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

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

	cd ${SRCDIR}/build
	make PARALLELMFLAGS="${MAKEOPTS}" install_root=${BINDIR} slibdir=/usr/$(mlibdir) rootsbindir=/usr/sbin install || die

	# cleanup -> in glibc
	rm -r ${BINDIR}/usr/$(mlibdir)/*.so || die
	rm ${BINDIR}/usr/$(mlibdir)/*.so.* || die
	rm ${BINDIR}/usr/$(mlibdir)/gconv/IBM850.so || die
	rm ${BINDIR}/usr/$(mlibdir)/gconv/ISO8859-1.so || die
	rm ${BINDIR}/usr/$(mlibdir)/gconv/ISO8859-15.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}/usr/lib/*.so || die
		rm ${BINDIR}/usr/lib/*.so.* || die
		rm ${BINDIR}/usr/lib/gconv/IBM850.so || die
		rm ${BINDIR}/usr/lib/gconv/ISO8859-1.so || die
		rm ${BINDIR}/usr/lib/gconv/ISO8859-15.so || die
		rm ${BINDIR}/usr/lib/gconv/UNICODE.so || die
		rm ${BINDIR}/usr/lib/gconv/gconv-modules || die
	fi
	rm ${BINDIR}/usr/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
	# generate locale.gen file from localedata/SUPPORTED file
	minstalletc locale.gen-header locale.gen || die
	sed \
		-e 's:/: :g' \
		-e 's:\\: :g' \
		-e 's:SUPPORTED-LOCALES=::' \
		-e 's:\ \ $::g' \
		-e '/^#/d' \
		-e 's:^:#:g' \
		${SRCDIR}/localedata/SUPPORTED \
		>> ${BINDIR}/etc/locale.gen || die
	minstalldir /usr/sbin || die
	minstallexec -s locale-gen /usr/sbin || die

	# nscd configuration file
	minstalletc ${SRCDIR}/nscd/nscd.conf || die

	# gai configuration file
	minstalletc ${SRCDIR}/posix/gai.conf || die

	# busybox compat
	local args
	if [[ $(readlink /bin/cp) = */busybox ]]
	then
		args="-f"
	else
		args="--remove-destination"
	fi

	# we use Berlin as default
	cp ${args} ${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
}

preinstall_glibc()
{
	add_conf_prot_mask /etc/env.d /etc/nsswitch.conf
}

postinstall_glibc()
{
	# 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 ${MROOT}/usr/$(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 /usr/$(mlibdir)/incoming ] && [[ -z ${MROOT} ]]
	then
		# first create copies of the incoming libraries:
		cd /usr/$(mlibdir)/incoming
		for file in $(find /usr/$(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 /usr/$(mlibdir)/*.incoming 2> /dev/null

		# finally, rename them and clean up:
		cd /usr/$(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 ${MROOT}/usr/$(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 ${MROOT}/usr/$(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 ${MROOT}/usr/$(mlibdir)/"${my_dest}" ] && \
					rm ${MROOT}/usr/$(mlibdir)/"${my_dest}"

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

	# now, get rid of the temporary directory:
	rm -rf ${MROOT}/usr/$(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 ${MROOT}/usr/$(mlibdir)/libpthread.so.0)"

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

		#rm -f /lib/${OLD_PTHREAD}

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

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

postinstall_glibc-dev()
{
	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

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