# $Id$

PNAME="glibc"
PVER="2.29"
PBUILD="r12"

PCAT="sys-libs"

DESCRIPTION="GNU libc6 (also called glibc2) C library with NPTL Threads."
HOMEPAGE="http://www.gnu.org/software/libc/libc.html"

DEPEND=">= sys-apps/base-files-0.7
	>= sys-libs/tzdata-2018"

# we force headers to one specific version
SDEPEND="== sys-kernel/linux-libc-headers-5.0.11"
PROVIDE="virtual/glibc"

# 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

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}-2.17-syscalld-infinite-loop.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
# keep static libs to honor -static-pie or nptl/pthreads segfault may occur
msetfeature "!strip static"

# 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=3.2.0

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

	# fix a test case that fails when built using gcc-5.x
	sed -i '/tst-audit2-ENV/i CFLAGS-tst-audit2.c += -fno-builtin' elf/Makefile || die

	# fixes an infinite loop while syscall.d creation
	# see: http://sourceware.org/bugzilla/show_bug.cgi?id=15711
	mpatch ${PNAME}-2.17-syscalld-infinite-loop.patch || die
	# use 1.0 second instead of 0.5 (required by arch i686 builds on 64bit machines)
	sed -i 's:0.5 seconds ago:1.0 seconds ago:' ${SRCDIR}/Makerules || die

	# scripts/test-installation.pl sometime fails
	#
	#  CC="gcc" /usr/bin/perl scripts/test-installation.pl
	#  /usr/src/glibc-2.16.0.bld/
	#  Unmatched ( in regex; marked by <-- HERE in m/$( <-- HERE if $(abi-32-ld-soname),$(abi-32-ld-soname),ld/ at scripts/test-installation.pl line 172, <LDD>
	#  line 1
	sed -i 's:CC="$(CC)" $(PERL) scripts/test-installation.pl $(common-objpfx)::' Makefile || 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"
	myopts+=" --with-headers=/usr/include"
	# bugurl
	myopts+=" --with-bugurl=http://bugs.magellan-linux.de/"
	# disable profiling
	myopts+=" --disable-profile"
	# enable addons
	myopts+=" --enable-add-ons"
	# 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 lock elision
	myopts+=" --enable-lock-elision"
	# disable -werror
	myopts+=" --disable-werror"
	# enable multi-arch
	myopts+=" --enable-multi-arch"
	# enable stackguard randomization
	myopts+=" --enable-stackguard-randomization"
	# enable stack protector
	myopts+=" --enable-stack-protector=strong"
	# enable static pie
	myopts+=" --enable-static-pie"
	# enable intel cet + branch tracking (IBT) and shadow stack (SHSTK)
	myopts+=" --enable-cet"

	# fortify_source not supported
	export CPPFLAGS=${CPPFLAGS/-D_FORTIFY_SOURCE=2/}

	# 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

		# honor /usr move
		echo "rootsbindir=/usr/sbin" >> ${SRCDIR}/build-m32/configparms || die
		# make sure the -m32 libs goes really to /usr/lib
		echo "slibdir=/usr/lib" >> ${SRCDIR}/build-m32/configparms || die
		echo "rtlddir=/usr/lib" >> ${SRCDIR}/build-m32/configparms || die

		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

	# honor /usr move
	echo "rootsbindir=/usr/sbin" >> ${SRCDIR}/build/configparms || die
	# make sure the -m64 libs goes really to /lib64
	echo "slibdir=/usr/$(mlibdir)" >> ${SRCDIR}/build/configparms || die
	echo "rtlddir=/usr/$(mlibdir)" >> ${SRCDIR}/build/configparms || die

	../configure \
		--build=${CHOST} \
		--host=${CHOST} \
		--libdir=/usr/$(mlibdir) \
		--libexecdir=/usr/$(mlibdir)/glibc \
		${myopts} \
		|| die

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

src_install()
{
	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

# 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

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

	# nscd configuration file
	minstalletc ${SRCDIR}/nscd/nscd.conf || die
	# systemd services, but do not include systemd.sminc to have a hard depend on systemd
	minstalldir /usr/lib/systemd/system || die
	minstallfile ${SRCDIR}/nscd/nscd.service /usr/lib/systemd/system || die
	minstalldir /etc/tmpfiles.d || die
	minstallfile ${SRCDIR}/nscd/nscd.tmpfiles /etc/tmpfiles.d/nscd.conf || die

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

	# now in tzdata
	## we use Berlin as default
	## busybox compat
	#local args
	#if need_busybox_support /bin/cp
	#then
	#	args="-f"
	#else
	#	args="--remove-destination"
	#fi
	#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; }

	# 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} ! -type d | xargs --no-run-if-empty file | grep -v "pie executable" | grep "executable" | grep ELF | cut -f 1 -d : | xargs --no-run-if-empty strip --strip-unneeded || die

	# strip all libraries
	# want to be safe here; --strip-unneeded seems to cause pthread problems
	# strip all but libpthread, libc and ld
	install -d ${BUILDDIR}/thread-backup/$(mlibdir) || die
	mv ${BINDIR}/usr/$(mlibdir)/lib{pthread,thread_db,c-}* ${BUILDDIR}/thread-backup/$(mlibdir)/ || die
	mv ${BINDIR}/usr/$(mlibdir)/ld-* ${BUILDDIR}/thread-backup/$(mlibdir)/ || die
	if [[ ${ARCH} = x86_64 ]]
	then
		install -d ${BUILDDIR}/thread-backup/lib || die
		mv ${BINDIR}/usr/lib/lib{pthread,thread_db,c-}* ${BUILDDIR}/thread-backup/lib/ || die
		mv ${BINDIR}/usr/lib/ld-* ${BUILDDIR}/thread-backup/lib/ || die
	fi

	# now strip but only debuging symbols
	find ${BINDIR} ! -type d | xargs --no-run-if-empty file | grep "[shared object|pie executable]" | grep ELF | cut -f 1 -d : | xargs --no-run-if-empty strip --strip-debug || die
	find ${BINDIR} ! -type d | xargs --no-run-if-empty file | grep "ar archive" | cut -f 1 -d : | xargs --no-run-if-empty strip --strip-debug || die
	mv -f ${BUILDDIR}/thread-backup/$(mlibdir)/* ${BINDIR}/usr/$(mlibdir)/ || die
	if [[ ${ARCH} = x86_64 ]]
	then
		mv -f ${BUILDDIR}/thread-backup/lib/* ${BINDIR}/usr/lib/ || die
	fi
	# 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
}

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

		# /usr/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:/usr/$(mlibdir)/incoming:/usr/$(mlibdir):g" \
			-e "s:/usr/$(mlibdir)/incoming.*::g" \
			-e '/^$/d' ${DB_ENTRY}/${i}
	done
}

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 ${MROOT}/usr/$(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 /usr/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:
		/usr/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)
			/usr/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

	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 ! need_busybox_support /sbin/telinit
	then
		# reloading init
		echo "     Reloading init ..."
		[[ -z ${MROOT} ]] && /sbin/telinit U &> /dev/null
	fi

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

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