# $Id$

PNAME="gcc"
PVER="4.3.4"
PBUILD="r2"

PCATEGORIE="sys-dev"
STATE="unstable"

DESCRIPTION="Modern C/C++ compiler written by the GNU people."
HOMEPAGE="http://www.gnu.org/software/gcc/gcc.html"

# DEPEND="== sys-libs/libstdc++-${PVER}
# 	>= sys-dev/binutils-2.20
# 	>= virtual/glibc
# 	>= dev-libs/gmp-4.2.4
# 	>= dev-libs/mpfr-2.3.2"

# cmp from diff utils is needed for bootstrap, busybox version fails
SDEPEND=">= virtual/kernel-headers
	>= sys-dev/binutils-2.20
	>= virtual/glibc
	>= dev-libs/gmp-4.2.4
	>= dev-libs/mpfr-2.3.2
	>= sys-apps/diffutils-2"

SPLIT_PACKAGES="gcc libstdc++"

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

# languages to build into gcc
MyLanguages=c,c++

sminclude mtools cleanutils libtool

SRC_URI=(
	gnu://${PNAME}/${PNAME}-${PVER}/${SRCFILE}
	mirror://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${PNAME}-4.3.2-no-fixincludes.patch
)

UP2DATE="updatecmd \"http://ftp.gnu.org/gnu/${PNAME}/?C=M;O=A\" | sed -n 's/.*${PNAME}-\(.*\)\//\1/;$ p'"

# gcc don't like strong CFLAGS
export CFLAGS="${CFLAGS//-O?} -O2"
export CXXFLAGS="${CFLAGS}"

# check for crosscompile or export default CHOST
if [[ -z ${CCHOST} ]]
then
	# no crosscompile defined
	export CCHOST=${CHOST}
else
	# use crosscompile host
	export CCHOST=${CCHOST}
fi

split_info_gcc()
{
	DESCRIPTION="Modern C/C++ compiler written by the GNU people."
	DEPEND="== sys-libs/libstdc++-${PVER}
		>= sys-dev/binutils-2.20
		>= virtual/glibc
		>= dev-libs/gmp-4.2.4
		>= dev-libs/mpfr-2.3.2"

	postinstall()
	{
		echo
		echo "Please remember that the flag -mcpu does not exist anymore."	
		echo "It has been replaced with '-mtune'. Please update your /etc/mage.rc."
		echo
	}
}

split_info_libstdc++()
{
	DESCRIPTION="Standard GNU C and C++ libraries."

	# needed to prevent compat issues with gcc-3.4.x and gcc-4.0.x
	DEPEND=">= sys-libs/libstdc++-v3-3.3.3
		>= sys-apps/base-files-0.1"
}

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

	# generic fixes
	mpatch ${PNAME}-4.3.2-no-fixincludes.patch || die

	# suppress installation of libiberty, as we will be
	# using the one from binutils
	sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in || die

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

src_compile()
{
	cd ${SRCDIR}/build

	local myconf

	# you better off when not using distcc to compile
	# your new compiler :) maybe not all are the same
	export SMAGE_USE_DISTCC=false

	# Straight from the GCC install doc:
	# "GCC has code to correctly determine the correct value for target
	# for nearly all native systems. Therefore, we highly recommend you
	# not provide a configure target when configuring a native compiler."
	if [[ ${CHOST} != ${CCHOST} ]]
	then
		myconf+=" --target=${CCHOST}"
	fi

	# gcc >= 4.3 has now configure flags for uri and version - yeah!
	AR=ar \
	../configure \
		--with-bugurl="http://bugs.magellan-linux.de/" \
		--with-pkgversion="Magellan-Linux" \
		--build=${CHOST} \
		--host=${CHOST} \
		--prefix=/usr \
		--mandir=/usr/share/man \
		--infodir=/usr/share/info \
		--libdir=/usr/$(mlibdir) \
		--libexecdir=/usr/$(mlibdir) \
		--enable-shared \
		--enable-threads=posix \
		--enable-__cxa_atexit \
		--enable-clocale=gnu \
		--disable-checking \
		--with-system-zlib \
		--enable-long-long \
		--enable-cstdio=stdio \
		--enable-languages=${MyLanguages} \
		--disable-libstdcxx-pch \
		${myconf} \
		|| die

	# parallel builds seems to break sometimes on x86_64
	local myopts
	[[ ${ARCH} = x86_64 ]] && myopts=-j1

	mmake ${myopts} bootstrap-lean || die
}

src_install_gcc()
{
	cd ${SRCDIR}/build
	minstalldir /$(mlibdir) || die

	# install all targets
	make DESTDIR=${BINDIR} install || die

	# versionize all bins and symlink them
	for bin in $(find ${BINDIR}/usr/bin -type f)
	do
		echo ${bin}
		mv ${bin} ${bin}-${PVER} || die
		ln -snf $(basename ${bin}-${PVER}) ${bin} || die
	done

	mlink ../usr/bin/cpp-${PVER} /$(mlibdir)/cpp || die
	# this one is needed on multilib systems.
	# rpcgen may not find the cpp compiler correctly if not in /lib/cpp
	if [[ $(mlibdir) != lib ]]
	then
		minstalldir /lib || die
		mlink ../usr/bin/cpp-${PVER} /lib/cpp || die
	fi
	mlink gcc-${PVER} /usr/bin/cc || die

	# deletes libstdc++ && libgcc_s
	rm ${BINDIR}/usr/$(mlibdir)/{libgcc_s*.*,libstdc++*.*,libssp*.*} || die
	if [[ $(mlibdir) != lib ]] && [[ -d ${BINDIR}/usr/lib ]]
	then
		rm ${BINDIR}/usr/lib/{libgcc_s*.*,libstdc++*.*,libssp*.*} || die
	fi

	# fix all .la files
	# they may contain invalid libpathes which are not needed
	local la
	for la in $(find ${BINDIR} -name \*.la)
	do
		fix_la_file ${la} || die ${la}
	done
}

src_install_libstdc++()
{
	cd ${SRCDIR}/build
	minstalldir /$(mlibdir) || die

	local target
	for target in libstdc++-v3 libgcc libssp
	do
		make DESTDIR=${BINDIR} install-target-${target} || die
	done

	# cleanup, only keep the libs, everything else get provided by the gcc-package
	zapmost ${BINDIR}/usr/$(mlibdir) libgcc_s*.* libstdc++*.* libssp*.* || die
	# multilib as well
	if [[ $(mlibdir) != lib ]] && [[ -d ${BINDIR}/usr/lib ]]
	then
		zapmost ${BINDIR}/usr/lib libgcc_s*.* libstdc++*.* libssp*.* || die
	fi

	# clean up everything else
	zapmost ${BINDIR} usr/$(mlibdir) $([[ $(mlibdir) != lib ]] && echo "usr/lib") || die

	# fix all .la files
	# they may contain invalid libpathes which are not needed
	local la
	for la in $(find ${BINDIR} -name \*.la)
	do
		fix_la_file ${la} || die ${la}
	done
}