# Copyright 1999-2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

EAPI="4"

PATCH_VER="1.4"
UCLIBC_VER="1.0"

# Hardened gcc 4 stuff
PIE_VER="0.6.1"
SPECS_VER="0.2.0"
SPECS_GCC_VER="4.4.3"
# arch/libc configurations known to be stable with {PIE,SSP}-by-default
PIE_GLIBC_STABLE="x86 amd64 ppc ppc64 arm ia64"
PIE_UCLIBC_STABLE="x86 arm amd64 ppc ppc64"
SSP_STABLE="amd64 x86 ppc ppc64 arm"
# uclibc need tls and nptl support for SSP support
# uclibc need to be >= 0.9.33
SSP_UCLIBC_STABLE="x86 amd64 ppc ppc64 arm"
#end Hardened stuff

inherit eutils toolchain

# This is here to redeclare is_gcc() in toolchain.eclass
# We don't even want to build gcj, which is a real hog
# on memory constrained hardware. base-gcc doesn't actually
# ship with it atm.
is_gcj() {
	return 1
}

DESCRIPTION="The GNU Compiler Collection"

KEYWORDS="~alpha amd64 arm ~arm64 hppa ~ia64 ~m68k ~mips ppc ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~x86-fbsd"

RDEPEND=""
DEPEND="${RDEPEND}
	elibc_glibc? ( >=sys-libs/glibc-2.8 )
	>=${CATEGORY}/binutils-2.20"

src_prepare() {
	# Since Sabayon's gcc ebuild are split into two parts, we have to
	# build gcc with a different version of gcc, or terrible breakage
	# will occur after sys-devel/base-gcc is installed, but the
	# partner sys-devel/gcc still needs to be built.

	# While it is possible to rebuild Sabayon's split gcc from
	# the same version, we have to disallow this also since
	# we have no way of discerning if a configuration change
	# is significant enough to cause breakage.

	GCC_PROFILE_VER=$(cat ${ROOT}/etc/env.d/gcc/config-$CHOST | awk -F- '{ print $NF }')
	einfo "Checking for valid gcc profile to build ${P}"

	# Construct the Slot of the gcc version in the active profile.
	GCC_PROFILE_SLOT_MAJOR=$(echo ${GCC_PROFILE_VER} | awk -F. '{ print $1 }')
	GCC_PROFILE_SLOT_MINOR=$(echo ${GCC_PROFILE_VER} | awk -F. '{ print $2 }')
	GCC_PROFILE_SLOT="${GCC_PROFILE_SLOT_MAJOR}.${GCC_PROFILE_SLOT_MINOR}"
	einfo "Current gcc profile version Slot is: ${GCC_PROFILE_SLOT}"
	if [[ "${GCC_PROFILE_SLOT}" = "${SLOT}" ]] ; then
		eerror "Error!"
		eerror "The active gcc-profile is for sys-devel/gcc slot ${SLOT}."
		eerror "Sabayon's split sys-devel/gcc package MUST be built"
		eerror "with another slotted version of sys-devel/gcc active."
		ebeep 10
	fi

	if has_version '<sys-libs/glibc-2.12' ; then
		ewarn "Your host glibc is too old; disabling automatic fortify."
		ewarn "Please rebuild gcc after upgrading to >=glibc-2.12 #362315"
		EPATCH_EXCLUDE+=" 10_all_default-fortify-source.patch"
	fi

	# drop the x32 stuff once 4.7 goes stable
	if [[ ${CTARGET} != x86_64* ]] || ! has x32 $(get_all_abis TARGET) ; then
		EPATCH_EXCLUDE+=" 90_all_gcc-4.7-x32.patch"
	fi

	toolchain_src_prepare

	use vanilla && return 0

	#Use -r1 for newer piepatchet that use DRIVER_SELF_SPECS for the hardened specs.
	[[ ${CHOST} == ${CTARGET} ]] && epatch "${FILESDIR}"/gcc-spec-env-r1.patch
}

## Just install libgcc stuff
src_install() {
	cd "${WORKDIR}/build"
	S="${WORKDIR}"/build \
		emake -j1 -C "${CTARGET}/libgcc" DESTDIR="${D}" install-shared || die
	if use multilib; then
		S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/32/libgcc" DESTDIR="${D}" \
			install-shared || die
	fi

	if use mudflap; then
		S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/libmudflap" DESTDIR="${D}" \
			install-toolexeclibLTLIBRARIES || die
		if use multilib; then
			S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/32/libmudflap" DESTDIR="${D}" \
				install-toolexeclibLTLIBRARIES || die
		fi
	fi

	if use openmp; then
		S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/libgomp" DESTDIR="${D}" \
			install-toolexeclibLTLIBRARIES || die
		if use multilib; then
			S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/32/libgomp" DESTDIR="${D}" \
				install-toolexeclibLTLIBRARIES || die
		fi
	fi

	S="${WORKDIR}"/build \
		emake -j1 -C "${CTARGET}/libstdc++-v3/src" DESTDIR="${D}" \
		install-toolexeclibLTLIBRARIES || die
	if use multilib; then
		S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/32/libstdc++-v3/src" DESTDIR="${D}" \
			install-toolexeclibLTLIBRARIES || die
	fi

	S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/libstdc++-v3/po" DESTDIR="${D}" install || die
	S="${WORKDIR}"/build emake -j1 -C "${CTARGET}/libgomp" DESTDIR="${D}" install-info || die

	S="${WORKDIR}"/build emake -j1 DESTDIR="${D}" install-target-libquadmath || die
	if use fortran; then
		S="${WORKDIR}"/build emake -j1 DESTDIR="${D}" install-target-libgfortran || die
	fi
	# TODO: what to do with USE objc++ and objc-gc ?
	if use objc; then
		S="${WORKDIR}"/build emake -j1 DESTDIR="${D}" install-target-libobjc || die
	fi

	# from toolchain.eclass yay
	gcc_movelibs

	dodir /etc/env.d/gcc
	create_gcc_env_entry

	# Setup the gcc_env_entry for hardened gcc 4 with minispecs
	if want_minispecs ; then
		copy_minispecs_gcc_specs
	fi

	# drop any .la, .a
	find "${D}" -name *.a -delete
	find "${D}" -name *.la -delete

	# drop any include
	rm "${D}${LIBPATH}"/include -rf
	# drop specs as well, provided by sys-devel/gcc-${PV}:${SLOT}
	# unfortunately, the spec shit above does create the env.d/
	# file content...
	rm "${D}${LIBPATH}"/{32/,}*.spec{s,} -rf
	rm "${D}${LIBPATH}"/specs -rf

	# Now do the fun stripping stuff
	env RESTRICT="" CHOST=${CTARGET} prepstrip "${D}${LIBPATH}"

	cd "${S}"
	if ! is_crosscompile; then
		has noinfo ${FEATURES} \
			&& rm -r "${D}/${DATAPATH}"/info \
			|| prepinfo "${DATAPATH}"
	fi

	# use gid of 0 because some stupid ports don't have
	# the group 'root' set to gid 0
	chown -R root:0 "${D}"${LIBPATH}
}

## Do nothing!
pkg_preinst() {
	:
}

## Do (almost) nothing!
pkg_postinst() {
	# Sabayon specific bits to always force the latest gcc profile
	local gcc_atom=$(best_version sys-devel/base-gcc)
	local gcc_ver=
	if [ -n "${gcc_atom}" ]; then
		elog "Found latest base-gcc to be: ${gcc_atom}, forcing this profile"
		gcc_ver=$(portageq metadata "${ROOT}" installed "${gcc_atom}" PV)
	else
		eerror "No sys-devel/base-gcc installed"
	fi

	if [ -n "${gcc_ver}" ]; then
		local target="${CTARGET:${CHOST}}-${gcc_ver}"
		local env_target="${ROOT}/etc/env.d/gcc/${target}"
		[[ -e "${env_target}-vanilla" ]] && find_target="${target}-vanilla"

		elog "Setting: ${target} GCC profile"
		gcc-config "${target}"
	else
		eerror "No sys-devel/base-gcc version installed? Cannot set a proper GCC profile"
	fi
}

## Do nothing!
pkg_prerm() {
	:
}

## Do nothing!
pkg_postrm() {
	:
}