# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

inherit eutils multilib libtool gnuconfig

# Now, I have no mirror for GHDL. :S
RESTRICT="nomirror"

# GHDL 0.21 requires GCC 4.0.2 core source.
GCC_PV="4.0.2"

DESCRIPTION="GHDL - a complete VHDL simulator, using GCC technology"
SRC_URI="ftp://gcc.gnu.org/pub/gcc/releases/gcc-${GCC_PV}/gcc-core-${GCC_PV}.tar.bz2
	http://ghdl.free.fr/ghdl-${PV}.tar.bz2"
HOMEPAGE="http://ghdl.free.fr/"

SLOT="0"
KEYWORDS="~x86 ~ppc"
LICENSE="GPL-2"

IUSE="multilib altivec"

S="${WORKDIR}/gcc-${GCC_PV}"
GHDL_BUILD="${WORKDIR}/build"

# According to README of GHDL 0.21, it can build by GNAT v3.15p or GNAT GPL 2005.
# So, it should use LATEST GNAT v3.15p or GNAT GPL 2005 in portage tree.
# But, according to the bug #83877, it depends on GNAT v3.4*.
# So, DEPEND include GNAT v3.4* by default.
# Of cource, GNAT GPL 2005 is maybe O.K.
GNAT_PVR="3.4*"
#GNAT_GPL_PVR="3.4.5.1-r1"
DEPEND=">=dev-lang/gnat-${GNAT_PVR}"
#DEPEND=">=dev-lang/gnat-gpl-${GNAT_GPL_PVR}"

# Any Ada95 compilers are not required for just running GHDL after it was build.
# But, it means that "emerge --depclean" may remove these Ada95 compilers.
# It's not useful for re-compiling from source at every GHDL version bump.
# So, RDEPEND includes DEPEND by default.
# Of cource, empty is maybe O.K.
#RDEPEND=""
RDEPEND="${DEPEND}"

# When compiling GHDL, CFLAGS should be "-O", according to the README. 
# But, generic GCC with "-O2" as CFLAGS may be safe.
#CFLAGS="-O"
CFLAGS="-O2"
# Bah, if emake-ing without "-j1", the build process chokes. :/
MAKEOPTS="-j1"

src_unpack() {
	unpack ${A}

	einfo "Copying GHDL sources into gcc-${GCC_PV}. :)"
	cp -R "${WORKDIR}/${P}/vhdl" "${S}/gcc" \
		|| die "Copying GHDL sources faild. :("

	# This patch completely delete man/info pages. :/
	#einfo "patch for gcc-3.4.3..."
	#patch "${S}/gcc/Makefile.in" \
	#	"${FILESDIR}/gcc-3.4.3.patch" \
	#	|| die "patch for gcc-3.4.3 failed. :("
	# Now, I'm trying to make it with man/info pages.
	# Then, if these are really un-needed, I'll remove it.

	# This patch makes ${ADAC} = gnatgcc,
	# replace sed script for shared libs issuses, IMHO.
	einfo "patch for ${PN}-${PV}..."
	patch "${S}/gcc/vhdl/Makefile.in" \
		"${FILESDIR}/${PN}-${PV}.patch" \
		|| die "patch for ${PN}-${PV} failed. :("


	# Fixup libtool for .la files with portage.
	cd "${S}" ; elibtoolize --portage --shallow

	# For multilib profile arch, reference from SpanKY's ebuilds.
	if (has_multilib_profile || use multilib ) ; then
		for T_LINUX64 in `find "${S}/gcc/config" -name t-linux64` ;
		do
			einfo "sed for ${T_LINUX64} for multilib. :)"
			sed -i \
				-e "s:\(MULTILIB_OSDIRNAMES = \).*:\1../lib64 ../lib32:" \
				"${T_LINUX64}" \
			|| die "sed for ${T_LINUX64} failed. :("
		done
	fi

	cd "${S}" ; ./contrib/gcc_update --touch &> /dev/null
	gnuconfig_update

	# Prepare the build directory
	mkdir -p "${GHDL_BUILD}"
}

src_compile() {
	cd "${GHDL_BUILD}"

	local myconf=""

	# Install directory layout is following generic style.
	# By default, program prefix is set as "${PN}" is.
	# GHDL must enable "vhdl" by --enable-languages option.
	# And, use $(get_libdir) for multilib profiles...
	myconf="${myconf} \
		--prefix=/usr \
		--program-prefix=${PN} \
		--enable-languages=vhdl \
		--libdir=/usr/$(get_libdir)/${PN} \
		--libexecdir=/usr/$(get_libdir)/${PN} \
		--datadir=/usr/share/${PN}"

	# These options are not included in original bugzilla's ebuild.
	# But if these are not included is maybe OK.
	myconf="${myconf} \
		--bindir=/usr/bin \
		--includedir=/usr/include/${PN} \
		--mandir=/usr/share/man \
		--infodir=/usr/share/info \
		$(use_enable altivec)"

	# For multilib profile.
	(has_multilib_profile || use multilib) || \
		myconf="${myconf} --disable-multilib"

	# GHDL does not support cross compiling, ATM.
	# So, CBUILD == CHOST == CTARGET.
	# FIXME:
	#  As you know, CBUILD, CHOST, CTARGET should be able to set by users/system.
	#  But, for now, GHDL does not support cross compiling.
	#  So, when users/system want to cross compile it,
	#  some warnings and/or errors should happen.
	myconf="${myconf} --build=${CHOST} --host=${CHOST} --target=${CHOST}"

	einfo "Configuring GHDL..."
	"${S}/configure" ${myconf} || die "${PN} configure failed. :("

	touch "${S}/gcc/c-gpref.h"

	einfo "Compiling GHDL..."
	S="${S}" \
	emake || die "${PN} build failed. :("
}

src_install() {
	# Remove breakable symlinks in gcc's include directory.
	for x in ${GHDL_BUILD}/gcc/include/* ;
	do
		if [ -L "${x}" ]
		then
			einfo ""
			einfo "${x} is assumed a breakable symlinks. :P"
			einfo ""
			ls "${x}"
			rm -f "${x}"
			continue
		fi
	done

	# Remove generated headers by fixincludes.
	for x in `find ${GHDL_BUILD}/build/gcc/include -name '*.h'`
	do
		if grep -q 'It has been auto-edited by fixincludes form' "${x}"
		then
			einfo "${x} is removed. :P"
			rm -f "${x}"
		fi
	done

	# Install GHDL's stuff,
	einfo "Install GHDL..."
	cd "${GHDL_BUILD}"
	make DESTDIR="${D}" install || die "${PN} install failed. :("

	# Remove un-useful man pages, these are as its name are. :/
	# But, notice, these man pages didn't conflict others, AFAIK.
	if [ -d "${D}/usr/share/man/man1" ] ;
	then
		einfo ""
		einfo "Remove ${D}/usr/share/man/man1,"
		einfo "because of these are as its name are. :/"
		einfo ""
		rm -rf "${D}/usr/share/man/man1"
	fi
	# Prevent overwriting the files might be owned by others.
	# Notice, these man pages conflict others, AFAIK.
	if [ -d "${D}/usr/share/man/man7" ] ;
	then
		einfo ""
		einfo "Remove ${D}/usr/share/man/man7,"
		einfo "because of it might be owned by others."
		einfo ""
		rm -rf "${D}/usr/share/man/man7"
	fi
	# Prevent overwriting the files might be owned by sys-devel/gcc.
	# Notice, these binaries conflict sys-devel/gcc, AFAIK.
	if [ -f "${D}/usr/bin/${CHOST}-gcc-${GCC_PV}" ] ;
	then
		einfo ""
		einfo "Remove ${D}/usr/bin/${CHOST}-gcc-${GCC_PV},"
		einfo "because of it might be ownd by sys-devel/gcc"
		einfo ""
		rm -rf "${D}/usr/bin/${CHOST}-gcc-${GCC_PV}"
	fi
}

reanalyze_libs() {
	local VHDL_ROOT="$1"
	local GHDL_BIN="$2"

	einfo ""
	einfo "Beginning re-analyze..."
	einfo " VHDL_ROOT=\"${VHDL_ROOT}\""
	einfo " GHDL_BIN=\"${GHDL_BIN}\""
	einfo ""

	local STD93SRCS="src/std/textio.v93 \
	src/std/textio_body.v93"

	local STD87SRCS="src/std/textio.v87 \
	src/std/textio_body.v87"

	local IEEE93SRCS="src/ieee/std_logic_1164.v93 \
	src/ieee/std_logic_1164_body.v93 \
	src/ieee/numeric_bit.v93 \
	src/ieee/numeric_bit-body.v93 \
	src/ieee/numeric_std.v93 \
	src/ieee/numeric_std-body.v93 \
	src/vital2000/timing_p.vhdl \
	src/vital2000/timing_b.vhdl \
	src/vital2000/prmtvs_p.vhdl \
	src/vital2000/prmtvs_b.vhdl \
	src/vital2000/memory_p.vhdl \
	src/vital2000/memory_b.vhdl"

	local IEEE87SRCS="src/ieee/std_logic_1164.v87 \
	src/ieee/std_logic_1164_body.v87 \
	src/ieee/numeric_bit.v87 \
	src/ieee/numeric_bit-body.v87 \
	src/ieee/numeric_std.v87 \
	src/ieee/numeric_std-body.v87 \
	src/vital95/vital_timing.vhdl \
	src/vital95/vital_timing_body.vhdl \
	src/vital95/vital_primitives.vhdl \
	src/vital95/vital_primitives_body.vhdl"

	local SYNSRCS="src/synopsys/std_logic_arith.vhdl \
	src/synopsys/std_logic_textio.vhdl \
	src/synopsys/std_logic_unsigned.vhdl \
	src/synopsys/std_logic_signed.vhdl \
	src/synopsys/std_logic_misc.vhdl \
	src/synopsys/std_logic_misc-body.vhdl"

	local MENTORSRCS="src/mentor/std_logic_arith.vhdl \
	src/mentor/std_logic_arith_body.vhdl"

	local FILE=""

	for FILE in ${STD93SRCS};
	do
		einfo "Reanalys ${FILE}..."
		"${GHDL_BIN}" -a --bootstrap --work=std --std=93 --ieee=none \
		--workdir="${VHDL_ROOT}/lib/v93/std" "${VHDL_ROOT}/${FILE}" \
		|| die "reanalyze for ${FILE} failed. :(" ;
	done

	for FILE in ${STD87SRCS};
	do
		einfo "Reanalys ${FILE}..."
		"${GHDL_BIN}" -a --bootstrap --work=std --std=87 --ieee=none \
		--workdir="${VHDL_ROOT}/lib/v87/std" "${VHDL_ROOT}/${FILE}" \
		|| die "reanalyze for ${FILE} failed. :(" ;
	done

	for FILE in ${IEEE93SRCS};
	do
		einfo "Reanalys ${FILE}..."
		"${GHDL_BIN}" -a --bootstrap --work=ieee --ieee=none --std=93 \
		-P"${VHDL_ROOT}/lib/v93/std" \
		--workdir="${VHDL_ROOT}/lib/v93/ieee" "${VHDL_ROOT}/${FILE}" \
		|| die "reanalyze for ${FILE} failed. :(" ;
	done

	for FILE in ${IEEE87SRCS};
	do
		einfo "Reanalys ${FILE}..."
		"${GHDL_BIN}" -a --bootstrap --work=ieee --std=87 --ieee=none --std=87 \
		-P"${VHDL_ROOT}/lib/v87/std" \
		--workdir="${VHDL_ROOT}/lib/v87/ieee" "${VHDL_ROOT}/${FILE}" \
		|| die "reanalyze for ${FILE} failed. :(" ;
	done

	cp "${VHDL_ROOT}/lib/v93/ieee/ieee-obj93.cf" "${VHDL_ROOT}/lib/v93/synopsys"
	for FILE in ${SYNSRCS};
	do
		einfo "Reanalys ${FILE}..."
		"${GHDL_BIN}" -a -v --bootstrap --work=ieee --ieee=none --std=93 \
		-P"${VHDL_ROOT}/lib/v93/std" \
		--workdir="${VHDL_ROOT}/lib/v93/synopsys" "${VHDL_ROOT}/${FILE}" \
		|| die "reanalyze for ${FILE} failed. :(" ;
	done

	cp "${VHDL_ROOT}/lib/v87/ieee/ieee-obj87.cf" "${VHDL_ROOT}/lib/v87/synopsys"
	for FILE in ${SYNSRCS};
	do
		einfo "Reanalys ${FILE}..."
		"${GHDL_BIN}" -a -v --bootstrap --work=ieee --ieee=none --std=87 \
		-P"${VHDL_ROOT}/lib/v87/std" \
		--workdir="${VHDL_ROOT}/lib/v87/synopsys" "${VHDL_ROOT}/${FILE}" \
		|| die "reanalyze for ${FILE} failed. :(" ;
	done

	cp "${VHDL_ROOT}/lib/v93/ieee/ieee-obj93.cf" "${VHDL_ROOT}/lib/v93/mentor"
	for FILE in ${MENTORSRCS};
	do
		einfo "Reanalys ${FILE}..."
		"${GHDL_BIN}" -a -v --bootstrap --work=ieee --ieee=none --std=93 \
		-P"${VHDL_ROOT}/lib/v93/std" \
		--workdir="${VHDL_ROOT}/lib/v93/mentor" "${VHDL_ROOT}/${FILE}" \
		|| die "reanalyze for ${FILE} failed. :(" ;
	done
}

pkg_postinst() {
	# Reanalyze the libraries on real system.
	# FIXME:
	#  As you know, if new files are generated in pkg_postinst(),
	#  These are remained even after its package was unmerged.
	#  So, it needs to remove these files if it was unmerged.
	reanalyze_libs "${ROOT}/usr/$(get_libdir)/${PN}/gcc/${CHOST}/${GCC_PV}/vhdl" "${ROOT}/usr/bin/${PN}"

	# Notify the user what changed.
	einfo ""
	einfo "The compiler has been installed as ${PN}."
	einfo "Its usage can be available by:"
	einfo " $ ${PN} --help && ${PN} --options-help"
	einfo ""
}