# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/dev-lang/gnat/gnat-3.41.ebuild,v 1.7 2007/02/06 08:09:10 genone Exp $

MY_PV=3.4.1
DESCRIPTION="GNAT Ada Compiler"
SRC_URI="ftp://gcc.gnu.org/pub/gcc/releases/gcc-${MY_PV}/gcc-core-${MY_PV}.tar.bz2
	ftp://gcc.gnu.org/pub/gcc/releases/gcc-${MY_PV}/gcc-ada-${MY_PV}.tar.bz2
	x86? ( http://gd.tuwien.ac.at/languages/ada/gnat/3.15p/gnat-3.15p-i686-pc-redhat71-gnu-bin.tar.gz )
	ppc? ( mirror://gentoo/gnat-3.15p-powerpc-unknown-linux-gnu.tar.bz2 )"
HOMEPAGE="http://www.gnat.com/"

DEPEND="x86? ( >=app-shells/tcsh-6.0 )
	!dev-lang/gnat-gcc
	!dev-lang/gnat-gpl"

SLOT="0"
KEYWORDS="~x86 ~ppc"
LICENSE="GMGPL"
IUSE=""

S="${WORKDIR}/gcc-${MY_PV}"
GNATBUILD="${WORKDIR}/build"
case ${ARCH} in
	x86)	GNATBOOT="${WORKDIR}/boot"
			GNATBOOTINST="${WORKDIR}/gnat-3.15p-i686-pc-linux-gnu-bin"
			;;
	ppc)
			GNATBOOT="${WORKDIR}/gnat-3.15p-powerpc-unknown-linux-gnu"
			;;
esac


CFLAGS="-O -gnatpgn"

src_unpack() {
	unpack ${A}

	# Install the bootstrap compiler
	if [ "${ARCH}" = "x86" ]; then
		cd "${GNATBOOTINST}"
		patch -p1 < ${FILESDIR}/gnat-3.15p-i686-pc-linux-gnu-bin.patch
		echo $'\n'3$'\n'${GNATBOOT}$'\n' | ./doconfig > doconfig.log 2>&1
		./doinstall
	fi

	# Prepare the gcc source directory
	cd "${S}"
	touch gcc/cstamp-h.in
	touch gcc/ada/[es]info.h
	touch gcc/ada/nmake.ad[bs]
	mkdir -p "${GNATBUILD}"
}

src_compile() {
	# Set some paths to our bootstrap compiler.
	local GCC_EXEC_PREFIX="${GNATBOOT}/lib/gcc-lib/i686-pc-linux-gnu/3.2.3"
	local PATH="${GNATBOOT}/bin:${PATH}"
	local LDFLAGS="-L${GCC_EXEC_PREFIX} -L${GNATBOOTINST}"
	local CC="${GNATBOOT}/bin/gcc"

	# Configure gcc
	cd "${GNATBUILD}"
	"${S}"/configure --prefix=/usr \
		--program-prefix=gnat \
		--enable-languages="c,ada" \
		--enable-libada \
		--with-gcc \
		--with-gnu-ld \
		--with-gnu-as \
		--enable-threads=posix \
		--enable-shared \
		--with-system-zlib \
		--disable-nls \
		--libdir=/usr/lib/ada \
		--libexecdir=/usr/libexec/ada \
		--mandir=/usr/share/man \
		--infodir=/usr/share/info \
		|| die "configure failed"

	# Compile helper tools
	cd "${GNATBOOT}"
	cp ${S}/gcc/ada/xtreeprs.adb .
	cp ${S}/gcc/ada/xsinfo.adb .
	cp ${S}/gcc/ada/xeinfo.adb .
	cp ${S}/gcc/ada/xnmake.adb .
	gnatmake xtreeprs && \
		gnatmake xsinfo && \
		gnatmake xeinfo && \
		gnatmake xnmake || die "building helper tools"

	for i in `find ${S}/gcc/ada -name '*.ad[sb]'`; do \
		sed -i -e "s/\"gcc\"/\"gnatgcc\"/g" ${i}; \
	done

	cd "${GNATBUILD}"
	emake bootstrap || die "bootstrap failed"
	cd "${GNATBUILD}"
	make -C gcc gnatlib_and_tools || die "gnatlib_and_tools failed"
}

src_install() {
	# Do not allow symlinks in /usr/lib/gcc/${CHOST}/${MY_PV}/include as
	# this can break the build.
	for x in ${WORKDIR}/build/gcc/include/*
	do
		if [ -L ${x} ]
		then
			rm -f ${x}
		fi
	done

	# Install gnatgcc, tools and native threads library
	cd "${GNATBUILD}"
	#make prefix="${D}/usr" libdir="${D}/usr/lib/ada" install \
	#	|| die "installing"
	make prefix=${D}/usr \
		libdir=${D}/usr/lib/ada \
		libexecdir=${D}/usr/libexec/ada \
		mandir=${D}/usr/share/man \
		infodir=${D}/usr/share/info \
		install || die "died while installing"

	# These are all provided by gcc
	rm -rf ${D}/usr/share/info
	rm -rf ${D}/usr/share/man
	rm -rf ${D}/usr/share/make

	dodir "/usr/lib/ada/gcc/${CHOST}/${MY_PV}/rts-native"

	# Move the native threads library
	cd "${D}/usr/lib/ada/gcc/${CHOST}/${MY_PV}"
	mv adalib adainclude rts-native

	# Make native threads the default
	ln -s rts-native/adalib adalib
	ln -s rts-native/adainclude adainclude
}

pkg_postinst() {
	# Notify the user what changed
	elog
	elog "The compiler has been installed as gnatgcc, and the coverage testing"
	elog "tool as gnatgcov."
	elog
	elog "If you are upgrading from GNAT-3.15p or older you will have to"
	elog "reemerge all Ada packages as GNAT-${MY_PV} has updated to a version of"
	elog "GCC which is not backwards compatible with 2.8.1."
	elog
}