# Copyright 1999-2006 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 1.6 2006/05/13 20:17:48 george 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
	einfo ""
	einfo "The compiler has been installed as gnatgcc, and the coverage testing"
	einfo "tool as gnatgcov."
	einfo ""
	einfo "If you are upgrading from GNAT-3.15p or older you will have to"
	einfo "reemerge all Ada packages as GNAT-${MY_PV} has updated to a version of"
	einfo "GCC which is not backwards compatible with 2.8.1."
	einfo ""
}