gcc: enable Ada (gnat) for x86_64 and i686

See: #4154
Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>

srcpkgs/gcc/template

@@ -7,7 +7,7 @@ _isl_version=0.19
 
 pkgname=gcc
 version=${_majorver}.0
-revision=4
+revision=5
 short_desc="The GNU C Compiler"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="http://gcc.gnu.org"
@@ -38,10 +38,29 @@ fi
 makedepends="zlib-devel"
 depends="binutils libgcc-devel-${version}_${revision}
  libstdc++-devel-${version}_${revision} libssp-devel-${version}_${revision}"
+checkdepends="dejagnu"
 
 subpackages="libgcc libgomp libgomp-devel libatomic libatomic-devel"
 subpackages+=" libssp libssp-devel"
 
+build_options="gnatboot"
+desc_option_gnatboot="Bootstrap Ada using adacore.com binaries"
+
+case "$XBPS_TARGET_MACHINE" in
+x86_64)
+	_gnat_tarball="gnat-gpl-2017-x86_64-linux-bin.tar.gz"
+	distfiles+=" http://mirrors.cdn.adacore.com/art/591c6d80c7a447af2deed1d7>$_gnat_tarball"
+	checksum+=" b942bcac20dea39748b39f8b624d9619f60a8dee2e8195dbe3829c835b0956e6"
+	build_options_default="gnatboot"
+	;;
+i686)
+	_gnat_tarball="gnat-gpl-2014-x86-linux-bin.tar.gz"
+	distfiles+=" http://mirrors.cdn.adacore.com/art/564b3e9dc8e196b040fbe248>$_gnat_tarball"
+	checksum+=" 3b693510f5d22a240abb3034934c1adbd80ccd6e4f61a4f491cc408fdfd9c042"
+	build_options_default="gnatboot"
+	;;
+esac
+
 if [ -n "$CHROOT_READY" ]; then
 	subpackages+=" gcc-fortran libgfortran-devel libgfortran"
 	if [ -z "$CROSS_BUILD" ]; then
@@ -56,6 +75,10 @@ if [ -n "$CHROOT_READY" ]; then
 fi
 
 subpackages+=" libstdc++-devel libstdc++ libgcc-devel"
+if [ "$build_option_gnatboot" ]; then
+	subpackages+=" gcc-ada libada-devel libada"
+fi
+# TODO: figure whether the host's gcc is able to compile ada and enable the subpackages
 
 case "$XBPS_TARGET_MACHINE" in
 	i686) _triplet="i686-pc-linux-gnu";;
@@ -104,6 +127,21 @@ post_extract() {
 	cp -ar ${XBPS_BUILDDIR}/mpfr-${_mpfr_version}/* ${wrksrc}/mpfr/
 	cp -ar ${XBPS_BUILDDIR}/mpc-${_mpc_version}/* ${wrksrc}/mpc/
 	cp -ar ${XBPS_BUILDDIR}/isl-${_isl_version}/* ${wrksrc}/isl/
+
+	if [ "$build_option_gnatboot" ]; then
+		local f="${XBPS_SRCDISTDIR}/${pkgname}-${version}/${_gnat_tarball}"
+		msg_normal "Extracting ${_gnat_tarball} ...\n"
+		mkdir -p ${wrksrc}/gnat-ins
+		tar -x -f "$f" --strip-components=1 -C ${wrksrc}/gnat-ins
+		cd ${wrksrc}/gnat-ins
+		make ins-all prefix=${wrksrc}/gnat
+		cd ${wrksrc}
+		rm -rf ${wrksrc}/gnat-ins
+
+		# Rename obsolete ld and as
+		find ${wrksrc}/gnat -name ld -exec mv -v {} {}.old \;
+		find ${wrksrc}/gnat -name as -exec mv -v {} {}.old \;
+	fi
 }
 
 pre_configure() {
@@ -141,13 +179,11 @@ do_configure() {
 		export GCC_FOR_TARGET="$CC"
 		export CXX_FOR_TARGET="$CXX"
 
-		_args+=" --disable-multilib"
 		_args+=" --host=$XBPS_CROSS_TRIPLET"
 		_args+=" --with-build-sysroot=${XBPS_CROSS_BASE}"
 		_args+=" --enable-sjlj-exceptions=no"
 		_langs+=",fortran"
-	else
+	elif [ -z "$CHROOT_READY" ]; then
-		if [ -z "$CHROOT_READY" ]; then
 		export LD_LIBRARY_PATH="${XBPS_MASTERDIR}/usr/lib"
 		_args+=" --build=${_triplet}"
 	else
@@ -161,7 +197,6 @@ do_configure() {
 		_args+=" --build=${_triplet}"
 		_args+=" --enable-fast-character"
 	fi
-	fi
 
 	case "$XBPS_TARGET_MACHINE" in
 		aarch64*|*-musl) _args+=" --disable-libsanitizer";;
@@ -182,6 +217,7 @@ do_configure() {
 	# Disable explicit -fno-PIE, gcc will figure this out itself.
 	export CFLAGS="${CFLAGS//-fno-PIE/}"
 	export CXXFLAGS="${CXXFLAGS//-fno-PIE/}"
+	export LDFLAGS="${LDFLAGS//-no-pie/}"
 
 	_args+=" --prefix=/usr"
 	_args+=" --mandir=/usr/share/man"
@@ -208,11 +244,23 @@ do_configure() {
 	_args+=" --with-linker-hash-style=$_hash"
 	_args+=" --disable-libunwind-exceptions"
 	_args+=" --disable-target-libiberty"
-	_args+=" --enable-languages=${_langs}"
 
 	mkdir -p build
 	cd build
-	CONFIG_SHELL=/bin/bash ${wrksrc}/configure ${_args}
+	if [ "$build_option_gnatboot" ]; then
+		_args+=" --enable-languages=${_langs},ada"
+		_args+=" --enable-libada"
+		CONFIG_SHELL=/bin/bash \
+		CC="${wrksrc}/gnat/bin/gcc" \
+		GNATBIND="${wrksrc}/gnat/bin/gnatbind" \
+		GNATMAKE="${wrksrc}/gnat/bin/gnatmake" \
+		PATH="${wrksrc}/gnat/bin:$PATH" \
+			${wrksrc}/configure ${_args}
+	else
+		_args+=" --enable-languages=${_langs}"
+		CONFIG_SHELL=/bin/bash \
+			${wrksrc}/configure ${_args}
+	fi
 
 }
 do_build() {
@@ -220,7 +268,15 @@ do_build() {
 		export LD_LIBRARY_PATH="${XBPS_MASTERDIR}/usr/lib"
 	fi
 	cd build
+	if [ "$build_option_gnatboot" ]; then
+		CC="${wrksrc}/gnat/bin/gcc" \
+		GNATBIND="${wrksrc}/gnat/bin/gnatbind" \
+		GNATMAKE="${wrksrc}/gnat/bin/gnatmake" \
+		PATH="${wrksrc}/gnat/bin:$PATH" \
 		make ${makejobs}
+	else
+		make ${makejobs}
+	fi
 }
 pre_install() {
 	if [ "$CROSS_BUILD" ]; then
@@ -284,6 +340,16 @@ do_install() {
 	esac
 }
 
+gcc-ada_package() {
+	lib32disabled=yes
+	depends="gcc>=${_majorver} libada>=${_majorver}"
+	short_desc+=" - Ada compiler frontend"
+	pkg_install() {
+		for f in gnat{,bind,chop,clean,find,kr,link,ls,make,name,prep,xref}; do
+			vmove usr/bin/${f}
+		done
+	}
+}
 gcc-go_package() {
 	lib32disabled=yes
 	depends="gcc>=${_majorver} libgo-devel>=${_majorver}"
@@ -346,6 +412,20 @@ gcc-objc_package() {
 		vmove usr/lib/gcc/${_triplet}/${_majorver}/cc1obj
 	}
 }
+libada-devel_package() {
+	depends="libada>=${_majorver}"
+	short_desc+=" - Ada library - development files"
+	pkg_install() {
+		vmove usr/lib/gcc/${_triplet}/${_majorver}/adainclude
+		vmove usr/lib/gcc/${_triplet}/${_majorver}/plugin/include/ada
+	}
+}
+libada_package() {
+	short_desc=" - Ada library"
+	pkg_install() {
+		vmove usr/lib/gcc/${_triplet}/${_majorver}/adalib
+	}
+}
 libgfortran-devel_package() {
 	depends="libgfortran>=${_majorver}"
 	short_desc+=" - Fortran library - development files"