# Template build file for 'cross-i686-pc-linux-gnu'
#
_binutils_version=2.25
_gcc_version=4.9.2
_glibc_version=2.21
_linux_version=3.18.5

_triplet=i686-pc-linux-gnu
_archflags="-march=i686 -mtune=generic"
_CROSS_SYSROOT="/usr/${_triplet}"

pkgname=cross-${_triplet}
version=0.17
revision=3
short_desc="GNU Cross toolchain for the ${_triplet} target (binutils/gcc/glibc)"
maintainer="Juan RP <xtraeme@voidlinux.eu>"
homepage="http://www.voidlinux.eu"
license="Public Domain"
distfiles="
 ${GNU_SITE}/binutils/binutils-${_binutils_version}.tar.bz2
 ${GNU_SITE}/gcc/gcc-${_gcc_version}/gcc-${_gcc_version}.tar.bz2
 ${GNU_SITE}/glibc/glibc-${_glibc_version}.tar.xz
 ${KERNEL_SITE}/kernel/v3.x/linux-${_linux_version}.tar.xz"
checksum="
 22defc65cfa3ef2a3395faaea75d6331c6e62ea5dfacfed3e2ec17b08c882923
 2020c98295856aa13fda0f2f3a4794490757fc24bcca918d52cc8b4917b972dd
 aeeb362437965a5d3f40b151094ca79def04a115bd363fdd4a9a0c69482923b8
 e4442436e59c74169e98d38d2e2a434c7b73f8eda0aa8f20e454eaf52270fc90"

nocross=yes
nodebug=yes
lib32disabled=yes
create_wrksrc=yes
hostmakedepends="perl flex"
makedepends="zlib-devel gmp-devel mpfr-devel libmpc-devel"
depends="${pkgname}-libc-${version}_${revision}"
nostrip_files="libgcc.a libgcov.a libgcc_eh.a"

_apply_patch() {
	local pname="$(basename $1)"

	if [ ! -f ".${pname}_done" ]; then
		patch -Np0 -i ${1}
		touch .${pname}_done
	fi
}

_binutils_build() {
	[ -f ${wrksrc}/.binutils_build_done ] && return 0

	cd ${wrksrc}/binutils-${_binutils_version}

	msg_normal "Building cross binutils bootstrap\n"

	[ ! -d ../binutils-build ] && mkdir ../binutils-build
	cd ../binutils-build

	../binutils-${_binutils_version}/configure \
		--prefix=/usr --target=${_triplet} \
		--with-sysroot=${_CROSS_SYSROOT} --disable-nls --disable-shared \
		--disable-multilib --disable-werror

	make configure-host && make ${makejobs}
	make install

	touch ${wrksrc}/.binutils_build_done
}

_gcc_bootstrap() {
	[ -f ${wrksrc}/.gcc_bootstrap_done ] && return 0

	cd ${wrksrc}/gcc-${_gcc_version}

	msg_normal "Building cross gcc bootstrap\n"

	[ ! -d ../gcc-bootstrap ] && mkdir ../gcc-bootstrap
	cd ../gcc-bootstrap

	CFLAGS="-O0 -g0" CXXFLAGS="-O0 -g0" \
		../gcc-${_gcc_version}/configure --prefix=/usr \
		--target=${_triplet} --without-headers \
		--disable-nls --disable-shared --disable-libquadmath \
		--disable-decimal-float --disable-libgomp --disable-libmudflap \
		--disable-libssp --disable-libitm --disable-libatomic \
		--disable-threads --enable-languages=c \
		--disable-sjlj-exceptions --disable-multilib \
		--with-gnu-ld --with-gnu-as ${_fpuflags}

	make ${makejobs}
	make install

	touch ${wrksrc}/.gcc_bootstrap_done
}

_linux_headers() {
	[ -f ${wrksrc}/.linux_build_done ] && return 0

	cd ${wrksrc}
	msg_normal "Building Linux API headers for x86\n"

	cd linux-${_linux_version}

	make ARCH=x86 headers_check
	make ARCH=x86 INSTALL_HDR_PATH=${_CROSS_SYSROOT}/usr headers_install

	touch ${wrksrc}/.linux_build_done
}

_glibc_headers() {
	[ -f ${wrksrc}/.glibc_headers_done ] && return 0

	cd ${wrksrc}
	msg_normal "Building cross glibc headers\n"

	[ ! -d glibc-headers ] && mkdir glibc-headers
	cd glibc-headers

	echo "libc_cv_forced_unwind=yes" > config.cache
	echo "libc_cv_c_cleanup=yes" >> config.cache
	echo "libc_cv_ssp=no" >> config.cache

	export CC="${_triplet}-gcc" LD="${_triplet}-ld" \
		AS="${_triplet}-as" CPP="${_triplet}-cpp"

	../glibc-${_glibc_version}/configure \
		--host=${_triplet} --prefix=/usr \
		--with-headers=${_CROSS_SYSROOT}/usr/include \
		--config-cache --enable-obsolete-rpc \
		--enable-kernel=2.6.27 ${_fpuflags}

	make -k install-headers cross_compiling=yes \
		install_root=${_CROSS_SYSROOT}

	touch ${wrksrc}/.glibc_headers_done
}

_glibc_build() {
	[ -f ${wrksrc}/.glibc_build_done ] && return 0

	cd ${wrksrc}
	msg_normal "Building cross glibc\n"

	[ ! -d glibc-build ] && mkdir glibc-build
	cd glibc-build

	echo "libc_cv_forced_unwind=yes" > config.cache
	echo "libc_cv_c_cleanup=yes" >> config.cache
	echo "libc_cv_ssp=no" >> config.cache

	export CC="${_triplet}-gcc" LD="${_triplet}-ld" \
		AS="${_triplet}-as" CPP="${_triplet}-cpp"
	export CFLAGS="-Os -pipe -Wno-error ${_archflags}"

	../glibc-${_glibc_version}/configure \
		--host=${_triplet} --prefix=/usr \
		--with-headers=${_CROSS_SYSROOT}/usr/include \
		--config-cache --enable-obsolete-rpc \
		--enable-kernel=2.6.27 ${_fpuflags}

	make ${makejobs}
	make install_root=${_CROSS_SYSROOT} install

	touch ${wrksrc}/.glibc_build_done
}

_gcc_build() {
	[ -f ${wrksrc}/.gcc_build_done ] && return 0

	cd ${wrksrc}
	msg_normal "Building cross gcc final\n"

	[ ! -d gcc-build ] && mkdir gcc-build
	cd gcc-build

	unset LD AS CPP
	export CC="gcc" CFLAGS="-Os -pipe"

	# Make this link to target libs.
	if [ ! -f .sed_subst_done ]; then
		sed -e "s, /lib/, ${_CROSS_SYSROOT}/lib/,g;s, /usr/lib/, ${_CROSS_SYSROOT}/usr/lib/,g" \
			-i ${_CROSS_SYSROOT}/lib/libc.so ${_CROSS_SYSROOT}/lib/libpthread.so
		touch .sed_subst_done
	fi

	../gcc-${_gcc_version}/configure \
		--target=${_triplet} --prefix=/usr --libdir=/usr/lib \
		--with-sysroot=${_CROSS_SYSROOT} --enable-languages=c,c++,lto \
		--with-gnu-as --with-gnu-ld --disable-multilib \
		--disable-nls --disable-sjlj-exceptions \
		--enable-threads=posix --enable-long-longx \
		--enable-shared --enable-linker-build-id \
		--enable-gnu-unique-object --enable-lto \
		--disable-libquadmath --disable-libatomic \
		--disable-libssp --disable-libmudflap \
		--disable-libsanitizer --disable-libcilkrts \
		--disable-libitm --disable-libvtv --disable-libstdcxx-pch \
		--enable-libstdcxx-time --with-linker-hash-style=gnu ${_fpuflags}

	make ${makejobs}

	touch ${wrksrc}/.gcc_build_done
}

do_build() {
	# Ensure we use sane environment
	unset CC CXX CPP LD AS AR RANLIB OBJDUMP READELF NM
	unset CFLAGS CXXFLAGS CPPFLAGS LDFLAGS
	export CFLAGS="-Os" CXXFLAGS="-Os"

	for f in include lib libexec bin sbin; do
		if [ ! -d ${_CROSS_SYSROOT}/usr/${f} ]; then
			mkdir -p ${_CROSS_SYSROOT}/usr/${f}
		fi
		if [ ! -h ${_CROSS_SYSROOT}/${f} ]; then
			ln -sfr ${_CROSS_SYSROOT}/usr/${f} ${_CROSS_SYSROOT}/${f}
		fi
	done

	_binutils_build
	_gcc_bootstrap
	_linux_headers
	_glibc_headers
	_glibc_build
	_gcc_build
}

do_install() {
	for f in include lib libexec bin sbin; do
		if [ ! -d ${DESTDIR}/${_CROSS_SYSROOT}/usr/${f} ]; then
			mkdir -p ${DESTDIR}/${_CROSS_SYSROOT}/usr/${f}
		fi
		if [ ! -h ${DESTDIR}/${_CROSS_SYSROOT}/${f} ]; then
			ln -sfr ${DESTDIR}/${_CROSS_SYSROOT}/usr/${f} \
				${DESTDIR}/${_CROSS_SYSROOT}/${f}
		fi
	done

	# install cross binutils
	cd ${wrksrc}/binutils-build
	make DESTDIR=${DESTDIR} install

	# install cross gcc
	cd ${wrksrc}/gcc-build
	make DESTDIR=${DESTDIR} install

	# install linux API headers for x86.
	cd ${wrksrc}/linux-${_linux_version}
	make ARCH=x86 INSTALL_HDR_PATH=${DESTDIR}/${_CROSS_SYSROOT}/usr headers_install

	rm -f $(find ${DESTDIR}/${_CROSS_SYSROOT}/usr/include -name .install -or -name ..install.cmd)
	rm -rf ${DESTDIR}/${_CROSS_SYSROOT}/usr/include/drm

	# install glibc for target
	cd ${wrksrc}/glibc-build
	make install_root=${DESTDIR}/${_CROSS_SYSROOT} install install-headers

	# Remove unnecessary stuff
	rm -f ${DESTDIR}/usr/lib*/libiberty.a
	rm -rf ${DESTDIR}/usr/share
	rm -rf ${DESTDIR}/${_CROSS_SYSROOT}/{etc,var}
	rm -rf ${DESTDIR}/${_CROSS_SYSROOT}/usr/{sbin,share,libexec}
	rm -rf ${DESTDIR}/${_CROSS_SYSROOT}/usr/lib/gconv
	rm -f ${DESTDIR}/${_CROSS_SYSROOT}/libexec

	for f in sprof localedef gencat pldd sotruss tzselect iconv mtrace \
		catchsegv xtrace makedb pcprofiledump locale rpcgen getconf \
		getent ldd; do
		rm -f ${DESTDIR}/${_CROSS_SYSROOT}/usr/bin/${f}
	done
}

cross-i686-pc-linux-gnu-libc_package() {
	short_desc+=" - glibc files"
	noarch=yes
	nostrip=yes
	noverifydeps=yes
	noshlibprovides=yes
	pkg_install() {
		vmove usr/${_triplet}
	}
}