# Template build file for 'cross-i686-pc-linux-gnu'
#
_binutils_version=2.25.1
_gcc_version=4.9.3
_glibc_version=2.22
_linux_version=3.18.25

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

pkgname=cross-${_triplet}
version=0.21
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="GPL-3, GPL-2, LGPL-2.1"
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="b5b14added7d78a8d1ca70b5cb75fef57ce2197264f4f5835326b0df22ac9f22
 2332b2a5a321b57508b9031354a8503af6fdfb868b8c1748d33028d100a8b67e
 eb731406903befef1d8f878a46be75ef862b9056ab0cde1626d08a7a05328948
 c649874e2856101df7cefe5fdad313ebb2282a939fc1e95cf02222327745ff92"

only_for_archs="armv6l armv7l x86_64"
nocross=yes
nopie=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 args="$1" pname="$(basename $2)"

	if [ ! -f ".${pname}_done" ]; then
		patch -N $args -i $2
		touch .${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=${_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}
	_apply_patch -p0 ${FILESDIR}/libcpp-source_date_epoch.patch
	_apply_patch -p0 ${FILESDIR}/gcc-spec-env-r1.patch

	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=${_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=${_sysroot}/usr/include \
		--config-cache --enable-obsolete-rpc \
		--enable-kernel=2.6.27 ${_fpuflags}

	make -k install-headers cross_compiling=yes \
		install_root=${_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=${_sysroot}/usr/include \
		--config-cache --enable-obsolete-rpc \
		--enable-kernel=2.6.27 ${_fpuflags}

	make ${makejobs}
	make install_root=${_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/, ${_sysroot}/lib/,g;s, /usr/lib/, ${_sysroot}/usr/lib/,g" \
			-i ${_sysroot}/lib/libc.so ${_sysroot}/lib/libpthread.so
		touch .sed_subst_done
	fi

	../gcc-${_gcc_version}/configure \
		--target=${_triplet} --prefix=/usr --libdir=/usr/lib \
		--with-sysroot=${_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 ${_sysroot}/usr/${f} ]; then
			mkdir -p ${_sysroot}/usr/${f}
		fi
		if [ ! -h ${_sysroot}/${f} ]; then
			ln -sfr ${_sysroot}/usr/${f} ${_sysroot}/${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 ${DESTDIR}/${_sysroot}/usr/${f} ]; then
			mkdir -p ${DESTDIR}/${_sysroot}/usr/${f}
		fi
		if [ ! -h ${DESTDIR}/${_sysroot}/${f} ]; then
			ln -sfr ${DESTDIR}/${_sysroot}/usr/${f} \
				${DESTDIR}/${_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=${DESTDIR}/${_sysroot}/usr headers_install

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

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

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

cross-i686-pc-linux-gnu-libc_package() {
	short_desc+=" - glibc files"
	nostrip=yes
	noverifyrdeps=yes
	noshlibprovides=yes
	pkg_install() {
		vmove ${_sysroot}
	}
}