# Template build file for 'cross-i686-pc-linux-gnu'
#
_binutils_version=2.28
_gcc_version=6.3.0
_glibc_version=2.25
_linux_version=4.9.8

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

pkgname=cross-${_triplet}
version=0.23
revision=2
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
 ${KERNEL_SITE}/kernel/v4.x/linux-${_linux_version}.tar.xz"
checksum="
 6297433ee120b11b4b0a1c8f3512d7d73501753142ab9e2daa13c5a3edd32a72
 f06ae7f3f790fbf0f018f6d40e844451e6bc3b7bc96e128e63b09825c1f8b29f
 067bd9bb3390e79aa45911537d13c3721f1d9d3769931a30c2681bfee66f23a0
 150bb7f2dd4849b5d21b8ccd8d05294a48229e1fcb93a22e7b806a79ec0b0e45"

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 isl15-devel"
depends="${pkgname}-libc-${version}_${revision}"
nostrip_files="libcaf_single.a 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() {
	local _args
	[ -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}/fix-cxxflags-passing.patch

	msg_normal "Building cross gcc bootstrap\n"

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

	# Fix https://build.voidlinux.eu/builders/x86_64_builder/builds/24895/steps/shell_3/logs/stdio
	export gcc_cv_libc_provides_ssp=yes
	_args="--prefix=/usr"
	_args+=" --target=${_triplet}"
	_args+=" --without-headers"
	_args+=" --disable-nls"
	_args+=" --disable-shared"
	_args+=" --disable-libquadmath"
	_args+=" --disable-decimal-float"
	_args+=" --disable-libgomp"
	_args+=" --disable-libmpx"
	_args+=" --disable-libmudflap"
	_args+=" --disable-libssp"
	_args+=" --disable-libitm"
	_args+=" --disable-libatomic"
	_args+=" --disable-threads"
	_args+=" --enable-languages=c"
	_args+=" --disable-sjlj-exceptions"
	_args+=" --disable-multilib"
	_args+=" --with-gnu-ld"
	_args+=" --with-gnu-as"
	_args+=" ${_fpuflags}"

	CFLAGS="-O0 -g0" CXXFLAGS="-O0 -g0" \
		../gcc-${_gcc_version}/configure ${_args}

	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() {
	local _args
	[ -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"

	_args="--target=${_triplet}"
	_args+=" --prefix=/usr"
	_args+=" --with-headers=${_sysroot}/usr/include"
	_args+=" --config-cache"
	_args+=" --enable-obsolete-rpc"
	_args+=" --enable-kernel=2.6.27"
	_args+=" ${_fpuflags}"

	../glibc-${_glibc_version}/configure ${_args}

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

	touch ${wrksrc}/.glibc_headers_done
}

_glibc_build() {
	local _args
	[ -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="-O2 -pipe -Wno-error ${_archflags}"
	_args="--host=${_triplet}"
	_args+=" --prefix=/usr"
	_args+=" --with-headers=${_sysroot}/usr/include"
	_args+=" --config-cache"
	_args+=" --enable-obsolete-rpc"
	_args+=" --enable-kernel=2.6.27"
	_args+=" ${_fpuflags}"

	../glibc-${_glibc_version}/configure ${_args}

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

	touch ${wrksrc}/.glibc_build_done
}

_gcc_build() {
	local _args

	[ -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

	# 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 ${_sysroot}/lib/libpthread.so
		touch .sed_subst_done
	fi
	_args="--target=${_triplet}"
	_args+=" --target=${_triplet}"
	_args+=" --prefix=/usr"
	_args+=" --libdir=/usr/lib"
	_args+=" --with-sysroot=${_sysroot}"
	_args+=" --enable-languages=c,c++,fortran,lto"
	_args+=" --with-gnu-as"
	_args+=" --with-gnu-ld"
	_args+=" --disable-multilib"
	_args+=" --disable-nls"
	_args+=" --disable-sjlj-exceptions"
	_args+=" --enable-threads=posix"
	_args+=" --enable-long-longx"
	_args+=" --enable-shared"
	_args+=" --enable-linker-build-id"
	_args+=" --enable-gnu-unique-object"
	_args+=" --enable-lto"
	_args+=" --enable-gnu-indirect-function"
	_args+=" --enable-libquadmath"
	_args+=" --disable-libatomic"
	_args+=" --disable-libssp"
	_args+=" --disable-libmpx"
	_args+=" --disable-libmudflap"
	_args+=" --disable-libsanitizer"
	_args+=" --disable-libcilkrts"
	_args+=" --disable-libitm"
	_args+=" --disable-libvtv"
	_args+=" --disable-libstdcxx-pch"
	_args+=" --enable-libstdcxx-time"
	_args+=" --with-linker-hash-style=gnu"
	_args+=" ${_fpuflags}"

	CC="gcc" CFLAGS="-O2 -pipe" \
		../gcc-${_gcc_version}/configure ${_args}

	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}
	}
}