# Template build file for 'cross-x86_64-linux-musl'
#
_binutils_version=2.28
_gcc_version=6.3.0
_musl_version=1.1.16
_linux_version=4.9.8

_triplet=x86_64-linux-musl
_sysroot="/usr/${_triplet}"

pkgname=cross-${_triplet}
version=0.23
revision=2
short_desc="Cross toolchain for x86_64 with musl"
maintainer="Juan RP <xtraeme@voidlinux.eu>"
homepage="http://www.voidlinux.eu"
license="GPL-3, GPL-2, MIT"
distfiles="
 ${GNU_SITE}/binutils/binutils-${_binutils_version}.tar.bz2
 ${GNU_SITE}/gcc/gcc-${_gcc_version}/gcc-${_gcc_version}.tar.bz2
 ${KERNEL_SITE}/kernel/v4.x/linux-${_linux_version}.tar.xz
 http://www.musl-libc.org/releases/musl-${_musl_version}.tar.gz"
checksum="
 6297433ee120b11b4b0a1c8f3512d7d73501753142ab9e2daa13c5a3edd32a72
 f06ae7f3f790fbf0f018f6d40e844451e6bc3b7bc96e128e63b09825c1f8b29f
 150bb7f2dd4849b5d21b8ccd8d05294a48229e1fcb93a22e7b806a79ec0b0e45
 937185a5e5d721050306cf106507a006c3f1f86d86cd550024ea7be909071011"

lib32disabled=yes
nocross=yes
nopie=yes
nodebug=yes
create_wrksrc=yes
hostmakedepends="perl flex"
makedepends="zlib-devel gmp-devel mpfr-devel libmpc-devel isl15-devel"
nostrip_files="libcaf_single.a libgcc.a libgcov.a libgcc_eh.a"
depends="${pkgname}-libc-${version}_${revision}"
only_for_archs="i686 i686-musl x86_64"

_apply_patch() {
	local args="$1" pname="$(basename $2)"

	if [ ! -f ".${pname}_done" ]; then
		patch -N $args -i $2
		touch .${pname}_done
	fi
}

_binutils_build() {
	local _args

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

	cd ${wrksrc}
	msg_normal "Building cross binutils bootstrap\n"

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

	_args="--prefix=/usr"
	_args+=" --target=${_triplet}"
	_args+=" --with-sysroot=${_sysroot}"
	_args+=" --disable-nls"
	_args+=" --disable-multilib"
	_args+=" --disable-werror"
	_args+=" --disable-shared"
	_args+=" ${_fpuflags}"

	../binutils-${_binutils_version}/configure ${_args}

	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 -p1 ${FILESDIR}/gcc-6.3.0-musl.diff
	_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
	export ac_cv_c_compiler_gnu=yes

	_args="--prefix=/usr"
	_args+=" --target=${_triplet}"
	_args+=" --with-sysroot=${_sysroot}"
	_args+=" --enable-languages=c"
	_args+=" --with-newlib"
	_args+=" --disable-libssp"
	_args+=" --disable-nls"
	_args+=" --disable-libquadmath"
	_args+=" --disable-threads"
	_args+=" --disable-decimal-float"
	_args+=" --disable-shared"
	_args+=" --disable-libmudflap"
	_args+=" --disable-libgomp"
	_args+=" --disable-libatomic"
	_args+=" --disable-symvers"
	_args+=" --disable-libmpx"
	_args+=" libat_cv_have_ifunc=no"
	_args+=" ${_fpuflags}"

	../gcc-${_gcc_version}/configure ${_args}
	find -name Makefile -exec sed -i "{}" -e "s;^CFLAGS.*;& -fPIC -D__WCHAR_TYPE__=int;" \;

	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\n"

	cd linux-${_linux_version}

	for f in ${XBPS_SRCPKGDIR}/kernel-libc-headers/patches/*.patch; do
		_apply_patch -p0 $f
	done

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

	touch ${wrksrc}/.linux_build_done
}

_musl_build() {
	[ -f ${wrksrc}/.musl_build_done ] && return 0

	cd ${wrksrc}/musl-${_musl_version}
	msg_normal "Building cross musl libc\n"

	CC="${_triplet}-gcc" CFLAGS="-Os -pipe ${_archflags}" \
		./configure --prefix=/usr

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

	touch ${wrksrc}/.musl_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

	_args="--prefix=/usr"
	_args+=" --target=${_triplet}"
	_args+=" --with-sysroot=${_sysroot}"
	_args+=" --enable-languages=c,c++,fortran,lto"
	_args+=" --enable-lto"
	_args+=" --enable-libquadmath"
	_args+=" --disable-libsanitizer"
	_args+=" --disable-multilib"
	_args+=" --disable-libmpx"
	_args+=" --disable-libmudflap"
	_args+=" --enable-shared"
	_args+=" --disable-symvers"
	_args+=" libat_cv_have_ifunc=no"
	_args+=" ${_fpuflags}"

	../gcc-${_gcc_version}/configure ${_args}
	find -name Makefile -exec sed -i "{}" -e "s;^CFLAGS.*;& -fPIC -D__WCHAR_TYPE__=int;" \;

	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 -pipe -fPIC" CXXFLAGS="-Os -pipe -fPIC"

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

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

	# install musl libc for target
	cd ${wrksrc}/musl-${_musl_version}
	make DESTDIR=${DESTDIR}/${_sysroot} install

	# Remove useless headers.
	rm -rf ${DESTDIR}/usr/lib/gcc/${_triplet}/*/include-fixed/

	# Make ld-musl-x86_64.so.1 symlink relative to cwd.
	cd ${DESTDIR}/${_sysroot}/usr/lib
	ln -sf libc.so ld-musl-x86_64.so.1

	# Move files to /usr/lib (lib64).
	if [ -d ${DESTDIR}/${_sysroot}/usr/lib64 ]; then
		mv ${DESTDIR}/${_sysroot}/usr/lib64/* ${DESTDIR}/${_sysroot}/usr/lib/
		rmdir ${DESTDIR}/${_sysroot}/usr/lib64
	fi
	# Remove unnecessary stuff
	rm -f ${DESTDIR}/usr/lib*/libiberty.a
	rm -rf ${DESTDIR}/usr/share
	rm -rf ${DESTDIR}/${_sysroot}/{etc,var}
	rm -rf ${DESTDIR}/${_sysroot}/usr/{sbin,share,libexec}
	rm -f ${DESTDIR}/${_sysroot}/libexec
	rm -f ${DESTDIR}/${_sysroot}/lib/*.py
	rm -f ${DESTDIR}/${_sysroot}/{sbin,lib}
}

cross-x86_64-linux-musl-libc_package() {
	short_desc+=" - libc files"
	nostrip=yes
	noverifyrdeps=yes
	noshlibprovides=yes
	pkg_install() {
		vmove ${_sysroot}
	}
}