# Copyright 1999-2022 Gentoo Authors

EAPI="7"

inherit flag-o-matic llvm prefix

# versions:

# XCode-11.3.1                 ld64-530        cctools-949.0.1

# XCode-11.2.1                 ld64-520        cctools-949.0.1

# XCode-11.0                   ld64-512.4      cctools-949.0.1

# XCode-8.2.1                  ld64-274.2      cctools-895         <== binutils-apple-8.2.1-r1  (2019)

# macOS-10.15.6                dyld-750.6                          Causes build failures with Xcode-11 tools

# macOS-10.14.4-10.14.6        dyld-655.1.1                        Causes build failures with Xcode-11 tools

# macOS-10.13.6                dyld-551.4

# macOS-10.12.1-10.12.3        dyld-421.2                          <== binutils-apple-8.2.1-r1,8.1

LD64=ld64-274.2

CCTOOLS_VERSION=895

CCTOOLS=cctools-${CCTOOLS_VERSION}

DYLD=dyld-421.2

DESCRIPTION="Darwin assembler as(1) and static linker ld(1), Xcode Tools ${PV}"

HOMEPAGE="http://www.opensource.apple.com/"

SRC_URI="http://www.opensource.apple.com/tarballs/ld64/${LD64}.tar.gz

	http://www.opensource.apple.com/tarballs/cctools/${CCTOOLS}.tar.gz

	http://www.opensource.apple.com/tarballs/dyld/${DYLD}.tar.gz

	https://dev.gentoo.org/~grobian/distfiles/${PN}-patches-4.3-r1.tar.bz2

	https://dev.gentoo.org/~grobian/distfiles/${PN}-patches-5.1-r2.tar.bz2

	https://dev.gentoo.org/~grobian/distfiles/${PN}-patches-7.3-r2.tar.bz2

	https://dev.gentoo.org/~grobian/distfiles/${PN}-patches-8.2-r1.tar.bz2"

LICENSE="APSL-2"

KEYWORDS="~x64-macos"

IUSE="lto classic test"

RESTRICT="!test? ( test )"

# ld64 can now only be compiled using llvm and libc++ since it massively uses

# C++11 language features. *But additionally* the as driver now defaults to

# calling clang as the assembler on many platforms. This can be disabled using

# -Wa,-Q but since it's default we make llvm a static runtime dependency.

RDEPEND="sys-devel/binutils-config

	lto? ( app-arch/xar )

	sys-devel/llvm:*

	sys-libs/libcxx"

DEPEND="${RDEPEND}

	test? ( >=dev-lang/perl-5.8.8 )"

S=${WORKDIR}

is_cross() { [[ ${CHOST} != ${CTARGET} ]] ; }

llvm_pkg_setup() {

	# eclass version will die if no LLVM can be found which will break prefix

	# bootstrap

	:

}

src_prepare() {

	cd "${S}"/${LD64}/src

	cp "${S}"/ld64-136-compile_stubs.h ld/compile_stubs.h

	cp "${S}"/ld64-274.2-Makefile Makefile

	eapply -p2 "${S}"/ld64-274.1-nolto.patch

	eapply -p2 "${S}"/ld64-236.3-crashreporter.patch

	eapply -p2 "${S}"/ld64-264.3.102-bitcode-case.patch

	eapply -p2 "${S}"/ld64-274.1-unknown-fixup.patch

	eapply -p2 "${S}"/ld64-274.1-notapi.patch

	eapply -p2 "${S}"/ld64-274.2-cfi-info-type.patch

	# workound llvm-3.9.{0,1} issue

	# https://bugs.gentoo.org/show_bug.cgi?id=603580

	# https://groups.google.com/forum/#!topic/llvm-dev/JY6nuKE__sU

	# http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20160829/169553.html

	sed -i -e '/COMPILE_TIME_ASSERT/d' ld/parsers/libunwind/*.hpp || die

	# provide missing headers from libunwind and dyld

	mkdir -p include/{mach,mach-o/arm} || die

	# never present because it's private

	cp ../../${DYLD}/include/mach-o/dyld_priv.h include/mach-o || die

	# use copies from cctools because they're otherwise hidden in some SDK

	cp ../../${CCTOOLS}/include/mach-o/arm/reloc.h include/mach-o/arm || die

	# provide all required CPU_TYPEs on all platforms

	cp ../../${CCTOOLS}/include/mach/machine.h include/mach/machine.h

	# add alias for newer identifiers, because ld64 uses both but cctools

	# header only defines the older

	eapply -p2 "${S}"/ld64-236.3-missing-cputypes.patch

	local VER_STR="\"@(#)PROGRAM:ld  PROJECT:${LD64} (Gentoo ${PN}-${PVR})\\n\""

	echo "char ldVersionString[] = ${VER_STR};" > version.cpp

	eapply -p0 "${S}"/ld64-123.2-debug-backtrace.patch

	cd "${S}"/${CCTOOLS}

	eapply -p1 "${S}"/${PN}-4.5-as.patch

	eapply -p1 "${S}"/${PN}-5.1-as-dir.patch

	eapply -p2 "${S}"/${PN}-5.1-ranlib.patch

	eapply -p1 "${S}"/${PN}-3.1.1-libtool-ranlib.patch

	eapply -p1 "${S}"/${PN}-3.1.1-no-headers.patch

	eapply -p0 "${S}"/${PN}-4.0-no-oss-dir.patch

	eapply -p1 "${S}"/cctools-839-intel-retf.patch

	eapply -p2 "${S}"/${PN}-5.1-extraneous-includes.patch

	eapply -p1 "${S}"/${PN}-5.1-strnlen.patch

	eapply -p1 "${S}"/${PN}-7.3-make-j.patch

	eapply -p1 "${S}"/${PN}-7.3-no-developertools-dir.patch

	eapply -p1 "${S}"/${PN}-8.2.1-llvm-prefix-3.patch

	eapply -p1 "${S}"/${PN}-8.2.1-llvm-shim.patch

	eprefixify libstuff/execute.c

	cp ../${LD64}/src/other/prune_trie.h include/mach-o/ || die

	# do not build profileable libstuff to save compile time

	sed -i -e "/^all:/s, profile , ," libstuff/Makefile

	# cctools version is provided to make via RC_ProjectSourceVersion which

	# generates and compiles it as apple_version[] into libstuff. From

	# there it's picked up by the individual tools. Since

	# RC_ProjectSourceVersion is also used as library version, we can't

	# just append our local version info. So we hack the libstuff Makefile

	# to include our Gentoo version.

	sed -i -e "/cctools-.*(RC_ProjectSourceVersion).*OFILE_DIR/s,Version),Version) (Gentoo ${PN}-${PVR})," \

		libstuff/Makefile

	eapply_user

	# clean up test suite

	cd "${S}"/${LD64}/unit-tests/test-cases

	local c

	# we don't have llvm

	((++c)); rm -rf llvm-integration;

	# we don't have dtrace

	((++c)); rm -rf dtrace-static-probes-coalescing;

	((++c)); rm -rf dtrace-static-probes;

	# a file is missing

	((++c)); rm -rf eh-coalescing-r

	# we don't do universal binaries

	((++c)); rm -rf blank-stubs;

	# looks like a problem with apple's result-filter.pl

	((++c)); rm -rf implicit-common3;

	((++c)); rm -rf order_file-ans;

	# TODO no idea what goes wrong here

	((++c)); rm -rf dwarf-debug-notes;

	einfo "Deleted $c tests that were bound to fail"

	cd "${S}"

	ebegin "cleaning Makefiles from unwanted CFLAGS"

	find . -name "Makefile" -print0 | xargs -0 sed \

		-i \

		-e 's/ -g / /g' \

		-e 's/^G =.*$/G =/' \

		-e 's/^OFLAG =.*$/OFLAG =/' \

		-e 's/install -c -s/install/g'

	eend $?

}

	ENABLE_LTO=0

	if use lto ; then

		ENABLE_LTO=1

		LLVM_INCDIR=$(get_llvm_prefix)/include

		LLVM_LIBDIR=$(get_llvm_prefix)/lib

		[ -n "${LLVM_INCDIR}" -a -n "${LLVM_LIBDIR}" ] || \

			die "LLVM not found - LTO support can not be enabled"

		# LTO and LLVM support currently both depend only on libLTO being

		# present. So we can enable both.

		CCTOOLS_LTO_CFLAGS="-DLTO_SUPPORT -I${LLVM_INCDIR}"

		CCTOOLS_LLVM_CFLAGS="-DLLVM_SUPPORT -I${LLVM_INCDIR}"

	fi

	export CTARGET=${CTARGET:-${CHOST}}

	LIBPATH=/usr/$(get_libdir)/binutils/${CTARGET}/${PV}

	DATAPATH=/usr/share/binutils-data/${CTARGET}/${PV}

	if is_cross ; then

		BINPATH=/usr/${CHOST}/${CTARGET}/binutils-bin/${PV}

		BINPATH=/usr/${CTARGET}/binutils-bin/${PV}

	# CPPFLAGS only affects ld64, cctools don't use 'em (which currently is

	# what we want)

	append-cppflags -DNDEBUG

	# Create configure.h for ld64 with SUPPORT_ARCH_<arch> defines in it.

	DERIVED_FILE_DIR=${LD64}/src \

		${LD64}/src/create_configure

}

compile_ld64() {

	einfo "building ${LD64}"

	cd "${S}"/${LD64}/src

	emake \

		LTO=${ENABLE_LTO} \

		LTO_INCDIR=${LLVM_INCDIR} \

		LTO_LIBDIR=${LLVM_LIBDIR} \

		TAPI=0 \

		TAPI_LIBDIR="${EPREFIX}"/usr/lib

	use test && emake build_test

compile_cctools() {

	einfo "building ${CCTOOLS}"

	cd "${S}"/${CCTOOLS}

	# Suppress running dsymutil because it will warn about missing debug

	# info which is expected when compiling without -g as we normally do.

	# This might need some more thought if anyone ever wanted to build us

	# for debugging with Apple's tools.

	emake \

		LIB_PRUNETRIE="-L../../${LD64}/src -lprunetrie" \

		EFITOOLS= \

		LTO="${CCTOOLS_LTO_CFLAGS} ${CCTOOLS_LLVM_CFLAGS}" \

		COMMON_SUBDIRS='libstuff ar misc otool' \

		SUBDIRS_32= \

		LEGACY= \

		RC_ProjectSourceVersion=${CCTOOLS_VERSION} \

		RC_CFLAGS="${CFLAGS}" \

		OFLAG="${CCTOOLS_OFLAG}" \

		DSYMUTIL=": disabled: dsymutil"

	cd "${S}"/${CCTOOLS}/as

	emake \

		BUILD_OBSOLETE_ARCH= \

		RC_ProjectSourceVersion=${CCTOOLS_VERSION} \

		RC_CFLAGS="-DASLIBEXECDIR=\"\\\"${EPREFIX}${LIBPATH}/\\\"\" ${CFLAGS}" \

		OFLAG="${CCTOOLS_OFLAG}" \

		DSYMUTIL=": disabled: dsymutil"

}

src_compile() {

	compile_ld64

	compile_cctools

}

install_ld64() {

	exeinto ${BINPATH}

	doexe "${S}"/${LD64}/src/{ld64,rebase,dyldinfo,unwinddump,ObjectDump}

	dosym ld64 ${BINPATH}/ld

	insinto ${DATAPATH}/man/man1

	doins "${S}"/${LD64}/doc/man/man1/{ld,ld64,rebase}.1

}

install_cctools() {

	cd "${S}"/${CCTOOLS}

	emake install_all_but_headers \

		EFITOOLS= \

		COMMON_SUBDIRS='ar misc otool' \

		SUBDIRS_32= \

		DSTROOT="\"${D}\"" \

		BINDIR="\"${EPREFIX}\"${BINPATH}" \

		LOCBINDIR="\"${EPREFIX}\"${BINPATH}" \

		USRBINDIR="\"${EPREFIX}\"${BINPATH}" \

		LOCLIBDIR="\"${EPREFIX}\"${LIBPATH}" \

		MANDIR="\"${EPREFIX}\"${DATAPATH}/man/"

	cd "${S}"/${CCTOOLS}/as

	emake install \

		BUILD_OBSOLETE_ARCH= \

		DSTROOT="\"${D}\"" \

		USRBINDIR="\"${EPREFIX}\"${BINPATH}" \

		LIBDIR="\"${EPREFIX}\"${LIBPATH}" \

		LOCLIBDIR="\"${EPREFIX}\"${LIBPATH}"

	# upstream is starting to replace classic binutils with llvm-integrated

	# ones. In Xcode, nm and size are now symlinks to llvm-{nm,size} while the

	# classic version is preserved as {nm,size}-classic. When asked to do so

	# by use classic we statically link to the classic version.

	#   binutils-bin/<version>/<tool>

	#     -> binutils-bin/<version>/<tool>-classic

	#

	# Otherwise we try to find and use the llvm version of the tool. Since our

	# binutils do not live in the same directory as the llvm installation and

	# llvm tends to move around, we use a shim that tries to find the llvm

	# version of the tool in prefix. It will fall back to the classic tool if

	# it fails.

	#  binutils-bin/<version>/<tool>

	#    -> binutils-bin/<version>/llvm-<tool>

	#    -> $EPREFIX/usr/lib/llvm/<major/bin/llvm-<tool>

	#    -> $EPREFIX/usr/bin/llvm-<tool>

	#    -> binutils-bin/<version>/<tool>-classic

	budir="${D}"/${EPREFIX}/${BINPATH}

	for tool in nm size ; do

		use classic && \

			ln -sfn ${tool}-classic "${budir}/${tool}" || \

			ln -sfn llvm-shim "${budir}/${tool}"

	done

	# Also, otool is now based on llvm-objdump. But a small wrapper installed

	# as llvm-otool remains, providing command line compatibility.

	use classic && \

		ln -sfn otool-classic "${budir}/otool" || \

		ln -sfn llvm-otool "${budir}/otool"

	# And finally, although our cctools don't actually contain dsymutil and

	# objdump, we provide access to the llvm versions of them via the shim to

	# be in line with Xcode.

	for tool in objdump dsymutil ; do

		ln -sfn llvm-shim "${budir}/${tool}"

	cd "${ED}"/${BINPATH}

	insinto ${DATAPATH}/man/man1

	local skips manpage

	# ar brings an up-to-date manpage with it

	skips=( ar )

	for bin in *; do

		for skip in ${skips[@]}; do

			if [[ ${bin} == ${skip} ]]; then

				continue 2;

			fi

		done

		manpage=${S}/${CCTOOLS}/man/${bin}.1

		if [[ -f "${manpage}" ]]; then

			doins "${manpage}"

		fi

	insinto ${DATAPATH}/man/man5

	doins "${S}"/${CCTOOLS}/man/*.5

}

src_test() {

	if ! [[ -x "${EPREFIX}"/usr/bin/clang ]] ; then

		einfo "Test suite only works properly with clang - please install"

		return

	fi

	einfo "Running unit tests"

	cd "${S}"/${LD64}/unit-tests/test-cases

	# provide the new ld as a symlink to clang so that -ccc-install-dir

	# will pick it up

	ln -sfn ../../src/ld64 ld

	# use our arch command because the System's will report i386 even for an

	# x86_64 prefix

	perl ../bin/make-recursive.pl \

		BUILT_PRODUCTS_DIR="${S}"/${LD64}/src \

		ARCH="$(arch)" \

		LD="${S}"/${LD64}/src/ld64 \

		CC="${CC} -ccc-install-dir $PWD" \

		CXX="${CXX} -ccc-install-dir $PWD" \

		OTOOL="${S}"/${CCTOOLS}/otool/otool.NEW \

		| perl ../bin/result-filter.pl

}

src_install() {

	install_ld64

	install_cctools

		VER="${PV}"

	newins env.d ${CHOST}-${PV}

	binutils-config ${CHOST}-${PV}