# $Id$

PNAME="clang"
PVER="15.0.7"
PBUILD="r1"

# gcc version which llvm was compiled with
GCC_VER="13.1.0"

PCAT="sys-dev"

DESCRIPTION="C language family frontend for LLVM."
HOMEPAGE="http://llvm.org/"

DEPEND=">= dev-libs/libxml2-2.11
	== sys-dev/gcc-${GCC_VER}
	== sys-libs/compiler-rt-${PVER}
	== sys-libs/llvm-libs-${PVER}"

SDEPEND="== sys-dev/llvm-${PVER}
	>= virtual/pkgconfig
	>= dev-lang/python3-3.11
	>= virtual/sed"

SRCFILE="clang-${PVER}.src.tar.xz"
SRCDIR="${BUILDDIR}/clang-${PVER}.src"

LLVM_SRCFILE="llvm-${PVER}.src.tar.xz"
LLVM_SRCDIR="${BUILDDIR}/llvm-${PVER}.src"

CLANG_EXTRA_SRCFILE="clang-tools-extra-${PVER}.src.tar.xz"
CLANG_EXTRA_SRCDIR="${BUILDDIR}/clang-tools-extra-${PVER}.src"

CMAKE_SRCFILE="cmake-${PVER}.src.tar.xz"
CMAKE_SRCDIR="${BUILDDIR}/cmake-${PVER}.src"

MANPAGES_SRCFILE="llvm-${PVER}-manpages.tar.bz2"
MANPAGES_SRCDIR="${BUILDDIR}/llvm-${PVER}-manpages"

sminclude multilib python3 mtools meson cmake
msetfeature "!check static"

SRC_URI=(
	https://github.com/llvm/llvm-project/releases/download/llvmorg-${PVER}/${SRCFILE}
	https://github.com/llvm/llvm-project/releases/download/llvmorg-${PVER}/${LLVM_SRCFILE}
	https://github.com/llvm/llvm-project/releases/download/llvmorg-${PVER}/${CLANG_EXTRA_SRCFILE}
	https://github.com/llvm/llvm-project/releases/download/llvmorg-${PVER}/${CMAKE_SRCFILE}
	mirror://llvm/${SRCFILE}
	mirror://llvm/${LLVM_SRCFILE}
	mirror://llvm/${CLANG_EXTRA_SRCFILE}
	mirror://llvm/${CMAKE_SRCFILE}
	mirror://llvm/${MANPAGES_SRCFILE}
	mirror://llvm/clang-${PVER}-enable_default_ssp-1.patch
	mirror://llvm/clang-${PVER}-linker-wrapper-tool.patch
	mirror://llvm/clang-${PVER}-structured-bindings-r1-v2.patch
	mirror://llvm/clang-${PVER}-bitfield-value-capture.patch
)

UP2DATE="updatecmd https://github.com/${PNAME}/llvm-project/releases | grep llvmorg- | highesttarball gz"

# pkgs which require a rebuild: mesa

src_prepare()
{
	munpack ${SRCFILE} || die
	SRCDIR="${CLANG_EXTRA_SRCDIR}" munpack ${CLANG_EXTRA_SRCFILE} || die

	# move all sources into the llvm src tree
	all-abis mv ${CLANG_EXTRA_SRCDIR}-$(mabi) ${SRCDIR}-$(mabi)/tools/extra || die

	# apply patches
	# enable ssp by default
	mpatch -Np2 clang-${PVER}-enable_default_ssp-1.patch || die
	# upstream:
	# https://reviews.llvm.org/D145862
	mpatch -lNp2 clang-${PVER}-linker-wrapper-tool.patch || die
	# https://reviews.llvm.org/D122768 (needed for Chromium 113)
	mpatch -Np2 clang-${PVER}-structured-bindings-r1-v2.patch || die
	# https://reviews.llvm.org/D131202 (regression caused by the above)
	mpatch clang-${PVER}-bitfield-value-capture.patch

	# cmake addons and thirdparty modules are expected outside the llvm srcdir without any versions
	oldmunpack ${CMAKE_SRCFILE} || die
	mv -v ${CMAKE_SRCDIR} ${BUILDDIR}/cmake || die

	# some header references are required from llvm to build clang
	oldmunpack ${LLVM_SRCFILE} || die

	# pre-generated man-pages
	oldmunpack ${MANPAGES_SRCFILE} || die

	# attempt to convert script to python 3
	all-abis 2to3 -wn --no-diffs tools/extra/clang-include-fixer/find-all-symbols/tool/run-find-all-symbols.py || die
}

src_compile()
{
	# honor outside tree builds
	cmake_setup_builddir || die

	cmake_configure \
		-G Ninja \
		-DCMAKE_SKIP_RPATH=ON \
		-DLLVM_LINK_LLVM_DYLIB=ON \
		-DCLANG_LINK_CLANG_DYLIB=ON \
		-DLLVM_ENABLE_RTTI=ON \
		-DLLVM_BUILD_TESTS=ON \
		-DLLVM_BUILD_DOCS=OFF \
		-DLLVM_ENABLE_SPHINX=OFF \
		-DLLVM_ENABLE_DOXYGEN=OFF \
		-DSPHINX_WARNINGS_AS_ERRORS=OFF \
		-DCLANG_DEFAULT_PIE_ON_LINUX=ON \
		-DENABLE_LINKER_BUILD_ID=ON \
		-DLLVM_EXTERNAL_LIT=/usr/bin/lit \
		-DLLVM_MAIN_SRC_DIR="${LLVM_SRCDIR}" \
		'$([[ $(mlibdir) != lib ]] && echo "-DLLVM_LIBDIR_SUFFIX=32")' \
		-DLLVM_HOST_TRIPLE=${CHOST} \
		|| die

	all-abis SRCDIR=${BUILDDIR}/build mninja || die
}

src_check()
{
	all-abis SRCDIR=${BUILDDIR}/build mninja check-clang || die
	all-abis SRCDIR=${BUILDDIR}/build mninja check-clang-tools || die
}

src_install()
{
	SRCDIR=${BUILDDIR}/build DESTDIR=${BINDIR} mninja install || die

	# install pre-generated man-pages
	minstallman ${MANPAGES_SRCDIR}/clang/*.1 || die

	# install python bindings (non multilib)
	minstalldir $(mget-python-libdir) || die
	all-abis mcopy -r bindings/python/clang $(mget-python-libdir)/ || die
	mv -v ${BINDIR}/usr/$(mlibdir)/libear ${BINDIR}/$(mget-python-libdir)/ || die
	mv -v ${BINDIR}/usr/$(mlibdir)/libscanbuild ${BINDIR}/$(mget-python-libdir)/ || die
	# compile all python scripts
	${MAGE_PYTHON3_EXEC} -m compileall ${BINDIR} || die
	${MAGE_PYTHON3_EXEC} -O -m compileall ${BINDIR} || die

	# fix libexec
	mv -v ${BINDIR}/usr/libexec/* ${BINDIR}/usr/$(mlibdir)/clang/ || die
	rmdir -v ${BINDIR}/usr/libexec || die
	sed -i "s:libexec:$(mlibdir)/clang:g" \
		${BINDIR}/usr/bin/scan-build \
		${BINDIR}/$(mget-python-libdir)/libscanbuild/analyze.py \
		|| die

	minstalldocs tools/clang/LICENSE.TXT || die
}