--- /dev/null
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6,7,8} )
+inherit cmake-utils llvm llvm.org multilib-minimal multiprocessing \
+ pax-utils python-single-r1 toolchain-funcs
+
+DESCRIPTION="C language family frontend for LLVM"
+HOMEPAGE="https://llvm.org/"
+LLVM_COMPONENTS=( clang clang-tools-extra )
+LLVM_TEST_COMPONENTS=(
+ llvm/lib/Testing/Support
+ llvm/utils/{lit,llvm-lit,unittest}
+)
+llvm.org_set_globals
+# We need extra level of indirection for CLANG_RESOURCE_DIR
+S=${WORKDIR}/x/y/clang
+
+# Keep in sync with sys-devel/llvm
+ALL_LLVM_EXPERIMENTAL_TARGETS=( ARC AVR )
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM BPF Hexagon Lanai Mips MSP430
+ NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore
+ "${ALL_LLVM_EXPERIMENTAL_TARGETS[@]}" )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/?}
+
+# MSVCSetupApi.h: MIT
+# sorttable.js: MIT
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA MIT"
+SLOT="$(ver_cut 1)"
+KEYWORDS=""
+IUSE="debug default-compiler-rt default-libcxx doc +static-analyzer
+ test xml kernel_FreeBSD ${ALL_LLVM_TARGETS[*]}"
+REQUIRED_USE="${PYTHON_REQUIRED_USE}
+ || ( ${ALL_LLVM_TARGETS[*]} )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+ ~sys-devel/llvm-${PV}:${SLOT}=[debug=,${LLVM_TARGET_USEDEPS// /,},${MULTILIB_USEDEP}]
+ static-analyzer? ( dev-lang/perl:* )
+ xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+ ${PYTHON_DEPS}"
+DEPEND="${RDEPEND}"
+BDEPEND="
+ doc? ( dev-python/sphinx )
+ xml? ( virtual/pkgconfig )
+ ${PYTHON_DEPS}"
+RDEPEND="${RDEPEND}
+ !<sys-devel/llvm-4.0.0_rc:0
+ !sys-devel/clang:0"
+PDEPEND="
+ sys-devel/clang-common
+ ~sys-devel/clang-runtime-${PV}
+ default-compiler-rt? ( =sys-libs/compiler-rt-${PV%_*}* )
+ default-libcxx? ( >=sys-libs/libcxx-${PV} )"
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+# Multilib notes:
+# 1. ABI_* flags control ABIs libclang* is built for only.
+# 2. clang is always capable of compiling code for all ABIs for enabled
+# target. However, you will need appropriate crt* files (installed
+# e.g. by sys-devel/gcc and sys-libs/glibc).
+# 3. ${CHOST}-clang wrappers are always installed for all ABIs included
+# in the current profile (i.e. alike supported by sys-devel/gcc).
+#
+# Therefore: use sys-devel/clang[${MULTILIB_USEDEP}] only if you need
+# multilib clang* libraries (not runtime, not wrappers).
+
+pkg_setup() {
+ LLVM_MAX_SLOT=${SLOT} llvm_pkg_setup
+ python-single-r1_pkg_setup
+}
+
+src_unpack() {
+ # create extra parent dir for CLANG_RESOURCE_DIR
+ mkdir -p x/y || die
+ cd x/y || die
+ llvm.org_src_unpack
+ mv clang-tools-extra clang/tools/extra || die
+}
+
+check_distribution_components() {
+ if [[ ${CMAKE_MAKEFILE_GENERATOR} == ninja ]]; then
+ local all_targets=() my_targets=() l
+ cd "${BUILD_DIR}" || die
+
+ while read -r l; do
+ if [[ ${l} == install-*-stripped:* ]]; then
+ l=${l#install-}
+ l=${l%%-stripped*}
+
+ case ${l} in
+ # meta-targets
+ clang-libraries|distribution)
+ continue
+ ;;
+ # tools
+ clang|clangd|clang-*)
+ ;;
+ # static libraries
+ clang*|findAllSymbols)
+ continue
+ ;;
+ esac
+
+ all_targets+=( "${l}" )
+ fi
+ done < <(ninja -t targets all)
+
+ while read -r l; do
+ my_targets+=( "${l}" )
+ done < <(get_distribution_components $"\n")
+
+ local add=() remove=()
+ for l in "${all_targets[@]}"; do
+ if ! has "${l}" "${my_targets[@]}"; then
+ add+=( "${l}" )
+ fi
+ done
+ for l in "${my_targets[@]}"; do
+ if ! has "${l}" "${all_targets[@]}"; then
+ remove+=( "${l}" )
+ fi
+ done
+
+ if [[ ${#add[@]} -gt 0 || ${#remove[@]} -gt 0 ]]; then
+ eqawarn "get_distribution_components() is outdated!"
+ eqawarn " Add: ${add[*]}"
+ eqawarn "Remove: ${remove[*]}"
+ fi
+ cd - >/dev/null || die
+ fi
+}
+
+get_distribution_components() {
+ local sep=${1-;}
+
+ local out=(
+ # common stuff
+ clang-cmake-exports
+ clang-headers
+ clang-resource-headers
+ libclang-headers
+
+ # libs
+ clang-cpp
+ libclang
+ )
+
+ if multilib_is_native_abi; then
+ out+=(
+ # common stuff
+ bash-autocomplete
+ libclang-python-bindings
+
+ # tools
+ c-index-test
+ clang
+ clang-format
+ clang-import-test
+ clang-offload-bundler
+ clang-offload-wrapper
+ clang-refactor
+ clang-rename
+ clang-scan-deps
+ diagtool
+ hmaptool
+
+ # extra tools
+ clang-apply-replacements
+ clang-change-namespace
+ clang-doc
+ clang-include-fixer
+ clang-move
+ clang-query
+ clang-reorder-fields
+ clang-tidy
+ clangd
+ find-all-symbols
+ modularize
+ pp-trace
+ )
+
+ use doc && out+=(
+ docs-clang-html
+ docs-clang-man
+ docs-clang-tools-html
+ docs-clang-tools-man
+ )
+
+ use static-analyzer && out+=(
+ clang-check
+ clang-extdef-mapping
+ scan-build
+ scan-view
+ )
+ fi
+
+ printf "%s${sep}" "${out[@]}"
+}
+
+multilib_src_configure() {
+ local llvm_version=$(llvm-config --version) || die
+ local clang_version=$(ver_cut 1-3 "${llvm_version}")
+
+ local mycmakeargs=(
+ -DLLVM_CMAKE_PATH="${EPREFIX}/usr/lib/llvm/${SLOT}/$(get_libdir)/cmake/llvm"
+ -DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${SLOT}"
+ -DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/llvm/${SLOT}/share/man"
+ # relative to bindir
+ -DCLANG_RESOURCE_DIR="../../../../lib/clang/${clang_version}"
+
+ -DBUILD_SHARED_LIBS=OFF
+ -DCLANG_LINK_CLANG_DYLIB=ON
+ -DLLVM_DISTRIBUTION_COMPONENTS=$(get_distribution_components)
+
+ -DLLVM_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+ -DLLVM_BUILD_TESTS=$(usex test)
+
+ # these are not propagated reliably, so redefine them
+ -DLLVM_ENABLE_EH=ON
+ -DLLVM_ENABLE_RTTI=ON
+
+ -DCMAKE_DISABLE_FIND_PACKAGE_LibXml2=$(usex !xml)
+ # libgomp support fails to find headers without explicit -I
+ # furthermore, it provides only syntax checking
+ -DCLANG_DEFAULT_OPENMP_RUNTIME=libomp
+
+ # override default stdlib and rtlib
+ -DCLANG_DEFAULT_CXX_STDLIB=$(usex default-libcxx libc++ "")
+ -DCLANG_DEFAULT_RTLIB=$(usex default-compiler-rt compiler-rt "")
+
+ -DCLANG_ENABLE_ARCMT=$(usex static-analyzer)
+ -DCLANG_ENABLE_STATIC_ANALYZER=$(usex static-analyzer)
+ )
+ use test && mycmakeargs+=(
+ -DLLVM_MAIN_SRC_DIR="${WORKDIR}/x/y/llvm"
+ -DLLVM_LIT_ARGS="-vv;-j;${LIT_JOBS:-$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")}"
+ )
+
+ if multilib_is_native_abi; then
+ mycmakeargs+=(
+ # normally copied from LLVM_INCLUDE_DOCS but the latter
+ # is lacking value in stand-alone builds
+ -DCLANG_INCLUDE_DOCS=$(usex doc)
+ -DCLANG_TOOLS_EXTRA_INCLUDE_DOCS=$(usex doc)
+ )
+ use doc && mycmakeargs+=(
+ -DLLVM_BUILD_DOCS=ON
+ -DLLVM_ENABLE_SPHINX=ON
+ -DCLANG_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+ -DCLANG-TOOLS_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/tools-extra"
+ -DSPHINX_WARNINGS_AS_ERRORS=OFF
+ )
+ else
+ mycmakeargs+=(
+ -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF
+ )
+ fi
+
+ if [[ -n ${EPREFIX} ]]; then
+ mycmakeargs+=(
+ -DGCC_INSTALL_PREFIX="${EPREFIX}/usr"
+ )
+ fi
+
+ if tc-is-cross-compiler; then
+ [[ -x "/usr/bin/clang-tblgen" ]] \
+ || die "/usr/bin/clang-tblgen not found or usable"
+ mycmakeargs+=(
+ -DCMAKE_CROSSCOMPILING=ON
+ -DCLANG_TABLEGEN=/usr/bin/clang-tblgen
+ )
+ fi
+
+ # LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+ use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+ cmake-utils_src_configure
+
+ multilib_is_native_abi && check_distribution_components
+}
+
+multilib_src_compile() {
+ cmake-utils_src_compile
+
+ # provide a symlink for tests
+ if [[ ! -L ${WORKDIR}/lib/clang ]]; then
+ mkdir -p "${WORKDIR}"/lib || die
+ ln -s "${BUILD_DIR}/$(get_libdir)/clang" "${WORKDIR}"/lib/clang || die
+ fi
+}
+
+multilib_src_test() {
+ # respect TMPDIR!
+ local -x LIT_PRESERVES_TMP=1
+ cmake-utils_src_make check-clang
+ multilib_is_native_abi &&
+ cmake-utils_src_make check-clang-tools check-clangd
+}
+
+src_install() {
+ MULTILIB_WRAPPED_HEADERS=(
+ /usr/include/clang/Config/config.h
+ )
+
+ multilib-minimal_src_install
+
+ # Move runtime headers to /usr/lib/clang, where they belong
+ mv "${ED}"/usr/include/clangrt "${ED}"/usr/lib/clang || die
+ # move (remaining) wrapped headers back
+ mv "${ED}"/usr/include "${ED}"/usr/lib/llvm/${SLOT}/include || die
+
+ # Apply CHOST and version suffix to clang tools
+ # note: we use two version components here (vs 3 in runtime path)
+ local llvm_version=$(llvm-config --version) || die
+ local clang_version=$(ver_cut 1 "${llvm_version}")
+ local clang_full_version=$(ver_cut 1-3 "${llvm_version}")
+ local clang_tools=( clang clang++ clang-cl clang-cpp )
+ local abi i
+
+ # cmake gives us:
+ # - clang-X
+ # - clang -> clang-X
+ # - clang++, clang-cl, clang-cpp -> clang
+ # we want to have:
+ # - clang-X
+ # - clang++-X, clang-cl-X, clang-cpp-X -> clang-X
+ # - clang, clang++, clang-cl, clang-cpp -> clang*-X
+ # also in CHOST variant
+ for i in "${clang_tools[@]:1}"; do
+ rm "${ED}/usr/lib/llvm/${SLOT}/bin/${i}" || die
+ dosym "clang-${clang_version}" "/usr/lib/llvm/${SLOT}/bin/${i}-${clang_version}"
+ dosym "${i}-${clang_version}" "/usr/lib/llvm/${SLOT}/bin/${i}"
+ done
+
+ # now create target symlinks for all supported ABIs
+ for abi in $(get_all_abis); do
+ local abi_chost=$(get_abi_CHOST "${abi}")
+ for i in "${clang_tools[@]}"; do
+ dosym "${i}-${clang_version}" \
+ "/usr/lib/llvm/${SLOT}/bin/${abi_chost}-${i}-${clang_version}"
+ dosym "${abi_chost}-${i}-${clang_version}" \
+ "/usr/lib/llvm/${SLOT}/bin/${abi_chost}-${i}"
+ done
+ done
+
+ # Remove unnecessary headers on FreeBSD, bug #417171
+ if use kernel_FreeBSD; then
+ rm "${ED}"/usr/lib/clang/${clang_full_version}/include/{std,float,iso,limits,tgmath,varargs}*.h || die
+ fi
+}
+
+multilib_src_install() {
+ DESTDIR=${D} cmake-utils_src_make install-distribution
+
+ # move headers to /usr/include for wrapping & ABI mismatch checks
+ # (also drop the version suffix from runtime headers)
+ rm -rf "${ED}"/usr/include || die
+ mv "${ED}"/usr/lib/llvm/${SLOT}/include "${ED}"/usr/include || die
+ mv "${ED}"/usr/lib/llvm/${SLOT}/$(get_libdir)/clang "${ED}"/usr/include/clangrt || die
+}
+
+multilib_src_install_all() {
+ python_fix_shebang "${ED}"
+ if use static-analyzer; then
+ python_optimize "${ED}"/usr/lib/llvm/${SLOT}/share/scan-view
+ fi
+
+ docompress "/usr/lib/llvm/${SLOT}/share/man"
+ # match 'html' non-compression
+ use doc && docompress -x "/usr/share/doc/${PF}/tools-extra"
+ # +x for some reason; TODO: investigate
+ use static-analyzer && fperms a-x "/usr/lib/llvm/${SLOT}/share/man/man1/scan-build.1"
+}
+
+pkg_postinst() {
+ if [[ -z ${ROOT} && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+ eselect compiler-shadow update all
+ fi
+
+ elog "You can find additional utility scripts in:"
+ elog " ${EROOT}/usr/lib/llvm/${SLOT}/share/clang"
+ elog "Some of them are vim integration scripts (with instructions inside)."
+ elog "The run-clang-tidy.py script requires the following additional package:"
+ elog " dev-python/pyyaml"
+}
+
+pkg_postrm() {
+ if [[ -z ${ROOT} && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+ eselect compiler-shadow clean all
+ fi
+}
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