--- /dev/null
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+PYTHON_COMPAT=( python2_7 )
+
+inherit cmake-utils eapi7-ver flag-o-matic llvm \
+ multilib-minimal pax-utils prefix python-single-r1 toolchain-funcs
+
+MY_P=cfe-${PV/_/}.src
+EXTRA_P=clang-tools-extra-${PV/_/}.src
+LLVM_P=llvm-${PV/_/}.src
+
+DESCRIPTION="C language family frontend for LLVM"
+HOMEPAGE="https://llvm.org/"
+SRC_URI="http://prereleases.llvm.org/${PV/_//}/${MY_P}.tar.xz
+ http://prereleases.llvm.org/${PV/_//}/${EXTRA_P}.tar.xz
+ test? ( http:/pre/releases.llvm.org/${PV/_//}/${LLVM_P}.tar.xz )"
+# !doc? ( https://dev.gentoo.org/~mgorny/dist/llvm/llvm-${PV}-manpages.tar.bz2 )"
+
+# Keep in sync with sys-devel/llvm
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM BPF Hexagon Lanai Mips MSP430
+ NVPTX PowerPC Sparc SystemZ X86 XCore )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/?}
+
+LICENSE="UoI-NCSA"
+SLOT="$(ver_cut 1)"
+KEYWORDS=""
+IUSE="debug default-compiler-rt default-libcxx doc +static-analyzer
+ test xml z3 kernel_FreeBSD ${ALL_LLVM_TARGETS[*]}"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+ ~sys-devel/llvm-${PV}:${SLOT}=[debug=,${LLVM_TARGET_USEDEPS// /,},${MULTILIB_USEDEP}]
+ static-analyzer? (
+ dev-lang/perl:*
+ z3? ( sci-mathematics/z3:0= )
+ )
+ xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+ ${PYTHON_DEPS}"
+# configparser-3.2 breaks the build (3.3 or none at all are fine)
+DEPEND="${RDEPEND}
+ doc? ( dev-python/sphinx )
+ xml? ( virtual/pkgconfig )
+ !!<dev-python/configparser-3.3.0.2
+ ${PYTHON_DEPS}"
+RDEPEND="${RDEPEND}
+ !<sys-devel/llvm-4.0.0_rc:0
+ !sys-devel/clang:0"
+PDEPEND="
+ ~sys-devel/clang-runtime-${PV}
+ default-compiler-rt? ( =sys-libs/compiler-rt-${PV%_*}* )
+ default-libcxx? ( sys-libs/libcxx )"
+
+REQUIRED_USE="${PYTHON_REQUIRED_USE}
+ || ( ${ALL_LLVM_TARGETS[*]} )"
+
+# We need extra level of indirection for CLANG_RESOURCE_DIR
+S=${WORKDIR}/x/y/${MY_P}
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+PATCHES=(
+ # add Prefix include paths for Darwin
+ "${FILESDIR}"/5.0.1/darwin_prefix-include-paths.patch
+)
+
+# 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
+
+ einfo "Unpacking ${MY_P}.tar.xz ..."
+ tar -xf "${DISTDIR}/${MY_P}.tar.xz" || die
+ einfo "Unpacking ${EXTRA_P}.tar.xz ..."
+ tar -xf "${DISTDIR}/${EXTRA_P}.tar.xz" || die
+
+ mv "${EXTRA_P}" "${S}"/tools/extra || die
+ if use test; then
+ einfo "Unpacking parts of ${LLVM_P}.tar.xz ..."
+ tar -xf "${DISTDIR}/${LLVM_P}.tar.xz" \
+ "${LLVM_P}"/utils/{lit,llvm-lit,unittest} || die
+ mv "${LLVM_P}" "${WORKDIR}"/llvm || die
+ fi
+
+# if ! use doc; then
+# einfo "Unpacking llvm-${PV}-manpages.tar.bz2 ..."
+# tar -xf "${DISTDIR}/llvm-${PV}-manpages.tar.bz2" || die
+# fi
+}
+
+src_prepare() {
+ cmake-utils_src_prepare
+ eprefixify lib/Frontend/InitHeaderSearch.cpp
+}
+
+multilib_src_configure() {
+ local llvm_version=$(llvm-config --version) || die
+ local clang_version=$(ver_cut 1-3 "${llvm_version}")
+
+ local mycmakeargs=(
+ # ensure that the correct llvm-config is used
+ -DLLVM_CONFIG="$(type -P "${CHOST}-llvm-config")"
+ -DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${SLOT}"
+ # relative to bindir
+ -DCLANG_RESOURCE_DIR="../../../../lib/clang/${clang_version}"
+
+ -DBUILD_SHARED_LIBS=ON
+ -DLLVM_TARGETS_TO_BUILD="${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)
+ # z3 is not multilib-friendly
+ -DCLANG_ANALYZER_BUILD_Z3=$(multilib_native_usex z3)
+ )
+ use test && mycmakeargs+=(
+ -DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
+ -DLLVM_LIT_ARGS="-vv"
+ )
+
+ 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
+ )
+ use z3 && mycmakeargs+=(
+ -DZ3_INCLUDE_DIR="${EPREFIX}/usr/include/z3"
+ )
+ else
+ mycmakeargs+=(
+ -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF
+ )
+ fi
+
+ if tc-is-cross-compiler; then
+ [[ -x "/usr/bin/clang-tblgen" ]] \
+ || die "/usr/bin/clang-tblgen not found or usable"
+ mycmakeargs+=(
+ -DCMAKE_CROSSCOMPILING=ON
+ -DCLANG_TABLEGEN=/usr/bin/clang-tblgen
+ )
+ fi
+
+ # LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+ use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+ cmake-utils_src_configure
+}
+
+multilib_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" "${WORKDIR}"/lib/clang || die
+ fi
+}
+
+multilib_src_test() {
+ # respect TMPDIR!
+ local -x LIT_PRESERVES_TMP=1
+ cmake-utils_src_make check-clang
+ multilib_is_native_abi && cmake-utils_src_make check-clang-tools
+}
+
+src_install() {
+ MULTILIB_WRAPPED_HEADERS=(
+ /usr/include/clang/Config/config.h
+ )
+
+ multilib-minimal_src_install
+
+ # Move runtime headers to /usr/lib/clang, where they belong
+ mv "${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 1-2 "${llvm_version}")
+ local clang_full_version=$(ver_cut 1-3 "${llvm_version}")
+ local clang_tools=( clang clang++ clang-cl clang-cpp )
+ local abi i
+
+ # cmake gives us:
+ # - clang-X.Y
+ # - clang -> clang-X.Y
+ # - clang++, clang-cl, clang-cpp -> clang
+ # we want to have:
+ # - clang-X.Y
+ # - clang++-X.Y, clang-cl-X.Y, clang-cpp-X.Y -> clang-X.Y
+ # - clang, clang++, clang-cl, clang-cpp -> clang*-X.Y
+ # also in CHOST variant
+ for i in "${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() {
+ cmake-utils_src_install
+
+ # 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/${SLOT}/share/scan-view
+ fi
+
+ # install pre-generated manpages
+# if ! use doc; then
+# insinto "/usr/lib/llvm/${SLOT}/share/man/man1"
+# doins "${WORKDIR}/x/y/llvm-${PV}-manpages/clang"/*.1
+# 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 [[ ${ROOT} == / && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+ eselect compiler-shadow update all
+ fi
+}
+
+pkg_postrm() {
+ if [[ ${ROOT} == / && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+ eselect compiler-shadow clean all
+ fi
+}
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