--- /dev/null
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+PYTHON_COMPAT=( python2_7 )
+
+inherit check-reqs cmake-utils flag-o-matic git-r3 multilib-minimal \
+ python-single-r1 toolchain-funcs pax-utils versionator
+
+DESCRIPTION="C language family frontend for LLVM"
+HOMEPAGE="http://llvm.org/"
+SRC_URI=""
+EGIT_REPO_URI="http://llvm.org/git/clang.git
+ https://github.com/llvm-mirror/clang.git"
+EGIT_BRANCH="release_40"
+EGIT_COMMIT="3a631d565d41270fa80cb3d1e43a50d24cfc2f20"
+
+# Keep in sync with sys-devel/llvm
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM BPF Hexagon Lanai Mips MSP430
+ NVPTX PowerPC RISCV Sparc SystemZ X86 XCore )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/?}
+
+LICENSE="UoI-NCSA"
+SLOT="0/$(get_major_version)"
+KEYWORDS=""
+IUSE="debug default-compiler-rt default-libcxx +doc multitarget python
+ +static-analyzer test xml elibc_musl kernel_FreeBSD ${ALL_LLVM_TARGETS[*]}"
+
+RDEPEND="
+ ~sys-devel/llvm-${PV}:=[debug=,${LLVM_TARGET_USEDEPS// /,},${MULTILIB_USEDEP}]
+ static-analyzer? ( dev-lang/perl:* )
+ xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+ !<sys-devel/llvm-${PV}
+ ${PYTHON_DEPS}"
+# configparser-3.2 breaks the build (3.3 or none at all are fine)
+DEPEND="${RDEPEND}
+ doc? ( dev-python/sphinx )
+ test? ( ~dev-python/lit-${PV}[${PYTHON_USEDEP}] )
+ xml? ( virtual/pkgconfig )
+ !!<dev-python/configparser-3.3.0.2
+ ${PYTHON_DEPS}"
+PDEPEND="
+ ~sys-devel/clang-runtime-${PV}
+ default-compiler-rt? ( sys-libs/compiler-rt )
+ default-libcxx? ( sys-libs/libcxx )"
+
+REQUIRED_USE="${PYTHON_REQUIRED_USE}
+ || ( ${ALL_LLVM_TARGETS[*]} )
+ multitarget? ( ${ALL_LLVM_TARGETS[*]} )"
+
+# 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).
+
+check_space() {
+ local build_size=650
+
+ if use debug; then
+ ewarn "USE=debug is known to increase the size of package considerably"
+ ewarn "and cause the tests to fail."
+ ewarn
+
+ (( build_size *= 14 ))
+ elif is-flagq '-g?(gdb)?([1-9])'; then
+ ewarn "The C++ compiler -g option is known to increase the size of the package"
+ ewarn "considerably. If you run out of space, please consider removing it."
+ ewarn
+
+ (( build_size *= 10 ))
+ fi
+
+ # Multiply by number of ABIs :).
+ local abis=( $(multilib_get_enabled_abis) )
+ (( build_size *= ${#abis[@]} ))
+
+ local CHECKREQS_DISK_BUILD=${build_size}M
+ check-reqs_pkg_pretend
+}
+
+pkg_pretend() {
+ check_space
+}
+
+pkg_setup() {
+ check_space
+
+ python-single-r1_pkg_setup
+}
+
+src_unpack() {
+ git-r3_fetch "http://llvm.org/git/clang-tools-extra.git
+ https://github.com/llvm-mirror/clang-tools-extra.git" \
+ fc0afbd6e7055b4d7f39998d743585683033c2d4
+ if use test; then
+ # needed for patched gtest
+ git-r3_fetch "http://llvm.org/git/llvm.git
+ https://github.com/llvm-mirror/llvm.git" \
+ c329efbc3c94928fb826ed146897aada0459c983
+ fi
+ git-r3_fetch
+
+ git-r3_checkout http://llvm.org/git/clang-tools-extra.git \
+ "${S}"/tools/clang/tools/extra
+ if use test; then
+ git-r3_checkout http://llvm.org/git/llvm.git \
+ "${WORKDIR}"/llvm
+ fi
+ git-r3_checkout
+}
+
+src_prepare() {
+ python_setup
+
+ # fix stand-alone doc build
+ eapply "${FILESDIR}"/9999/0007-cmake-Support-stand-alone-Sphinx-doxygen-doc-build.patch
+
+ # User patches
+ eapply_user
+}
+
+multilib_src_configure() {
+ local llvm_version=$(llvm-config --version) || die
+ local clang_version=$(get_version_component_range 1-3 "${llvm_version}")
+ local mycmakeargs=(
+ # ensure that the correct llvm-config is used
+ -DLLVM_CONFIG="${EPREFIX}/usr/bin/${CHOST}-llvm-config"
+ # 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)
+ )
+ use test && mycmakeargs+=(
+ -DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
+ -DLIT_COMMAND="${EPREFIX}/usr/bin/lit"
+ )
+
+ if multilib_is_native_abi; then
+ mycmakeargs+=(
+ -DLLVM_BUILD_DOCS=$(usex doc)
+ -DLLVM_ENABLE_SPHINX=$(usex doc)
+ -DLLVM_ENABLE_DOXYGEN=OFF
+ )
+ use doc && mycmakeargs+=(
+ -DCLANG_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+ -DSPHINX_WARNINGS_AS_ERRORS=OFF
+ )
+ else
+ mycmakeargs+=(
+ -DLLVM_EXTERNAL_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
+
+ cmake-utils_src_configure
+}
+
+multilib_src_compile() {
+ cmake-utils_src_compile
+
+ # provide a symlink for tests
+ if [[ $(get_libdir) != lib ]]; then
+ ln -s "../$(get_libdir)/clang" lib/clang || die
+ fi
+}
+
+multilib_src_test() {
+ # respect TMPDIR!
+ local -x LIT_PRESERVES_TMP=1
+ cmake-utils_src_make check-clang
+}
+
+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
+ dodir /usr/lib
+ mv "${ED}usr/include/clangrt" "${ED}usr/lib/clang" || die
+
+ # Apply CHOST and version suffix to clang tools
+ # note: we use two version components here (vs 3 in runtime path)
+ local llvm_version=$(llvm-config --version) || die
+ local clang_version=$(get_version_component_range 1-2 "${llvm_version}")
+ local clang_tools=( clang clang++ clang-cl clang-cpp )
+ local abi i
+
+ # cmake gives us:
+ # - clang-X.Y
+ # - clang -> clang-X.Y
+ # - clang++, clang-cl, clang-cpp -> clang
+ # we want to have:
+ # - clang-X.Y
+ # - clang++-X.Y, clang-cl-X.Y, clang-cpp-X.Y -> clang-X.Y
+ # - clang, clang++, clang-cl, clang-cpp -> clang*-X.Y
+ # also in CHOST variant
+ for i in "${clang_tools[@]:1}"; do
+ rm "${ED%/}/usr/bin/${i}" || die
+ dosym "clang-${clang_version}" "/usr/bin/${i}-${clang_version}"
+ dosym "${i}-${clang_version}" "/usr/bin/${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/bin/${abi_chost}-${i}-${clang_version}"
+ dosym "${abi_chost}-${i}-${clang_version}" \
+ "/usr/bin/${abi_chost}-${i}"
+ done
+ done
+
+ # Remove unnecessary headers on FreeBSD, bug #417171
+ if use kernel_FreeBSD; then
+ rm "${ED}"usr/lib/clang/${PV}/include/{std,float,iso,limits,tgmath,varargs}*.h || die
+ fi
+}
+
+multilib_src_install() {
+ cmake-utils_src_install
+
+ # move headers to include/ to get them checked for ABI mismatch
+ # (then to the correct directory in src_install())
+ insinto /usr/include/clangrt
+ doins -r "${ED}usr/$(get_libdir)/clang"/.
+ rm -r "${ED}usr/$(get_libdir)/clang" || die
+}
+
+multilib_src_install_all() {
+ if use python ; then
+ pushd bindings/python/clang >/dev/null || die
+
+ python_moduleinto clang
+ python_domodule *.py
+
+ popd >/dev/null || die
+ fi
+
+ python_fix_shebang "${ED}"
+ if use static-analyzer; then
+ python_optimize "${ED}"usr/share/scan-view
+ fi
+}
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