--- /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 check-reqs cmake-utils flag-o-matic llvm llvm.org \
+ multiprocessing python-any-r1
+
+DESCRIPTION="Compiler runtime libraries for clang (sanitizers & xray)"
+HOMEPAGE="https://llvm.org/"
+LLVM_COMPONENTS=( compiler-rt )
+LLVM_TEST_COMPONENTS=( llvm/lib/Testing/Support llvm/utils/unittest )
+llvm.org_set_globals
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="$(ver_cut 1-3)"
+KEYWORDS=""
+IUSE="+clang +libfuzzer +profile +sanitize test +xray elibc_glibc"
+# FIXME: libfuzzer does not enable all its necessary dependencies
+REQUIRED_USE="libfuzzer? ( || ( sanitize xray ) )"
+RESTRICT="!test? ( test ) !clang? ( test )"
+
+CLANG_SLOT=${SLOT%%.*}
+# llvm-6 for new lit options
+DEPEND="
+ >=sys-devel/llvm-6"
+BDEPEND="
+ clang? ( sys-devel/clang )
+ elibc_glibc? ( net-libs/libtirpc )
+ test? (
+ !<sys-apps/sandbox-2.13
+ $(python_gen_any_dep ">=dev-python/lit-5[\${PYTHON_USEDEP}]")
+ =sys-devel/clang-${PV%_*}*:${CLANG_SLOT}
+ sys-libs/compiler-rt:${SLOT} )
+ ${PYTHON_DEPS}"
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+ use test || return 0
+ has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+check_space() {
+ if use test; then
+ local CHECKREQS_DISK_BUILD=11G
+ check-reqs_pkg_pretend
+ fi
+}
+
+pkg_pretend() {
+ check_space
+}
+
+pkg_setup() {
+ check_space
+ llvm_pkg_setup
+ python-any-r1_pkg_setup
+}
+
+src_configure() {
+ # pre-set since we need to pass it to cmake
+ BUILD_DIR=${WORKDIR}/compiler-rt_build
+
+ if use clang; then
+ local -x CC=${CHOST}-clang
+ local -x CXX=${CHOST}-clang++
+ strip-unsupported-flags
+ fi
+
+ local mycmakeargs=(
+ -DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${SLOT}"
+ # use a build dir structure consistent with install
+ # this makes it possible to easily deploy test-friendly clang
+ -DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${SLOT}"
+
+ -DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
+ # builtins & crt installed by sys-libs/compiler-rt
+ -DCOMPILER_RT_BUILD_BUILTINS=OFF
+ -DCOMPILER_RT_BUILD_CRT=OFF
+ -DCOMPILER_RT_BUILD_LIBFUZZER=$(usex libfuzzer)
+ -DCOMPILER_RT_BUILD_PROFILE=$(usex profile)
+ -DCOMPILER_RT_BUILD_SANITIZERS=$(usex sanitize)
+ -DCOMPILER_RT_BUILD_XRAY=$(usex xray)
+ )
+ if use test; then
+ mycmakeargs+=(
+ -DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
+ -DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+ -DLLVM_LIT_ARGS="-vv;-j;${LIT_JOBS:-$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")}"
+
+ # they are created during src_test()
+ -DCOMPILER_RT_TEST_COMPILER="${BUILD_DIR}/lib/llvm/${CLANG_SLOT}/bin/clang"
+ -DCOMPILER_RT_TEST_CXX_COMPILER="${BUILD_DIR}/lib/llvm/${CLANG_SLOT}/bin/clang++"
+ )
+
+ # same flags are passed for build & tests, so we need to strip
+ # them down to a subset supported by clang
+ CC=${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang \
+ CXX=${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang++ \
+ strip-unsupported-flags
+ fi
+
+ if use prefix && [[ "${CHOST}" == *-darwin* ]] ; then
+ mycmakeargs+=(
+ # disable use of SDK for the system itself
+ -DDARWIN_macosx_CACHED_SYSROOT=/
+ )
+ fi
+
+ cmake-utils_src_configure
+
+ if use test; then
+ local sys_dir=( "${EPREFIX}"/usr/lib/clang/${SLOT}/lib/* )
+ [[ -e ${sys_dir} ]] || die "Unable to find ${sys_dir}"
+ [[ ${#sys_dir[@]} -eq 1 ]] || die "Non-deterministic compiler-rt install: ${sys_dir[*]}"
+
+ # copy clang over since resource_dir is located relatively to binary
+ # therefore, we can put our new libraries in it
+ mkdir -p "${BUILD_DIR}"/lib/{llvm/${CLANG_SLOT}/{bin,$(get_libdir)},clang/${SLOT}/include} || die
+ cp "${EPREFIX}"/usr/lib/llvm/${CLANG_SLOT}/bin/clang{,++} \
+ "${BUILD_DIR}"/lib/llvm/${CLANG_SLOT}/bin/ || die
+ cp "${EPREFIX}"/usr/lib/clang/${SLOT}/include/*.h \
+ "${BUILD_DIR}"/lib/clang/${SLOT}/include/ || die
+ cp "${sys_dir}"/*builtins*.a \
+ "${BUILD_DIR}/lib/clang/${SLOT}/lib/${sys_dir##*/}/" || die
+ # we also need LLVMgold.so for gold-based tests
+ if [[ -f ${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/$(get_libdir)/LLVMgold.so ]]; then
+ ln -s "${EPREFIX}"/usr/lib/llvm/${CLANG_SLOT}/$(get_libdir)/LLVMgold.so \
+ "${BUILD_DIR}"/lib/llvm/${CLANG_SLOT}/$(get_libdir)/ || die
+ fi
+ fi
+}
+
+src_test() {
+ # respect TMPDIR!
+ local -x LIT_PRESERVES_TMP=1
+ # disable sandbox to have it stop clobbering LD_PRELOAD
+ local -x SANDBOX_ON=0
+ # wipe LD_PRELOAD to make ASAN happy
+ local -x LD_PRELOAD=
+
+ cmake-utils_src_make check-all
+}