sys-libs/libcxxabi: Build local copy of libc++ for tests

Build a local copy of libc++ when performing tests instead of depending
on system instance. This avoids a circular dependency, and also makes
it possible to build & test libcxxabi independently of the installed
libc++ variant.

1 files changed, 26 insertions, 3 deletions

diff --git a/sys-libs/libcxxabi/libcxxabi-6.0.9999.ebuild b/sys-libs/libcxxabi/libcxxabi-6.0.9999.ebuild
index b9675a9e147f..63e42c376c3d 100644
--- a/sys-libs/libcxxabi/libcxxabi-6.0.9999.ebuild
+++ b/sys-libs/libcxxabi/libcxxabi-6.0.9999.ebuild
@@ -20,7 +20,7 @@ EGIT_BRANCH="release_60"
 LICENSE="|| ( UoI-NCSA MIT )"
 SLOT="0"
 KEYWORDS=""
-IUSE="+libunwind +static-libs test"
+IUSE="+libunwind +static-libs test elibc_musl"
 RESTRICT="!test? ( test )"
 
 RDEPEND="
@@ -34,7 +34,6 @@ RDEPEND="
 DEPEND="${RDEPEND}
 	>=sys-devel/llvm-6
 	test? ( >=sys-devel/clang-3.9.0
-		~sys-libs/libcxx-${PV}[libcxxabi(-)]
 		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )"
 
 # least intrusive of all
@@ -56,7 +55,7 @@ src_unpack() {
 	git-r3_fetch
 
 	git-r3_checkout https://llvm.org/git/libcxx.git \
-		"${WORKDIR}"/libcxx '' include utils/libcxx
+		"${WORKDIR}"/libcxx ''
 	git-r3_checkout
 }
 
@@ -83,12 +82,36 @@ multilib_src_configure() {
 	cmake-utils_src_configure
 }
 
+build_libcxx() {
+	local CMAKE_USE_DIR=${WORKDIR}/libcxx
+	local BUILD_DIR=${BUILD_DIR}/libcxx
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=OFF
+		-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF
+		-DLIBCXX_CXX_ABI=libcxxabi
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS="${S}"/include
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=OFF
+		-DLIBCXX_INCLUDE_TESTS=OFF
+	)
+
+	cmake-utils_src_configure
+	cmake-utils_src_compile
+}
+
 multilib_src_test() {
 	local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
 
 	[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
 	sed -i -e "/cxx_under_test/s^\".*\"^\"${clang_path}\"^" test/lit.site.cfg || die
 
+	# build a local copy of libc++ for testing to avoid circular dep
+	build_libcxx
+	cp "${BUILD_DIR}"/libcxx/lib/libc++* "${BUILD_DIR}/$(get_libdir)/" || die
+
 	cmake-utils_src_make check-libcxxabi
 }