--- /usr/portage/sys-devel/llvm/llvm-3.3-r1.ebuild	2013-11-10 16:31:33.000000000 +0100
+++ sys-devel/llvm/llvm-3.3-r1.ebuild	2013-12-20 14:57:47.665685411 +0100
@@ -6,7 +6,7 @@
 
 PYTHON_COMPAT=( python{2_6,2_7} pypy2_0 )
 
-inherit eutils flag-o-matic multilib multilib-minimal \
+inherit cmake-utils eutils flag-o-matic multilib multilib-minimal \
 	python-r1 toolchain-funcs pax-utils check-reqs
 
 DESCRIPTION="Low Level Virtual Machine"
@@ -251,6 +251,22 @@
 
 	ECONF_SOURCE=${S} \
 	econf ${CONF_FLAGS}
+
+	multilib_build_binaries && cmake_configure
+}
+
+cmake_configure() {
+	# sadly, cmake doesn't seem to have host autodetection
+	# but it's fairly easy to steal this from configured autotools
+	local targets=$(sed -n -e 's/^TARGETS_TO_BUILD=//p' Makefile.config || die)
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLLVM_TARGETS_TO_BUILD="${targets// /;}"
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+	)
+
+	BUILD_DIR=${S%/}_cmake \
+	cmake-utils_src_configure
 }
 
 multilib_src_compile() {
@@ -299,6 +315,7 @@
 
 multilib_src_install() {
 	emake DESTDIR="${D}" GENTOO_LIBDIR=$(get_libdir) install
+	emake -C "${S%/}"_cmake/cmake/modules DESTDIR="${D}" install
 
 	# Fix rpaths.
 	if use !kernel_Darwin ; then