--- llvm-3.8.0-r2.ebuild.old	2016-06-12 23:54:20.583749524 -0400
+++ llvm-3.8.0-r2.ebuild	2016-06-13 19:37:05.757431300 -0400
@@ -358,6 +358,28 @@
 		#filter-flags -msahf -frecord-gcc-switches
 	fi
 
+	if tc-is-cross-compiler; then
+		strip-flags
+		filter-flags -O*
+		[[ ${CXX} == *clang* ]] && \
+			append-flags -target ${CHOST} --sysroot="${SYSROOT}"
+
+		[[ -x "/usr/bin/llvm-tblgen" ]] || \
+			die "/usr/bin/llvm-tblgen not found or usable"
+		mycmakeargs+=(
+			-DCMAKE_CROSSCOMPILING=True
+			-DLLVM_TABLEGEN=/usr/bin/llvm-tblgen
+		)
+
+		if use clang; then
+			[[ -x "/usr/bin/clang-tblgen" ]] || \
+				die "/usr/bin/clang-tblgen not found or usable"
+			mycmakeargs+=(-DCLANG_TABLEGEN=/usr/bin/clang-tblgen)
+			[[ ${CXX} == *clang* ]] && \
+				mycmakeargs+=(-DLLVM_ENABLE_PIC=False)
+		fi
+	fi
+
 	cmake-utils_src_configure
 }