-# llvm-gcc4 doesn't need runtime libs.
-ifeq ($(LLVMGCC_MAJVERS),4)
+# llvm-gcc4 doesn't need runtime libs. llvm-gcc4 is the only supported one.
+# FIXME: Remove runtime entirely once we have an understanding of where
+# libprofile etc should go.
+#ifeq ($(LLVMGCC_MAJVERS),4)