--- llvm-3.3.src.orig/Makefile	2013-01-28 04:19:57.000000000 +0100
+++ llvm-3.3.src/Makefile	2013-08-12 14:50:49.000000000 +0200
@@ -110,6 +110,9 @@ cross-compile-build-tools:
 	$(Verb) if [ ! -f BuildTools/Makefile ]; then \
           $(MKDIR) BuildTools; \
 	  cd BuildTools ; \
+	  unset CC ; \
+	  unset CXX ; \
+	  unset RANLIB ; \
 	  unset CFLAGS ; \
 	  unset CXXFLAGS ; \
 	  unset SDKROOT ; \
