--- llvm-2.9.orig/Makefile	2010-11-29 19:16:10.000000000 +0100
+++ llvm-2.9/Makefile	2011-06-25 12:16:13.422682536 +0200
@@ -115,6 +115,8 @@ cross-compile-build-tools:
 	$(Verb) if [ ! -f BuildTools/Makefile ]; then \
           $(MKDIR) BuildTools; \
 	  cd BuildTools ; \
+	  unset CC ; \
+	  unset CXX ; \
 	  unset CFLAGS ; \
 	  unset CXXFLAGS ; \
 	  $(PROJ_SRC_DIR)/configure --build=$(BUILD_TRIPLE) \
