Index: test/make/Makefile.rules
===================================================================
--- test/make/Makefile.rules
+++ test/make/Makefile.rules
@@ -69,7 +69,13 @@
 #----------------------------------------------------------------------
 CC ?= clang
 ifeq "$(CC)" "cc"
-	CC = clang
+	ifneq "$(shell which clang)" ""
+		CC = clang
+	else ifneq "$(shell which clang-3.5)" ""
+		CC = clang-3.5
+	else ifneq "$(shell which gcc)" ""
+		CC = gcc
+	endif
 endif
 
 #----------------------------------------------------------------------