This started out as an annoyance around the use of -Wno-clobber on Linux when the gcc might not support it. Turned into fixing several CC_VER checks in the makefiles:
7038711: Fix CC_VER checks for compiler options, fix use of -Wno-clobber http://cr.openjdk.java.net/~ohair/openjdk7/jdk7-build-ccver/webrev/ -kto
