Don't use GCC only warnings flags on clang.
Don't use GCC only warnings flags on clang.

git-svn-id: 1de41fbb8bf496e4a95b0915e2415d818c8215b0@4682 a436a847-0d15-0410-975c-d299462d15a1

ventosus/sratom,ventosus/sratom