Remove GCC_VERSION_AT_LEAST guards (and guarded code if possible) when it checks for pre-4.7 versions. According to bug 127049, 4.7 is the minimum supported gcc version.
Created attachment 224053 [details]
clang is also seen as gcc. I think it causes no problem in these situations.
Comment on attachment 224053 [details]
Clearing flags on attachment: 224053
Committed r164032: <http://trac.webkit.org/changeset/164032>
All reviewed patches have been landed. Closing bug.