http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59353
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> --- And looking at https://code.google.com/p/address-sanitizer/wiki/ExampleUseAfterReturn - it seems as if the options is called -fsanitize=use-after-return with Clang. Having different names for the same feature is a bit unfortunate, too. Especially as GCC -fsanitize= links to Wiki pages which are Clang centric.
