http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60523
--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- Octal literals are also used in macro definitions from system headers, so care would be needed that a warning doesn't apply to those. Such a warning should of course not apply to 0 (and maybe more generally should not apply to any octal constant consisting of some number of leading 0s followed by at most one nonzero digit, as those have the same value whether interpreted as octal or as decimal).
