http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51020
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-11-08 03:03:58 UTC --- Note that in 4.7 all options will be validated by the .opt machinery (producing "gcc: error: unrecognized command line option '---'") by the driver and only options passing that (and -Wno-* options) will then go through the specs validation as well. This may break things depending on the exact error message; it may also make this bug less significant because fewer cases will be left to be caught by the check against specs.