http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51906
--- Comment #50 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-02-03 17:52:39 UTC --- (In reply to comment #48) > (In reply to comment #46) > > Actually, using -mmacosx-version-min=10.6 > --sysroot=/Developer/SDKs/MacOSX10.6.sdk doesn't work as you end up with the > error... Please file a separate bug for that. This is just another example of libstdc++ assuming that the environment it sees at configure time is the same as it will see when being used.