http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54806
--- Comment #7 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-10-05 14:58:31 UTC --- Also note from https://trac.macports.org/ticket/36093 that it appears that MacPorts is playing games with the libstdc++ which FSF gcc uses. This appears to be instigated by https://trac.macports.org/ticket/36092.