http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49271
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-06-04 16:22:18 UTC --- > I don't use Mac OS X ... I do;-) The simplest ways are to build it either with fink ( http://www.finkproject.org/ : gcc4.5.2) or macports ( http://www.macports.org/ : gcc4.5.3 or 4.6 beta).