http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54847
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-07 18:02:30 UTC --- As far as Darwin is concerned, simply, somebody knowing the target well has to work out the details. So far, we only made sure that things work reasonably well on GNU/Linux machines. Patches are welcome, as usual.