http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47613
--- Comment #8 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> 2011-02-05 17:57:09 UTC --- Do you have environment variables set for buffering or non-buffering? I am on Fedora 14 and don't see it. Its puzzling. Have you tried clean bootstrap with an empty install directory?