http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53902
--- Comment #3 from T.J. Yang <tjyang2001 at gmail dot com> 2012-08-09 11:05:55 UTC --- Also at http://gcc.gnu.org/viewcvs/trunk/gcc/configure.ac?revision=189803&view=markup, around line 2461. the previous fix is included in gcc trunk.
