http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52122
--- Comment #10 from Daniel Starke <daniel.f.starke at freenet dot de> 2012-09-24 16:57:53 UTC --- Here is the reference to the autoconf change: http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=17ea0df46f819a9b64c21151983a5c5b8561fefb