http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50816 --- Comment #1 from Anitha Boyapati <anitha.boyapati at atmel dot com> 2011-10-21 03:17:20 UTC --- http://gcc.gnu.org/ml/gcc/2011-10/msg00348.html The fix in trunk should be backported to gcc-4_6-branch.