http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51916
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-01-20 19:15:08 UTC --- > Try building the compiler without optimization (-O0). I have never done that!-(I guess I have to pass something like CFLAGS and CXXFLAGS in configure or make). What is the official way to do it?