http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48082
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-03-12 02:20:31 UTC --- (In reply to comment #3) > Ok, for the sake of my curiosity, could you explain why it is only an "issue" > when compiling with the 64 bit libraries? Because va_list is target specific and x86_64 defines it as an array while 32bit does not.