http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45819
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-09-28 16:04:38 UTC --- As a matter of clean implementation I suggest to do struct st { int ptr; } __attribute__ ((packed,aligned(__alignof__(int)))); (why use packed if the int is always aligned?)