http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51628
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-20 10:52:19 UTC --- > The point is that even if you use sth like > > typedef int myint __attribute__((aligned(1))); > > to capture the misaligned pointer to the packed structure element: > > myint *p = &s->i; > > then accesses like '*p' will still assume an _aligned_ int at 'p' for > STRICT_ALIGNMENT targets. > > That's a long-long-long-standing bug and a cause of major headache for > more modern GCCs even ... That's a limitation rather than a bug. Clearly, on strict-alignment targets, you must know what you're doing when you start to misalign things. As for typedef int myint __attribute__((aligned(1))); that's an abomination I don't even want to know of ;-)
