http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51628
--- Comment #19 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2013-04-03 07:29:51 UTC --- > Not sure if I can agree with (or understand) this comment. If we use my > example > of the address of an int in a packed structure being assigned to an int* then > one could argue that there is a kind of implicit cast happening. The pointer > is > to an integer WITH the default alignment which would be 4 on the ARM system I > work with. The int in the struct has an alignment of 1 and so the two types > need to be regarded as being incompatible and there should be an unconditional > warning or at least -Wcast-align should enable such a warning. Yes, a warning should probably be implemented in the C family of compilers, but this is a very old issue and nobody is really interested. Note that taking the address of the field is OK, the problem is dereferencing it.
