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[Bug c/51628] __attribute__((packed)) is unsafe in some cases
- From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 20 Dec 2011 11:18:24 +0000
- Subject: [Bug c/51628] __attribute__((packed)) is unsafe in some cases
- Auto-submitted: auto-generated
- References: <bug-51628-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51628
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-20 11:18:24 UTC ---
> Huh, it's not. It's the same as a packed struct or enum type.
No, it isn't, the mode is integral instead of BLKmode. In Ada we do support
misaligned integers, but we simply wrap them in a BLKmode record.
> Why can't you strict-align people simply fix this case?
Because integral modes are naturally aligned. The only reasonable way to
support the aforementioned abomination is to use the Ada approach.