[Bug middle-end/22275] [3.4/4.0/4.1 Regression] bitfield layout change (regression?)

["mark at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #7 from mark at codesourcery dot com  2005-10-31 07:44 -------
Subject: Re:  [3.4/4.0/4.1 Regression] bitfield layout
 change (regression?)

steven at gcc dot gnu dot org wrote:
> ------- Comment #6 from steven at gcc dot gnu dot org  2005-10-31 07:21 -------
> This was not a show stopper for GCC 3.4 and GCC 4.0.  Why is it a show stopper
> now for GCC 4.1?
> 
> And we can't unconditionally change it back now.  We already have GCC 3.4 and
> 4.0 based compilers in production environments.

I suspect you didn't realize that the PR wasn't opened until July; I had
no knowledge of it when 3.4 or 4.0 were released.  If I had, I would
have declared it a showstopper then.

Now, it's a showstopper to figure out what happened and make an informed
decision.  If we conform to a published ABI where we did not before,
maybe we do nothing; this is a bug fix.  If we now fail to conform to a
published ABI, maybe we add a switch.  But, we certainly have to
evaluate it before the release.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22275