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Re: 4.0 regression: g++ class layout on PPC32 has changed
Andrew Haley <aph@redhat.com> wrote:
> > > public:
> > > long long __attribute__((aligned(__alignof__(
::java::lang::Object ))))
> > l;
> >
> > I don't recall the exact details, but I have fixed a couple of bugs
about
> > the use of __alignof__ and attribute aligned on members of classes
(maybe
> > templates only?). Are you positive this attribute declaration *does*
have
> an > effect at all in 3.4?
>
> It seems to be the other way around.
>
> The attribute declaration does have an effect in 3.4 -- the offset
> changes from 52 to 56 -- but it does not have any effect in 4.0, and
> this is what breaks my code.
Is __alignof__( ::java::lang::Object ) the same under 3.4 and 4.0 in the
first place?
My fixes were to parse more attributes, not less. So this has to be
unrelated to my patches. I suggest you file a bugreport in Bugzilla, and
mark it as ABI breaking. It should get fixed before 4.0 gets out.
--
Giovanni Bajo