Avoid GCC 4.7 optimization in elf/soinit.c

[Richard Guenther]

On Tue, 27 Sep 2011, Andreas Schwab wrote:

> Andreas Jaeger <aj@suse.de> writes:
> 
> > We recently got a bug report and analysis showed that gcc 4.7 optimized 
> > __libc_fini and __libc_global_ctors to empty functions since it checked the 
> > size of __CTOR_LIST__ and does not know that glibc changes the size at link 
> > time.
> >
> > Bug report is:
> > https://bugzilla.novell.com/show_bug.cgi?id=717671
> >
> > I'm appending a patch that fixes the problem,
> 
> A better approach is perhaps to make __[CD]TOR_LIST__ volatile.

That would not disable deriving loop trip counts from the array
size we see (not that we do this at the moment).

Richard.

-- 
Richard Guenther <rguenther@suse.de>
SUSE / SUSE Labs
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