Bug in sha512 digest with -march=native -mtune=native -m64

[Ian Abbott]

On 2013/06/20 09:16 AM, Werner Koch wrote:
> On Thu, 20 Jun 2013 07:48, pgut001 at cs.auckland.ac.nz said:
> 
>> I've had any problems since.  You don't lose much -O with -O2 (and in 
> 
> FWIW, the reason I switched to -O3 (if configured with
> --enable-maintainer-mode) is
> 
> 2009-10-12  Werner Koch
> 
>        * configure.ac: Use -O3 because newer gcc versions require that
>        for uninitialized variable warnings.
> 
> Which is a quite helpful warning.

Possibly fixed in gcc-4.4.

http://gcc.gnu.org/gcc-4.4/changes.html says:

Uninitialized warnings do not require enabling optimization anymore,
that is, -Wuninitialized can be used together with -O0. Nonetheless, the
warnings given by -Wuninitialized will probably be more accurate if
optimization is enabled.

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