[m-rev.] diff: avoid excessive compilation times on Mac OS X in debug grades

[Julien Fischer]

On Tue, 18 May 2010, Zoltan Somogyi wrote:

> On 17-May-2010, Julien Fischer <juliensf at csse.unimelb.edu.au> wrote:
>> On Mac OS X force the debug grades to be compiled by GCC at -O0.
>> Using -O2 (the default), results in excessive compilation times.
>
> What about -O1?

No, we encounter the same performance problem at -O1.

> Any idea *which* optimization is causing this? Can we disable just that one?

I'm still looking into that - if I can identify something I will adjust
the patch accordingly.

Julien.
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