On Sun, Apr 17, 2011 at 11:37 AM, Martin Spott wrote:
> Christian Schmitt wrote:
> > Martin Spott wrote:
>
> > The O2 flag was set for all tries but it's not the problem here. The
> problem
> > are certain -march options. "-march=core2 -mfpmath=sse" for the Atom
> showed
> > the error. Settung it to a more conservative "-march=prescott" makes it
> > work. In this case it was a clear overoptimization.
>
> Well, to be more precise, it's been optimization for an incompatible
> platfom ;-)
> The Core2 has a slightly different instruction set from the Pentium
> III, thus, if I were you, I'd let the 'native' compiler choose the
> right platform optimization for you - as long as you don't compile
> cross-platform.
>
Generally terragear is going to be more IO bound that compute bound anyway.
I don't think you buy yourself a whole lot by trying to squeeze a few
instructions savings into your build.
Curt.
--
Curtis Olson:
http://www.atiak.com - http://aem.umn.edu/~uav/
http://www.flightgear.org - http://gallinazo.flightgear.org
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