[XviD-devel] Linux (gcc) optimizations
Cameron Brunner
gamr at inetsalestech.com
Thu Dec 11 04:16:12 CET 2003
On Wed, 10 Dec 2003 23:27:09 +0100, Edouard Gomez <ed.gomez at free.fr> wrote:
> Christoph Lampert (chl at math.uni-bonn.de) wrote:
>> With "-fcgse" compiling failed on all SuSE 9. I myself updated an older
>> version with a newer gcc and had the same problems now.
>
> Strange, Debian uses a "latest gcc release" + CVS updates (to fix
> regressions only afaik) and it does compile everything like a charm.
>
> Anyway, go ahead, change what is needed (in the first lines of
> configure.in, you'll find the aggregated default compile
> options). According to latest gcc benchmarking (the one with a DNA
> based benchmarking procedure) -03 gave best results for most tests. We
> should just take care of additionnal flags which can cause trouble
> combined with -03.
>
> Someone feeling the courage to run the DNA banchmrking ? ;-)
>
-O3 is evil on a gcc 3.2.2 from freebsd, be warned, i get core dumps if i
use O3 on 3.2.2 but on 3.3.3 -O3 is fine. Keep in mind that most people's
compilers are antique.
Cameron
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