[maemo-developers] [maemo-developers] gcc options for smallest size, best speed, etc

[From: Koen Kooi]

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Clemens Eisserer wrote:
> Hi,
> 
> 
>>I'd expect -g -Os to do all appropriate code size optimisations
>>regardless of the architecture.
> 
> Well "-g" is a bit stupid in this scenario, since this means you tell
> gcc to optimize for size but include debugging informations too.
> 
> I would recommend -O2 as the "best" option to use. It does a fine job
> deciding wether a optimization is really worth the extra bloat, which
> is especially important when it comes down to the small i-cache the
> N770's processor has.

- -Os uses the same optimizations as -O2 but takes size into account, so
that should be even better for small caches. From my tests -Os is
sligtly faster as -O2 since you need to load less from jffs2 (less zlib
stuff).

regards,

Koen
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