Re: SUMMARY: pentium optimized debian discussion
Matthias Klose wrote:
> Joey Hess writes:
> > other
> > - egcc does use pentium ("-mpentium") to identify this optimization, not
> > "-m586".
>
> -mpentium for egcs is deprecated; there are two new options
> -mcpu=pentium and -march=pentium
Yes, I know, pentium-builder uses them. Anyhow, they still use "pentium",
which was my point.
> What about increasing the optimization level from O2 to O3?
> inlining and loop unrolling makes the code faster, but larger.
According to the man page, -O3 just enables -finline-functions, I don't see
any mention of loop unrolling. Anyhow, I know that higher -O optimization
levels have been known to cause problems. And policy says:
It is up to the package maintainer to decide what compilation options
are best for the package. Certain binaries (such as
computationally-intensive programs) may function better with certain
flags (-O3', for example); feel free to use them. Please use good
judgment here. Don't use flags for the sake of it; only use them if
there is good reason to do so.
--
see shy jo
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