Re: [2.6 patch] add a config option for -Os compilation

[Alan Cox]

On Sul, 2003-09-14 at 14:53, Wade wrote:
> Adrian Bunk wrote:
> > The patch below adds a config option OPTIMIZE_FOR_SIZE for telling gcc 
> > to use -Os instead of -O2. Besides this, it removes constructs on 
> > architectures that had a -Os hardcoded in their Makefiles.
> 
> Someone told me that -Os is actually faster than -O2 for Athlons, is 
> that true?

On gcc 2.95 -Os was faster for most stuff. I would intuitively expect
the best result to be a mix varied by function but I don't think gcc has
the support to do that.

I've also not benched gcc 3.2 -Os v -O2 at real workloads - thats a 
nice little project for someone.

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