amd64 optimized gcc?

Kris Kennaway kris at
Wed May 25 15:17:24 PDT 2005

On Wed, May 25, 2005 at 07:51:04PM +0200, K?vesd?n G?bor wrote:
> Hello,
> As for the optimization, I'm very interested how fast can be an actual 
> optimized system. The stock release doesn't optimizes too much, afaik it 
> uses -O. I have been experimenting for a while with building the whole 
> system with my custom cflags, and yesterday I succeeded. I managed to 
> build the whole system with
> CFLAGS=-s -Os -march=athlon64
> COPTFLAGS=-s -Os -march=athlon64
> I might have used -O2 instead of -Os but not -O3 which made a 
> compilation error.

This might make you feel good, but unless you're running a CPU-bound
workload you're unlikely to be able to measure any difference.

> The -s is for srtipping the binaries and libs, because this is intended 
> to be used on a production system, where we use stable software 
> releases, thus we don't need debug symbols

Binaries are already stripped as they're installed.

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