On Sat, 21 Apr 2007 17:02:47 -0400
"Blair Sadewitz" <blair.sadewitz@gmail.com> wrote:

> I rebuilt the whole tree with -mtune=nocona, and I
> it seems like this may be the way to go (instead of, for example,
> -march=nocona) for EMT64 processors.  I have to run some benchmarks,
> but what inspired me to try this was looking at the table in
> override_options() in dist/gcc4/gcc/config/i386.c.
> 
> I also think we should build the kernel with all of the -mno-sse,
> -mno-mmx etc. flags present.

NetBSD uses minimal optimization flags, and IMHO it's ok.

If you want specific flags for your build, use CPUFLAGS or CFLAGS in
/etc/mk.conf.

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