There is also a "-march=nocona". I tried building a kernel for an EMT64 
machine with "-march=nocona" and it would not boot.

On Sunday 08 April 2007 20:22, you wrote:
> There is an [undocumented] 'x86-64' architecture type in gcc 4.1 which
> _apparently_ generates instructions common to AMD64 and EMT64.  I'm
> looking into this further to make sure that this is indeed the case.
> If it is, then it is my position that:
>
> -- we should patch the gcc(1) manual page to reflect this
>
> -- NetBSD/amd64 builds should use this by default.
>
> Comments?
>
> Regards,
>
> --Blair

-- 
John R. Shannon, CISSP
Chief Scientist
DSCI, Information Assurance Division
jshannon@dsci-usa.com
john.r.shannon@us.army.mil
shannonjr@NetBSD.org
(208)522-4506