Compiler Options

Joerg Pernfuss elessar at
Fri Nov 10 22:19:26 UTC 2006

On Fri, 10 Nov 2006 11:34:22 -0800
"Jason C. Wells" <jcw at> wrote:

> I have set CPUTYPE=p3 in make.conf.  When I compile my kernel I see 
> -march=pentium3 as I expect.  I also see -mno-mmx and -mno-sse are
> set which I do not expect given that -march=pentium3 is used.  I
> presume that I want MMX and SSE since my processor supports it.  What
> options do I set and where do I set them to get a kernel properly
> tuned for pentium3?

The FreeBSD kernel does not use MMX and SSE registers. That is why
they are disabled, regardless of the chosen CPUTYPE.

| /"\   ASCII ribbon   |  GnuPG Key ID | e86d b753 3deb e749 6c3a |
| \ / campaign against |    0xbbcaad24 | 5706 1f7d 6cfd bbca ad24 |
|  X    HTML in email  |        .the next sentence is true.       |
| / \     and news     |     .the previous sentence was a lie.    |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url :

More information about the freebsd-stable mailing list