Date: Mon, 19 Jan 2004 10:33:04 +0200 From: Ruslan Ermilov <ru@freebsd.org> To: Chris Knight <chris@e-easy.com.au> Cc: freebsd-current@freebsd.org Subject: Re: Release Building and /etc/make.conf Message-ID: <20040119083303.GF39956@FreeBSD.org.ua> In-Reply-To: <200401190738.i0J7ccF3020266@postoffice.e-easy.com.au> References: <200401190738.i0J7ccF3020266@postoffice.e-easy.com.au>
next in thread | previous in thread | raw e-mail | index | archive | help
--B0nZA57HJSoPbsHY
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
On Mon, Jan 19, 2004 at 06:23:30PM +1100, Chris Knight wrote:
> Howdy,
>=20
> I'm just doing a release build of 5.2 and have noticed that
> from Stage 4.2 onwards, -mcpu=3Dpentiumpro is added to the cc
> command line.
> The only place I can see this being set is in /etc/make.conf
> which is outside the sandbox.
> I was expecting the release build to be CPU agnostic, but
> this doesn't appear to be the case. Any way of overriding
> this without modifying /etc/make.conf?
>=20
There's a substantional difference between -mcpu and -march:
: -mcpu=3Dcpu type
: Assume the defaults for the machine type CPU TYPE when schedul-
: ing instructions. The choices for CPU TYPE are: i386, i486,
: i586 (pentium), pentium, i686 (pentiumpro), and pentiumpro.
: While picking a specific CPU TYPE will schedule things appropri-
: ately for that particular chip, the compiler will not generate
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
: any code that does not run on the i386 without the -march=3Dcpu
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
: type option being used.
:=20
: -march=3Dcpu type
: Generate instructions for the machine type CPU TYPE. The choic-
: es for CPU TYPE are: i386, i486, pentium, and pentiumpro. Spec-
: ifying -march=3Dcpu type implies -mcpu=3Dcpu type.
Please also see the commit log for bsd.cpu.mk,v 1.13.
Cheers,
--=20
Ruslan Ermilov
FreeBSD committer
ru@FreeBSD.org
--B0nZA57HJSoPbsHY
Content-Type: application/pgp-signature
Content-Disposition: inline
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (FreeBSD)
iD8DBQFAC5Y/Ukv4P6juNwoRAjFNAJ4y/BCcWKXipp4jDOGyhGymMRzkCACePgwZ
9hQ0CnOX1DkwiYh+lxt8Uyc=
=v8wz
-----END PGP SIGNATURE-----
--B0nZA57HJSoPbsHY--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040119083303.GF39956>