Date: Sat, 16 Sep 2000 22:23:53 -0700 (PDT) From: Kris Kennaway <kris@FreeBSD.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: FreeBSD Current <freebsd-current@FreeBSD.org> Subject: Re: upgrade libgmp? Message-ID: <Pine.BSF.4.21.0009162221180.20280-100000@freefall.freebsd.org> In-Reply-To: <200009170506.WAA07848@troutmask.apl.washington.edu>
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On Sat, 16 Sep 2000, Steve Kargl wrote:
> I need to review the gmp documents again, but I not sure
> the preference order is much of an issue. By default,
> CPU_TYPE="generic" would build the C code, which should work
> on all architectures supported by FreeBSD. If a user explicitly
> sets CPU_TYPE in /etc/make.conf, then the ordering would be
> CPU_TYPE then generic. There is not gray area. For example,
> I have an athlon processor, so libgmp.a would have a preferred
> order of athlon, generic.
It's not just for libgmp, but for other parts of the system too (like
openssl).
For example, what happens if you have a pentium pro, but there are no
ppro optimisations in a particular program - but there are pentium
optimisations. Obviously you would want those as a fallback.
Kris
--
In God we Trust -- all others must submit an X.509 certificate.
-- Charles Forsythe <forsythe@alum.mit.edu>
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