Problems installing gmp
tege at swox.com
Mon Jul 24 19:33:16 CEST 2006
Herve Pages <hpages at fhcrc.org> writes:
Yeah I know... and I'd love to know how to get ld to link the
ultrasparc3-sun-solaris2.9 build by the way!
It works for me. :-}
> A 32-bit build runs at abuot 1/3
> of the speed of a 64-bit build.
Not on UltraSPARC, according to these charts:
It looks more like the 32-bit build runs at about 60% to 70%
of the speed of a 64-bit build, which is better than having no GMP
at all (and consequently no Fortran front-end for GCC 4.1.1).
Granted, ultrasparc is special, as explained at that page. But you'd
find that the used fallback build is more like 20 times slower than a
64-build, at least on GMPbench, and that can be avoided.
Here are some GMPbench 0.1 scores on a 900 MHz UltraSPARC3 system:
--host=sparcv9-sun-solaris2.9 ABI=32 462
The fallback build was sparc-X-Y IIRC, but the proper fallback build
should be the ABI=32 one (letting the --host parameter be determined
automatically is usually best).
Suggested read: http://www.swox.com/gmp/manual/ABI-and-ISA.html
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