John H Palmieri wrote:
On Apr 18, 2:55 pm, William Stein <wst...@gmail.com> wrote:
On Sun, Apr 18, 2010 at 2:50 PM, John H Palmieri <jhpalmier...@gmail.com> wrote:
If I've built atlas once on a particular machine and if it took a long
time (e.g. t2.math, but also on various linux boxes), if I want to
build Sage again from scratch, are there just some files I can copy so
I can just touch spkg/installed/atlas... to skip it the next time?
Yes, just do:
1. touch spkg/installed/atlas??
2. cp the following files to local/lib: libatlas.*
libcblas.* libf77blas* liblapack*
I'm guessing I also need local/include/atlas/* and the files cblas.h
and clapack.h from local/include. Is that right?
It would be great if you could add this to the README.txt for Sage...
If I have the time and if I can figure out a good place to put it,
I'll do it.
--
John
The reasons for the slow build on 't2' (or any machine based on the Sun T1, T2
or T2+ processors) are at
http://trac.sagemath.org/sage_trac/ticket/6705
Basically ATLAS has a set of default tuning parameters for various systems, but
not for the sun4v processor. I've tried to fix this before, but I'm confused
about how to go about it, and a request to the ATLAS support web site never
resolved it for me.
Dave
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