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hans_da
n00b
Joined: 09 Mar 2007
Posts: 64
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 Posted: Mon Sep 17, 2007 3:47 pm Post subject: blas\lapack implementations? |
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First, according to the documentation http://www.gentoo.org/proj/en/science/blas-lapack.xml, one should use virtual/blas, but this ebuild is removed from the current portage system, which I just updated minutes ago. How are these packages concerning blas\lapack organized now?
It seems that there are now two different ways of selecting blas\lapack implementations in Gentoo. One is through eselect, another through blas-config and lapack-config. I've emerged the blas\lapack-atlas gsl and mkl. In eselect I can choose mkl and gsl, while in blas/lapack-config I can only choose atlas. What is the difference of the setting in eselect and blas/lapack-config? |
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jabol
Apprentice
Joined: 05 Oct 2005
Posts: 269
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| Posted: Tue Sep 18, 2007 3:29 pm Post subject: |
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| Not concerning the topic maybe, but it seem to have died anyway. What actually are blas/lapack? |
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floffe
Guru
Joined: 24 Nov 2003
Posts: 414
Location: Linköping, Sweden
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| Posted: Tue Sep 18, 2007 6:47 pm Post subject: |
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| Lapack is a linear algebra package, and I think for example Matlab's matrix functions are adaptions of Lapack algorithms (possible because of the 3-clause BSD-style license). |
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jabol
Apprentice
Joined: 05 Oct 2005
Posts: 269
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| Posted: Wed Sep 19, 2007 8:49 am Post subject: |
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| floffe wrote: | | Lapack is a linear algebra package, and I think for example Matlab's matrix functions are adaptions of Lapack algorithms (possible because of the 3-clause BSD-style license). |
Thanks. Knew it was sth. like that since Scilab has it as dependency here. |
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emerald
Tux's lil' helper
Joined: 31 Jul 2005
Posts: 113
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| Posted: Wed Sep 19, 2007 10:58 pm Post subject: |
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btw, the up and coming gcc-4.3 will have included support for (external) blas routines to speed up vector operations
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