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To: gentoo-science@g.o
From: Peter Bienstman <pbienst@g.o>
Subject: Re: lapack transition
Date: Sun, 21 Aug 2005 16:56:30 +0200
On Sunday 21 August 2005 16:33, Darren Dale wrote:
> On Sunday 21 August 2005 10:25 am, Peter Bienstman wrote:
> > On Sunday 21 August 2005 15:22, Darren Dale wrote:
> > > I use numeric and scipy, and have been trying for a long time to
> > > improve the ebuilds to use blas/lapack/atlas. I submitted an ebuild for
> > > numeric six months ago (http://bugs.gentoo.org/show_bug.cgi?id=81520),
> > > but it has languished in buzilla because it is not clear how to deal
> > > with ATLAS (my atlas USE flag was rejected). How should ATLAS
> > > dependencies be handled in the new infrastructure?
> >
> > In theory it's as simple as depending on virtual/blas and virtual/lapack.
> > The user can then switch between different lapack and blas
> > implementations at runtime with blas-config and lapack-config.
>
> It is not that simple. If numeric and scipy are to make use of atlas, atlas
> has to be in their external library list at compile time. If atlas is in
> the list, but not installed on the system, compilation will fail.

That's why I said 'in theory' ;-)

I'm currently working on a patch which just ignores any explicit atlas stuff 
at build time of SciPy. The idea is to build a library which simply links 
to /usr/lib/liblapack.so. SciPy doesn't need to know this is a symlink 
to /usr/lib/lapack/atlas/liblapack.so or any other implementation.

Peter
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Replies:
Re: lapack transition
-- Darren Dale
References:
lapack transition
-- Peter Bienstman
Re: lapack transition
-- Peter Bienstman
Re: lapack transition
-- Darren Dale
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Updated Jun 17, 2009

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