[SciPy-dev] Re: [Numpy-discussion] QR algorithms in Python

James G Analytis james.analytis at physics.ox.ac.uk
Wed Aug 14 04:08:56 CDT 2002

Dear Pearu,
Thanks! Scipy seems to be working fine, but I haven't tried anything too large 
yet. A few things to note though:
Lapack installed with a few testing errors. However the libraries are all 
there and about 6MB so I'm not too concerned.
I had to manually copy lipapack.a from the updated ATLAS folder to the 
appropriate path /usr/local/lib/.

I'm pretty happy with what I've seen so far. Thanks for your help!

On Tuesday 13 Aug 2002 6:41 pm, you wrote:
> On Tue, 13 Aug 2002, James G Analytis wrote:
> > Dear Pearu,
> >
> > > The problem seems to be with the lapack installation. Did you follow
> > > the instructions in scipy/INSTALL.txt file, especially the ones related
> > > to ATLAS?
> >
> > I followed the instructions on
> > http://www.scipy.org/Members/fperez/PerezCVSBuild.htm
> > But I noted the problems described in scipy/INSTALL.txt and thought I had
> > installed ATLAS correctly.
> Ok, now I see where is the problem, I think. Try
>   ls -l /usr/local/lib/liblapack.a
> The size of this file should be aroung 6MB. If it is much less than that
> then you have incomplete lapack. To get a complete one, follow these
> instructions
>   http://math-atlas.sourceforge.net/errata.html#completelp
> Fernando, can you add the remark above also to
>   http://www.scipy.org/Members/fperez/PerezCVSBuild.htm
> ? Also, the manual linking part in the fftw section is
> unneccasary: system_info.py should be able to handle it now.
> Finally, can you make also a link to INSTALL.txt file? This file should be
> the most up-to-date document about building SciPy.
> > > and also the location of your ATLAS (or BLAS and LAPACK) libraries?
> >
> > I've got two copies of liblapack.a - one that came with ATLAS and one
> > that came with RedHat 7.3. The ATLAS liblapack is in /usr/local/lib/ and
> > the system one is in /usr/lib/. I will remove the RedHat ones and
> > recompile ATLAS. I couldn't initially remove the RedHat ones because
> > Octave required them. But I've since discovered that Octave can be
> > removed.
> > Hopefully this should work (?)
> > I'm using standard install of RedHat 7.3 with gcc version 2.96, but this
> > can be changed if you recommend it.
> Let's first try to get scipy working without too much changing the system.
> According to the system_info.py output, nothing needs to be removed from
> your RedHat installation, I think.
> Pearu

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