[SciPy-user] 'from scipy import linalg' fails

David Cournapeau david@ar.media.kyoto-u.ac...
Sat May 9 04:04:49 CDT 2009

Klubok, Igor wrote:
> Hi David,
> I am installing scipy for quant researchers and do need the most optimized version of blas there is. Therefore, I chose ATLAS.
> ATLAS offers an example of ATLAS/lapack combination on Red Hat. 
> I follow every step of the way exactly as it's stated in the atlas_install.pdf document. 
> I still run into the issue of "undefined symbol: srotmg_"

First, you should check that you built everything with g77 and not
gfortran (atlas, scipy, lapack, everything should use g77 or gfortran,
but no mix). Then, you should check that the symbol srotmg_ is indeed in
your ATLAS library (the libf77blas.so file, usually). Then, you should
check whether the atlas library is indeed linked to your scipy
installation (using ldd on scipy/linalg/*.so).

You could also give us the build log of scipy,



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