How to use numpy with OpenBLAS instead of Atlas in Ubuntu?

Posted by pierotiste on Stack Overflow See other posts from Stack Overflow or by pierotiste
Published on 2012-09-03T13:44:17Z Indexed on 2012/09/03 15:38 UTC
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ubuntu

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numpy

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installation

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blas

I have looked for an easy way to install/compile Numpy with OpenBLAS but didn't find an easy answer. All the documentation I have seen takes too much knowledge as granted for someone like me who is not used to compile software. There are two packages in Ubuntu related to OpenBLAS : libopenblas-base and libopenblas-dev. Once they are installed, what should I do to install Numpy again with them? Thanks!

Note that when these OpenBLAS packages are installed, Numpy doesn't work anymore: it can't be imported: ImportError: /usr/lib/liblapack.so.3gf: undefined symbol: ATL_chemv.

This was noticed here already.

Answer to the question: Run sudo update-alternatives --all and set liblapack.so.3gf to /usr/lib/lapack/liblapack.so.3gf

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