[SciPy-user] making an existing scipy installation use atlas libraries

Robert Kern robert.kern@gmail....
Sun Oct 7 14:29:42 CDT 2007

Lev Givon wrote:
> The scipy installation instructions for Linux relating to atlas
> (http://tinyurl.com/2kuwcy) appear to imply that one can force an existing
> scipy installation that was built against netlib blas and lapack to take
> advantage of subsequently installed atlas libraries by directing the
> library loader to point to the atlas-provided libblas.so and
> liblapack.so libraries rather than their netlib equivalents. Does this
> approach provide inferior performance compared to building numpy/scipy
> directly against atlas (i.e., such that the atlas objects are built
> into the cblas/clapack modules)?

ATLAS has a few other libraries that are needed besides its libblas.so and
liblapack.so. You would essentially have to relink the extension modules, not
just change LD_LIBRARY_PATH.

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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