[SciPy-user] clapack and cblas modules are empty

Robert Kern robert.kern at gmail.com
Fri Dec 1 19:20:24 CST 2006


jrpirone wrote:
> Hello,
> 
> I've installed scipy and numpy from Andrew Straw's repository, all other
> libraries are from the standard Ubuntu repositories (6.10).  When I
> execute scipy.test(), the following warnings appear:
> 
> ****************************************************************
> WARNING: clapack module is empty
> -----------
> See scipy/INSTALL.txt for troubleshooting.
> Notes:
> * If atlas library is not found by numpy/distutils/system_info.py,
>   then scipy uses flapack instead of clapack.
> ****************************************************************
> 
> ****************************************************************
> WARNING: cblas module is empty
> -----------
> See scipy/INSTALL.txt for troubleshooting.
> Notes:
> * If atlas library is not found by numpy/distutils/system_info.py,
>   then scipy uses fblas instead of cblas.
> ****************************************************************
> 
> Running the command:
> ldd /usr/lib/python2.4/site-packages/numpy/linalg/lapack_lite.so
> 
> Gives me:
>         linux-gate.so.1 =>  (0xffffe000)
>         liblapack.so.3 => /usr/lib/atlas/sse2/liblapack.so.3
> (0xb7958000)
>         libblas.so.3 => /usr/lib/atlas/sse2/libblas.so.3 (0xb7387000)
>         libg2c.so.0 => /usr/lib/libg2c.so.0 (0xb735f000)
>         libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7339000)
>         libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb732e000)
>         libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb71fa000)
>         /lib/ld-linux.so.2 (0x80000000)
> 
> Is there a problem with the libraries I have installed?  Should I be
> worried about these warnings, or am I just being compulsive?

They're not *necessary* but they are nice to have. It demonstrates that scipy
was not compiled with ATLAS.

-- 
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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