[Numpy-discussion] Help building numpy

Benjamin Root ben.root@ou....
Fri Oct 8 09:06:40 CDT 2010

On Fri, Oct 8, 2010 at 8:47 AM, Ian Goodfellow <goodfellow.ian@gmail.com>wrote:

> Can anyone explain how to get numpy to recognize atlas? I have atlas built
> and installed, and I put what I thought should be sufficient, based on
> numpy's INSTALL.TXT, to make numpy use atlas in my site.cfg then ran python
> setup.py install. The resulting build is incredibly slow. Multiplying a
> 1,000 x 1,000 matrix takes 8 seconds. The default packages take .8 . On a
> computer at work with a similar but slower cpu to mine, it only takes .2, so
> I know I should be able to get a lot more speed out of numpy.
> This is my site.cfg:
> [atlas]
> atlas_libs = lapack, f77blas, cblas, atlas
> library_dirs = /usr/local/atlas/lib
> include_dir = /usr/local/atlas/include
> Thanks in advance,
> Ian
Ian, it would be very helpful if you could post the output from the build of
numpy.  That log can tell us whether it found the libraries or not when

Ben Root
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