[Numpy-discussion] Forcing the use of unoptimized blas/lapack even when atlas is present

[David M. Cooke]

On Feb 19, 2007, at 11:04 , Robert Kern wrote:

> David Cournapeau wrote:
>> Hi there,
>>
>>     I am developing a building tool to automatically build the whole
>> numpy/scipy/matplotlib set from sources including dependencies,  
>> and one
>> of the problem I got is to force which blas/lapack version to use  
>> when
>> building numpy and scipy.
>>     I thought that doing a BLAS=blaslib LAPACK=lapacklib python
>> setup.config was enough when build numpy, but numpy still wants to  
>> use
>> atlas. I would like to avoid using site.cfg if possible, as I want to
>> build everything automatically,
>
> Set ATLAS=0, I believe.

Not quite, you need
LAPACK=None BLAS=None

(ATLAS=None is only needed if ATLAS is being looked for specifically,  
i.e., system_info.atlas_info is used instead of  
system_info.lapack_opt_info in the setup.py. AFAIK, that's only used  
when debugging ATLAS installs in scipy).

-- 
|>|\/|<
/------------------------------------------------------------------\
|David M. Cooke              http://arbutus.physics.mcmaster.ca/dmc/
|cookedm@physics.mcmaster.ca