[SciPy-dev] Re: [Numpy-discussion] QR algorithms in Python

[James G Analytis]

Dear Pearu,
>
> The problem seems to be with the lapack installation. Did you follow the
> instructions in scipy/INSTALL.txt file, especially the ones related to
> ATLAS?
I followed the instructions on 
http://www.scipy.org/Members/fperez/PerezCVSBuild.htm
But I noted the problems described in scipy/INSTALL.txt and thought I had 
installed ATLAS correctly.

> In order to give more hints, could you send the
> output of the following command:
>
>  python scipy_distutils/system_info.py
>
[analytis at toomey analytis]$ python2 
/home/analytis/tmp/scipy/scipy_distutils/system_info.py
atlas_info:
  FOUND:
    libraries = ['lapack', 'f77blas', 'cblas', 'atlas']
    library_dirs = ['/usr/local/lib']

blas_info:
  FOUND:
    libraries = ['blas']
    library_dirs = ['/usr/lib']

blas_src_info:
  NOT AVAILABLE

fftw_info:
  FOUND:
    libraries = ['fftw', 'rfftw', 'fftw_threads', 'rfftw_threads', 'sfftw', 
'srfftw', 'sfftw_threads', 'srfftw_threads']
    library_dirs = ['/usr/local/lib']
    define_macros = [('SCIPY_FFTW_H', 1), ('SCIPY_SFFTW_H', 1)]
    include_dirs = ['/usr/local/include']

lapack_info:
  FOUND:
    libraries = ['lapack']
    library_dirs = ['/usr/local/lib']

lapack_src_info:
  NOT AVAILABLE

x11_info:
  FOUND:
    libraries = ['X11']
    library_dirs = ['/usr/X11R6/lib']
    include_dirs = ['/usr/X11R6/include']

So everything is there except blas_src_info and lapack_src_info.

> and also the location of your ATLAS (or BLAS and LAPACK) libraries?

I've got two copies of liblapack.a - one that came with ATLAS and one that 
came with RedHat 7.3. The ATLAS liblapack is in /usr/local/lib/ and the 
system one is in /usr/lib/. I will remove the RedHat ones and recompile 
ATLAS. I couldn't initially remove the RedHat ones because Octave required 
them. But I've since discovered that Octave can be removed. 
Hopefully this should work (?)
I'm using standard install of RedHat 7.3 with gcc version 2.96, but this can 
be changed if you recommend it.

Cheers,
James