[Numpy-discussion] Unable to building numpy with openblas using bento or distutils

Skipper Seabold jsseabold@gmail....
Sat Mar 23 19:44:24 CDT 2013


On Sat, Mar 23, 2013 at 7:26 PM, Ake Sandgren <ake.sandgren@hpc2n.umu.se> wrote:
> On Sat, 2013-03-23 at 14:19 -0400, Skipper Seabold wrote:
>> Some help on this would be greatly appreciated. It's been recommended
>> to use OpenBlas over ATLAS, so I've been trying to build numpy with
>> openblas and have run into a few problems.
>
>>
>> To truly support OpenBlas, is it maybe necessary to make some
>> additions to numpy/distutils/system_info.py?
>
> Here is how.
>
> https://github.com/akesandgren/numpy/commit/363339dd3a9826f3e3e7dc4248c258d3c4dfcd7c
>


Thanks that works well for numpy. Test pass. I hope that makes it into
a pull request. My site.cfg looks like this. I don't know about the
lapack_opt section. It doesn't seem to work.

[DEFAULT]
library_dirs = /home/skipper/.local/lib
include_dirs = /home/skipper/.local/include

[openblas]
libraries = openblas

[lapack_opt]
libraries = openblas

Do you have any idea how to get scipy working too. I have a similar
site.cfg, but it does not find lapack, which is rolled into
libopenblas from what I understand. I can do

export LAPACK=~/.local/lib/libopenblas.a
python setup.py build &> build.log
sudo -E python setup.py install

There are no obvious failures in the build.log, but scipy is still
broken because it needs lapack from numpy I guess.

>>> import numpy as np
>>> np.show_config()
lapack_info:
  NOT AVAILABLE
atlas_threads_info:
  NOT AVAILABLE
blas_opt_info:
    libraries = ['openblas', 'openblas']
    library_dirs = ['/home/skipper/.local/lib']
    language = f77
lapack_src_info:
  NOT AVAILABLE
openblas_info:
    libraries = ['openblas', 'openblas']
    library_dirs = ['/home/skipper/.local/lib']
    language = f77
lapack_opt_info:
  NOT AVAILABLE
atlas_info:
  NOT AVAILABLE
lapack_mkl_info:
  NOT AVAILABLE
blas_mkl_info:
  NOT AVAILABLE
mkl_info:
  NOT AVAILABLE
>>> from scipy import stats
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/scipy/stats/__init__.py",
line 320, in <module>
    from .stats import *
  File "/usr/local/lib/python2.7/dist-packages/scipy/stats/stats.py",
line 242, in <module>
    import scipy.linalg as linalg
  File "/usr/local/lib/python2.7/dist-packages/scipy/linalg/__init__.py",
line 147, in <module>
    from .misc import *
  File "/usr/local/lib/python2.7/dist-packages/scipy/linalg/misc.py",
line 5, in <module>
    from . import blas
  File "/usr/local/lib/python2.7/dist-packages/scipy/linalg/blas.py",
line 113, in <module>
    from scipy.linalg import _fblas
ImportError: libopenblas.so.0: cannot open shared object file: No such
file or directory

Skipper


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