numpy-discussion

[Numpy-discussion] libblas error with NumPy 1.0rc2 on Python 2.5 and Red Hat 9

[Steven H. R. <st...@sh...>]

Is there a specific libblas required by NumPy?  I just installed 1.0rc2 
and get this error.

Python 2.5 (r25:51908, Sep 21 2006, 17:18:24)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import numpy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.5/site-packages/numpy/__init__.py", line 
40, in <module>
    import linalg
  File 
"/usr/local/lib/python2.5/site-packages/numpy/linalg/__init__.py", line 
4, in <module>
    from linalg import *
  File "/usr/local/lib/python2.5/site-packages/numpy/linalg/linalg.py", 
line 25, in <module>
    from numpy.linalg import lapack_lite
ImportError: /usr/lib/libblas.so.3: undefined symbol: e_wsfe

Regards,
Steve

-- 
Steven H. Rogers, Ph.D., st...@sh...
Weblog: http://shrogers.com/weblog
"He who refuses to do arithmetic is doomed to talk nonsense."
-- John McCarthy
    

Re: [Numpy-discussion] libblas error with NumPy 1.0rc2 on Python 2.5 and Red Hat 9

[Karol L. <kar...@kn...>]

On Wednesday 11 of October 2006 05:38, Steven H. Rogers wrote:
> Is there a specific libblas required by NumPy?  I just installed 1.0rc2
> and get this error.
>
> Python 2.5 (r25:51908, Sep 21 2006, 17:18:24)
> [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>
>  >>> import numpy
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/local/lib/python2.5/site-packages/numpy/__init__.py", line
> 40, in <module>
>     import linalg
>   File
> "/usr/local/lib/python2.5/site-packages/numpy/linalg/__init__.py", line
> 4, in <module>
>     from linalg import *
>   File "/usr/local/lib/python2.5/site-packages/numpy/linalg/linalg.py",
> line 25, in <module>
>     from numpy.linalg import lapack_lite
> ImportError: /usr/lib/libblas.so.3: undefined symbol: e_wsfe
>
> Regards,
> Steve

I've seen this a couple of times - e_wsfe is a Fortran I/O symbol from the gcc 
system and should be made available by libg2c. My guess if that you have 
inconsistencies in the compilers used, i .e. a different one was used for 
building the blas libraries by RH and by you for numpy.

Try adding g2c to the list of libraries. There's a comment about it in the 
scipy FAQ:
http://www.scipy.org/FAQ#head-26562f0a9e046b53eae17de300fc06408f9c91a8

Karol

-- 
written by Karol Langner
Wed Oct 11 09:35:15 CEST 2006