[SciPy-user] Problems with ACML

Ryan May rmay@ou....
Wed Sep 12 13:47:06 CDT 2007

Robert Kern wrote:
> Ryan May wrote:
>> Hi,
>> Does anyone here use the AMD Core Math Libraries (ACML) as their
>> underlying libraries for BLAS/LAPACK/etc. in SciPy?  I have problems
>> with (at least) scipy.linalg.eigvals (Fernando discovered this at SciPy
>> on my laptop).  For instance, the following crashes reliably with ACML,
>> but works fine with ATLAS versions of BLAS/LAPACK:
>>>> >from scipy.linalg import eigvals
>>>> >from numpy.random import rand
>>>>> a = rand(100,100)
>>>>> eigvals(a)
>> Anyone else have this problem?  Is ACML known to be a bad thing to use
>> with SciPy?
> No, but it's not an option that's as thoroughly tested as ATLAS, either. If you
> could supply a gdb backtrace from the crash, that would help locate the problem.

Well, right now this is what I get (having updated scipy):

Python 2.5.1 (r251:54863, Jul 27 2007, 10:40:24)
[GCC 4.1.2 (Gentoo 4.1.2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from scipy.linalg import eigvals
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.5/site-packages/scipy/linalg/__init__.py",
line 8, in <module>
    from basic import *
  File "/usr/lib64/python2.5/site-packages/scipy/linalg/basic.py", line
17, in <module>
    from lapack import get_lapack_funcs
  File "/usr/lib64/python2.5/site-packages/scipy/linalg/lapack.py", line
18, in <module>
    from scipy.linalg import clapack
ImportError: /usr/lib64/python2.5/site-packages/scipy/linalg/clapack.so:
undefined symbol: clapack_sgesv
>>> scipy.__version__

Any ACML users out there have any idea? This is on AMD64 w/
gfortran/int64 edition of ACML 3.6.1.


Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

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