[SciPy-user] lapack unresolved symbol question

Karl Young Karl.Young@ucsf....
Tue Oct 16 13:47:55 CDT 2007


 From googling around a bit it looks like I'm having an unresolved 
symbol problem that was apparently typical at one point but also 
apparently solved. But I can't quite pinpoint the fix so I figured I'd 
check re. easy fixes before rebuilding libraries and the like.

The issues seems to be that the symbol clapack_sgesv is missing from 
/usr/lib/python2.4/site-packages/scipy/linalg/clapack.so
- apparently confirmed via nm, i.e.

nm /usr/lib/python2.4/site-packages/scipy/linalg/clapack.so | grep 
clapack_sgesv
               U clapack_sgesv
00012640 d doc_f2py_rout_clapack_sgesv
000094c0 t f2py_rout_clapack_sgesv

In detail:
------------------------------------------------------------------------------------------------------------------------------
In [1]: from scipy.linalg import *

exceptions.ImportError                               Traceback (most 
recent call last)

/home/karl/projects/MCMC/<ipython console>

/usr/lib/python2.4/site-packages/scipy/linalg/__init__.py
      6 from linalg_version import linalg_version as __version__
      7
----> 8 from basic import *
      9 from decomp import *
     10 from matfuncs import *

/usr/lib/python2.4/site-packages/scipy/linalg/basic.py
     15 #from blas import get_blas_funcs
     16 from flinalg import get_flinalg_funcs
---> 17 from lapack import get_lapack_funcs
     18 from numpy import 
asarray,zeros,sum,newaxis,greater_equal,subtract,arange,\
     19      conjugate,ravel,r_,mgrid,take,ones,dot,transpose,sqrt,add,real

/usr/lib/python2.4/site-packages/scipy/linalg/lapack.py
     16
     17 from scipy.linalg import flapack
---> 18 from scipy.linalg import clapack
     19 _use_force_clapack = 1
     20 if hasattr(clapack,'empty_module'):

ImportError: /usr/lib/python2.4/site-packages/scipy/linalg/clapack.so: 
undefined symbol: clapack_sgesv

------------------------------------------------------------------------------------------------------------------------------

My situation:

os version = Fedora Core release 5 (Bordeaux)
python version = Python 2.4.3 (#1, Oct 23 2006, 14:19:47)
scipy version = '0.5.3.dev2950'

Any tips appreciated, thanks,

-- 

Karl Young
Center for Imaging of Neurodegenerative Diseases, UCSF          
VA Medical Center (114M)              Phone:  (415) 221-4810 x3114  lab        
4150 Clement Street                   FAX:    (415) 668-2864
San Francisco, CA 94121               Email:  karl young at ucsf edu


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