Import error with numpy.dot

[nth29]

After compiling the following example test_pythran.py
"""
import numpy as np
#pythran export mytest(float[],float[:,:])
def mytest(a,b):
res = np.dot(a,b)
return res
"""
with command :

pythran test_pythran.py

then, import test_pythran in python fails with the following error

"""

import test_pythran
Traceback (most recent call last):
File "", line 1, in
ImportError: ./test_pythran.so: undefined symbol: _Z11cblas_dgemv11CBLAS_ORDER15CBLAS_TRANSPOSEiidPKdiS2_idPdi
"""
Pythran version : 0.9.3
Python version : 2.7.16
Operating System: Debian GNU/Linux 10 (buster)
Kernel: Linux 4.19.0-5-amd64
Architecture: x86-64

[nth29]

numpy version : 1.16.2

[serge-sans-paille]

Do you have libatlas-base-dev installed?

[serge-sans-paille]

(you should use python3 btw, python2 support ends at then end of 2019)

[nth29]

Yes libatlas-base-dev is installed (version 3.10.3-8).
(Sure we should go to python3 but this is some work to convert a big python2 project to python3 and test that all is ok...)

[serge-sans-paille]

Can you try to install openblas and to add this to your '~/.pythranrc` :

[compiler]
blas=openblas

[nth29]

Yes, this solves the issue.

[serge-sans-paille]

Good to knwo. I'll still have a loo to the atlas issue later on, thus not closing the issue.