[SciPy-User] scipy install: atlas incomplete
Cable, Sam B Civ USAF AFMC AFRL/RVBXI
Sam.Cable at kirtland.af.mil
Fri Jan 18 19:54:49 EST 2013
I am trying to install scipy, and encountering problems. Comparing my
results to the FAQ page, it looks like my ATLAS is incomplete. The page
says:
LAPACK library provided by ATLAS is incomplete
You will notice it when getting import errors like
ImportError: .../flapack.so : undefined symbol: sgesdd_
To be sure that NumPy/SciPy is built against a complete LAPACK, check the
size of the file liblapack.a - it should be about 6MB. The location of
liblapack.a is shown by executing
python numpy/distutils/system_info.py lapack
To fix: follow the instructions in
<http://math-atlas.sourceforge.net/errata.html#completelp> Building a
complete LAPACK library to create a complete liblapack.a. Then copy
liblapack.a to the same location where libatlas.a is installed and retry
with scipy build.
The actual object I am missing is "sgges_". I have tried two solutions.
1) I have followed the ATLAS instructions for making a complete build of
LAPACK, rev. 3.4.2. (BTW, the resulting LAPACK is about 10MB, bigger than
the 6MB in the FAQ.)
2) I have found a pre-compiled binary for LAPACK - rev. unclear -- and just
downloaded it and dropped it in place. (It is close to the 6MB in size.)
I get the same problem regardless.
"nm" shows sgges_ defined in liblapack.a plain as day.
System_info.py finds my lapack just fine in /usr/local/lib.
Is this a critical failure? Is there anything else to do?
BTW, I am running python 2.7 on a 64 bit CentOs 5.x machine and gfortran is
my FORTRAN compiler.
Thanks.
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