[Numpy-discussion] Atlas build issues

David david@silveregg.co...
Wed Oct 20 02:41:38 CDT 2010

On 10/20/2010 04:39 PM, David wrote:
> On 10/20/2010 04:23 PM, Gael Varoquaux wrote:
>> I am really sorry to be landing on the mailing list with Atlas build
>> issues. I usually manage be myself to build Atlas, but this time I have
>> been fighting for a couple of days with little success.
>> The reason I need to build Atlas is that our work computers are stuck on
>> Mandriva 2008.0, in which the version of Atlas packaged by the system is
>> not usable.
>> Anyhow, I lost quite a while with Atlas 3.9.26, for which I was never
>> able to build libaries that could be used in a '.so' (seemed that the
>> -fPIC was not working, but really I don't understand what was going on in
>> the maze of makefiles). After that I switched to 3.9;25, which I have
>> already have gotten working on another system (Mandriva 2008, but 32
>> bits). Know everything builds, but I get a missing symbol at the import:
>> from numpy.linalg import lapack_lite
>> ImportError: /volatile/varoquau/dev/numpy/numpy/linalg/lapack_lite.so:
>> undefined symbol: zgesdd_
> The two first things to check in those cases (atlas or not):
> 	- ldd /volatile/varoquau/dev/numpy/numpy/linalg/lapack_lite.so: does it
> load the libraries you think are you loading ?
> 	- nm atlas_libraries | grep zgesdd_ for every library in atlas (I don't
> know how the recent ones work, but this function should normally be in
> libf77blas.so)

Sorry, it should be in lapack, not the f77 blas wrapper,


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