CODEWITHSUNDEEP
pythonnumpyatlastheano
iBM
iBM

Reputation: 185

Running Python code for theano: /usr/bin/ld: cannot find -latlas

I am trying to run theano on ubuntu which requires libatlas.

I have already installed libatlas but I can find it in /usr/lib/atlas-base

I have also copied all of the files to a new folder called /atlas:

cp -a /usr/lib/atlas-base/* /usr/lib/atlas

But still, when I run the python code I see:

/usr/bin/ld: cannot find -latlas
/usr/bin/ld: cannot find -l477blas
/usr/bin/ld: cannot find -lcblas

I also tried adding to environment variables but didn't work:

set LIBPATH = [BUILD_LIB_DIR, /usr/lib/atlas]

Also I tried adding the path path to ld file:

/usr/lib/atlas

or

/usr/lib/atlas-base

None of them worked and I still see the error running the Python code.

Upvotes: 0

Views: 2146

Answers (1)

nouiz
nouiz

Reputation: 5071

To change how Theano link to BLAS, you need to use Theano flags[1]. They can be set with an environment variable THEANO_FLAGS or with a configuration file.

How did you told Theano to use atlas? If you just installed the atlas packages, it won't work. You need to install the libatlas-dev pacakge as per this Theano installation instruction for Ubuntu[2]

A last point, we don't recommand atlas, especially for Ubuntu. OpenBLAS is packaged for Unbuntu and is faster. See [2] for detail on how to installed them. You will need to remove atlas before installing openblas, otherwise, there will be conflict.

[1]http://www.deeplearning.net/software/theano/library/config.html#envvar-THEANO_FLAGS [2]http://www.deeplearning.net/software/theano/install_ubuntu.html#install-ubuntu

Upvotes: 0

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