Re: [PyCUDA] Tests fail with ImportError _driver.so: undefined symbol

[Kambiz Tavabi]

I am at a complete loss. I did a fresh reinstall of the OS (ubuntu 16.04)
and the first thing I did was:


   - apt update; sudo apt upgrade
   - apt-get install nvidia-cuda-toolkit nvidia-361 nvidia-modprobe
   - Build install pycuda as before; nosetests failed with same error
   - pip uninstall pycuda
   - pip install pycuda
   - python -c "from pycuda import gpuarray, driver" > Same import error

I wonder if I am hitting this issue
 on the installation?

On Fri, Oct 28, 2016 at 2:41 PM Andreas Kloeckner 
wrote:

> Please keep the list cc'd.
>
> Kambiz Tavabi  writes:
> > It literally said
> _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev
> > which in retrospect is partly gibberish.
>
> It's not. :) For example, c++filt will decode it to
>
> std::__cxx11::basic_string std::allocator >::~basic_string()
>
> It's arguable whether that's gibberish--that depends on how much you
> like C++.
>
> At any rate, it tells me that different parts of your build process link
> against two different versions of the C++ standard library, which could
> very well be the result of the issue you describe regarding two versions
> of the toolkit being installed, or being built with two different
> compilers at least. (clang vs gcc maybe)
>
> > Sorry about that. Also, it was
> > just made clear to me that both Nvidia's toolkit package (i.e., CUDA 8)
> and
> > Ubuntu's Nvidia-cuda-toolkit package were installed, so this could all be
> > do to conflicts caused by faulty installations.
>
> Andreas
>
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Re: [PyCUDA] Tests fail with ImportError _driver.so: undefined symbol

[Andreas Kloeckner]

Kambiz Tavabi  writes:

> Hi
>
> I am Trying to get packages including pycuda-2016.1.2 working in a python
> 2.7 (Anaconda) environment. I am Running Ubuntu 1604 with working nvidia
> driver and CUDA 8.
> I installed pycuda via
>
>  $ git clone http://git.tiker.net/trees/pycuda.git
>  $ cd pycuda
>  $ ./configure.py --cuda-enable-gl
>  $ git submodule update --init
>  $ make -j 4
>  $ python setup.py install
>
> nosetests fail with ImportErrors referencing
> ...anaconda2/lib/python2.7/site-packages/pycuda-2016.1.2-py2.7-linux-x86_64.egg/pycuda/_driver.so:
> undefined symbol: gibbirish

Did it literally say 'gibbirish'? Because that symbol is the one thing
that might help me figure out what happened.

Andreas

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