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[Discuss-gnuradio] gr-fosphor. builds OK, throws runtime error

From: Tom McDermott
Subject: [Discuss-gnuradio] gr-fosphor. builds OK, throws runtime error
Date: Tue, 26 Aug 2014 21:35:25 -0700

Ubuntu 14.04.
Have updated to gnuradio 3.7.5git-194-g76a271ac, seems to run fine.

I rebuilt / reinstalled gr-fosphor. No problems with the build. The location of Nvidia's OpenCL library
changed from Ubuntu 13.10 to 14.04.  The cmake command was:

cmake ../ -DOPENCL_LIBRARY=/usr/lib/x86_64-linux-gnu/libnvidia-opencl.so.1

cmake and make complete successfully.

The QT fosphor block shows up in Gnuradio Companion OK.  When trying to run, I get the following error:

  from gnuradio import fosphor
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/fosphor/__init__.py", line 45, in <module>
    from fosphor_swig import *
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/fosphor/fosphor_swig.py", line 28, in <module>
    _fosphor_swig = swig_import_helper()
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/fosphor/fosphor_swig.py", line 24, in swig_import_helper
    _mod = imp.load_module('_fosphor_swig', fp, pathname, description)
ImportError: /usr/local/lib/libgnuradio-fosphor-3.7.0git.so.0.0.0: undefined symbol: clBuildProgram

The version of gr-fosphor (which git tells me is the latest) is:
Revision: 9aea19a
Author: Sylvain Munaut
Date: 2014-07-24 22:34:07
fosphor: Allow operation without CL/GL sharing extension

Any advice?

-- Tom, N5EG

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