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[Discuss-gnuradio] Newbie problem


From: Mike Markowski
Subject: [Discuss-gnuradio] Newbie problem
Date: Wed, 18 Feb 2015 16:13:04 -0500
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

I was excited to successfully try an rtl-sdr GRC demo/tutorial and decided to start following the gnuradio tutorials to better learn the program. I quickly ran into trouble, so am sure I've done something stupid but can't figure out what! Running through tutorial

  http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GRC

and reaching section 2.2.3, 'Generate' goes fine, but not 'Execute':


Generating: "/home/mm/gnuradio/tutorial_two_1.py"

Executing: "/home/mm/gnuradio/tutorial_two_1.py"

Traceback (most recent call last):
  File "/home/mm/gnuradio/tutorial_two_1.py", line 13, in <module>
    from gnuradio import qtgui
File "/usr/lib/python2.7/site-packages/gnuradio/qtgui/__init__.py", line 34, in <module>
    from qtgui_swig import *
File "/usr/lib/python2.7/site-packages/gnuradio/qtgui/qtgui_swig.py", line 28, in <module>
    _qtgui_swig = swig_import_helper()
File "/usr/lib/python2.7/site-packages/gnuradio/qtgui/qtgui_swig.py", line 24, in swig_import_helper
    _mod = imp.load_module('_qtgui_swig', fp, pathname, description)
ImportError: /usr/lib/libgnuradio-qtgui-3.7.6.1.so.0.0.0: undefined symbol: _ZN7QwtPlot11eventFilterEP7QObjectP6QEvent

>>> Done (return code 1)

The machine I'm on is a gentoo box with gnuradio compiled as follows (notice qt4 is specified):

# emerge -pv gnuradio

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild R ] net-wireless/gnuradio-3.7.6.1:0/3.7.6.1::gentoo USE="alsa analog audio ctrlport digital doc examples fcd filter grc jack oss qt4 sdl utils wavelet wxwidgets -atsc -channels -dtv -fec -log -noaa -pager -performance-counters -portaudio {-test} -trellis -uhd -vocoder -zeromq" PYTHON_TARGETS="python2_7" 0 KiB

Total: 1 package (1 reinstall), Size of downloads: 0 KiB

As I mentioned, all works well with RTL-SDR source, so I assume there is a QT problem of some sort?

Thanks!
Mike Markowski



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