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[Discuss-gnuradio] undefined symbol: _ZNK7QwtPlot5printEP8QPainterRK5QRe


From: John Murphy
Subject: [Discuss-gnuradio] undefined symbol: _ZNK7QwtPlot5printEP8QPainterRK5QRectRK18QwtPlotPrintFilter
Date: Fri, 12 Jun 2015 07:58:26 -0400

Hello,

New machine with new Kubuntu 15 install, new build-gnuradio install on that system.

Had some install issues with a prereq lib that required a force-overwrite to a deb archive. But seemed to progress normally after that was fixed. Also had a warning regarding a missing libzmqt(?) dev package which seems to be something build-gnuradio does under (k)ubuntu 15. But everything built, and afterwards I was also able to build and install my OOT stuff without anything unusual.

But when I attempt to actually run any of my flowgraphs in GRC I get the following crash (back to GRC) message:

Traceback (most recent call last):
  File "/home/jmurphy/MyGNUradioFiles/multi_file_playback.py", line 23, in <module>
    from gnuradio import qtgui
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/qtgui/__init__.py", line 35, in <module>
    from qtgui_swig import *
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/qtgui/qtgui_swig.py", line 28, in <module>
    _qtgui_swig = swig_import_helper()
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/qtgui/qtgui_swig.py", line 24, in swig_import_helper
    _mod = imp.load_module('_qtgui_swig', fp, pathname, description)
ImportError: /usr/local/lib/libgnuradio-qtgui-3.7.7.1.so.0.0.0: undefined symbol: _ZNK7QwtPlot5printEP8QPainterRK5QRectRK18QwtPlotPrintFilter

Any idea what I might need to do in order to get this working? Steps to troubleshoot further?

Thanks,
John

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