Re: [Discuss-gnuradio] Newbie problem

[Murray Thomson]

Hey Mike,

If you suspect that you have problems with libraries, maybe you want to run the install script with the prereqs option to install all the dependencies.

wget http://www.sbrac.org/files/build-gnuradio && chmod a+x ./build-gnuradio && ./build-gnuradio prereqs

Thanks,
Murray

On 18 February 2015 at 21:28, Mike Markowski <address@hidden> wrote:

Just a followup to my own note.  I did

  ldd /usr/lib/libgnuradio-qtgui-3.7.6.1.so.0.0.0

and no library comes up as missing.

Thanks,
Mike Markowski

On 02/18/2015 04:13 PM, Mike Markowski wrote:

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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