Re: [Discuss-gnuradio] Newbie problem

[Rick Farina]

Mike,

I am the maintainer of Gnuradio in gentoo.  Please open a gentoo bug at
https://bugs.gentoo.org with "emerge --info" as well as the full
build.log for gnuradio (you will probably need to xz compress it)
attached to the bug.  We can help you fix the problem and get it fixed
for all users.  For what it's worth, we saw a very similar issue several
version ago and the problem turned out to be very obvious in the full
build log.  Likely there are some improper paths for QT getting
autodetected.

Thanks,
Zero_Chaos

On 02/18/15 16:13, 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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