Re: [Discuss-gnuradio] Help with building a VHF-UHF SDR application on Debian Jessie (using Gnuradio 3.7.10)

[Adrian Musceac]

Hi Maitland,

Thanks for the detailed reply! I will adjust my include paths accordingly. On 
my system, it seems that libqwt-dev cannot be installed in parallel with 
libqwt5-qt4-dev. Nevertheless, it is not an issue for my build, since the libs 
coexist and linking is correct. 
It is only a header issue. Thanks for clearing that up.

Cheers,
Adrian

On 19 June 2017 23:19:37 GMT+01:00, "A. Maitland Bottoms" <address@hidden> 
wrote:
>Adrian Musceac <address@hidden> writes:
>
>> Hi fellow Debian hams and Gnuradio experts,
>>
>> I am currently trying to build a SDR experimental application based
>on
>> Gnuradio for digital voice and data communications in the amateur
>radio
>> VHF-UHF bands [1][2]. I am using Gnuradio 3.7.10 on Debian GNU/Linux
>from
>> jessie-backports. I ran into some problems which I will describe
>below and
>> which may be solved with your kind help.
>>
>> 1. Trying to build gnuradio-qtgui support in, I encountered these
>errors:
>> g++ -c -pipe -O2 -D_REENTRANT -Wall -W -DQT_WEBKIT -DQT_NO_DEBUG
>> -DQT_SQL_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED
>> -I/usr/share/qt4/mkspecs/linux-g++ -I../../qradiolink_mobile
>> -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtNetwork
>> -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtSql -I/usr/include/qt4
>-I.
>> -I. -I../../qradiolink_mobile -I. -o dtmfcommand.o ../dtmfcommand.cpp
>> In file included from /usr/include/gnuradio/qtgui/number_sink.h:32:0,
>>                  from ../gr/gr_demod_bpsk_sdr.h:27,
>>                  from ../gr/gr_modem.h:38,
>>                  from ../radioop.h:39,
>>                  from ../main.cpp:41:
>> /usr/include/gnuradio/qtgui/qtgui_types.h:26:27: fatal error:
>> qwt_color_map.h: No such file or directory
>>  #include <qwt_color_map.h>
>>                            ^
>> compilation terminated.
>>
>> It seems as if the relevant header from gnuradio references the wrong
>path
>> of QWT. I can make it build by editing the headers to provide the QWT
>> directory:
>> #include <qwt/qwt_color_map.h>
>> #include <qwt/qwt_scale_draw.h>
>
>In Debian, /usr/include/qwt-qt4/qwt_color_map.h is in libqwt5-qt4-dev
>and /usr/include/qwt/qwt_color_map.h is in libqwt-dev.
>
>The Debian gnuradio packages are built with libqwt5-qt4-dev.
>
>So, either add some cmake logic to get the include path to point
>to the libqwt5-qt4-dev location (/usr/include/qwt-qt4/) - or edit to
>end
>up with
>#include <qwt-qt4/qwt_color_map.h>
>#include <qwt-qt4/qwt_scale_draw.h>
>
>and hopefully that will work better.
>>
>> It may be that this is relevant only to Debian packages from
>> Jessie-backports, or it may be a larger issue.
>>
>> 2. When trying to build the application using QT 5.3 as provided by
>Debian,
>> it links fine, but the application segfaults when running. The build
>works
>> fine with QT 4.8, which makes me think that gnuradio-qtgui in Debian
>does
>> not support QT5. Would be great to clear this. I can provide
>backtraces if
>> required.
>
>When last I thought about this, I was going to wait until stretch and
>gnuradio 3.8 before building with qt5. I am not sure how wise a
>decision
>that is.
>
>>
>> With thanks for the wonderful packages your communities are
>providing,
>> Adrian (YO8RZZ)
>
>Yes. It would have been way cool if the gnuradio OOT could seamlessly
>inherit the qwt path from stock gnuradio. I am not sure what all the
>cmake hooks are to make that happen. Anyone? - Patches welcome.
>
>> [1] https://github.com/kantooon/qradiolink
>> [2] https://www.youtube.com/watch?v=93nWWASt5a4
>
>Cool.
>
>Good luck,
>-Maitland

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