Error when building on Fedora 34

[ingframin]

Hello,
I am having some errors when building on Fedora 34 / gnuradio 3.9.
I generated the makefiles with Cmake, it was a bit hard, but managed to get all the dependencies in place.

However, when I run make I get the following:

$ make [ 4%] [BISON][parser] Building parser with bison 3.7.4 [ 8%] [FLEX][lexer] Building scanner with flex 2.6.4 Scanning dependencies of target gnuradio-iio [ 13%] Building CXX object lib/CMakeFiles/gnuradio-iio.dir/device_source_impl.cc.o /home/user/gr-iio/lib/device_source_impl.cc: In static member function ‘static gr::iio::device_source::sptr gr::iio::device_source::make(const string&, const string&, const std::vector<std::__cxx11::basic_string<char> >&, const string&, const std::vector<std::__cxx11::basic_string<char> >&, unsigned int, unsigned int)’: /home/user/gr-iio/lib/device_source_impl.cc:45:9: error: could not convert ‘gnuradio::get_initial_sptr(T*) [with T = gr::iio::device_source_impl]()’ from ‘std::shared_ptr<gr::iio::device_source_impl>’ to ‘gr::iio::device_source::sptr’ {aka ‘boost::shared_ptr<gr::iio::device_source>’} 44 | return gnuradio::get_initial_sptr | ~~~~~~~~~~~~~~~~~~~~~~~~~~ 45 | (new device_source_impl(device_source_impl::get_context(uri), true, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | std::shared_ptr<gr::iio::device_source_impl> 46 | device, channels, device_phy, | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 47 | params, buffer_size, decimation)); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /home/user/gr-iio/lib/device_source_impl.cc: In static member function ‘static gr::iio::device_source::sptr gr::iio::device_source::make_from(iio_context*, const string&, const std::vector<std::__cxx11::basic_string<char> >&, const string&, const std::vector<std::__cxx11::basic_string<char> >&, unsigned int, unsigned int)’: /home/user/gr-iio/lib/device_source_impl.cc:58:9: error: could not convert ‘gnuradio::get_initial_sptr(T*) [with T = gr::iio::device_source_impl]()’ from ‘std::shared_ptr<gr::iio::device_source_impl>’ to ‘gr::iio::device_source::sptr’ {aka ‘boost::shared_ptr<gr::iio::device_source>’} 57 | return gnuradio::get_initial_sptr | ~~~~~~~~~~~~~~~~~~~~~~~~~~ 58 | (new device_source_impl(ctx, false, device, channels, device_phy, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | std::shared_ptr<gr::iio::device_source_impl> 59 | params, buffer_size, decimation)); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ make[2]: *** [lib/CMakeFiles/gnuradio-iio.dir/build.make:93: lib/CMakeFiles/gnuradio-iio.dir/device_source_impl.cc.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:225: lib/CMakeFiles/gnuradio-iio.dir/all] Error 2 make: *** [Makefile:149: all] Error 2
The system correctly works with Pluto SDR using SoapySDR in my C++ code.
The problem is when building gr-iio.
Any idea about what it could be?

[wheberth]

I am also having problems building it on Fedora 34. I have checked out the branch "cmake-update-3.8" as it explicitly states that GR 3.9 should be supported. However cmake complains about not finding GrSwig:

`CMake Error at swig/CMakeLists.txt:36 (include):
include could not find requested file:

GrSwig

CMake Error at swig/CMakeLists.txt:47 (GR_SWIG_MAKE):
Unknown CMake command "GR_SWIG_MAKE".

-- Configuring incomplete, errors occurred!`

[tfcollins]

gr-iio 3.8 branches do not support 3.9 since it switched from swig to pybindC++. Currently 3.9 is not supported.

[mobilinkd]

Will gr-iio ever support GNU Radio 3.9?

[computer-wizard]

Version 3.10.0.0 will have it built-in See https://github.com/gnuradio/gnuradio/releases/tag/v3.10.0.0-rc1
The stable release is planned for the end of January they say.

[mobilinkd]

I understand. But there are distributions that will be around for at least another year or two that ship with GNU Radio 3.9. The ADALM Pluto is currently unusable on those platforms.

[computer-wizard]

I was in the same situation around spring of last year as I couldn't use my PlutoSDR anymore after an upgrade. Luckily as of GnuRadio 3.9.4.0 (or maybe even a little bit earlier) there is support for the Soapy blocks, including the Pluto. You have to compile the SoapyPlutoSDR hardware driver yourself. You can download the source from https://github.com/pothosware/SoapyPlutoSDR You may also read pothosware/SoapyPlutoSDR#45 of how to increase the buffer size in PlutoSDR_Streaming.cpp at line 176 & 610. I changed it to 64k ( 65536) to get the highest throughput (and sample rate). I also installed the Soapy Server/Remote locally. With that I could even get an higher sample rate as the Soapy Server can convert from CS 8 to CS 16 . In the Soapy Pluto Sink of GnuRadio I use, 'format=CS8,driver=remote,remote=tcp://127.0.0.1:55132,remote:driver=plutosdr' for the device arguments. tcp port has to be
adapted to the local situation, For me this gives even an higher throughput/SR as with gr-iio