[Gnss-sdr-developers] Getting gnss-sdr working with ADALM-Pluto

[Will S. <wsi...@go...>]

Hi,

I'm trying to get gnss-sdr working with ADALM-Pluto as an input source. I
built and installed gnss-sdr with -DENABLE_PLUTOSDR as described here
<https://gnss-sdr.org/docs/sp-blocks/signal-source/#implementation-plutosdr_signal_source>,
but get this error:

plutosdr_signal_source.h:28:10: fatal error: gnuradio/iio/pluto_source.h:
No such file or directory
   28 | #include <gnuradio/iio/pluto_source.h>

As pluto_source.h doesn't exist in gnuradio/gr-iio/include/gnuradio/iio/
<https://github.com/gnuradio/gnuradio/tree/main/gr-iio/include/gnuradio/iio>,
I tried installing https://github.com/analogdevicesinc/gr-iio directly
(which required downgrading gnuradio to v3.8), following
https://wiki.analog.com/resources/tools-software/linux-software/gnuradio.
But this results in the same error about missing pluto_source.h.

I also found in cmake/Modules/FindGNURADIO
<https://github.com/gnss-sdr/gnss-sdr/blob/main/c> that gr-iio is only
included in gnss-sdr if the installed gnuradio version is >3.8.99. So it
seems like installing the standalone gr-iio requires gnuradio v3.8, while
gnss-sdr is requiring v>3.8.99.

I tried removing the >3.8.99 restriction, but this just leads to more
errors, and I suspect I'm going the wrong way:

plutosdr_signal_source.cc: In member function ‘virtual void
PlutosdrSignalSource::connect(gr::top_block_sptr)’:
pllutosdr_signal_source.cc:174:31: error: no matching function for call to
‘gr::top_block::connect(gr::iio::fmcomms2_source<std::complex<float>
>::sptr&, int, gnss_shared_ptr<gr::block>&, int)’
  174 |             top_block->connect(plutosdr_source_, 0, valve_, 0);

Any idea what I might be missing here? I suspect the documentation about
using the pluto signal source
<https://github.com/gnss-sdr/gnss-sdr/blob/main/c> is incorrect in saying
the gr-iio component in gnuradio is ready to go, since it doesn't actually
include the relevant headers.

Thank you!
Will