Problem building GNURadio / osmo*

[dongfang]

Hi all,

I am trying to get my old bladeRF X40 going again, and trying to follow this: https://github.com/Nuand/bladeRF/wiki/G ... d%3A-Linux . I have Ubuntu 24.04.LTS, gcc (Ubuntu 13.3.0-6ubuntu2~24.04.1) 13.3.0 .

At this step: pybombs prefix init ~/pybombs/bladeRF -a bladeRF -R gnuradio-default

I get a lot of:
/home/x/pybombs/bladeRF/include/volk/volk_common.h:182:23: error: exponent has no digits
182 | const float a1 = +0x1.ffffeap-1f;
| ^~~~~~~~~~~
/home/x/pybombs/bladeRF/include/volk/volk_common.h:183:23: error: exponent has no digits
183 | const float a3 = -0x1.55437p-2f;
| ^~~~~~~~~~
/home/x/pybombs/bladeRF/include/volk/volk_common.h:184:23: error: exponent has no digits
184 | const float a5 = +0x1.972be6p-3f;
| ^~~~~~~~~~~

I tried to find solutions the lazy way, but this seems not to be a FAQ. It seems GCC doesn't get the hexadecimal decimal literals in there, and it should be passed (?) a something to enable C++17. I don't know how to do that from within the pybombs stuff, can I use an environment variable?

Does somebody know how I can get past this problem?

Thanks a lot -

Kind regards, Soren

[ratketyrees]

Those literals are valid hex floats, so this usually happens when the file is being compiled with the wrong standard or flags. Try forcing -std=gnu11 (or at least C99) via CFLAGS before running pybombs, or check if volk is being built as C++ by mistake.