undefined reference to `modemcf_get_demodulator_evm'

[vampjaz]

i've tried installing Cubicsdr from the AUR on my arch linux machine, and it failed in a number of different ways. so then i tried installing from scratch using the linux build instructions. during the linking stage, i get this error:

 48%] Linking CXX executable x64/CubicSDR
/usr/bin/ld: CMakeFiles/CubicSDR.dir/src/modules/modem/ModemDigital.cpp.o: in function `ModemDigital::updateDemodulatorLock(modemcf_s*, float)':
ModemDigital.cpp:(.text+0xde): undefined reference to `modemcf_get_demodulator_evm'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/CubicSDR.dir/build.make:1461: x64/CubicSDR] Error 1

all the main dependencies have been compiled from scratch from a head branch as per the guide, and i've tried multiple different commits of cubicsdr with no luck. let me know if you want to see more of the logs.

[vsonnier]

Duplicate of #926 : you have to use liquid-dsp master for Cubic due to recent changes that broke the previous API.

[vsonnier]

OK, this may be a different issue than #926. Is it a compiler-specific problem on Linux?

I have no problem building Cubic master and liquid-dsp master for Windows. (VS 2022 for Cubic, linking to liquid-dsp built by MSYS2)

I don't practice Linux, so someone else help would be needed to investigate.

[CristianRossiSorint]

I retried with this package and it worked! https://aur.archlinux.org/packages/liquid-dsp-git/ It seems the version v1.3.2.r445.ge77c20bb, the version indicated in the last comments... from github it didn't worked but from this package yes. No I'll investigate better.

[vsonnier]

Good to know, e77c20bb is indeed the latest version, the one I tried lately, compiling it from sratch. So it was a problem of pre-built binary ?

[CristianRossiSorint]

Maybe it was only a version issue: the 1.3.1 (from AUR, is not 1.3.2 sorry) worked for me, but from Github I tried only 1.3.2 and 1.3.0. I was maybe only unlucky.

[vsonnier]

Liquid-dsp version numbers do not mean much these days because they rarely change: that's why only the git reference matters.

On the other hand, using the master version can break previous compatibility. Cubic was adapted to the bleeding edge liquid-dsp, but it was problematic for some users, as in here : https://github.com/jgaeddert/liquid-dsp/issues/273

[jgaeddert]

Oof. Sorry. See commit ed8bb28 which adds macros for backwards compatibility.

[vsonnier]

No worries @jgaeddert , as I said CubicSDR was already adapted to the new signatures :) Thnaks anyway !