Building on Fedora 32 (beta)

[jawatson]

I had a problem compiling the API3+RSPduo branch Fedora 32 (beta), using cmake version 3.17.0. The results of my initial attempts using cmake and make are shown below;

[jwatson@merlin build]$ cmake ..
-- Build type not specified: defaulting to release.
-- LIBSDRPLAY_INCLUDE_DIRS - /usr/local/include
-- LIBSDRPLAY_LIBRARIES - /usr/local/lib/libsdrplay_api.so
-- Module sdrPlaySupport configured with version: 0.3.0-9746de2
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jwatson/develop/SoapySDRPlay/build
[jwatson@merlin build]$ make
Scanning dependencies of target sdrPlaySupport
[ 16%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Registration.cpp.o
[ 33%] Building CXX object CMakeFiles/sdrPlaySupport.dir/sdrplay_api.cpp.o
[ 50%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Settings.cpp.o
[ 66%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Streaming.cpp.o
[ 83%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Version.cpp.o
[100%] Linking CXX shared module libsdrPlaySupport.so
/usr/bin/ld: CMakeFiles/sdrPlaySupport.dir/Streaming.cpp.o: in function `SoapySDRPlay::acquireReadBuffer(SoapySDR::Stream*, unsigned long&, void const**, int&, long long&, long)':
Streaming.cpp:(.text+0xa9d): undefined reference to `pthread_cond_clockwait'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/sdrPlaySupport.dir/build.make:163: libsdrPlaySupport.so] Error 1
make[1]: *** [CMakeFiles/Makefile2:93: CMakeFiles/sdrPlaySupport.dir/all] Error 2
make: *** [Makefile:147: all] Error 2
[jwatson@merlin build]$

I re-ran with make VERBOSE=1 and didn't see any pthread flags so following on from this StackOverflow post I added the following lines to CMakeLists.txt and the library now compiles;

set(CMAKE_LINKER_FLAGS "-pthread" CACHE STRING "Linker Flags" FORCE)
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_LINKER_FLAGS}" CACHE STRING "" FORCE)
set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_LINKER_FLAGS}" CACHE STRING "" FORCE)
set(CMAKE_EXE_LINKER_FLAGS    "${CMAKE_LINKER_FLAGS}" CACHE STRING "" FORCE)

[jwatson@merlin build]$ cmake ..
-- Build type not specified: defaulting to release.
-- LIBSDRPLAY_INCLUDE_DIRS - /usr/local/include
-- LIBSDRPLAY_LIBRARIES - /usr/local/lib/libsdrplay_api.so
-- Module sdrPlaySupport configured with version: 0.3.0-9746de2
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jwatson/develop/SoapySDRPlay/build
[jwatson@merlin build]$ make clean && make
Scanning dependencies of target sdrPlaySupport
[ 16%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Registration.cpp.o
[ 33%] Building CXX object CMakeFiles/sdrPlaySupport.dir/sdrplay_api.cpp.o
[ 50%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Settings.cpp.o
[ 66%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Streaming.cpp.o
[ 83%] Building CXX object CMakeFiles/sdrPlaySupport.dir/Version.cpp.o
[100%] Linking CXX shared module libsdrPlaySupport.so
[100%] Built target sdrPlaySupport
[jwatson@merlin build]$ 

[fventuri]

Thanks @jawatson for this report.
I apologize that I didn't see up until now.
A month or so ago I moved all the development of this module here: https://github.com/SDRplay/SoapySDRPlay, and I forgot to update the README here about this move (I just did do that).

Anyway, I am on Fedora 32 too now (I upgraded from 31 to 32 a couple of weeks ago, I think); I just tried to compile it, and I seeing the same error.

Tomorrow morning I'll look into this bug, and I'll push a fix in the repository I mentioned above.

Thanks for reporting it and also many thanks for suggesting how to fix it.
Franco