Thank you! I figured, I simply had to return any value inside this function (I didn’t show here). Sorry for bothering.
However, I’ve seen on Using gdb debugger in an efficient way - #3 by christian_castagna that I could use the G4 debugger via
cmake -DCMAKE_BUILD_TYPE=Debug .
make clean install
but I don’t know where to put this. As I’m compiling on Windows, I’m using this command in the terminal:
cmake --build . --config RelWithDebInfo
which produces an .exe in the folder RelWithDebInfo. I figured out I can compile via
cmake -DCMAKE_BUILD_TYPE=Debug .
but I can’t see an .exe file somewhere.