Compiling Indvidual Modules In Gnu radio

Question

I am new to open source contribution, so after editing the source code for gnu-radio, I want to only compile the gr-qtqui module.

I ran cmake with the following flags:

cmake -DCMAKE_BUILD_TYPE=Debug -DENABLE_DEFAULT=OFF -DENABLE_GR_QTGUI=ON -DCMAKE_INSTALL_PREFIX=/somedir -DPYTHON_EXECUTABLE=/usr/bin/python3 ../

However I encountered this error:

-- Configuring gr-qtgui support...
--   Dependency QT_FOUND = 1
--   Dependency QWT_FOUND = TRUE
--   Dependency ENABLE_GNURADIO_RUNTIME = OFF
--   Dependency ENABLE_GR_FFT =
--   Dependency ENABLE_GR_FILTER =
--   Dependency PYTHONLIBS_FOUND = TRUE
--   Dependency PYQT5_FOUND = TRUE
CMake Error at cmake/Modules/GrComponent.cmake:72 (message):
  user force-enabled gr-qtgui but configuration checked failed
Call Stack (most recent call first):
  gr-qtgui/CMakeLists.txt:33 (gr_register_component)

After enabling both dependencies, I encountered the same error because the dependencies has dependencies. Is there any way I would compile only the file I made changes too?

Answer 1

The CMake output tells you what is wrong: to build gr-qtgui, you need to have the gnuradio-runtime enabled; also, the gr-filter and gr-fft components. They are internal dependencies! You can't build gr-qtgui without building these.