How to disable subsystems in CMake?

[slouken]

How do you disable subsystems in the new CMake build system?

I tried to disable MFI joystick support using the following, and it didn't work: cmake .. -DSDL_JOYSTICK_MFI=OFF -DCMAKE_BUILD_TYPE=Debug

[madebr]

Current cmake only allows you to enable/disable the main SDL subsystems and some extra options.

I even didn't know mfi being an Apple thing until now. I think you can disable it by configuring with -DSDL_JOYSTICK=OFF -DSDL_HAPTIC=OFF.

If you want more fine-grained control/options somewhere, please ask.

[slouken]

We basically want to be able to disable any of the driver related SDL_* defines in SDL_build_config.h.cmake. In this case I was trying to build without MFI support because there's an Apple bug I wanted to workaround for testing. I was able to manually clear it, but I was under the impression that any of the SDL defines could be overridden on the cmake command line.

[iryont]

-DSDL_JOYSTICK_ENABLED_BY_DEFAULT=OFF -DSDL_HAPTIC_ENABLED_BY_DEFAULT=OFF

It does work perfectly fine on MacOS. I had some issues with ARM64 build so I had to disable those.

Edit:

Ohh, I see that you did change it from 2.28.5 which is the way it is as I described above. The part of the CMakeLists.txt changed from:

set(SDL_SUBSYSTEMS
    Atomic Audio Video Render Events Joystick Haptic Hidapi Power Threads Timers
    File Loadso CPUinfo Filesystem Sensor Locale Misc)
foreach(_SUB ${SDL_SUBSYSTEMS})
  string(TOUPPER ${_SUB} _OPT)
  if (NOT DEFINED SDL_${_OPT}_ENABLED_BY_DEFAULT)
    set(SDL_${_OPT}_ENABLED_BY_DEFAULT ON)
  endif()
  option(SDL_${_OPT} "Enable the ${_SUB} subsystem" ${SDL_${_OPT}_ENABLED_BY_DEFAULT})
endforeach()

to:

set(SDL_SUBSYSTEMS
  Atomic
  Audio
  Video
  Render
  Events
  Joystick
  Haptic
  Hidapi
  Power
  Threads
  Timers
  File
  Loadso
  CPUinfo
  Filesystem
  Sensor
  Locale
  Misc
)
foreach(_SUB IN LISTS SDL_SUBSYSTEMS)
  string(TOUPPER ${_SUB} _OPT)
  if(NOT DEFINED SDL_${_OPT}_DEFAULT)
    set(SDL_${_OPT}_DEFAULT ON)
  endif()
  option(SDL_${_OPT} "Enable the ${_SUB} subsystem" ${SDL_${_OPT}_DEFAULT})
endforeach()

So now that would be:

-DSDL_JOYSTICK_DEFAULT=OFF -DSDL_HAPTIC_DEFAULT=OFF