obs-studio/shared/obs-scripting/cmake/lua.cmake

cmake_minimum_required(VERSION 3.22...3.25)

option(ENABLE_SCRIPTING_LUA "Enable Lua scripting support" ON)

if(ENABLE_SCRIPTING_LUA)
  add_subdirectory(obslua)

  find_package(Luajit REQUIRED)

  add_custom_command(
    OUTPUT swig/swigluarun.h
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
    PRE_BUILD
    COMMAND ${CMAKE_COMMAND} -E make_directory swig
    COMMAND ${CMAKE_COMMAND} -E env "SWIG_LIB=${SWIG_DIR}" ${SWIG_EXECUTABLE} -lua -external-runtime swig/swigluarun.h
    COMMENT "obs-scripting - generating Luajit SWIG interface headers"
  )

  set_source_files_properties(swig/swigluarun.h PROPERTIES GENERATED TRUE)

  target_sources(
    obs-scripting
    PRIVATE
      $<$<BOOL:${ENABLE_UI}>:obs-scripting-lua-frontend.c>
      obs-scripting-lua-source.c
      obs-scripting-lua.c
      obs-scripting-lua.h
      swig/swigluarun.h
  )

  target_compile_definitions(obs-scripting PUBLIC LUAJIT_FOUND)

  set_source_files_properties(
    obs-scripting-lua.c
    obs-scripting-lua-source.c
    PROPERTIES COMPILE_OPTIONS $<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang>:-Wno-error=shorten-64-to-32>
  )

  target_link_libraries(obs-scripting PRIVATE Luajit::Luajit)
else()
  target_disable_feature(obs-scripting "Lua scripting support")
endif()