cmake: Enable Swift language on macOS

cmake/macos/compilerconfig.cmake

@@ -9,6 +9,8 @@ if(NOT XCODE)
   message(FATAL_ERROR "Building OBS Studio on macOS requires Xcode generator.")
 endif()
 
+enable_language(Swift)
+
 include(compiler_common)
 
 add_compile_options("$<$<NOT:$<COMPILE_LANGUAGE:Swift>>:-fopenmp-simd>")

plugins/mac-virtualcam/src/camera-extension/CMakeLists.txt

@@ -15,8 +15,6 @@ foreach(_uuid IN ITEMS VIRTUALCAM_DEVICE_UUID VIRTUALCAM_SOURCE_UUID VIRTUALCAM_
   endif()
 endforeach()
 
-enable_language(Swift)
-
 set(CMAKE_OSX_DEPLOYMENT_TARGET 13.0)
 
 add_executable(mac-camera-extension)