make WASAPI configurable in autofoo and cmake (default is on.)

closes bug #3798.

CMakeLists.txt

@@ -328,6 +328,7 @@ foreach(_SUB ${SDL_X11_OPTIONS})
 endforeach()
 set_option(VIDEO_COCOA         "Use Cocoa video driver" ${APPLE})
 set_option(DIRECTX             "Use DirectX for Windows audio/video" ${WINDOWS})
+dep_option(WASAPI              "Use the Windows WASAPI audio driver" ON "DIRECTX" OFF)
 set_option(RENDER_D3D          "Enable the Direct3D render driver" ${WINDOWS})
 set_option(VIDEO_VIVANTE       "Use Vivante EGL video driver" ${UNIX_SYS})
 dep_option(VIDEO_VULKAN        "Enable Vulkan support" ON "ANDROID OR APPLE OR LINUX OR WINDOWS" OFF)
@@ -1209,7 +1210,7 @@ elseif(WINDOWS)
       set(SOURCE_FILES ${SOURCE_FILES} ${DSOUND_AUDIO_SOURCES})
     endif()
 
-    if(HAVE_AUDIOCLIENT_H AND HAVE_MMDEVICEAPI_H)
+    if(WASAPI AND HAVE_AUDIOCLIENT_H AND HAVE_MMDEVICEAPI_H)
       set(SDL_AUDIO_DRIVER_WASAPI 1)
       file(GLOB WASAPI_AUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/wasapi/*.c)
       set(SOURCE_FILES ${SOURCE_FILES} ${WASAPI_AUDIO_SOURCES})