audio_core: Only include cubeb if it's available

src/audio_core/CMakeLists.txt

@@ -39,4 +39,5 @@ endif()
 
 if(ENABLE_CUBEB)
     target_link_libraries(audio_core PRIVATE cubeb)
+    add_definitions(-DHAVE_CUBEB=1)
 endif()

src/audio_core/sink_details.cpp

@@ -11,14 +11,18 @@
 #ifdef HAVE_SDL2
 #include "audio_core/sdl2_sink.h"
 #endif
+#ifdef HAVE_CUBEB
 #include "audio_core/cubeb_sink.h"
+#endif
 #include "common/logging/log.h"
 
 namespace AudioCore {
 
 // g_sink_details is ordered in terms of desirability, with the best choice at the top.
 const std::vector<SinkDetails> g_sink_details = {
+#ifdef HAVE_CUBEB
     {"cubeb", []() { return std::make_unique<CubebSink>(); }},
+#endif
 #ifdef HAVE_SDL2
     {"sdl2", []() { return std::make_unique<SDL2Sink>(); }},
 #endif