buildfix

libretro/libretro.cpp

@@ -1874,6 +1874,7 @@ void System_Notify(SystemNotification notification) {
    }
 }
 bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int param3) { return false; }
+void System_PostUIMessage(const std::string &message, const std::string &param) {}
 void NativeUpdate() {}
 void NativeRender(GraphicsContext *graphicsContext) {}
 void NativeResized() {}