cocos2dx3.2 Other Linker Flags 设置成 -ObjC 真机编译报错

Undefined symbols for architecture armv7s:

  "_GCControllerDidDisconnectNotification", referenced from:
      -[GCControllerConnectionEventHandler observerConnection:disconnection:] in libcocos2dx iOS.a(CCController-iOS.o)
  "_GCControllerDidConnectNotification", referenced from:
      -[GCControllerConnectionEventHandler observerConnection:disconnection:] in libcocos2dx iOS.a(CCController-iOS.o)
  "_OBJC_CLASS_$_GCController", referenced from:
      objc-class-ref in libcocos2dx iOS.a(CCController-iOS.o)
     (maybe you meant: _OBJC_CLASS_$_GCControllerConnectionEventHandler)
ld: symbol(s) not found for architecture armv7s
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我用的是iphone5c，昨天使用admob的广告，这个sdk要求要将Other Linker Flags 设置成 -ObjC。不知如何解决以上报错。

解决方法：

增加两个库：
MediaPlayer.framework
GameController.framework

原因参见：http://stackoverflow.com/questions/24844766/linking-errors-when-adding-admob-to-ios-cocos2d-x-3-2