title: Use of empty enum after switching to XCode6
body: <p>After loading an iPad project in XCode 6, I see "parse issue: use of empty enum" in UIDevice.h.</p>
  
  <p><img src="https://i.stack.imgur.com/9hGtk.png" alt="enter image description here"></p>
  
  <p>The problem goes away if I set the <code>Base SDK</code> to 8.1 (latest), but not if I set it to 7.1. <code>__IPHONE_3_2</code> is less than both of those, so don't quite get it!</p>