title: Could not build module 'AVFoundation'
body: <p>I've suddenly run into an issue when trying to build and run my app - I need to use AVFoundation and suddenly it's telling me the below message</p>
  
  <p>Could not build module 'AVFoundation'</p>
  
  <p>This comes a long with some other issues such as:
  /Library/Frameworks/CoreMIDI.framework/Headers/MIDIDriver.h:390:83: Expected ')'</p>
  
  <p>Which I find odd...</p>
  
  <p>If I remove the import it of course builds and runs just fine.</p>
  
  <p>I have tried several things i.e. adding it to Link Binary with Libraries, clearing derived data, cleaning the project etc etc with no luck.</p>
  
  <p>I'm at a loss with this so any help would be much appreciated.</p>
  
  <p>I'm running Xcode 9 and using CocoaPods - I'm also embedding some swift into my objective C code - something new to me, so could it be related to that perhaps?</p>
  
  <p>Thanks in advance for any help!</p>