title: Clang error when compiling in CodeRunner
body: <p>I've used CodeRunner (<a href="http://krillapps.com/coderunner" rel="nofollow">http://krillapps.com/coderunner</a>) for a long time but recently I can't compile any Objective-C code in it. I think this started happening around the time I updated to Xcode 5.1. I can still compile and run as normal in Xcode.</p>
  
  <p>When I try to run in CodeRunner, the following error is printed.</p>
  
  <pre><code>clang: error: unknown argument: '-finput-charset=UTF-8' [-Wunused-command-line-argument-hard-error-in-future]
  clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
  </code></pre>
  
  <p>I've tried searching for what this error means but I can't find much. Has anyone got any ideas of what this might be?</p>
  
  <p>Thanks in advance.</p>