title: Xcode install on OSX 10.9 - clang: error: no input files
body: <p>I'm in the process of installing XCode Command Line Tools onto OSX 10.9 Mavericks</p>
  
  <p>I did a successful install XCode:</p>
  
  <pre><code>$ xcode-select -p 
  /Library/Developer/CommandLineTools 
  </code></pre>
  
  <p>However when I type in either <code>$ clang</code> or <code>$ gcc</code> it returns:</p>
  
  <pre><code>clang: error: no input files 
  </code></pre>