title: Clang doesn't see basic headers
body: <p>I've tried to compile simple hello world on Fedora 20 with Clang, and I get the following output:</p>
  <blockquote>
  <p>d.cpp:1:10: fatal error: 'iostream' file not found</p>
  <p><code>#include &lt;iostream&gt;</code></p>
  </blockquote>
  <p>I don't have any idea how to resolve it.</p>