title: C11 GCC threads.h not found?
body: <p>The following code</p>
  
  <pre><code>#include &lt;threads.h&gt;
  </code></pre>
  
  <p>Gives me this error:</p>
  
  <pre><code>fatal error: threads.h: No such file or directory
  </code></pre>
  
  <p>Using the latest GCC and Clang with -std=c11.</p>
  
  <p>Is C11 threading not supported by GCC and Clang? Or is there a hack (or something to install) to get it? I'm just using Ubuntu 14.04 with the gcc and clang packages from the Ubuntu repo.</p>