title: error: dns_sd.h: No such file or directory
body: <p>I'm trying to build a demo project using Bonjour, following <a href="http://doc.qt.digia.com/qq/qq23-bonjour.html">this tutorial</a>, but i'm getting this error:</p>
  
  <blockquote>
    <p>error: dns_sd.h: No such file or directory</p>
  </blockquote>
  
  <p>It happens on this line:</p>
  
  <pre><code>#include &lt;dns_sd.h&gt;
  </code></pre>
  
  <p>Where do I get that header file?</p>