title: Qt multimedia: cannot find -lpulse
body: <p>I modified .pro: </p>
  
  <pre><code>QT += core gui multimedia multimediawidgets
  </code></pre>
  
  <p>And I include <code>&lt;QMediaPlayer&gt;</code>, <code>&lt;QVideoWidgets&gt;</code> in main.cpp</p>
  
  <p>Then I tried to build. It gives me following errors:</p>
  
  <pre><code>cannot find -lpulse-mainloop-glib
  cannot find -lpulse
  collect2:error:ld returned 1 exit status
  </code></pre>
  
  <p>Can anyone help me? My system is Ubuntu 16.04 LTS.</p>