title: QWT installation file missing on ubuntu
body: <p>I'm trying to install <code>QWT</code> library on my ubuntu machine to use it with <code>QT</code> and <code>cmake</code>. I used the synaptic package manager to download and install the version <code>6.0.0</code> but the problem is when I include <code>qwt/qwt.h</code> in my code I get the following the compilation error:</p>
  
  <pre><code>/usr/include/qwt/qwt_global.h:13:21: fatal error: qglobal.h: No such file or directory
   #include &lt;qglobal.h&gt;
                       ^
  compilation terminated.
  </code></pre>
  
  <p>I could not find anything that fixes it. Any help is appreciated.</p>