title: glGenFramebuffers() in Qt get 'was not declared in this scope'
body: <p>I'm trying to compile a code with this call in Qt5 under Linux and I'm getting this error on compile time.</p>
  
  <p>Any problem of compatibility? Any other error</p>
  
  <p>I have this include:</p>
  
  <pre><code>#include &lt;GL/gl.h&gt;
  </code></pre>