title: Qt serial port library
body: <p>I want to make an app using Qt that communicates with serial port.</p>
  
  <p>The problem is that I cant find a library that works and does this thing.
  I need a non General Public License library I think. </p>
  
  <p>Actually I am not sure cause I don't know if I can use a General Public License library for a closed source program.</p>
  
  <p>I found qextserialport but I am unable to build it using Qt 4.7.3. I added all the needed headers but it fails on some functions.</p>
  
  <p>Can anyone help me here?</p>