title: Qt debian/ubuntu: Can't compile, error: cannot find -lGL
body: <p>I have a problem building applications in Qt on Debian. </p>
  
  <p>When I try to compile anything I get:</p>
  
  <p><code>/usr/bin/ld: cannot find -lGL
  collect2: error: ld returned 1 exit status
  make: *** [test] Error 1
  14:38:52: Proces "/usr/bin/make" zakończył się kodem wyjściowym 2.</code></p>
  
  <p>Last line means: <code>Procces(...)</code> exited with code: <code>2</code></p>
  
  <p>Any idea what's wrong?</p>