title: Compiling QScintilla on Ubuntu Fails
body: <p>I'm trying to compile Qscintilla 2.9.2 on Ubuntu 16.04 64bit using Qt 5.7 got the following error message:</p>
  
  <pre><code>-L/home/mwambi/Qt5.7.0/5.7/gcc_64/lib -lQt5PrintSupport -L/usr/lib64 -lQt5Widgets -lQt5Gui -lQt5Core -lpthread -lGL  
  /usr/bin/ld: cannot find -lGL
  collect2: error: ld returned 1 exit status
  Makefile:979: recipe for target 'libqscintilla2.so.12.0.1' failed
  make: *** [libqscintilla2.so.12.0.1] Error 1
  </code></pre>
  
  <p>I do not know what the library GL is and where to find it. How can I solve this?</p>