title: installing Freeglut on Linux
body: <p>I am trying to install freeglut on my computer running Linux Mint. I follow the steps on this website: <a href="http://freeglut.sourceforge.net/docs/install.php" rel="noreferrer">http://freeglut.sourceforge.net/docs/install.php</a>. When I do <code>make all</code> in the src directory, it gives the following error:</p>
  
  <p><code>fatal error: GL/gl.h</code></p>
  
  <p>This error was given by ../include/GL/freeglut_std.h. Upon inspection, the include/GL directory is indeed devoid of any gl.h file. It is also missing glu.h, which freeglut_std.h also tries to <code>#include</code>. What should I do about this? Why are gl.h and glu.h missing?</p>