Missing file from gtkglext package

I am attempting to open the gtkglext-1.0 package to make use of OpenGL. When I attempt to compile a small program to check the library, I get this:

john@John-1204LTS:~/dev/OpenGLTest$ make
cc -I /usr/include/glib-2.0 -I /usr/include/gtkglext-1.0 -c -o main.o main.c
In file included from main.c:24:0:
/usr/include/gtkglext-1.0/gdk/gdkgl.h:22:29: fatal error: gdkglext-config.h: No such file or directory
compilation terminated.
make: *** [main.o] Error 1

I've spent two days diligently searching for this file and it is nowhere to be found. Here is the header file segment that calls for it:

ifndef __GDK_GL_H__
#define __GDK_GL_H__

#include <gdkglext-config.h> <-----------------------------------------------------------------

#include <gdk/gdkgldefs.h>
#include <gdk/gdkglversion.h>

And a list of the relevant include directory.

john@John-1204LTS:/usr/include/gtkglext-1.0/gdk$ ls
gdkglconfig.h gdkgldefs.h gdkglfont.h gdkgl.h.gch gdkglquery.h gdkgltypes.h glext
gdkglcontext.h gdkgldrawable.h gdkglglext.h gdkglinit.h gdkglshapes.h gdkglversion.h x11
gdkgldebug.h gdkglenumtypes.h gdkgl.h gdkglpixmap.h gdkgltokens.h gdkglwindow.h

All of the files called for in the top-level include are present except the one flagged.

Is this file available? Was it omitted accidently from the distribution?

I am working the example in Devhelp for this, and it would be nice to know if the documentation is correct.

All I really want to do in this program is verify that the library can be opened.