/usr/X11R6/lib?

[A. Jorge Garcia]

I just ran into a snag in my AP Computer Science class. My students just took their AP exams using java and I thought I'd teach them some C++. I haven't taught C++ in several years. So, I was a bit surprised when trying to compile some pixel graphics code that uses a graphics class dependent upon the files in /usr/X11R6/lib and found these files are not included anymore in KNOPPIX 5.1.1. How do I get these files back? The files in question are:

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>

TIA,
AJG

[A. Jorge Garcia]

BTW, I just tried the same code on an old clusterKNOPPIX 3.6 CD and all works great!

Regards,
AJG