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Date: Wed, 20 Apr 2005 08:17:24 -0400
From: Walt K Michlauk <wkm4 AT psu DOT edu>
Subject: OpenGL problems
To: cygwin AT cygwin DOT com
Message-id: <6.2.1.2.2.20050420080737.02b733c0@imap.arl.psu.edu>
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Dear Cygwin

I've just downloaded the full complement of CYGWIN and CYGWIN/X files with 
the intent of doing builds of some standard X Windows / OpenGl (and also 
Motif) programs .  However, I am encountering difficulties.  Could you 
please help me with the following :

I'm unable to compile Kilgard's glxsimple.c on my Cygwin 
installation.  I've tried using the following command, which works on my 
Redhat Linux 8.0 laptop :

	gcc -o glxsimple glxsimple -lGL -LX11R6

but it resulted in a "no such file : GL/glx.h" error. I adjusted this to

	gcc -o glxsimple glxsimple -I/usr/X11R6/include -lGL -LX11R6

which seemed to compile, but produced a "cannot find -lGL" from the linker.

After reading /usr/doc/opengl-1.1.0, I then tried

gcc -o glxsimple glxsimple -I/usr/X11R6/include -Lw32api -lopengl -LX11R6

which again appeared to compile, but resulted in a mound of "undefined 
reference" messages to GL function calls, and some to X calls as well.

Can you please provide any help at all ?  An explicit compile and link 
instruction is what I need, but even the command to build Oliver Jones 
"Hello World" (from his "Introduction to the X Window system") or something 
from Kilgard (involving X, OpenGL, and Motif) on Cygwin would be extremely 
helpful.

Thanks for the consideration.

Walt Michaluk


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