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Date: Mon, 10 Nov 2003 17:19:58 -0600 (CST)
From: Brian Ford <ford@vss.fsi.com>
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To: Suresh Venkatasubramanian <suresh@research.att.com>
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Subject: Re: OpenGL and cygwin
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On Mon, 10 Nov 2003, Suresh Venkatasubramanian wrote:

> OK. now I am really confused.
> Let me try to summarize what I want to do.
>
> I want to compile an OpenGL program that uses the native windows
> opengl drivers for linking rather than cygwin's libraries.
>
This is part of your confusion.  Cygwin proper has no OpenGL libs (ie.
opengl32, glu32) per se.  It only has import libraries for the Window's
ones.  (Cygwin does have a glut.dll and import lib as you have seen.)

Cygwin XFree86 supplies OpenGL libs (ie. GL, GLU) via Mesa software
emulation.

> I compiled my code using
>
> gcc -mno-cygwin <src files> -lglut32 -lglu32 -lopengl32
>
Did you try it without -mno-cygwin?  You will still get your Nvidia
OpenGL libs, but will be subject to Cygwin's license.

> the code compiles correctly, and does not run, giving the error I
> indicated earlier.
>
Maybe this is because you are getting Cygwin's glut import lib even when
using Nvidia's glut?  Just a guess.

-- 
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
Phone: 314-551-8460
Fax:   314-551-8444

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