I seem to remember that Cygwin does, or used to, leave the OpenGL
headers in a tar.gz file in the root cygwin directory, which you then
need to unpack manually. 
There is a readme in there as well explaining why, I can't remember the
reason off the top of my head.

Richard

> -----Original Message-----
> From: Keith Wiley [mailto:[EMAIL PROTECTED]]
> Sent: 12 February 2002 2:27 am
> To: [EMAIL PROTECTED]
> Subject: Re: [Flightgear-devel] plib can't find GL/gl.h
> 
> 
> > > I'm trying to build plib in anticipation of building simgear and
> > > flightgear, but make is failing saying ul.h can't find GL/gl.h or
> > > GL/glu.h.  This is a perfectly reasonable complaint since 
> a search of my
> > > harddrive has turned up nothing on either of those two files.
> > > 
> > > ...but, I have already installed both the OpenGL binaries 
> and source in
> > > the Cygwin setup program, so I don't know what else to 
> do.  Are these
> > > opengl files?  I'm thinking they might be glut files.  If 
> so, where am I
> > > supposed to get cygwin versions of these files so I can 
> build plib?
> > > 
> > 
> > These are opengl files, not glut files.  On my Cygwin installation, 
> > gl.h and glu.h are in /usr/include/GL, and the libraries are in 
> > /lib/w32api.  If you don't have them in these locations then you 
> > might consider reinstalling Cygwin.  Other than that, I'm 
> really not 
> > sure.
> > 
> > Keep posting if you can't get it fixed.
> 
> No dice.  I put the GL directory in /include but when I run 
> ./configure
> for plib, it says it can't find it, and when I try to make 
> it, it says it
> can't find it.  I would take your advice to reinstall cygwin, but I've
> already done that.  That's how I got into this mess.  I 
> reinstalled cygwin
> from the ground up, and suddenly it couldn't find these header files
> anymore.
> 
> ______________________________________________________________
> __________
> Keith Wiley                                [EMAIL PROTECTED]
> http://www.unm.edu/~keithw                 
http://www.mp3.com/KeithWiley

"Yet mark his perfect self-contentment, and hence learn his lesson,
that to be self-contented is to be vile and ignorant, and that to
aspire is better than to be blindly and impotently happy."
                                           --  Edwin A. Abbott, Flatland
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