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[Carlo de Falco]

On 17/giu/08, at 20:39, Thomas Treichl wrote:

> Shai Ayal schrieb:
>> On Tue, Jun 17, 2008 at 9:18 PM, Carlo de Falco <carlo.defalco at gmail.com 
>> > wrote:
>>> 2) I had to change
>>> #include GL/gl.h    to     #include OpenGL/gl.h
>>> and
>>> #include GL/glu.h   to     #include OpenGL/glu.h
>>> in gl-renderer.h
>> Michael,
>> I think the fltk team have figured out a cross platform way of
>> including the OpenGL headers:
>> http://svn.easysw.com/public/fltk/fltk/tags/release-1.1.8/FL/gl.h
>> http://svn.easysw.com/public/fltk/fltk/tags/release-1.1.8/FL/glu.h
>> maybe we should adopt it?
>
> I wonder where this OpenGL directory comes from or where it should  
> be placed? I searched my Mac for that OpenGL directory but couldn't  
> find it. I have used Apple's original GL framework, the headers are  
> in /usr/X11R6/include/GL and the libs can be accessed by '-framework  
> OpenGL'. There are no changes necessary from my point of view.  
> Somebody please posts the output from
>
>  bash~$ sudo find / -iname OpenGL
>
> and
>
>  bash~$ sudo find / -iname gl.h
>
> Thanks,
>  Thomas

Thomas

as far as I understand
-framework OpenGL and -FOpenGL
on darwin are shortcuts for
-L/System/Library/Frameworks/OpenGL.framework/Libraries
and
-I/System/Library/Frameworks/OpenGL.framework/Headers
and from the apple gcc manpage

"An example include looks like "#include <Framework/header.h>", where
  Framework denotes the name of the framework and header.h is found in
  the "PrivateHeaders" or "Headers" directory."

so I beleive that
#include <OpenGL/gl.h>
includes
-I/System/Library/Frameworks/OpenGL.framework/Headers/gl.h

and indeed FL/gl.h from fltk uses the same include clause:

#  ifdef __APPLE__
#    include <OpenGL/gl.h>
#  else
#    include <GL/gl.h>
#  endif

c.