[CMake] Why is FindOpenGL in Mac looking for OpenGL/gl.h??

[Fernando Cacciola]

Mike Jackson wrote:
> Which version of Qt are you using? Qt 4.x is only officially supported 
> on the native window system (Quartz/Carbon) NOT X11. Qt 3.x _may_ run 
> under X11 on OS X so I don't know.
> 
We still use Qt 3.x as a matter of fact.

> If some one new to OS X just did a locate on gl.h  then they may have 
> found the wrong gl.h, or they really are running your project as an X11 
> application (non native window environment on OS X).
> 
Our users will run whatever Qt is generating.. it could be an X11 app in 
the case of Qt 3.x, I don't know.

Btw, my user reported that "OpenGl/gl.h" does in fact compile,
so it seems we'll fix it at the header file side via an __APPLE__ guard.

Best

Fernando