[cmake] add OpenGL headers and libs path; replace lua math lib

[michaelvoliveira]

Duggan is doing a port of Ogre3D for Haiku. It uses cmake as build system but our cmake port not recognize the GL headers nor GL libs.

On the other hand, for Wesnoth port, cmake don't find lua math library (libm), of course.
So I use the same lua for it.. and all works fine.

[augiedoggie]

This patch is not acceptable.

For one thing it will break the FindLua51.cmake package for everyone besides Haiku. You need to add a check like 'AND NOT BEOS' to the 'IF' statement.

In FindOpenGL.cmake it would probably be better to use the gcc specific library path '/boot/develop/lib/x86/'

I'ts not a good idea to remove the UNIX definition in the Haiku.cmake module. Besides the fact that it's the wrong way to do it, some ports are already using this. Despite what some would like to believe, Haiku is pretty close to being UNIX as far as cmake is concerned.

[michaelvoliveira]

augiedoggie

[michaelvoliveira]

recreated with augiedoggie suggestions, for GL, GLUT and LUA

[scottmc]

Applied in r1333.