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Date: Wed, 17 Dec 2008 16:04:17 -0500
To: cygwin AT cygwin DOT com
Subject: Cmake doesn't seem to find the new OpenGL include files correctly
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Reply-To: cygwin AT cygwin DOT com
From: Brian Keener <bkeener AT thesoftwaresource DOT com>
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Working with a project that uses Cmake/ccmake and OpenGL I noticed that 
while cmake seems to locate the Libraries for Opengl correctly in 
/usr/lib/w32api it seems to insist that the include directory is 
/usr/include and not /usr/include/w32api or /usr/include/opengl (as the 
latest patch creates).  

I experimented some with the FindOpenGL.cmake file in 
/usr/share/cmake-2.6.2/modules and it seems no matter what you put in 
for paths or the order that you place for the FIND_PATH command for 
GL/gl.h it will still return /usr/include.  Which based on the latest 
patch and some conflicts that were found after all the X11 rework would 
not be correct (as I think I understand it) especially since it is find 
the lib ini w32api as it should.

This is probably more related to upstream of cmake but thought the 
cmake maintainer might want to take a look and confirm my findings or 
tell me what I  am doing wrong.

Using a Hello world example:

#include <stdio.h>
#include <GL/gl.h>
int main () {
  printf ("Hello World.\n");
  return 0;
}

and a cmakelists.txt like this:

cmake_minimum_required(VERSION 2.0)
project(MyProject)
add_executable(hello Hello.cpp)
FIND_PACKAGE(OpenGL)

you will see what I mean.

bk




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