Minor cleanup of CMakeLists.txt files, it works better with Code::Blocks+MinGW (glut32,opengl32,glu32)

CMakeLists.txt

@@ -1,7 +1,57 @@
+cmake_minimum_required(VERSION 2.4)
+
 PROJECT(BULLET_PHYSICS)
 
 IF (NOT CMAKE_BUILD_TYPE)
  SET(CMAKE_BUILD_TYPE "Release")
 ENDIF (NOT CMAKE_BUILD_TYPE) 
 
+ 
+  
+IF(COMMAND cmake_policy)
+   cmake_policy(SET CMP0003 NEW)
+ENDIF(COMMAND cmake_policy)
+   
+
+# This is the shortcut to finding GLU, GLUT and OpenGL if they are properly installed on your system
+# This should be the case.
+
+FIND_PACKAGE(OpenGL)
+IF (OPENGL_FOUND)
+MESSAGE("OPENGL FOUND")
+MESSAGE(${OPENGL_LIBRARIES})
+ELSE (OPENGL_FOUND)
+MESSAGE("OPENGL NOT FOUND")
+SET(OPENGL_gl_LIBRARY opengl32)
+SET(OPENGL_glu_LIBRARY glu32)
+ENDIF (OPENGL_FOUND)
+
+FIND_PACKAGE(GLU)
+
+FIND_PACKAGE(GLUT)
+IF (GLUT_FOUND)
+MESSAGE("GLUT FOUND")
+MESSAGE(${GLUT_glut_LIBRARY})
+ELSE (GLUT_FOUND)
+
+IF (MINGW)
+MESSAGE ("GLUT NOT FOUND not found, trying to use MINGW glut32")
+SET(GLUT_glut_LIBRARY glut32)
+ENDIF (MINGW)
+
+IF (MSVC)
+MESSAGE ("GLUT NOT FOUND, trying to use Bullet/Glut/glut32.lib for MSVC")
+SET(GLUT_glut_LIBRARY ${BULLET_PHYSICS_SOURCE_DIR}/Glut/glut32.lib)
+ENDIF (MSVC)
+ENDIF (GLUT_FOUND)
+
+
+IF (WIN32)
+  INCLUDE_DIRECTORIES(${BULLET_PHYSICS_SOURCE_DIR}/Glut)
+ELSE (WIN32)
+  # This is the lines for linux.  This should always work if everything is installed and working fine.
+  INCLUDE_DIRECTORIES(/usr/include /usr/local/include ${GLUT_INCLUDE_DIR}) 
+ENDIF (WIN32)
+
+
 SUBDIRS(src Demos Extras)