This patch spawns from this game engine issue:

[#7113] GE crash pressing as soon as P on 64 bit


Note:         glext.h has been removed from the source
        If you get errors compiling with it you have 2 options
                download/install 	glext.h        (preferred method)
                or set WITH_BF_GLEXT=false
        If your a user and having problems with game engine try
                setting the env var: WITHOUT_GLEXT 1

Kent

source/gameengine/Rasterizer/SConscript

@@ -3,6 +3,10 @@ Import ('env')
 
 sources = env.Glob('*.cpp')
 
+if env['WITH_BF_GLEXT'] == 1:
+        env['CPPFLAGS'].append('-DWITH_GLEXT')
+
+
 incs = '. #source/kernel/gen_system #intern/string #intern/moto/include'
 
 if env['OURPLATFORM']=='win32-vc':