Maybe (and likely) I'm missing something but it seems that gl.h file in 7.2 release is 6.5.1 version (and thus has only GL functionality <=1.3) File: http://cgit.freedesktop.org/mesa/mesa/tree/include/GL/gl.h?h=mesa_7_2_branch
Just ignore the comment in gl.h I don't always update the comments when I make a new release. The GL/gl.h in Mesa 7.2 #includes GL/glext.h which defines all the tokens/functions up through OpenGL 3.0
*** Bug 21346 has been marked as a duplicate of this bug. ***
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