missing gll.h and gll.hpp

Hi,
I found this thread which was closed : Glsdk missing include files after Premake build - OpenGL: Basic Coding - Khronos Forums
I’m having a similar problem; gll.h and gll.hpp doesn’t exist in the glsdk and so I can’t build my projects following the arcsynthetis tutorial.
Am I doing anything wrong, or that tutorial just getting old?

So I downloaded GLSDK 4 instead and it worked, perhaps author of tutorial want to add that.