(In reply to Andy Furniss from comment #8)
> Using git llvm I only have 3.0, I assume "needs llvm 3.7" should mean >= 3.7?
> 
> glxinfo | grep -i opengl
> OpenGL vendor string: X.Org
> OpenGL renderer string: Gallium 0.4 on AMD TONGA (DRM 3.1.0, LLVM 3.8.0)
> OpenGL version string: 3.0 Mesa 11.1.0-devel (git-c8a61ea)
> OpenGL shading language version string: 1.30

Actually you just need a newer glxinfo, one that will print out both core and
compat profile info.