I spent today trying to get GLSL 1.50 GSes up and running, so I can port the basic UBO VS/FS tests to 1.50 GSes. I made significant progress on parsing and error checking, and the results are in the "gs" branch of my tree (recently rebased on Paul's). It's stuck currently at:
"error: size of array vertex_to_gs declared as 3, but number of input vertices is 1" and I haven't gone and looked at what's emitting that yet (that's the next step). It's not piglited, and there's some core cleanup that I need to pull out and submit. Just wanted to warn anyone else who might be poking at GS support, so as to avoid duplicated effort.
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