I believe Marc install the GIST code into the tree long ago.
> Jeff Hoffmann <jeff@propertykey.com> writes:
> > I know there are a couple of GiST examples in contrib (seg, cube &
> > intarray), but i thought there used to be at least a gist_box_ops.
>
> I don't recall any such thing having been removed, but it does seem
> peculiar that there are no GIST opclasses in the standard distribution.
> How the heck did the GIST index code get developed/tested without some
> opclasses?
>
> Anyone remember the history? AFAICT from the CVS logs, GIST was added
> to the tree in mid 1996, but no opclasses for it were added at the time.
> I'd go digging in the maillist archives, but www.postgresql.org is too
> friggin' slow at the moment ...
>
> regards, tom lane
>
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