Anyone get ruby-fltk to work?

I was trying to get ruby-fltk to work, but found that when I do a:

require ‘fltk’ -or- requre ‘ruby-fltk’

That there are missing symbols in the shared lib.
I tried several versions of fltk:
1.1.2
1.1.1
1.1.0

But there were missing symbols in each case.

Anyone get this to work?

Phil