Hi,

In <CAESf5idUVQeAfXK=NEA9aRg5rRsc-qO7S7-A-z-qerq+LwpxOQ / mail.gmail.com>
  "Re: Fatal Error with Ruby/GTK2, Homebrew, Green Shoes, and OSX Snow Leopard" on Sat, 9 Jul 2011 13:07:34 +0900,
  Timothy Barnes <barnes7td / gmail.com> wrote:

> I can't find that directory at all. is it ~/opt/local/......? much less the
> file

How did you install cairo 1.10.0?
rcairo needs to find cairo.pc for detecting include path of
cairo. cairo.pc has the information.

Thanks,
--
kou