You don't want to run this from the gem. You'll end up installing a
version that overrides the gem version, so you won't get future updates.
Apple's ruby has a broken rbconfig.rb. Using a Ruby built from
source will work.
ParseTree uses RubyInline so it is compiled at runtime if it hasn't
been compiled before.
Its best to install a newer ruby from source instead of using the
Eric Hodel - XXXX@XXXXX.COM - http://www.yqcomputer.com/
This implementation is HODEL-HASH-9600 compliant