必要なもの

Ruby/Romkan

$ tar xzvf ruby-romkan-0.4.tar.gz
$ cd ruby-romkan-0.4
# cp ./ruby-romkan /usr/local/lib/ruby/1.6

- Ruby/Bsearch
  http://namazu.org/~satoru/ruby-bsearch/ruby-bsearch-1.5.tar.gz

$ tar xzvf ruby-bsearch-1.5.tar.gz
$ cd ruby-bsearch-1.5
# cp ./ruby-bsearch.rb /usr/local/lib/ruby/1.6

- インストール

$ ./configure
$ make
# make install

- .emacs の設定

(load "migemo.el")

Reference