.rb

module Foo
  module Symbols__
    module ExtLibC
      extend Fiddle::Importer
      dllload "cygwin1.dll"
      extern "int puts(const char*);"
    end
  end

  def self.method_missing(m, *a, &b)
    if Symbols__::ExtLibC.respond_to?(m)
      Symbols__::ExtLibC.public_send(m, *a, &b)
    else
      super
    end
  end
end

p Foo.puts("Hello")