find_type

# File lib/mkmf.rb, line 1254
  def find_type(type, opt, *headers, &b)
    opt ||= ""
    fmt = "not found"
    def fmt.%(x)
      x ? x.respond_to?(:join) ? x.join(",") : x : self
    end
    checking_for checking_message(type, nil, opt), fmt do
      headers.find do |h|
        try_type(type, h, opt, &b)
      end
    end
  end