class Gem::Platform

def ===(other)
  return nil unless Gem::Platform === other
  # cpu
  ([nil,'universal'].include?(@cpu) or [nil, 'universal'].include?(other.cpu) or @cpu == other.cpu or
  (@cpu == 'arm' and other.cpu =~ /\Aarm/)) and
  # os
  @os == other.os and
  # version
  (@version.nil? or other.version.nil? or @version == other.version)
end