module PKGConfig

def check_version?(pkg, major=0, minor=0, micro=0)
  return false unless exist?(pkg)
  ver = modversion(pkg).split(".").collect {|item| item.to_i}
  (0..2).each {|i| ver[i] = 0 unless ver[i]}
  (ver[0] > major ||
   (ver[0] == major && ver[1] > minor) ||
   (ver[0] == major && ver[1] == minor &&
    ver[2] >= micro))
end