require "formula"

class Libpng < Formula
  homepage "http://www.libpng.org/pub/png/libpng.html"
  url "https://downloads.sf.net/project/libpng/libpng16/1.6.16/libpng-1.6.16.tar.xz"
  sha1 "31855a8438ae795d249574b0da15b34eb0922e13"

  bottle do
    cellar :any
    sha1 "f7b47fcf9d4111075745b04b6fbdb63062982bca" => :yosemite
    sha1 "b67793bae0a5d109be5ad19d27bbeb4509f4ecee" => :mavericks
    sha1 "a2fb283d2f96161ecee5d504adb92b26376b7d9e" => :mountain_lion
  end

  keg_only :provided_pre_mountain_lion

  option :universal

  def install
    ENV.universal_binary if build.universal?
    system "./configure", "--disable-dependency-tracking",
                          "--disable-silent-rules",
                          "--prefix=#{prefix}"
    system "make"
    system "make", "test"
    system "make", "install"
  end
end