class LibunwindHeaders < Formula
  desc "C API for determining the call-chain of a program"
  homepage "https://opensource.apple.com/"
  url "https://opensource.apple.com/tarballs/libunwind/libunwind-35.1.tar.gz"
  sha256 "d88ecd5c37f0c0c4d18feb9be52e7b2363ef2709cd2eb36e2e205f3226110de1"

  bottle do
    cellar :any
    revision 1
    sha1 "48f3fb9243e6a5cd3255a9bc43755aedde545a5d" => :yosemite
    sha1 "022d85a3a7e2368bd9a3cbc679d69f074534f50f" => :mavericks
    sha1 "260e0407173d01261b9a2cb79ccc73ca92866437" => :mountain_lion
  end

  keg_only :provided_by_osx,
    "This package includes official development headers not installed by Apple."

  def install
    inreplace "include/libunwind.h", "__MAC_10_6", "__MAC_NA" if MacOS.version < :snow_leopard

    if MacOS.version < :leopard
      inreplace "include/libunwind.h", /__OSX_AVAILABLE_STARTING\(__MAC_NA,.*\)/,
        "__attribute__((unavailable))"

      inreplace %w[include/libunwind.h include/unwind.h src/AddressSpace.hpp src/InternalMacros.h],
        "Availability.h", "AvailabilityMacros.h"
    end

    include.install Dir["include/*"]
    (include/"libunwind").install Dir["src/*.h*"]
    (include/"libunwind/libunwind_priv.h").unlink
  end
end