require 'formula'

class Gforth < Formula
  homepage 'http://bernd-paysan.de/gforth.html'
  url 'http://www.complang.tuwien.ac.at/forth/gforth/gforth-0.7.2.tar.gz'
  sha256 '77db9071c2442da3215da361b71190bccb153f81f4d01e5e8bc2c2cf8ee81b48'

  depends_on 'libtool' => :run
  depends_on 'libffi'
  depends_on 'pcre'

  def darwin_major_version
    # kern.osrelease: 11.4.2
    full_version = `/usr/sbin/sysctl -n kern.osrelease`
    full_version.split("\.")[0]
  end

  def install
    ENV.deparallelize
    args = %W[--prefix=#{prefix}]

    if MacOS.prefer_64_bit?
      args << "--build=x86_64-apple-darwin#{darwin_major_version}"
    end

    system "./configure", *args
    system "make" # Separate build steps.
    system "make install"
  end
end