Homebrew formula for https://github.com/Yubico/pam-u2f/ (not fully-working)

pam-u2f.rb

class PamU2f < Formula
  desc "The PAM U2F module provides an easy way to integrate the Yubikey (or other U2F-compliant authenticators) into your existing     > user authentication infrastructure."
  homepage "https://developers.yubico.com/pam-u2f/"
  head "https://github.com/Yubico/pam-u2f.git"

  depends_on 'libu2f-host' => :build
  depends_on 'libu2f-server' => :build

  # Required for `autoreconf --install`
  depends_on 'pkg-config' => :build
  depends_on "libtool" => :build
  depends_on "autoconf" => :build
  depends_on "automake" => :build

  # Required for ./configure
  depends_on "asciidoc" => :build

  def install
    system "autoreconf", "--install"

    ENV['A2X'] = "/usr/local/bin/a2x --no-xmllint"
    args = ["--prefix=#{prefix}", "--with-pam-dir=#{lib}/pam"]
    system "./configure", *args
    system "make", "install"
  end
end