text: ##############################################################################
  # Copyright (c) 2013-2018, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://github.com/spack/spack
  # Please also see the NOTICE and LICENSE files for our notice and the LGPL.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU Lesser General Public License (as
  # published by the Free Software Foundation) version 2.1, February 1999.
  #
  # This program is distributed in the hope that it will be useful, but
  # WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
  # conditions of the GNU Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  ##############################################################################
  from spack import *
  
  
  class Autoconf(AutotoolsPackage):
      """Autoconf -- system configuration part of autotools"""
  
      homepage = 'https://www.gnu.org/software/autoconf/'
      url = 'http://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz'
  
      version('2.69', '82d05e03b93e45f5a39b828dc9c6c29b')
      version('2.62', '6c1f3b3734999035d77da5024aab4fbd')
      version('2.59', 'd4d45eaa1769d45e59dcb131a4af17a0')
      version('2.13', '9de56d4a161a723228220b0f425dc711')
  
      # Note: m4 is not a pure build-time dependency of autoconf. m4 is
      # needed when autoconf runs, not only when autoconf is built.
      depends_on('m4@1.4.6:', type=('build', 'run'))
      depends_on('perl', type=('build', 'run'))
  
      build_directory = 'spack-build'
  
      def patch(self):
          # The full perl shebang might be too long; we have to fix this here
          # because autom4te is called during the build
          filter_file('^#! @PERL@ -w',
                      '#! /usr/bin/env perl',
                      'bin/autom4te.in')
  
      @run_after('install')
      def filter_sbang(self):
          # We have to do this after install because otherwise the install
          # target will try to rebuild the binaries (filter_file updates the
          # timestamps)
  
          # Revert sbang, so Spack's sbang hook can fix it up
          filter_file('^#! /usr/bin/env perl',
                      '#! {0} -w'.format(self.spec['perl'].command.path),
                      self.prefix.bin.autom4te,
                      backup=False)
  
      def _make_executable(self, name):
          return Executable(join_path(self.prefix.bin, name))
  
      def setup_dependent_package(self, module, dependent_spec):
          # Autoconf is very likely to be a build dependency,
          # so we add the tools it provides to the dependent module
          executables = ['autoconf',
                         'autoheader',
                         'autom4te',
                         'autoreconf',
                         'autoscan',
                         'autoupdate',
                         'ifnames']
          for name in executables:
              setattr(module, name, self._make_executable(name))
  