new_contents: ##############################################################################
  # Copyright (c) 2013-2017, 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 TclItcl(AutotoolsPackage):
      """[incr Tcl] is the most widely used O-O system for Tcl. The name is a
      play on C++, and [incr Tcl] provides a similar object model, including
      multiple inheritence and public and private classes and variables."""
  
      homepage = "https://sourceforge.net/projects/incrtcl/"
      url      = "https://sourceforge.net/projects/incrtcl/files/%5Bincr%20Tcl_Tk%5D-4-source/itcl%204.0.4/itcl4.0.4.tar.gz"
  
      version('4.0.4', 'c9c52afdd9435490e2db17c3c6c95ab4')
  
      extends('tcl')
  
      def configure_args(self):
          args = [
              '--enable-shared',
              '--enable-threads',
              '--with-tcl=' + self.spec['tcl'].tcl_lib_dir,
          ]
          return args
  
subject: Add package tcl-itcl (#8578)