old_contents: # Copyright (c) 2013, 2015-2017 ARM Limited
  # All rights reserved.
  #
  # The license below extends only to copyright in the software and shall
  # not be construed as granting a license to any other intellectual
  # property including but not limited to intellectual property relating
  # to a hardware implementation of the functionality of the software
  # licensed hereunder.  You may use the software subject to the license
  # terms below provided that you ensure that this notice is replicated
  # unmodified and in its entirety in all distributions of the software,
  # modified or unmodified, in source code or in binary form.
  #
  # Copyright (c) 2011 Advanced Micro Devices, Inc.
  # Copyright (c) 2009 The Hewlett-Packard Development Company
  # Copyright (c) 2004-2005 The Regents of The University of Michigan
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are
  # met: redistributions of source code must retain the above copyright
  # notice, this list of conditions and the following disclaimer;
  # redistributions in binary form must reproduce the above copyright
  # notice, this list of conditions and the following disclaimer in the
  # documentation and/or other materials provided with the distribution;
  # neither the name of the copyright holders nor the names of its
  # contributors may be used to endorse or promote products derived from
  # this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  from __future__ import print_function
  
  # Check for recent-enough Python and SCons versions.
  try:
      EnsureSConsVersion(3, 0, 0)
  except SystemExit as e:
      print("""
  For more details, see:
      http://gem5.org/documentation/general_docs/building
  """)
      raise
  
  
  # Check for the python version. Python 2 is no longer supported.
  try:
      EnsurePythonVersion(3, 0)
  except SystemExit as e:
      print("""\033[93m
  Python 3 is now required.
  
  The following are steps to compile gem5 in Python 3 environment,
  
  *Step 1*: ensure Python 3 is installed. On Ubuntu like systems, you can try \
  this command:
  
      sudo apt-get install python3 python3-six python-is-python3 python3-pydot
  
  To run Python 3 from a container, you can try the Docker files in \
  util/dockerfiles folder.
  
  *Step 2*: ensure that scons is run in the Python 3 environment. If scons \
  isn't run automatically with Python 3, you can force it by replacing `scons` \
  by the following phrase,
  
      /usr/bin/env python3 $(which scons)
  
  For example, the following command will let scons compile gem5/X86 in the \
  Python 3 environment,
  
     /usr/bin/env python3 $(which scons) build/X86/gem5.opt
  
  (Optional) For convenience reasons, you can set up an alias for the Python3 \
  scons phrase in your environment. \033[0m
  """)
      raise
  
  from gem5_python_paths import extra_python_paths
  
  sys.path[1:1] = extra_python_paths
  
new_contents: # Copyright (c) 2013, 2015-2017 ARM Limited
  # All rights reserved.
  #
  # The license below extends only to copyright in the software and shall
  # not be construed as granting a license to any other intellectual
  # property including but not limited to intellectual property relating
  # to a hardware implementation of the functionality of the software
  # licensed hereunder.  You may use the software subject to the license
  # terms below provided that you ensure that this notice is replicated
  # unmodified and in its entirety in all distributions of the software,
  # modified or unmodified, in source code or in binary form.
  #
  # Copyright (c) 2011 Advanced Micro Devices, Inc.
  # Copyright (c) 2009 The Hewlett-Packard Development Company
  # Copyright (c) 2004-2005 The Regents of The University of Michigan
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are
  # met: redistributions of source code must retain the above copyright
  # notice, this list of conditions and the following disclaimer;
  # redistributions in binary form must reproduce the above copyright
  # notice, this list of conditions and the following disclaimer in the
  # documentation and/or other materials provided with the distribution;
  # neither the name of the copyright holders nor the names of its
  # contributors may be used to endorse or promote products derived from
  # this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  from __future__ import print_function
  
  # Check for recent-enough Python and SCons versions.
  try:
      EnsureSConsVersion(3, 0, 0)
  except SystemExit as e:
      print("""
  For more details, see:
      http://gem5.org/documentation/general_docs/building
  """)
      raise
  
  
  # Check for the python version. Python 2 is no longer supported.
  try:
      EnsurePythonVersion(3, 6)
  except SystemExit as e:
      print("""\033[93m
  Python 3 is now required.
  
  The following are steps to compile gem5 in Python 3 environment,
  
  *Step 1*: ensure Python 3 is installed. On Ubuntu like systems, you can try \
  this command:
  
      sudo apt-get install python3 python3-six python-is-python3 python3-pydot
  
  To run Python 3 from a container, you can try the Docker files in \
  util/dockerfiles folder.
  
  *Step 2*: ensure that scons is run in the Python 3 environment. If scons \
  isn't run automatically with Python 3, you can force it by replacing `scons` \
  by the following phrase,
  
      /usr/bin/env python3 $(which scons)
  
  For example, the following command will let scons compile gem5/X86 in the \
  Python 3 environment,
  
     /usr/bin/env python3 $(which scons) build/X86/gem5.opt
  
  (Optional) For convenience reasons, you can set up an alias for the Python3 \
  scons phrase in your environment. \033[0m
  """)
      raise
  
  from gem5_python_paths import extra_python_paths
  
  sys.path[1:1] = extra_python_paths
  
subject: Update the minimum version of python to 3.6.