old_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  import subprocess
  import sys
  
  
  os = 'posix'  # default OS
  options = sys.argv[1:]
  if (len(options) > 0) and not options[0].startswith('--'):
      os = options[0]
      options = options[1:]
  
  options += [
      '--with-os=' + os,
      '--enable-rdp',
      '--enable-promisc',
      '--enable-crc32',
      '--enable-hmac',
      '--enable-xtea',
      '--enable-dedup',
      '--with-loglevel=debug',
      '--enable-debug-timestamp'
  ]
  
  waf = ['./waf']
  if os in ['posix']:
      options += [
          '--enable-python3-bindings',
          '--enable-can-socketcan',
          '--with-driver-usart=linux',
          '--enable-if-zmqhub',
          '--enable-shlib'
      ]
  
  if os in ['macosx']:
      options += [
          '--with-driver-usart=linux',
      ]
  
  if os in ['windows']:
      options += [
          '--with-driver-usart=windows',
      ]
      waf = ['python', '-x', 'waf']
  
  # Build
  waf += ['distclean', 'configure', 'build']
  print("Waf build command:", waf)
  subprocess.check_call(waf + options +
                        ['--enable-qos', '--with-rtable=cidr', '--disable-stlib', '--disable-output'])
  subprocess.check_call(waf + options + ['--enable-examples'])
  
new_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  import subprocess
  import sys
  
  
  os = 'posix'  # default OS
  options = sys.argv[1:]
  if (len(options) > 0) and not options[0].startswith('--'):
      os = options[0]
      options = options[1:]
  
  options += [
      '--with-os=' + os,
      '--enable-rdp',
      '--enable-promisc',
      '--enable-crc32',
      '--enable-hmac',
      '--enable-xtea',
      '--enable-dedup',
      '--with-loglevel=debug',
      '--enable-debug-timestamp'
  ]
  
  waf = ['./waf']
  if os in ['posix']:
      options += [
          '--enable-python3-bindings',
          '--enable-can-socketcan',
          '--with-driver-usart=linux',
          '--enable-if-zmqhub',
          '--enable-shlib'
      ]
  
  if os in ['macosx']:
      options += [
          '--with-driver-usart=linux',
      ]
  
  if os in ['windows']:
      options += [
          '--with-driver-usart=windows',
      ]
      waf = ['python', '-x', 'waf']
  
  # Build
  waf += ['distclean', 'configure', 'build']
  print("Waf build command:", waf)
  subprocess.check_call(waf + options +
                        ['--with-rtable=cidr', '--disable-stlib', '--disable-output'])
  subprocess.check_call(waf + options + ['--enable-examples'])
  
subject: Remove --enable-qos