old_contents: #! /usr/bin/env python
  """Generate C code for the jump table of the threaded code interpreter
  (for compilers supporting computed gotos or "labels-as-values", such as gcc).
  """
  
  import imp
  import os
  
  
  def find_module(modname):
      """Finds and returns a module in the local dist/checkout.
      """
      modpath = os.path.join(
          os.path.dirname(os.path.dirname(__file__)), "Lib")
      return imp.load_module(modname, *imp.find_module(modname, [modpath]))
  
  def write_contents(f):
      """Write C code contents to the target file object.
      """
      opcode = find_module("opcode")
      targets = ['_unknown_opcode'] * 256
      for opname, op in opcode.opmap.items():
          if opname == "STOP_CODE":
              # XXX opcode not implemented
              continue
          targets[op] = "TARGET_%s" % opname
      f.write("static void *opcode_targets[256] = {\n")
      f.write(",\n".join("\t&&%s" % s for s in targets))
      f.write("\n};\n")
  
  
  if __name__ == "__main__":
      import sys
      assert len(sys.argv) < 3, "Too many arguments"
      if len(sys.argv) == 2:
          target = sys.argv[1]
      else:
          target = "Python/opcode_targets.h"
      f = open(target, "w")
      try:
          write_contents(f)
      finally:
          f.close()
  
new_contents: #! /usr/bin/env python
  """Generate C code for the jump table of the threaded code interpreter
  (for compilers supporting computed gotos or "labels-as-values", such as gcc).
  """
  
  # This code should stay compatible with Python 2.3, at least while
  # some of the buildbots have Python 2.3 as their system Python.
  
  import imp
  import os
  
  
  def find_module(modname):
      """Finds and returns a module in the local dist/checkout.
      """
      modpath = os.path.join(
          os.path.dirname(os.path.dirname(__file__)), "Lib")
      return imp.load_module(modname, *imp.find_module(modname, [modpath]))
  
  def write_contents(f):
      """Write C code contents to the target file object.
      """
      opcode = find_module("opcode")
      targets = ['_unknown_opcode'] * 256
      for opname, op in opcode.opmap.items():
          if opname == "STOP_CODE":
              # XXX opcode not implemented
              continue
          targets[op] = "TARGET_%s" % opname
      f.write("static void *opcode_targets[256] = {\n")
      f.write(",\n".join(["\t&&%s" % s for s in targets]))
      f.write("\n};\n")
  
  
  if __name__ == "__main__":
      import sys
      assert len(sys.argv) < 3, "Too many arguments"
      if len(sys.argv) == 2:
          target = sys.argv[1]
      else:
          target = "Python/opcode_targets.h"
      f = open(target, "w")
      try:
          write_contents(f)
      finally:
          f.close()
  
subject: Make Python/makeopcodetargets runnable with Python 2.3. With any luck, this should solve the 'failed compile' on the x86 gentoo 3.x buildbot.