It seems that the fix is still not perfect.

At the moment ( r73906 ), if you try to build trunk using Python 2.6,
you get:

> python setup.py build
running build
running build_ext
Traceback (most recent call last):
  File "setup.py", line 1901, in <module>
    main()
  File "setup.py", line 1896, in main
    'Lib/smtpd.py']
  File "/usr/lib/python2.6/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/usr/lib/python2.6/distutils/dist.py", line 975, in run_commands
    self.run_command(cmd)
  File "/usr/lib/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "/usr/lib/python2.6/distutils/command/build.py", line 135, in run
    self.run_command(cmd_name)
  File "/usr/lib/python2.6/distutils/cmd.py", line 333, in run_command
    self.distribution.run_command(command)
  File "/usr/lib/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "/usr/lib/python2.6/distutils/command/build_ext.py", line 345, in run
    self.build_extensions()
  File "setup.py", line 103, in build_extensions
    missing = self.detect_modules()
  File "setup.py", line 302, in detect_modules
    add_dir_to_list(self.compiler_obj.library_dirs, '/usr/local/lib')
  File "/usr/lib/python2.6/distutils/cmd.py", line 112, in __getattr__
    raise AttributeError, attr
AttributeError: compiler_obj