"gen-make.py --debug" with Python 3 fails with TypeError

Running "gen-make.py --debug" with Python 3 fails with:

[[[
Traceback (most recent call last):
  File "gen-make.py", line 326, in <module>
    main(conf, gentype, skip_depends=skip, other_options=rest.list)
  File "gen-make.py", line 73, in main
    sorted_targets = list(target_dict.keys()); sorted_targets.sort()
TypeError: '<' not supported between instances of 'ObjectFile' and
'ObjectFile'
]]]

-- 
Johan