2011/12/13 David Naylor <naylor.b.david@gmail.com>
Does pypy-1.7 support translating to the CLI backend?
[...] 
[translation:ERROR]    File "/pypy/rpython/ootypesystem/ootype.py", line 1297, in _check_overloadings
[translation:ERROR]     raise TypeError, 'Bad overloading'
[translation:ERROR]  TypeError: Bad overloading

This particular error occurs on 64bit architecture (where long == longlong)
It seems that the CLI backend is not yet ready for 64bit.
This is probably not too difficult to fix, patches are welcome!

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Amaury Forgeot d'Arc