[Cython] cython 0.15 breaks callback code.

[Brett Calcott]

Hi. I've just reverted to 0.14.1 because 0.15 breaks code that implements a
cpp callback in python. It seems to be a name-mangling problem.

I've attached a short test case that shows the problem. They both compile
fine on 14.1 and 15. But if I try and run the 15 compiled version I get
this:

Traceback (most recent call last):
  File "try_hello.py", line 1, in <module>
    import test
ImportError:
dlopen(/Users/brett/Dropbox/Code/kli-project/cython-test/test.so, 2): Symbol
not found: __Z19callback_test_helloP7_objecti
  Referenced from: /Users/brett/Dropbox/Code/kli-project/cython-test/test.so
  Expected in: dynamic lookup

Is there anything new I should be doing?

Brett
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