matplotlib/matplotlib — pull request #3492 by mdboom (2014-09-16 15:46:55+00:00)
Title: Allow python 3 version of PyCXX

setupext.py is hard-coded to not use an external version of PyCXX with python 3 (starting with line 831 in master), claiming that "There is no version of PyCXX in the wild that will work with Python 3.x". This is no longer the case, PyCXX is compatible with python 3.