ipython/ipython — pull request #1804 by dhirschfeld (2012-05-31 12:47:35+00:00)
Title: Fixed a vcvarsall.bat error on win32/Py2.7 when trying to compile with mingw.

This is the same error as cython pull request 129.

https://github.com/cython/cython/pull/129

This makes `%cython` also work for me but the cython devs have yet to confirm that this is the correct fix.