[Cython] Cython 0.16 issue Windows with Mingw32

Stefan Behnel stefan_ml at behnel.de
Tue Apr 24 14:43:43 CEST 2012

Nathan Dunfield, 24.04.2012 14:22:
> On Apr 23, 2012, at 1:28 PM, Stefan Behnel wrote:
>> Hmm, that line basically just says "PyCFunction_Call", which is a
>> function exported by CPython. I wonder why gcc would consider this
>> "not a constant".
>> Could you check if the preprocessor (gcc -E, with all the above
>> includes) also sees that on your side?
> It turns out I was running a version of MinGW that, while only a few
> years old, had a quite elderly version of gcc, namely 3.4 (yes, that's
> 3.4 and not 4.3).   Once I updated to the most recent MinGW, which has
> gcc 4.6, and worked around a known bug in distutils (
> http://bugs.python.org/issue12641 ), the issue with PyCFunction_Call
> went away and the entire 76k line Cython generated C file compiled
> without a hitch.  So probably this is only a problem on very old
> compilers, and so perhaps not worth investigating further.

Thanks for reporting this back. Given that this is "only" MinGW, which
requires some work on user side anyway to get it properly installed and
used by Python builds, I agree that we can expect those who use it to also
be able to install a somewhat recent version if they run into this.

After all, gcc4.x is very likely to produce faster code for recent
processors than gcc 3.4, so upgrading is a way better alternative than just
"making it work" on our side.


More information about the cython-devel mailing list