[Cython] Cython 0.16 issue Windows with Mingw32

Stefan Behnel stefan_ml at behnel.de
Mon Apr 23 20:28:47 CEST 2012

Nathan Dunfield, 23.04.2012 17:58:
> I've encountered the following issue with Cython 0.16 on Windows with
> using the Mingw32 compiler (I'm using Python 3.2 here, but I don't think
> that's the issue):
> $ python3 setup.py build -c mingw32
> running build
> running build_py
> running build_ext
> skipping 'SnapPy.c' Cython extension (up-to-date)
> building 'snappy.SnapPy' extension
> c:\MinGW\bin\gcc.exe -mno-cygwin -mdll -O -Wall -Iheaders -Iunix_kit -Iaddl_code -I. -Ipari/pari-2.3.4/include/ -Ipari/pari-2.3.4/include/pari -Ic:\Python32\include -Ic:\Python32\PC -c SnapPy.c -o build\temp.win32-3.2\Release\snappy.o
> SnapPy.c: In function `__pyx_f_6snappy_6SnapPy_13Triangulation_build_rep_into_Sn':
> SnapPy.c:25187: warning: implicit declaration of function `fg_get_num_orig_gens'
> SnapPy.c:25423: warning: implicit declaration of function `candidateSn_is_valid'
> SnapPy.c:25435: warning: implicit declaration of function `candidateSn_is_transitive'
> SnapPy.c: At top level:
> SnapPy.c:76434: error: initializer element is not constant
> SnapPy.c:76434: error: (near initialization for `__pyx_CyFunctionType_type.tp_call')
> error: command 'gcc' failed with exit status 1

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?


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