python-cython C++ support patch

[Marco Atzeri]

On 29.01.2021 11:31, Masamichi Hosoda wrote:
> Hi,
> 
> I've found that modules built by python-cython with C++ could not be loaded.
> If I understand correctly, the following patch fixes it.
> Would you like to apply this patch to the package?
> 
> ```
> --- a/Cython-0.29.21/Cython/Utility/ModuleSetupCode.c
> +++ b/Cython-0.29.21/Cython/Utility/ModuleSetupCode.c
> @@ -709,7 +709,11 @@
>   /////////////// PyModInitFuncType.proto ///////////////
>   
>   #ifndef CYTHON_NO_PYINIT_EXPORT
> +#ifdef __cplusplus
> +#define __Pyx_PyMODINIT_FUNC  extern "C" PyObject *
> +#else
>   #define __Pyx_PyMODINIT_FUNC  PyObject *
> +#endif
>   
>   #elif PY_MAJOR_VERSION < 3
>   // Py2: define this to void manually because PyMODINIT_FUNC adds __declspec(dllexport) to it's definition.
> ```
> 
> Thanks.

Thanks Masamichi,

it seems in line with similar patches that I have applied to some
other python sub packages

Have you a test case for this one ?

I will look to rebuilt python-cython after some extra check

Marco