Hi All,
trying to build postgresql 12.X with python3 interface, I hit an
interesting issue
all headers
/usr/include/python{3.6-3.8}/pyport.h
are including
# if defined(__CYGWIN__)
# define PyMODINIT_FUNC
__declspec(dllexport) PyObject*
# else /* __CYGWIN__ */
# define PyMODINIT_FUNC PyObject*
# endif /* __CYGWIN__ */
and the postgresql python 3 interface has in the code and the header
src/pl/plpython/plpy_plpymodule.{h,c}
the following lines:
PyMODINIT_FUNC PyInit_plpy(void);
PyMODINIT_FUNC PyInit_plpy(void)...
Unfortunately the shared lib produced is crippled and does not
export correctly the symbols.
Changing the lines in
extern PyObject* PyInit_plpy(void);
PyObject* PyInit_plpy(void)..
solves the problem and pass all tests.
At first glance the Python headers seem the wrong one; the postgresql
code has no special CYGWIN handling in that point, just the note
* Must have external linkage, because PyMODINIT_FUNC does dllexport on
* Windows-like platforms.
Comments ?
Any one seeing similar issue with Python3 code ?
For what I see the usage of PyMODINIT_FUNC is very limited
only python-cffi and python-lxml seem to use it in their headers
Regards
Marco
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