I have been looking into using vectorcall in [pyo3](https://github.com/PyO3/pyo3) (Rust bindings to Python) against python3.8.

It looks like the _PyObject_Vectorcall symbols are not included in the shared library. I've checked both Windows and Linux.

I think the `static inline` definition of `PyObject_Vectorcall` and related functions in `abstract.h` means that they won't be exported as symbols in the final library?

Yes. Can you use PyObject_Call instead (or one of the non-Vectorcall variants listed in https://docs.python.org/3.9/c-api/call.html#object-calling-api )

Vectorcall is mainly a speed optimization over PyObject_Call. We want to allow the C compiler to inline PyObject_Vectorcall whenever it is used.
That can be done with static functions or macros, which does unfortunately mean that the symbol is not exported.

I had suspected that might be the case. We already use PyObject_Call but had been hoping to experiment with the Vectorcall optimizations.

Without the symbols I might resort to reproducing the implementation of these functions on the Rust side. Shouldn't be too much code duplication.