Documentation says : "So, on Windows systems, when Python3_FIND_ABI is defined, Python distributions from python.org will be found only if value for each flag is OFF or ANY." I tried to implement a workaround because I need to have pydebug to use pybind11 in Debug mode : [Windows Python with Debug Libraries Installed causes linker error](https://github.com/pybind/pybind11/issues/3403) List of problems I found : - If I set `Python3_FIND_ABI(ON ANY ANY)`, `Python3_FIND_UNVERSIONED_NAMES` search `python` instead of `pythond` / `python_d`. - `sys.abiflags` doesn't work for Windows. So don't try to read `sys.abiflags` to check if an interpreter is good. Also don't update `Python3_ABIFLAGS` when interpreter has been checked. - `Changed in version 3.8: Default flags became an empty string (m flag for pymalloc has been removed). ` [System-specific parameters and functions](https://docs.python.org/3/library/sys.html). I didn't do any change about this change.