LINK_WITH_PYTHON issue on windows

[jmarrec]

Issue overview

I have a build error on windows. I've tried with both python 3.8 and 3.9.

find_package(PythonLibs 3 REQUIRED) outputs this:

Found PythonLibs: optimized;C:/Python38/libs/python38.lib;debug;C:/Python38/libs/python38_d.lib (found suitable version "3.8.6", minimum required is "3")

As a result, PythonGetLibAndLinkUp is called with the

 RESOLVED_PYTHON_LIB=C:/Users/julien/Software/Others/EnergyPlus/src/EnergyPlus/optimized;C:/Python38/libs/python38.lib;debug;C:/Python38/libs/python38_d.lib

so in PythonGetLibAndLinkUp it'll try to copy and install the non existing C:/Users/julien/Software/Others/EnergyPlus/src/EnergyPlus/optimized. So the resulting package is broken since it's missing the Python DLL.

I would very much recommend we actually stop using the deprecated FindPythonInterp / FindPythonLibs (deprecated since cmake 3.12) and move to the more modern

Details

Some additional details for this issue (if relevant):

>cmake --version
cmake version 3.20.0

Tested with pythons:

Python 3.9.5 (tags/v3.9.5:0a7dcbd, May  3 2021, 17:27:52) [MSC v.1928 64 bit (AMD64)] on win32
Python 3.8.6 (tags/v3.8.6:db45529, Sep 23 2020, 15:52:53) [MSC v.1927 64 bit (AMD64)] on win32

• Version of EnergyPlus (if using an intermediate build, include SHA): develop, b9b6636

Checklist

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[jmarrec]

I'm pretty sure that the reason I'm getting problem is because I explicitly installed the DEBUG libraries when I installed Python, so cmake finds both.