How to pass former --install-option flags via --config-settings since pip 23.1?

[cacti77]

Description

I don't know if this is a bug or just a question....

Prior to pip 23.1 (e.g., 23.0.1) I was able to install my custom Python package with C++ extensions successfully on Windows using:

pip install --install-option=build_ext --install-option="--library-dirs=/path/to/library" *.zip

But the --install-option flag was removed in pip 23.1 via #11858. So how do I now specify --install-option flags (such as --library-dirs) via --config-settings (or --config-setting) please?

I also asked this on SO here, but have got no answer yet.

Expected behavior

If this is possible with pip 23.1, please consider expanding on the docs for --config-settings at https://pip.pypa.io/en/stable/cli/pip_install/#cmdoption-C, or in the Examples section below.

pip version

23.1.2

Python version

3.7, 3.8

OS

Windows

How to Reproduce

1. Install pip 23.1 (e.g., in a Python 3.7 or 3.8 virtual environment created with venv.)
2. Try pip install of a source archive on Windows, attempting to pass in any former --install-option flag via --config-settings. E.g., --library-dirs or --libraries.

Output

Successful installation of a Python package from a source archive.

Code of Conduct

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