What version of protobuf and what language are you using?

Version: 4.22.1
Language: Python

What operating system (Linux, Windows, ...) and version?

OS: macOS (arm64)
Version: 13.3

What runtime / compiler are you using (e.g., python version or gcc version)

Python: 3.10.10
Compiler: Apple Clang 14.0.3

What did you do?

Steps to reproduce the behavior:

$ wget https://files.pythonhosted.org/packages/source/p/protobuf/protobuf-4.22.1.tar.gz
$ tar xzf protobuf-4.22.1.tar.gz 
$ cd protobuf-4.22.1/
$ python setup.py build --cpp_implementation

What did you expect to see

I expected to build the C++ implementation, as documented in the README. This used to work fine in protobuf 4.21.

What did you see instead?

The --cpp_implementation flag seems to no longer be valid:

usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

error: option --cpp_implementation not recognized

Anything else we should know about your project / environment

N/A