Convert `_sysconfigdata` to a JSON file

Feature or enhancement

Proposal:

Currently, as part of the sysconfig internals, we generate a _sysconfigdata Python module containing the variables for sysconfig.get_config_vars(). This data is consists of all Makefile variables, which can be encoded as JSON data.

The use of a module instead of a text file is historic, and adds unnecessary complexity. Converting _sysconfigdata to a JSON file would simplify the sysconfig implementation. Additionally, it also makes it easier for tools to introspect the Python installation, as this would remove the necessity to execute Python code to read _sysconfigdata.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-127180
• gh-127302
• gh-128558

先阅读生成和使用 Python 模块 _sysconfigdata 的 sysconfig 内部实现，然后查看相关的 PR gh-127180、gh-127302 和 gh-128558。完成的标准是：配置数据以 JSON 表示，sysconfig.get_config_vars() 仍然可用，并且工具可以在不执行 Python 代码的情况下检查安装内容。