[BUG] Error formatting error message in bdist_wheel on Windows

[ngoldbaum]

setuptools version

75.8.0

Python version

3.13t

OS

Windows

Additional environment information

No response

Description

sys.abiflags is not defined on Windows, so this error message leads to a crash instead of a useful error there:

setuptools/setuptools/command/bdist_wheel.py

Line 297 in fb7f3d3

f"`Py_GIL_DISABLED` ({sys.abiflags=!r}). "

Expected behavior

An error telling me to not set Py_LIMITED_API

How to Reproduce

I think you can hit this doing setup.py bdist_wheel with a free-threaded Python on Windows. I hit it trying to build wheels for bcrypt.

See this CI run: https://github.com/ngoldbaum/bcrypt/actions/runs/12818690186/job/35744737249#step:7:100

Output

    File "C:\hostedtoolcache\windows\Python\3.13.1\x64-freethreaded\Lib\site-packages\setuptools\command\bdist_wheel.py", line 297, in _validate_py_limited_api
      f"`Py_GIL_DISABLED` ({sys.abiflags=!r}). "
                            ^^^^^^^^^^^^
  AttributeError: module 'sys' has no attribute 'abiflags'