[BUG] msvc.py never checks `Microsoft.VisualStudio.Component.VC.Tools.arm64` and thus fails to detect MSVC

[saschanaz]

setuptools version

70.0.0

Python version

Python 3.12 aarch64

OS

Windows 11 aarch64

Additional environment information

VS2022 Build Tools with MSVC ARM64/ARM64EC option is installed.

> cl /?
Microsoft (R) C/C++ Optimizing Compiler Version 19.40.33813 for ARM64
Copyright (C) Microsoft Corporation.  All rights reserved.

> pip --version
pip 24.2 from C:\Users\sasch\AppData\Local\Programs\Python\Python312-arm64\Lib\site-packages\pip (python 3.12)

Description

Building psutil and zstandard fails on setuptools distutils exception: distutils.errors.DistutilsPlatformError: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/

Expected behavior

It should be able to detect ARM64 MSVC.

How to Reproduce

pip install zstandard

... which effectively does:

from setuptools._distutils import ccompiler
compiler = ccompiler.new_compiler()
compiler.initialize()

Output

        [33 lines of output]
        Traceback (most recent call last):
          File "D:\gecko\third_party\python\pip\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 353, in <module>
            main()
          File "D:\gecko\third_party\python\pip\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 335, in main
            json_out['return_val'] = hook(**hook_input['kwargs'])
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          File "D:\gecko\third_party\python\pip\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 118, in get_requires_for_build_wheel
            return hook(config_settings)
                   ^^^^^^^^^^^^^^^^^^^^^
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\build_meta.py", line 327, in get_requires_for_build_wheel
            return self._get_build_requires(config_settings, requirements=[])
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\build_meta.py", line 297, in _get_build_requires
            self.run_setup()
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\build_meta.py", line 313, in run_setup
            exec(code, locals())
          File "<string>", line 126, in <module>
          File "<string>", line 105, in uses_msvc
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\_distutils\command\config.py", line 220, in try_compile
            self._compile(body, headers, include_dirs, lang)
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\_distutils\command\config.py", line 132, in _compile
            self.compiler.compile([src], include_dirs=include_dirs)
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\_distutils\_msvccompiler.py", line 343, in compile
            self.initialize()
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\_distutils\_msvccompiler.py", line 253, in initialize
            vc_env = _get_vc_env(plat_spec)
                     ^^^^^^^^^^^^^^^^^^^^^^
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\msvc.py", line 233, in msvc14_get_vc_env
            return _msvc14_get_vc_env(plat_spec)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          File "C:\Users\sasch\AppData\Local\Temp\pip-build-env-f6yfun9m\overlay\Lib\site-packages\setuptools\msvc.py", line 190, in _msvc14_get_vc_env
            raise distutils.errors.DistutilsPlatformError("Unable to find vcvarsall.bat")
        distutils.errors.DistutilsPlatformError: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
        [end of output]

... or with the minimal repro:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\sasch\AppData\Local\Programs\Python\Python312-arm64\Lib\site-packages\setuptools\_distutils\_msvccompiler.py", line 253, in initialize
    vc_env = _get_vc_env(plat_spec)
             ^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\sasch\AppData\Local\Programs\Python\Python312-arm64\Lib\site-packages\setuptools\msvc.py", line 233, in msvc14_get_vc_env
    return _msvc14_get_vc_env(plat_spec)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\sasch\AppData\Local\Programs\Python\Python312-arm64\Lib\site-packages\setuptools\msvc.py", line 190, in _msvc14_get_vc_env
    raise distutils.errors.DistutilsPlatformError("Unable to find vcvarsall.bat")
distutils.errors.DistutilsPlatformError: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/