Fix cross-platform compilation using `distutils._msvccompiler.MSVCCom…

…piler`. Actually use the `plat_name` param in `MSVCCompiler.initialize`. Selective cherry-pick of pypa/distutils@a0339c1. Closes #4648.
pypa · Sep 15, 2024 · a56a8f9 · a56a8f9
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diff --git a/newsfragments/4648.bugfix.rst b/newsfragments/4648.bugfix.rst
@@ -0,0 +1 @@
+Fix cross-platform compilation using ``distutils._msvccompiler.MSVCCompiler`` -- by :user:`saschanaz` and :user:`Avasam`
diff --git a/setuptools/_distutils/_msvccompiler.py b/setuptools/_distutils/_msvccompiler.py
@@ -284,7 +284,7 @@ def initialize(self, plat_name=None):
                 f"--plat-name must be one of {tuple(_vcvars_names)}"
             )
 
-        plat_spec = _get_vcvars_spec(get_host_platform(), get_platform())
+        plat_spec = _get_vcvars_spec(get_host_platform(), plat_name)
 
         vc_env = _get_vc_env(plat_spec)
         if not vc_env:
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		@@ -0,0 +1 @@
		Fix cross-platform compilation using ``distutils._msvccompiler.MSVCCompiler`` -- by :user:`saschanaz` and :user:`Avasam`