Issue #28046: Remove platform-specific directories from sys.path

Lib/sysconfig.py

@@ -341,6 +341,15 @@ def get_makefile_filename():
         config_dir_name += '-%s' % sys.implementation._multiarch
     return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile')
 
+
+def _get_sysconfigdata_name():
+    return '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
+        abi=sys.abiflags,
+        platform=sys.platform,
+        multiarch=getattr(sys.implementation, '_multiarch', ''),
+    )
+
+
 def _generate_posix_vars():
     """Generate the Python module containing build-time variables."""
     import pprint
@@ -381,7 +390,7 @@ def _generate_posix_vars():
     # _sysconfigdata module manually and populate it with the build vars.
     # This is more than sufficient for ensuring the subsequent call to
     # get_platform() succeeds.
-    name = '_sysconfigdata_' + sys.abiflags
+    name = _get_sysconfigdata_name()
     if 'darwin' in sys.platform:
         import types
         module = types.ModuleType(name)
@@ -407,7 +416,7 @@ def _generate_posix_vars():
 def _init_posix(vars):
     """Initialize the module as appropriate for POSIX systems."""
     # _sysconfigdata is generated at build time, see _generate_posix_vars()
-    name = '_sysconfigdata_' + sys.abiflags
+    name = _get_sysconfigdata_name()
     _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
     build_time_vars = _temp.build_time_vars
     vars.update(build_time_vars)