Catch warnings in stdlib

Author: XuehaiPan

Lib/sysconfig/__init__.py

@@ -325,6 +325,7 @@ def get_default_scheme():
 
 def get_makefile_filename():
     """Return the path of the Makefile."""
+    import warnings
 
     # GH-127429: When cross-compiling, use the Makefile from the target, instead of the host Python.
     if cross_base := os.environ.get('_PYTHON_PROJECT_BASE'):
@@ -333,7 +334,11 @@ def get_makefile_filename():
     if _PYTHON_BUILD:
         return os.path.join(_PROJECT_BASE, "Makefile")
 
-    if hasattr(sys, 'abiflags'):
+    with warnings.catch_warnings():
+        warnings.simplefilter('ignore', DeprecationWarning)
+        has_abiflags = hasattr(sys, 'abiflags')
+
+    if has_abiflags:
         config_dir_name = f'config-{_PY_VERSION_SHORT}{sys.abiflags}'
     else:
         config_dir_name = 'config'