Issue #8589: Decode PYTHONWARNINGS environment variable with the file system
encoding and surrogateespace error handler instead of the locale encoding to be
consistent with os.environ. Add PySys_AddWarnOptionUnicode() function.
diff --git a/Doc/c-api/sys.rst b/Doc/c-api/sys.rst
index adadfe5..bc4cbae 100644
--- a/Doc/c-api/sys.rst
+++ b/Doc/c-api/sys.rst
@@ -81,6 +81,10 @@
Append *s* to :data:`sys.warnoptions`.
+.. cfunction:: void PySys_AddWarnOptionUnicode(PyObject *unicode)
+
+ Append *unicode* to :data:`sys.warnoptions`.
+
.. cfunction:: void PySys_SetPath(wchar_t *path)
Set :data:`sys.path` to a list object of paths found in *path* which should