Issue #5501: Clarify that invoking freeze_support() on non-Windows platforms has no effect
Patch by Davin Potts and Camilla Montonen.
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index 8575fb5..e369e2b 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -901,8 +901,10 @@
If the ``freeze_support()`` line is omitted then trying to run the frozen
executable will raise :exc:`RuntimeError`.
- If the module is being run normally by the Python interpreter then
- :func:`freeze_support` has no effect.
+ Calling ``freeze_support()`` has no effect when invoked on any operating
+ system other than Windows. In addition, if the module is being run
+ normally by the Python interpreter on Windows (the program has not been
+ frozen), then ``freeze_support()`` has no effect.
.. function:: get_all_start_methods()