The script can be run locally by providing the compiler output file

(where the output is saved) and the compiler output type

(either ``json`` or ``clang``) to see a list of unique warnings::

(either ``gcc`` or ``clang``) to see a list of unique warnings::

..note::The ``-fdiagnostics-format=json`` flag is required when compiling with GCC

for the script to properly parse the compiler output.

.. _warning-check-failure:

* Document in the PR that the change reduces the number of compiler

warnings. Decrement the count in the platform-specific warning

ignore file or remove the file if the count is now zero.

.. _updating-warning-ignore-file:

Updating the warning ignore file

The warning ignore files can be found in the:cpy-file:`Tools/build/` directory.

Both files and directories can be added to the ignore file. Files can have an explicit warning count or a wildcard count.

Directories must be followed by a wildcard count. Wildcards indicate that 0 or more warnings will be ignored.

The following is an example of the warning ignore file format::

Using wildcards is reserved for code that is not maintained by CPython, or code that is for tests.

Keep lines in warning ignore files sorted lexicographically.