CMAKE_WARN_DEPRECATED
---------------------

Whether to issue warnings for deprecated functionality.

If not ``FALSE``, use of deprecated functionality will issue warnings.
If this variable is not set, CMake behaves as if it were set to ``TRUE``.

When running :manual:`cmake(1)`, this option can be enabled with the
``-Wdeprecated`` option, or disabled with the ``-Wno-deprecated`` option.