ADDITIONAL_CLEAN_FILES
----------------------

.. versionadded:: 3.15

A :ref:`semicolon-separated list <CMake Language Lists>` of files or
directories that will be removed as a part of the global ``clean`` target.
It is useful for specifying generated files or directories that are used by
multiple targets or by CMake itself, or that are generated in ways which cannot
be captured as outputs or byproducts of custom commands.

If an additional clean file is specific to a single target only, then the
:prop_tgt:`ADDITIONAL_CLEAN_FILES` target property would usually be a better
choice than this directory property.

Relative paths are allowed and are interpreted relative to the
current binary directory.

Contents of ``ADDITIONAL_CLEAN_FILES`` may use
:manual:`generator expressions <cmake-generator-expressions(7)>`.

This property only works for the :generator:`Ninja` and the Makefile
generators.  It is ignored by other generators.
