<LANG>_INCLUDE_WHAT_YOU_USE --------------------------- This property is implemented only when ``<LANG>`` is ``C`` or ``CXX``. Specify a :ref:`;-list <CMake Language Lists>` containing a command line for the ``include-what-you-use`` tool. The :ref:`Makefile Generators` and the :generator:`Ninja` generator will run this tool along with the compiler and report a warning if the tool reports any problems. This property is initialized by the value of the :variable:`CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE` variable if it is set when a target is created.