# <LANG>_INCLUDE_WHAT_YOU_USE

New in version 3.3.

This property is implemented only when `<LANG>` is `C` or `CXX`.

Specify a semicolon-separated list containing a command line for the `include-what-you-use` tool. The Makefile Generators and the `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 `CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE` variable if it is set when a target is created.