_INCLUDE_WHAT_YOU_USE

From Get docs
Cmake/docs/3.21/prop tgt/lang include what you use


_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__INCLUDE_WHAT_YOU_USE variable if it is set when a target is created.

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https://cmake.org/cmake/help/v3.21/prop_tgt/LANG_INCLUDE_WHAT_YOU_USE.html