CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE
Default value for <LANG>_INCLUDE_WHAT_YOU_USE target property. This variable is used to initialize the property on each target as it is created. This is done only when <LANG> is C or CXX.
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https://cmake.org/cmake/help/v3.9/variable/CMAKE_LANG_INCLUDE_WHAT_YOU_USE.html