_CLANG_TIDY

From Get docs
Cmake/docs/3.21/prop tgt/lang clang tidy


_CLANG_TIDY

New in version 3.6.


This property is implemented only when <LANG> is C, CXX, OBJC or OBJCXX.

Specify a semicolon-separated list containing a command line for the clang-tidy 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__CLANG_TIDY variable if it is set when a target is created.

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