_CPPLINT

From Get docs
Cmake/docs/3.21/prop tgt/lang cpplint


_CPPLINT

New in version 3.8.


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

Specify a semicolon-separated list containing a command line for the cpplint style checker. The Makefile Generators and the Ninja generator will run cpplint along with the compiler and report any problems.

This property is initialized by the value of the CMAKE__CPPLINT variable if it is set when a target is created.

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