CMAKE_PROJECT__INCLUDE
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Cmake/docs/3.21/variable/cmake project project-name include
CMAKE_PROJECT__INCLUDE
A CMake language file or module to be included as the last step of any project() command calls that specify <PROJECT-NAME>
as the project name. This is intended for injecting custom code into project builds without modifying their source.
See also the CMAKE_PROJECT__INCLUDE_BEFORE, CMAKE_PROJECT_INCLUDE and CMAKE_PROJECT_INCLUDE_BEFORE variables.
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https://cmake.org/cmake/help/v3.21/variable/CMAKE_PROJECT_PROJECT-NAME_INCLUDE.html