CMAKE_SYSTEM_INCLUDE_PATH

:ref:Semicolon-separated list <CMake Language Lists> of directories specifying a search path for the :command:find_file and :command:find_path commands. By default this contains the standard directories for the current system. It is not intended to be modified by the project; use :variable:CMAKE_INCLUDE_PATH for this. See also :variable:CMAKE_SYSTEM_PREFIX_PATH.