_ROOT ------------------ Calls to :command:`find_package()` will search in prefixes specified by the ``_ROOT`` CMake variable, where ```` is the name given to the :command:`find_package` call and ``_ROOT`` is literal. For example, ``find_package(Foo)`` will search prefixes specified in the ``Foo_ROOT`` CMake variable (if set). See policy :policy:`CMP0074`. This variable may hold a single prefix or a :ref:`semicolon-separated list ` of multiple prefixes. See also the :envvar:`_ROOT` environment variable.