CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY -------------------------------------- .. versionadded:: 3.16 Controls searching the :ref:`System Package Registry` by the :command:`find_package` command. By default this variable is not set and the behavior will fall back to that determined by the deprecated :variable:`CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY` variable. If that is also not set, then :command:`find_package()` will use the :ref:`System Package Registry` unless the ``NO_CMAKE_SYSTEM_PACKAGE_REGISTRY`` option is provided. This variable takes precedence over :variable:`CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY` when both are set. In some cases, for example to locate only user specific installations, it is not desirable to use the :ref:`System Package Registry` when searching for packages. If the ``CMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY`` variable is ``FALSE``, all the :command:`find_package` commands will skip the :ref:`System Package Registry` as if they were called with the ``NO_CMAKE_SYSTEM_PACKAGE_REGISTRY`` argument. See also :ref:`Disabling the Package Registry`. See also the :variable:`CMAKE_FIND_USE_CMAKE_PATH`, :variable:`CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH`, :variable:`CMAKE_FIND_USE_INSTALL_PREFIX`, :variable:`CMAKE_FIND_USE_CMAKE_SYSTEM_PATH`, :variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH`, :variable:`CMAKE_FIND_USE_PACKAGE_REGISTRY`, and :variable:`CMAKE_FIND_USE_PACKAGE_ROOT_PATH` variables.
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