CMAKE_FIND_USE_PACKAGE_REGISTRY
-------------------------------

Controls the searching the :ref:`User 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_PACKAGE_REGISTRY`
variable.  If that is also not set, then `find_package()` will use the
`User Package Registry` unless the `NO_CMAKE_PACKAGE_REGISTRY` option
is provided.

This variable takes precedence over :variable:`CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY`
when both are set.

In some cases, for example to locate only system wide installations, it
is not desirable to use the :ref:`User Package Registry` when searching
for packages. If the :variable:`CMAKE_FIND_USE_PACKAGE_REGISTRY`
variable is ``FALSE``, all the :command:`find_package` commands will skip
the :ref:`User Package Registry` as if they were called with the
``NO_CMAKE_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_CMAKE_SYSTEM_PATH`,
:variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH`,
and :variable:`CMAKE_FIND_USE_PACKAGE_ROOT_PATH` variables.
