CMAKE_EXPORT_PACKAGE_REGISTRY

.. versionadded:: 3.15

Enables the :command:export(PACKAGE) command when :policy:CMP0090 is set to NEW.

The :command:export(PACKAGE) command does nothing by default. In some cases it is desirable to write to the user package registry, so the CMAKE_EXPORT_PACKAGE_REGISTRY variable may be set to enable it.

If :policy:CMP0090 is not set to NEW this variable does nothing, and the :variable:CMAKE_EXPORT_NO_PACKAGE_REGISTRY variable controls the behavior instead.

See also :ref:Disabling the Package Registry.