| CMAKE_POLICY_DEFAULT_CMP<NNNN> |
| ------------------------------ |
| |
| Default for CMake Policy ``CMP<NNNN>`` when it is otherwise left unset. |
| |
| Commands :command:`cmake_minimum_required(VERSION)` and |
| :command:`cmake_policy(VERSION)` by default leave policies introduced after |
| the given version unset. Set ``CMAKE_POLICY_DEFAULT_CMP<NNNN>`` to ``OLD`` |
| or ``NEW`` to specify the default for policy ``CMP<NNNN>``, where ``<NNNN>`` |
| is the policy number. |
| |
| This variable should not be set by a project in CMake code as a way to |
| set its own policies; use :command:`cmake_policy(SET)` instead. This |
| variable is meant to externally set policies for which a project has |
| not itself been updated: |
| |
| * Users running CMake may set this variable in the cache |
| (e.g. ``-DCMAKE_POLICY_DEFAULT_CMP<NNNN>=<OLD|NEW>``). Set it to ``OLD`` |
| to quiet a policy warning while using old behavior or to ``NEW`` to |
| try building the project with new behavior. |
| |
| * Projects may set this variable before a call to :command:`add_subdirectory` |
| that adds a third-party project in order to set its policies without |
| modifying third-party code. |