Default for CMake Policy
CMP<NNNN> when it is otherwise left unset.
Commands cmake_minimum_required(VERSION) and cmake_policy(VERSION) by default leave policies introduced after the given version unset. Set
NEW to specify the default for policy
<NNNN> is the policy number.
This variable should not be set by a project in CMake code; use cmake_policy(SET) instead. Users running CMake may set this variable in the cache (e.g.
-DCMAKE_POLICY_DEFAULT_CMP<NNNN>=<OLD|NEW>) to set a policy not otherwise set by the project. Set to
OLD to quiet a policy warning while using old behavior or to
NEW to try building the project with new behavior.