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CMAKE_POLICY_VERSION_MINIMUM
----------------------------
.. versionadded:: 4.0
Specify a minimum :ref:`Policy Version` for a project without modifying
its calls to :command:`cmake_minimum_required(VERSION)` and
:command:`cmake_policy(VERSION)`.
This variable should not be set by a project in CMake code as a way to
set its own policy version. Use :command:`cmake_minimum_required(VERSION)`
and/or :command:`cmake_policy(VERSION)` for that. 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_VERSION_MINIMUM=3.5``, to try configuring a project
that has not been updated to set at least that policy version itself.
Alternatively, users may set the :envvar:`CMAKE_POLICY_VERSION_MINIMUM`
environment variable to initialize the cache entry in new build trees
automatically.
* Projects may set this variable before a call to :command:`add_subdirectory`
that adds a third-party project in order to set its policy version without
modifying third-party code.
See :variable:`CMAKE_POLICY_DEFAULT_CMP<NNNN>` to set individual policies.
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