CMake/Help/policy/CMP0001.rst
2019-03-27 16:01:20 +01:00

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CMP0001
-------
``CMAKE_BACKWARDS_COMPATIBILITY`` should no longer be used.
The behavior is to check ``CMAKE_BACKWARDS_COMPATIBILITY`` and present
it to the user. The ``NEW`` behavior is to ignore
CMAKE_BACKWARDS_COMPATIBILITY completely.
In CMake 2.4 and below the variable ``CMAKE_BACKWARDS_COMPATIBILITY`` was
used to request compatibility with earlier versions of CMake. In
CMake 2.6 and above all compatibility issues are handled by policies
and the :command:`cmake_policy` command. However, CMake must still check
``CMAKE_BACKWARDS_COMPATIBILITY`` for projects written for CMake 2.4 and
below.
This policy was introduced in CMake version 2.6.0. CMake version
|release| warns when the policy is not set and uses ``OLD`` behavior. Use
the :command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
.. include:: DEPRECATED.txt