1CMP0048
2-------
3
4The :command:`project` command manages ``VERSION`` variables.
5
6CMake version 3.0 introduced the ``VERSION`` option of the :command:`project`
7command to specify a project version as well as the name.  In order to keep
8:variable:`PROJECT_VERSION` and related variables consistent with variable
9:variable:`PROJECT_NAME` it is necessary to set the ``VERSION`` variables
10to the empty string when no ``VERSION`` is given to :command:`project`.
11However, this can change behavior for existing projects that set ``VERSION``
12variables themselves since :command:`project` may now clear them.
13This policy controls the behavior for compatibility with such projects.
14
15The ``OLD`` behavior for this policy is to leave ``VERSION`` variables untouched.
16The ``NEW`` behavior for this policy is to set ``VERSION`` as documented by the
17:command:`project` command.
18
19This policy was introduced in CMake version 3.0.
20CMake version |release| warns when the policy is not set and uses
21``OLD`` behavior.  Use the :command:`cmake_policy` command to set
22it to ``OLD`` or ``NEW`` explicitly.
23
24.. include:: DEPRECATED.txt
25