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authorVince Harron <vharron@google.com>2015-06-02 18:37:41 -0700
committerVince Harron <vharron@google.com>2015-06-02 18:37:41 -0700
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+CMP0048
+-------
+
+The :command:`project` command manages VERSION variables.
+
+CMake version 3.0 introduced the ``VERSION`` option of the :command:`project`
+command to specify a project version as well as the name. In order to keep
+:variable:`PROJECT_VERSION` and related variables consistent with variable
+:variable:`PROJECT_NAME` it is necessary to set the VERSION variables
+to the empty string when no ``VERSION`` is given to :command:`project`.
+However, this can change behavior for existing projects that set VERSION
+variables themselves since :command:`project` may now clear them.
+This policy controls the behavior for compatibility with such projects.
+
+The OLD behavior for this policy is to leave VERSION variables untouched.
+The NEW behavior for this policy is to set VERSION as documented by the
+:command:`project` command.
+
+This policy was introduced in CMake version 3.0.
+CMake version |release| warns when the policy is not set and uses
+OLD behavior. Use the cmake_policy command to set it to OLD or
+NEW explicitly.