[Cmake-commits] CMake branch, next, updated. v2.8.12-4165-g117ba09

[Brad King]

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- Log -----------------------------------------------------------------
http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=117ba09f1076ea0a1c48e4cbbb46c4960b3367b6
commit 117ba09f1076ea0a1c48e4cbbb46c4960b3367b6
Merge: ec54881 6d50d01
Author:     Brad King <brad.king at kitware.com>
AuthorDate: Fri Oct 18 14:24:09 2013 -0400
Commit:     CMake Topic Stage <kwrobot at kitware.com>
CommitDate: Fri Oct 18 14:24:09 2013 -0400

    Merge topic 'policies-generic-docs' into next
    
    6d50d01 Help: Add introduction section to cmake-policies manual


http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=6d50d0197a50680466c075feeda338b3b9418e05
commit 6d50d0197a50680466c075feeda338b3b9418e05
Author:     Stephen Kelly <steveire at gmail.com>
AuthorDate: Fri Oct 18 19:22:09 2013 +0200
Commit:     Brad King <brad.king at kitware.com>
CommitDate: Fri Oct 18 14:23:28 2013 -0400

    Help: Add introduction section to cmake-policies manual
    
    Explain the concept behind policies.

diff --git a/Help/manual/cmake-policies.7.rst b/Help/manual/cmake-policies.7.rst
index 658620f..4fcc90b 100644
--- a/Help/manual/cmake-policies.7.rst
+++ b/Help/manual/cmake-policies.7.rst
@@ -5,6 +5,26 @@ cmake-policies(7)
 
    .. contents::
 
+Introduction
+============
+
+Policies in CMake are used to preserve backward compatible behavior
+across multiple releases.  When a new policy is introduced, newer CMake
+versions will begin to warn about the backward compatible behavior.  It
+is possible to disable the warning by explicitly requesting the OLD, or
+backward compatible behavior using the :command:`cmake_policy` command.
+It is also possible to request NEW, or non-backward compatible behavior
+for a policy, also avoiding the warning.
+
+The :command:`cmake_minimum_required` command does more than report an
+error if a too-old version of CMake is used to build a project.  It
+also sets all policies introduced in that CMake version or earlier to
+NEW behavior.
+
+The :variable:`CMAKE_MINIMUM_REQUIRED_VERSION` variable may also be used
+to determine whether to report an error on use of deprecated macros or
+functions.
+
 All Policies
 ============
 

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