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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
/*!
\page qt-policy.html
\ingroup cmake-commands-qtcore
\title qt_policy
\keyword qt6_policy
\summary {Modify the default behavior of Qt's CMake API.}
\include cmake-find-package-core.qdocinc
\cmakecommandsince 6.5
\section1 Synopsis
\badcode
qt_policy(
[SET <policy_name> behavior]
[GET <policy_name> <variable>]
)
\endcode
\versionlessCMakeCommandsNote qt6_policy()
\section1 Description
This command has two modes:
\list
\li When the \c{SET} keyword is used, this command can be used to opt in to
behavior changes in Qt's CMake API, or to explicitly opt out of them.
\li When the \c{GET} keyword is used, \c{<variable>} is set to the current
behavior for the policy, i.e. \c OLD or \c NEW.
\endlist
\c{<policy_name>} must be the name of one of the \l{Qt CMake policies}.
Policy names have the form of \c{QTP<NNNN>} where <NNNN> is
an integer specifying the index of the policy. Using an invalid policy
name results in an error.
Code supporting older Qt versions can check the existence of a policy by
checking the value of the \c{QT_KNOWN_POLICY_<policy_name>} variable before
getting the value of \c <policy_name> or setting its behavior.
\badcode
if(QT_KNOWN_POLICY_<policy_name>)
qt_policy(SET <policy_name> NEW)
endif()
\endcode
You can set \c behavior to one of the following options:
\list
\li \c{NEW} to opt into the new behavior
\li \c{OLD} to explicitly opt-out of it
\endlist
\qtpolicydeprecatedbehavior
\sa qt_standard_project_setup
*/
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