Add a "shim" to allow use of Clang 5's __builtin_available everywhere

This is mostly relevant for Apple platforms, where we can use the new
unguarded availability warnings to guarantee that proper version checks
are present when using APIs that are not necessarily available on the
deployment target.

Change-Id: Ie408704b2924e1220491a9ea30f0141dfa4867d9
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry-picked from 70422449ef892d7cc3086d88e5e9e43c771e2bc3)

1 files changed, 63 insertions, 0 deletions

diff --git a/src/corelib/global/qoperatingsystemversion_win_p.h b/src/corelib/global/qoperatingsystemversion_win_p.h
new file mode 100644
index 0000000000..446bd286fc
--- /dev/null
+++ b/src/corelib/global/qoperatingsystemversion_win_p.h
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOPERATINGSYSTEMVERSION_WIN_P_H
+#define QOPERATINGSYSTEMVERSION_WIN_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qglobal.h>
+#include <qt_windows.h>
+
+QT_BEGIN_NAMESPACE
+
+OSVERSIONINFOEX qWindowsVersionInfo();
+
+QT_END_NAMESPACE
+
+#endif // QOPERATINGSYSTEMVERSION_WIN_P_H