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diff --git a/src/corelib/kernel/qfunctions_fake_env_p.h b/src/corelib/kernel/qfunctions_fake_env_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFUNCTIONS_FAKE_ENV_P_H
+#define QFUNCTIONS_FAKE_ENV_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the QLibrary class.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qbytearray.h"
+#include "qhash.h"
+
+QT_BEGIN_NAMESPACE
+
+// Environment ------------------------------------------------------
+Q_CORE_EXPORT QHash<QByteArray, QByteArray> &qt_app_environment()
+{
+    static QHash<QByteArray, QByteArray> internalEnvironment;
+    return internalEnvironment;
+}
+
+errno_t qt_fake_getenv_s(size_t *sizeNeeded, char *buffer, size_t bufferSize, const char *varName)
+{
+    if (!sizeNeeded)
+        return EINVAL;
+
+    QHash<QByteArray, QByteArray>::const_iterator iterator = qt_app_environment().constFind(varName);
+    if (iterator == qt_app_environment().constEnd()) {
+        if (buffer)
+            buffer[0] = '\0';
+        return ENOENT;
+    }
+
+    const int size = iterator->size() + 1;
+    if (bufferSize < size_t(size)) {
+        *sizeNeeded = size;
+        return ERANGE;
+    }
+
+    qstrcpy(buffer, iterator->constData());
+    return 0;
+}
+
+errno_t qt_fake__putenv_s(const char *varName, const char *value)
+{
+    QHash<QByteArray, QByteArray>::iterator iterator = qt_app_environment().find(varName);
+    QHash<QByteArray, QByteArray>::iterator end = qt_app_environment().end();
+    if (!value || !*value) {
+        if (iterator != end)
+            qt_app_environment().erase(iterator);
+    } else {
+        if (iterator == end)
+            qt_app_environment()[varName] = QByteArray(value);
+        else
+            (*iterator) = value;
+    }
+
+    return 0;
+}
+
+QT_END_NAMESPACE
+
+#endif // QFUNCTIONS_FAKE_ENV_P_H