Add Qt libs and headers

paho-mqtt3as-proxy/Qt/include/QtCore/qstringfwd.h

@@ -0,0 +1,56 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include <QtCore/qglobal.h>
+
+#ifndef QSTRINGFWD_H
+#define QSTRINGFWD_H
+
+QT_BEGIN_NAMESPACE
+
+#if QT_VERSION >= QT_VERSION_CHECK(7, 0, 0)
+# define QT_BEGIN_HAS_CHAR8_T_NAMESPACE inline namespace q_has_char8_t {
+# define QT_BEGIN_NO_CHAR8_T_NAMESPACE namespace q_no_char8_t {
+#else
+# define QT_BEGIN_HAS_CHAR8_T_NAMESPACE namespace q_has_char8_t {
+# define QT_BEGIN_NO_CHAR8_T_NAMESPACE inline namespace q_no_char8_t {
+#endif
+#define QT_END_HAS_CHAR8_T_NAMESPACE }
+#define QT_END_NO_CHAR8_T_NAMESPACE }
+
+// declare namespaces:
+QT_BEGIN_HAS_CHAR8_T_NAMESPACE
+QT_END_HAS_CHAR8_T_NAMESPACE
+QT_BEGIN_NO_CHAR8_T_NAMESPACE
+QT_END_NO_CHAR8_T_NAMESPACE
+
+class QByteArray;
+class QByteArrayView;
+#if QT_VERSION >= QT_VERSION_CHECK(7, 0, 0) || defined(QT_BOOTSTRAPPED) || defined(Q_QDOC)
+class QLatin1StringView;
+using QLatin1String = QLatin1StringView;
+#else
+class QLatin1String;
+using QLatin1StringView = QLatin1String;
+#endif
+class QStringView;
+template <bool> class QBasicUtf8StringView;
+class QAnyStringView;
+class QChar;
+class QRegularExpression;
+class QRegularExpressionMatch;
+
+#ifndef Q_QDOC
+// ### Qt 7: remove the non-char8_t version of QUtf8StringView
+QT_BEGIN_NO_CHAR8_T_NAMESPACE
+using QUtf8StringView = QBasicUtf8StringView<false>;
+QT_END_NO_CHAR8_T_NAMESPACE
+
+QT_BEGIN_HAS_CHAR8_T_NAMESPACE
+using QUtf8StringView = QBasicUtf8StringView<true>;
+QT_END_HAS_CHAR8_T_NAMESPACE
+#endif // Q_QDOC
+
+QT_END_NAMESPACE
+
+#endif // QSTRINGFWD_H