implement legacy support

components/legacy/rtlegacy.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-11-14     Meco Man     the first version
+ */
+
+#ifndef __RT_LEGACY_H__
+#define __RT_LEGACY_H__
+
+#include <rtconfig.h>
+
+/* rtlibc */
+#include <stdint.h>
+#include <stddef.h>
+
+/* IPC */
+#ifdef RT_USING_DEVICE_IPC
+#include "ipc/workqueue_legacy.h"
+#endif /* RT_USING_DEVICE_IPC */
+
+/* FinSH */
+
+#endif /* __RT_LEGACY_H__ */