First commit XiUOS

lib/libcpp/Kconfig

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+menu "C++ features"
+
+config  LIB_CPLUSPLUS
+    bool "Support C++ features"
+    default n
+
+endmenu

lib/libcpp/Makefile

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+
+SRC_FILES := cppinit.c crt.cpp
+
+
+include $(KERNEL_ROOT)/compiler.mk

lib/libcpp/cppinit.c

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+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+* Change Logs:
+* Date           Author       Notes
+* 2014-12-03     Bernard      Add copyright header.
+* 2014-12-29     Bernard      Add cplusplus initialization for ARMCC.
+* 2016-06-28     Bernard      Add _init/_fini routines for GCC.
+* 2016-10-02     Bernard      Add WEAK for cplusplus_system_init routine.
+*/
+
+/**
+* @file:    cppinit.c
+* @brief:   cplusplus initialzation
+* @version: 1.0
+* @author:  AIIT XUOS Lab
+* @date:    2021/4/25
+*/
+
+/*************************************************
+File name: cppinit.c
+Description: support cppinit function
+Others: take RT-Thread v4.0.2/components/cplusplus/crt_init.c for references
+                https://github.com/RT-Thread/rt-thread/tree/v4.0.2
+History: 
+1. Date: 2021-04-25
+Author: AIIT XUOS Lab
+Modification: 
+1. support cppinit function
+*************************************************/
+
+int cplusplus_system_init(void)   
+
+{
+    typedef void(*pfunc)();
+    extern pfunc __ctors_start__[];
+    extern pfunc __ctors_end__[];
+    pfunc *p;
+
+    for (p = __ctors_start__; p < __ctors_end__; p++)
+        (*p)();
+
+    return 0;
+}

lib/libcpp/crt.cpp

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+/*
+* Copyright (c) 2020 AIIT XUOS Lab
+* XiUOS is licensed under Mulan PSL v2.
+* You can use this software according to the terms and conditions of the Mulan PSL v2.
+* You may obtain a copy of Mulan PSL v2 at:
+*        http://license.coscl.org.cn/MulanPSL2
+* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+* See the Mulan PSL v2 for more details.
+*/
+
+/**
+* @file:    crt.c
+* @brief:   cplusplus initialzation
+* @version: 1.0
+* @author:  AIIT XUOS Lab
+* @date:    2020/3/15
+*
+*/
+#include <xiuos.h>
+#include "crt.h"
+
+void *operator new(size_t size)
+{
+    return x_malloc(size);
+}
+
+void *operator new[](size_t size)
+{
+    return x_malloc(size);
+}
+
+void operator delete(void *ptr)
+{
+    x_free(ptr);
+}
+
+void operator delete[](void *ptr)
+{
+    return x_free(ptr);
+}

lib/libcpp/crt.h

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+/*
+* Copyright (c) 2020 AIIT XUOS Lab
+* XiUOS is licensed under Mulan PSL v2.
+* You can use this software according to the terms and conditions of the Mulan PSL v2.
+* You may obtain a copy of Mulan PSL v2 at:
+*        http://license.coscl.org.cn/MulanPSL2
+* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+* See the Mulan PSL v2 for more details.
+*/
+
+/**
+* @file:    crt.h
+* @brief:   head file for crt.c
+* @version: 1.0
+* @author:  AIIT XUOS Lab
+* @date:    2020/3/15
+*
+*/
+#ifndef CRT_H_
+#define CRT_H_
+
+void *operator new(size_t size);
+void *operator new[](size_t size);
+
+void operator delete(void * ptr);
+void operator delete[](void *ptr);
+
+#endif