C++ code add on FreeRTOS

jimmy · **Joined:** Thu Apr 14, 2011 11:27 am **Posts:** 20

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crtend.c [1.04 KiB]
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FreeRTOS programmed by C language. If C++ code wants to add in FreeRTOS, you should update steps as following. C++ code can merge into Andes FreeRTOS.

1. Makefile :
add define in Makefile :

Code:

C++ := $(CROSS_COMPILE)g++

add suffixes rules in Makefile:

Code:

%.o: %.cpp
$(TRACE_C++)
$(Q)$(C++) -c -MMD $(CFLAGS) -o $@ $<

2. add crtbegin.c/crtend.c files (attached files) into folder RTOSDemo_bsp and both file will be compiled into project.

3. call function "_crt_init"in Start.S:

Code:

! System reset handler
   bal   reset
   bal _crt_init
   ! Infinite loop, if returned accidently
1:
   b       1b

4. add code "void __cxa_atexit(void (*arg1)(void*), void* arg2, void* arg3)
{
}

void* __dso_handle = (void*) &__dso_handle;
" in startup-nds32.c:

Code:

#include "nds32_intrinsic.h"
#include "nds32_defs.h"

void __cxa_atexit(void (*arg1)(void*), void* arg2, void* arg3)
{
}

void* __dso_handle = (void*) &__dso_handle;

#ifndef VECTOR_BASE
#define VECTOR_BASE   0x00000000

Please pay attention to following:
C++ program can call C function but C program can't call C++

If you are curious above updates, you can check web site https://gcc.gnu.org/onlinedocs/gccint/I ... ation.html to know reason.

Andes Workshop

C++ code add on FreeRTOS

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