I am new to RT-Thread, when I built the project in the directory of rt-thread-master/bsp/gd32450z-eval/ with keil_v5, then Keil_v5 outputted the following:
"no source": Error: #5: cannot open source input file "....libcpuarmcommonbacktrace.c": No such file or directory
So where to find backtrace.c, what is it used for ?