clnk -m Debug\project_1.map -l"D:\STM8 C\Lib"  -o Debug\project_1.sm8 Debug\project_1.lkf
#error clnk Debug\project_1.lkf:69 Debug\stm8_interrupt_vector.o: symbol f_NonHandledInterrupt multiply defined (Debug\stm8s_it.o)
The command: "clnk -m Debug\project_1.map -l"D:\STM8 C\Lib"  -o Debug\project_1.sm8 Debug\project_1.lkf " has failed, the returned value is: 1
exit code=1.

project_1.elf - 3 error(s), 0 warning(s)

symbol f_NonHandledInterrupt multiply defined
符号 f_NonHandledInterrupt 被重定义（多次定义）。

无意间解决了！！！！！！

怎么解决的？

中断向量重复定义了吧。