关于如何消除might be clobbered by 'longjmp' or 'vfork'

warning: variable 'terminal_indata_out' might be clobbered by 'longjmp' or 'vfork'
将原定义：int terminal_indata_out = 0x01;
修改为：volatile int terminal_indata_out = 0x01;
即可解决问题,原因在于terminal_indata_out变量空间被优化为使用寄存器了,应该将其修改为使用物理内存