嵌入式gdb 问题

gdb 编译 host=arm-linux target=arm-linux

用该gdb去调试程序时，打印
warning: td_ta_new failed: generic error
warning: td_ta_new failed: generic error
warning: td_ta_new failed: generic error
warning: td_ta_new failed: generic error
warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
warning: td_ta_new failed: generic error
warning: td_ta_new failed: generic error
warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
warning: td_ta_new failed: generic error
warning: td_ta_new failed: generic error
warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.


Program received signal SIG32, Real-time event 32.
0x400f9940 in __rt_sigsuspend () from /lib/libc.so.0

嵌入式上调试不是KGBD么，X86和ARM是不一样的