编译中遇到的异常报错解决

问题报错：

/arm-broadcom-linux-uclibcgnueabi/bin/ld: errno: TLS reference in /home/xxxxxx/host/usr/arm-broadcom-linux-uclibcgnueabi/sysroot/usr/lib/libpthread.a(sem_post.os) mismatches non-TLS definition in /home/xxxxxx/build/unix-user/iproc-3_6/libsnmpAgent.a(snmpdlib.o) section .bss
/xxx/host/usr/arm-broadcom-linux-uclibcgnueabi/sysroot/usr/lib/libpthread.a: could not read symbols: Bad value
collect2: error: ld returned 1 exit status

解决：

1. extern int errno  
2. 改为  #include<errno.h>  

参考博客：http://blog.youkuaiyun.com/creater2009/article/details/7433745