TMS320C6748 SYS/BIOS 中使用ndk进行udp连接

我添加了ndk库,调用api接口出错,错误如下:

Description Resource Path Location Type
<a href="processors.wiki.ti.com/.../10234"> unresolved symbols remain udp_t C/C++ Problem
gmake: *** [all] Error 2 udp_t C/C++ Problem
gmake[1]: *** [udp_t.out] Error 1 udp_t C/C++ Problem
unresolved symbol mmZeroInit, first referenced in ./main.obj udp_t C/C++ Problem
unresolved symbol NDK_bind, first referenced in ./main.obj udp_t C/C++ Problem
unresolved symbol NDK_sendto, first referenced in ./main.obj udp_t C/C++ Problem
unresolved symbol NDK_socket, first referenced in ./main.obj udp_t C/C++ Problem

是什么原因啊?如果有现有的参考例程也麻烦告知一下。