编译 离在线语音识别 iOS SDK demo 报错。如下：请指导、

Apple Mach-O Linker Error Group
: "easr_engine::WakeUpFree()", referenced from:
: "easr_engine::WakeUpDecode(short*, int, char**, int, bool)", referenced from:
: "easr_engine::WakeUpReset()", referenced from:
: "easr_engine::WakeUpInitial(char const*, char const*, int)", referenced from:
: Linker command failed with exit code 1 (use -v to see invocation)