编译idoubs出错：Apple Mach-O Linker Error

Question

Undefined symbols for architecture i386:
"_th_comment_clear", referenced from:
_encode_init in libavcodec.a(libtheoraenc.o)
"_th_comment_init", referenced from:
_encode_init in libavcodec.a(libtheoraenc.o)
"_th_encode_alloc", referenced from:
_encode_init in libavcodec.a(libtheoraenc.o)
"_th_encode_ctl", referenced from:
_submit_stats in libavcodec.a(libtheoraenc.o)
_get_stats in libavcodec.a(libtheoraenc.o)
_encode_init in libavcodec.a(libtheoraenc.o)
"_th_encode_flushheader", referenced from:
_encode_init in libavcodec.a(libtheoraenc.o)
"_th_encode_free", referenced from:
_encode_close in libavcodec.a(libtheoraenc.o)
"_th_encode_packetout", referenced from:
_encode_frame in libavcodec.a(libtheoraenc.o)
"_th_encode_ycbcr_in", referenced from:
_encode_frame in libavcodec.a(libtheoraenc.o)
"_th_info_clear", referenced from:
_encode_init in libavcodec.a(libtheoraenc.o)
"_th_info_init", referenced from:
_encode_init in libavcodec.a(libtheoraenc.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
以上是编译idoubs目标时候的错误，用的Xcode6.1，添加了一些框架，感觉不应该是缺少框架了吧，请各位大神们赐教啊！！！

Answer 1

【libtheoraenc】跟这个名字相关得文件，是不是没放到程序里~编译的时候缺少文件了~先看看有没有引入，然后编译的配置里再看看有没有