ffmpeg 컴파일하느라고 몇일째 삽질중입니다

아래의 에러는 뭐때문에 나는건지...?

검색해보면 다른분들도 같은에러로 고생한사람들이 많은것같은데

전부 영어로 되어있어서...

컴파일하다 경험있으신분 조언부탁드립니다

$ /home/Administrator/android-ndk-r7-windows/android-ndk-r7/ndk-build
Compile thumb  : baseplayer-jni <= Interface.c
SharedLibrary  : libbaseplayer-jni.so
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/obj/local/armeabi-v7a/objs/baseplayer-jni/BasicPlayer.o: In function `closeMovie':
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:134: undefined reference to `av_freep'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:136: undefined reference to `av_freep'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:139: undefined reference to `avcodec_close'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:144: undefined reference to `av_close_input_file'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/obj/local/armeabi-v7a/objs/baseplayer-jni/BasicPlayer.o: In function `decodeFrame':
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:90: undefined reference to `avcodec_decode_video2'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:105: undefined reference to `av_free_packet'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:88: undefined reference to `av_read_frame'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:93: undefined reference to `sws_getCachedContext'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:97: undefined reference to `sws_scale'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:99: undefined reference to `av_free_packet'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/obj/local/armeabi-v7a/objs/baseplayer-jni/BasicPlayer.o: In function `openMovie':
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:42: undefined reference to `av_open_input_file'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:45: undefined reference to `av_find_stream_info'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:60: undefined reference to `avcodec_find_decoder'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:64: undefined reference to `avcodec_open'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:67: undefined reference to `avcodec_alloc_frame'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:71: undefined reference to `avcodec_alloc_frame'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:75: undefined reference to `avpicture_get_size'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/BasicPlayer.c:78: undefined reference to `avpicture_fill'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/obj/local/armeabi-v7a/objs/baseplayer-jni/Interface.o: In function `Java_net_jbong_FFmpegBasic_MoviePlayView_renderFrame':
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/Interface.c:47: undefined reference to `AndroidBitmap_lockPixels'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/Interface.c:53: undefined reference to `AndroidBitmap_unlockPixels'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/obj/local/armeabi-v7a/objs/baseplayer-jni/Interface.o: In function `Java_net_jbong_FFmpegBasic_MoviePlayView_initBasicPlayer':
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/Interface.c:19: undefined reference to `android_getCpuFamily'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/Interface.c:19: undefined reference to `android_getCpuFeatures'
E:/cygwin/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/jni/BasicPlayer/Interface.c:20: undefined reference to `av_register_all'
collect2: ld returned 1 exit status
/home/Administrator/android-ndk-r7-windows/android-ndk-r7/build/core/build-binary.mk:312: recipe for target `/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/obj/local/armeabi-v7a/libbaseplayer-jni.so' failed
make: *** [/home/Administrator/android-ndk-r7-windows/android-ndk-r7/myprojects/obj/local/armeabi-v7a/libbaseplayer-jni.so] Error 1