An error of compiling MPlayer

[jesse.zwd]

While I compile MPlayer, error of FFpmeg occurs as the following:

libavcodec/x86/dsputil_mmx.c: In function 'dsputil_init_mmxext':
libavcodec/x86/dsputil_mmx.c:2487:1: error: 'put_h264_qpel16_mc00_mmxext' undeclared (first use in this function)
......
libavcodec/x86/dsputil_mmx.c:2727:1: error: 'ff_avg_h264_qpel16_mc30_10_ssse3_cache64' undeclared (first use in this function)
libavcodec/x86/dsputil_mmx.c:2727:1: error: 'ff_avg_h264_qpel8_mc30_10_ssse3_cache64' undeclared (first use in this function)
libavcodec/x86/dsputil_mmx.c: At top level:
libavcodec/x86/dsputil_mmx.c:2164:13: warning: 'vector_fmul_window_3dnowext' defined but not used [-Wunused-function]
make[1]: *** [libavcodec/x86/dsputil_mmx.o] Error 1
make[1]: Leaving directory `/home/jesse/workspace/CodeBlock/mplayer/ffmpeg'
make: *** [ffmpeg/libavcodec/libavcodec.a] error 2

What is the problem?

Thanks a lot!