Mine

make -C libmpdvdkit2
make[1]: Entering directory `/home/juifsournois/mplay/MPlayer-1.0rc1/libmpdvdkit2'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/juifsournois/mplay/MPlayer-1.0rc1/libmpdvdkit2'
cc -Wdeclaration-after-statement -fno-PIC -O4 -march=prescott -mtune=prescott -pipe -ffast-math -fomit-frame-pointer -D_REENTRANT -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64  -I.  -I./libavutil -I./libavcodec -o mplayer mplayer.o m_property.o mp_msg.o asxparser.o codec-cfg.o cpudetect.o edl.o find_sub.o m_config.o m_option.o m_struct.o parser-cfg.o playtree.o playtreeparser.o spudec.o sub_cc.o subreader.o vobsub.o unrarlib.o mixer.o parser-mpcmd.o subopt-helper.o libvo/libvo.a libao2/libao2.a input/libinput.a   libmpcodecs/libmpcodecs.a loader/libloader.a loader/dshow/libDS_Filter.a loader/dmo/libDMO_Filter.a libaf/libaf.a libmpdemux/libmpdemux.a stream/stream.a libswscale/libswscale.a osdep/libosdep.a -Wl,-z,noexecstack  -Llibmpdvdkit2 -lmpdvdkit  libavformat/libavformat.a  libavcodec/libavcodec.a  libavutil/libavutil.a  libpostproc/libpostproc.a           -lz                      -lpthread -ldl -rdynamic  -lm    libfaad2/libfaad2.a  mp3lib/libMP3.a liba52/liba52.a libmpeg2/libmpeg2.a tremor/libvorbisidec.a           vidix/libvidix.a
libao2/libao2.a(ao_jack.o): In function `outputaudio':
ao_jack.c:(.text+0x201): undefined reference to `jack_port_get_buffer'
libao2/libao2.a(ao_jack.o): In function `init':
ao_jack.c:(.text+0x4e6): undefined reference to `jack_client_new'
ao_jack.c:(.text+0x533): undefined reference to `jack_set_process_callback'
ao_jack.c:(.text+0x55f): undefined reference to `jack_get_ports'
ao_jack.c:(.text+0x609): undefined reference to `jack_port_register'
ao_jack.c:(.text+0x685): undefined reference to `jack_client_close'
ao_jack.c:(.text+0x6ea): undefined reference to `jack_activate'
ao_jack.c:(.text+0x72a): undefined reference to `jack_port_name'
ao_jack.c:(.text+0x73f): undefined reference to `jack_connect'
ao_jack.c:(.text+0x7b5): undefined reference to `jack_get_sample_rate'
ao_jack.c:(.text+0x7cd): undefined reference to `jack_port_get_total_latency'
ao_jack.c:(.text+0x7dc): undefined reference to `jack_get_buffer_size'
libao2/libao2.a(ao_jack.o): In function `uninit':
ao_jack.c:(.text+0x96b): undefined reference to `jack_client_close'
collect2: ld returned 1 exit status
make: *** [mplayer] Error 1