libmpcodecs/ae_faac.o:ae_faac.c:(.text+0x8e): undefined reference to `faacEncOpen'
libmpcodecs/ae_faac.o:ae_faac.c:(.text+0xd6): undefined reference to `faacEncGetCurrentConfiguration'
libmpcodecs/ae_faac.o:ae_faac.c:(.text+0x1ab): undefined reference to `faacEncSetConfiguration'
libmpcodecs/ae_faac.o:ae_faac.c:(.text+0x2d2): undefined reference to `faacEncGetDecoderSpecificInfo'
libmpcodecs/ae_faac.o:ae_faac.c:(.text+0x39b): undefined reference to `faacEncEncode'

for me meant 
meant "you need this patch, for it to use the dynamic library instead"

http://oss.netfarm.it/mplayer/patches/xx_faac_dynload.diff

it “might” mean you need -lfaac in your configure