The S/P-DIF muxer depends on mpeg4audio.o.

Originally committed as revision 20960 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -456,7 +456,8 @@ OBJS-$(CONFIG_NUT_MUXER)               += mpegaudiodata.o
 OBJS-$(CONFIG_OGG_DEMUXER)             += flacdec.o flacdata.o flac.o
 OBJS-$(CONFIG_OGG_MUXER)               += xiph.o flacdec.o flacdata.o flac.o
 OBJS-$(CONFIG_RTP_MUXER)               += mpegvideo.o
-OBJS-$(CONFIG_SPDIF_MUXER)             += aac_parser.o aac_ac3_parser.o
+OBJS-$(CONFIG_SPDIF_MUXER)             += aac_parser.o aac_ac3_parser.o \
+                                          mpeg4audio.o
 
 # external codec libraries
 OBJS-$(CONFIG_LIBDIRAC_DECODER)           += libdiracdec.o