It is impossible to build E-AC-3 without AC-3.
Originally committed as revision 19477 to svn://svn.ffmpeg.org/ffmpeg/trunk
dca_decoder_select="fft mdct"
dnxhd_encoder_select="aandct"
dxa_decoder_select="zlib"
-eac3_decoder_select="fft mdct"
+eac3_decoder_select="ac3_decoder"
eatgq_decoder_select="aandct"
eatqi_decoder_select="aandct"
ffv1_decoder_select="golomb"
OBJS-$(CONFIG_DVVIDEO_DECODER) += dv.o
OBJS-$(CONFIG_DVVIDEO_ENCODER) += dv.o
OBJS-$(CONFIG_DXA_DECODER) += dxa.o
-OBJS-$(CONFIG_EAC3_DECODER) += eac3dec.o ac3dec.o ac3tab.o ac3dec_data.o ac3.o
OBJS-$(CONFIG_EACMV_DECODER) += eacmv.o
OBJS-$(CONFIG_EAMAD_DECODER) += eamad.o eaidct.o
OBJS-$(CONFIG_EATGQ_DECODER) += eatgq.o eaidct.o