+# conditional library dependencies, in linking order
+enabled movie_filter && prepend avfilter_deps "avformat avcodec"
+enabled resample_filter && prepend avfilter_deps "avresample"
+enabled scale_filter && prepend avfilter_deps "swscale"
+
+enabled opus_decoder && prepend avcodec_deps "avresample"
+
+expand_deps(){
+ lib_deps=${1}_deps
+ eval "deps=\$$lib_deps"
+ append $lib_deps $(map 'eval echo \$${v}_deps' $deps)
+ unique $lib_deps
+}
+
+map 'expand_deps $v' $LIBRARY_LIST
+