-$(object_dir)/opus%.o: CPPFLAGS += $(opus_cppflags)
-$(object_dir)/gui%.o: CPPFLAGS += $(curses_cppflags)
-$(object_dir)/spx%.o: CPPFLAGS += $(speex_cppflags)
-$(object_dir)/%.cmdline.o: CPPFLAGS += -Wno-unused-function
-
-$(object_dir)/mp3_afh.o: CPPFLAGS += $(id3tag_cppflags)
-$(object_dir)/crypt.o: CPPFLAGS += $(openssl_cppflags)
-$(object_dir)/mp3dec_filter.o: CPPFLAGS += $(mad_cppflags)
-$(object_dir)/compress_filter.o: CPPFLAGS += -O3
-$(object_dir)/ao_write.o: CPPFLAGS += $(ao_cppflags)
-
-$(object_dir)/aacdec_filter.o \
-$(object_dir)/aac_common.o \
-$(object_dir)/aac_afh.o \
+
+$(object_dir)/opus%.o $(dep_dir)/opus%.d: CPPFLAGS += $(opus_cppflags)
+$(object_dir)/gui.o $(object_dir)/gui%.o $(dep_dir)/gui%.d \
+: CPPFLAGS += $(curses_cppflags)
+$(object_dir)/spx%.o $(dep_dir)/spx%.d: CPPFLAGS += $(speex_cppflags)
+$(object_dir)/flac%.o $(dep_dir)/flac%.d: CPPFLAGS += $(flac_cppflags)
+
+$(object_dir)/mp3_afh.o $(dep_dir)/mp3_afh.d: CPPFLAGS += $(id3tag_cppflags)
+$(object_dir)/crypt.o $(dep_dir)/crypt.d: CPPFLAGS += $(openssl_cppflags)
+$(object_dir)/gcrypt.o $(dep_dir)/gcrypt.d: CPPFLAGS += $(gcrypt_cppflags)
+$(object_dir)/ao_write.o $(dep_dir)/ao_write.d: CPPFLAGS += $(ao_cppflags)
+
+$(object_dir)/interactive.o $(dep_dir)/interactive.d \
+: CPPFLAGS += $(readline_cppflags)
+
+$(object_dir)/resample_filter.o $(dep_dir)/resample_filter.d \
+: CPPFLAGS += $(samplerate_cppflags)
+
+$(object_dir)/mp3dec_filter.o $(dep_dir)/mp3dec_filter.d \
+: CPPFLAGS += $(mad_cppflags)
+
+$(object_dir)/aacdec_filter.o $(dep_dir)/aacdec_filter.d \
+$(object_dir)/aac_common.o $(dep_dir)/aac_common.d \
+$(object_dir)/aac_afh.o $(dep_dir)/aac_afh.d \