$(object_dir)/gcrypt.o: CPPFLAGS += $(gcrypt_cppflags)
$(object_dir)/ao_write.o: CPPFLAGS += $(ao_cppflags)
$(object_dir)/alsa%.o: CPPFLAGS += $(alsa_cppflags)
$(object_dir)/gcrypt.o: CPPFLAGS += $(gcrypt_cppflags)
$(object_dir)/ao_write.o: CPPFLAGS += $(ao_cppflags)
$(object_dir)/alsa%.o: CPPFLAGS += $(alsa_cppflags)