These files include ogg/ogg.h, so we must pass $(ogg_cppflags)
to avoid build failure in case ogg headers are installed at a
non-standard location.
$(object_dir)/oggdec_filter.o \
$(object_dir)/ogg_afh.o \
$(object_dir)/ogg_afh_common.o \
$(object_dir)/oggdec_filter.o \
$(object_dir)/ogg_afh.o \
$(object_dir)/ogg_afh_common.o \
: CPPFLAGS += $(ogg_cppflags)
$(object_dir)/%.o: %.c | $(object_dir)
: CPPFLAGS += $(ogg_cppflags)
$(object_dir)/%.o: %.c | $(object_dir)