libcurses.a: libcurses.a(beep.o)
libcurses.a(beep.o): $(OBJDIR)/beep.o
	@$(AR) $(ARFLAGS) $@ $(OBJDIR)/$%

$(OBJDIR)/beep.o: curses/beep.c
	@echo "[CC] $@"
	@mkdir -p "$(@D)"
	@$(CC) -c -o $@ $(CFLAGS) curses/beep.c