1LD_EXTRAS := -L. -LOne -l$(LIB_PREFIX)One -LTwo -l$(LIB_PREFIX)Two 2C_SOURCES := main.c 3 4include Makefile.rules 5 6.PHONY: 7a.out: lib_One lib_Two 8 9lib_%: 10 $(MAKE) VPATH=$(SRCDIR)/$* -I $(SRCDIR) -f $(SRCDIR)/$*.mk 11