makefile~

抽烟者问题。假设一个系统中有三个抽烟者进程

hdrs=ipc.h
opts=-g -c
cig_src=cig_smoker.c ipc.c
pap_src=pap_smoker.c ipc.c
glu_src=glu_smoker.c ipc.c
p_src=provider.c ipc.c
cig_obj=cig_smoker.o ipc.o
pap_obj=pap_smoker.o ipc.o
glu_obj=glu_smoker.o ipc.o
p_obj=provider.o ipc.o
all:provider cig_smoker pap_smoker glu_smoker
provider:$(p_obj) $(hdrs)
	gcc $(p_obj) -o provider
provider.o:$(p_src) $(hdrs)
	gcc $(opts) $(p_src)
cig_smoker:$(cig_obj)
	gcc $(cig_obj) -o cig_smoker
cig_smoker.o:$(cig_src) $(hdrs)
	gcc $(opts) $(cig_src)
pap_smoker:$(pap_obj)
	gcc $(pap_obj) -o pap_smoker
pap_smoker.o:$(pap_src) $(hdrs)
	gcc $(opts) $(pap_src)
glu_smoker:$(glu_obj)
	gcc $(glu_obj) -o glu_smoker
glu_smoker.o:$(glu_src) $(hdrs)
	gcc $(opts) $(glu_src)
clean:
	rm provider cig_smoker pap_smoker glu_smoker *.o