makefile examples

dependency.mk

CFLAGS = -g -Wall  -D_DEBUG_ -D_GNU_SOURCE $(ARCH) -Ilib/ -Isrc/

LIBS= $(SOCK) -lm -lpthread
PFLAGS= -follow-child-processes=yes -cache-dir=/tmp/${USER}
PURIFY= purify ${PFLAGS}


# Add any header files you've added here
sr_HDRS = lib/sha1.h lib/sr_dumper.h lib/sr_if.h lib/sr_rt.h lib/sr_utils.h \
          lib/vnscommand.h src/sr_arpcache.h src/sr_protocol.h src/sr_router.h

# Add any source files you've added here
sr_SRCS = lib/sha1.c lib/sr_dumper.c lib/sr_if.c lib/sr_rt.c lib/sr_utils.c \
          lib/sr_vns_comm.c src/sr_arpcache.c src/sr_main.c src/sr_router.c

sr_OBJS = $(patsubst %.c,%.o,$(sr_SRCS))
sr_DEPS = $(patsubst %.c,%.d,$(sr_SRCS))

hurr :
	@echo $(sr_DEPS)

$(sr_OBJS) : %.o : %.c
	$(CC) -c $(CFLAGS) $< -o $@

$(sr_DEPS) : %.d : %.c
	$(CC) -MM $(CFLAGS) $<  > $@

include $(sr_DEPS)

sr : $(sr_OBJS)
	$(CC) $(CFLAGS) -o sr $(sr_OBJS) $(LIBS)

sr.purify : $(sr_OBJS)
	$(PURIFY) $(CC) $(CFLAGS) -o sr.purify $(sr_OBJS) $(LIBS)

.PHONY : clean clean-deps dist

clean:
	rm -f *.o *~ core sr *.dump *.tar tags

clean-deps:
	rm -f .*.d

dist-clean: clean clean-deps
	rm -f .*.swp sr_stub.tar.gz

dist: dist-clean
	(cd ..; tar -X stub/exclude -cvf sr_stub.tar stub/; gzip sr_stub.tar); \
    mv ../sr_stub.tar.gz .

tags:
	ctags *.c

submit:
	@tar -czf router-submit.tar.gz $(sr_SRCS) $(sr_HDRS) README Makefile

makefile.mk

PACKS = io src
# compile all *.c in packages
# $(shell) call shell 
INPUT= $(shell find $(PACKS) -name '*.c') 
OBJDIR = obj
# $(patsubst pattern, replacement, text) 
# 		replace strings
#
# $(addprefix prefix,names...) 
# 		prepend prefix to each word in names
#
# $(notdir names)
# 		Extracts all but the directory-part of each file name in names. 
# 		If the file name contains no slash, it is left unchanged. 
# 		Otherwise, everything through the last slash is removed from it.
OBJS = $(patsubst %.c,%.o,$(addprefix $(OBJDIR)/, $(notdir $(INPUT)))) 
CFLAGS = -pthread -m32
INCS = -I include/ 
REPATH = main

all: $(OBJS)
	@echo output  $(wildcard obj/*)

# list : list 
$(OBJS): $(INPUT)
	gcc -c -o $@ $(shell find . -name $(notdir $(patsubst %.o,%.c,$@))) \
		$(CFLAGS) $(INCS)

# avoid filename = clean
.PHONY: clean
clean: 
	rm obj/*

makefile2.mk

PACKS = io src
# variable VPATH specifies a list of directories that make should search. 
# Most often, the directories are expected to contain prerequisite files 
# that are not in the current directory; 
# however, make uses VPATH as a search list for both prerequisites 
# and targets of rules.
VPATH = io:src
# compile all *.c in packages
# $(shell) call shell 
INPUT= $(shell find $(PACKS) -name '*.c') 
OBJDIR = obj
# $(patsubst pattern, replacement, text) 
# 		replace strings
#
# $(addprefix prefix,names...) 
# 		prepend prefix to each word in names
#
# $(notdir names)
# 		Extracts all but the directory-part of each file name in names. 
# 		If the file name contains no slash, it is left unchanged. 
# 		Otherwise, everything through the last slash is removed from it.
OBJS = $(patsubst %.c,%.o,$(addprefix $(OBJDIR)/, $(notdir $(INPUT)))) 
CFLAGS = -pthread -m32
INCS = -I include/ 
REPATH = main
 
all: $(OBJS)
	@echo output  $(wildcard obj/*)
 
# list : list 
$(OBJDIR)/%.o: %.c
	gcc -c -o $@ $< $(CFLAGS) $(INCS)
 
# avoid filename = clean
.PHONY: clean
clean: 
	rm obj/*

makefile3.mk

EXECS = echoclient echoservice hostinfo
EOBJS = $(addsuffix .o, $(EXECS))
OBJS = csapp.o echo.o 
CFLAGS = -pthread -m32 -g

all: $(EXECS)

# static pattern matching
# tasks: pat: pat-req
# eg: 
# 	OBJS=(foo.o bar.o)
# 	$(OBJS): %.o: %.c
# 		$(CC) -c $< -o $@ $(CCFLAGS)
# $^
# The names of all the prerequisites, with spaces between them
$(EXECS): %: %.c $(OBJS)
	gcc $^ -o $@ $(CFLAGS)

%.o: %.c
	gcc -c -o $@ $< $(CFLAGS)

.PHONY: clean
clean:
	rm *.o

$(sr_DEPS) : %.d : %.c
    $(CC) -MM $(CFLAGS) $<  > $@

include $(sr_DEPS)

gcc -MM生成的依赖关系，然后导入makefile中, 比如

sr_main.o: src/sr_main.c lib/sr_dumper.h src/sr_router.h \
 src/sr_protocol.h src/sr_arpcache.h lib/sr_if.h src/sr_protocol.h \
 lib/sr_rt.h lib/sr_if.h

这样一旦头文件改变了就会重新编译