gcc的makefile

[maosharen]

目录main下有如下内容：main.c，include文件夹，my文件夹。include文件夹下有my.h文件，my文件夹有my.c文件。
main.c内容如下：
#include "include/my.h"
int main()
{
my();
return 0;
}
my.c内容如下：
#include <stdio.h>
void my()
{printf("hello");}

my.h内容如下：
extern my();
请问应该如何编写makefile?我以前编写的makefile都是处理同一文件夹下的各个文件，碰到这种主文件，头文件，还有各个分支函数的实现文件分别存放在不同目录的情况，我就不知道怎么编写makefile了
非常感谢！！

[神奕]

obj = main.c my/my.c include/my.h
main: $(obj)
	gcc -o main $(obj)

[Dobzhansky]

试试 GNU Make 的 vpath 指令

[jwj070524]

建议好好的看一下《Managing Projects with GNU Makefile》这本书，有英文版和中文版的。 下面是我的makefile，还算通用，就是写的很复杂。共两个文件，一个是makefile，另外一个是make.rules。两个文件缺一不可，我就是看了上面的书写出来的。另外，再给你一个建议，你可以用cmake，cmake的语法不难，它是自动生成Makefile的工具。 <makefile>

ifdef ComSpec
EMPTY     :=
RM        := del
DELIMITER := \$(EMPTY)
TARGET    := libzooclient.dll
else
RM        := rm
DELIMITER := /
TARGET    := libzooclient.so
endif

all: $(TARGET)

src_fmt := *.c *.C *.cc *.CC *.cpp *.cxx
src_dir := src
inc_dir := include
obj_dir := obj

CFLAGS    := -fPIC -Wall -g -DTHREADED -I "/usr/local/include" \
						 $(foreach d,$(inc_dir), -I "$d")
CPPFLAGS  := -fPIC -Wall -g -DTHREADED -I "/usr/local/include" \
						 $(foreach d,$(inc_dir), -I "$d")
LDFLAGS   := -L "/usr/local/lib"
LOADLIBES := --shared -lzookeeper_mt -lm -lpthread

# List all sources now.
src     :=
$(foreach d,$(src_dir),\
 $(foreach f,$(src_fmt),\
  $(if $(wildcard $d/$f),$(eval src+=$(wildcard $d/$f)))))

# Check whether sources contains cxx files.
cplusplus := $(filter-out %.c,$(src))
# Check whether builds archive.
archive := $(filter %.a,$(TARGET))

include make.rules

ifneq ($(MAKECMDGOALS),"clean")
ifneq ($(MAKECMDGOALS),"distclean")
# Include dependent files if exist.
-include $(addprefix $(obj_dir)/,$(addsuffix .d, $(notdir $(src))))
# Generate compile rules from source to object file.
# To "C" files, use gcc, otherwise picking g++.
$(foreach f,$(src),\
 $(if $(filter %.c,$f),\
  $(eval $(call rule-generator-c2o,$(obj_dir),$f)),\
  $(eval $(call rule-generator-cxx2o,$(obj_dir),$f))))
# Generate compile rules from object files to executable.
#
# if source-file(s)-exists
#		if target-is-xxx.a
#			ar rv $@ $^
#   else if use-c++
#     g++ $^ -o $@
#   else
#     gcc $^ -o $@
#		endif
# endif
$(if $(src),\
 $(if $(archive),$(eval $(call archive-target,$(TARGET))),\
  $(if $(cplusplus),\
   $(eval $(call link-target-cxx,$(TARGET))),\
   $(eval $(call link-target-c,$(TARGET))))))

endif
endif

prompt_clean := @echo "Nothing to clean."
prompt_dclean:= @echo "Nothing to distclean."

objects :=
$(foreach d,$(obj_dir),\
 $(if $(wildcard $d/*.o), $(eval objects+=$(wildcard $d/*.o))))
depends :=
$(foreach d,$(obj_dir),\
 $(if $(wildcard $d/*.d), $(eval depends+=$(wildcard $d/*.d))))

clean_cmd := $(if $(objects)$(depends),\
              $(RM) $(objects) $(depends),\
              $(prompt_clean))
target :=
$(if $(wildcard $(TARGET)), $(eval target=$(TARGET)))
distclean_cmd := $(if $(objects)$(depends)$(target),\
                  $(RM) $(objects) $(depends) $(target),\
                  $(prompt_dclean))

clean:
	$(clean_cmd)
distclean:
	$(distclean_cmd)

.PHONY: all clean distclean

<make.rules>

# Compiler specific variables.
CC         := gcc
CXX        := g++
COMPILE.c   = $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
COMPILE.cxx = $(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
LINK.c.o    = $(CC) $(LDFLAGS) $(TARGET_ARCH)
LINK.cxx.o  = $(CXX) $(LDFLAGS) $(TARGET_ARCH)
AR         := ar
ARFLAGS     = rv

# Store all object files while generating rules.
allobjects :=

# ******************************** #
# ############### C ############### 

# $(call depend-generator-c,<target:$1>,<dependfilepath:$2>,<sourcefilepath:$3>
# Example: $(call depend-generator,obj/main.c.o,obj/main.c.d,src/main.c)
define depend-generator-c
$(CC) $(CFLAGS) -MM -MT $1 -MF $2 -MP $3
endef

# Automatic rules from *.c to *.o
# $(call rule-generator-c2o,<objdir:$1>,<sourcefilepath:$2>)
define rule-generator-c2o
allobjects += $1/$(notdir $2).o
$1/$(notdir $2).o: $2
	$$(call depend-generator-c,$1/$(notdir $2).o,$1/$(notdir $2).d,$2)
	$(COMPILE.c) $$< -o $$@
endef

# Automatic rules from *.o to executables
# $(call link-target-c,<target:$1>)
define link-target-c
$1: $(allobjects)
	$(LINK.c.o) $$^ $(LDLIBS) $(LOADLIBES) -o $$@
endef

# ******************************** #
# ############## C++ ##############

# $(call depend-generator-cxx,<target:$1>,<dependfilename:$2>,<sourcefilename:$3>
# Example: $(call depend-generator,obj/main.cxx.o,obj/main.cxx.d,src/main.cxx)
define depend-generator-cxx
$(CXX) $(CPPFLAGS) -MM -MT $1 -MF $2 -MP $3
endef

# Automatic rules from *.cxx to *.o
# $(call rule-generator-cxx2o,<objdir:$1>,<sourcefile:$2>)
define rule-generator-cxx2o
allobjects += $1/$(notdir $2).o
$1/$(notdir $2).o: $2
	$$(call depend-generator-cxx,$1/$(notdir $2).o,$1/$(notdir $2).d,$2)
	$(COMPILE.cxx) $$< -o $$@
endef

# Automatic rules from *.o to executables
# $(call link-target-cxx,<target:$1>)
define link-target-cxx
$1: $(allobjects)
	$(LINK.cxx.o) $$^ $(LDLIBS) $(LOADLIBES) -o $$@
endef

# *********************************** #
# ############## Archive ##############
# Automatic rule from *.o to archive
define archive-target
$1: $(allobjects)
	$(AR) $(ARFLAGS) $$@ $$^
endef

[jwj070524]

接楼上： Makefile中以下三行指定源代码、头文件、中间文件的目录 src_dir := src inc_dir := include obj_dir := obj 以下三行是设置编译器参数的 CFLAGS := -fPIC -Wall -g -DTHREADED -I "/usr/local/include" \ $(foreach d,$(inc_dir), -I "$d") CPPFLAGS := -fPIC -Wall -g -DTHREADED -I "/usr/local/include" \ $(foreach d,$(inc_dir), -I "$d") LDFLAGS := -L "/usr/local/lib" LOADLIBES := --shared -lzookeeper_mt -lm -lpthread

[qzw405]

推荐你用eclipse或者其他编译环境生成一个makefile然后自己改一下

[赵4老师]

搜“跟我一起写makefile”

[fang]

引用 1 楼 lisong694767315 的回复:

obj = main.c my/my.c include/my.h
main: $(obj)
	gcc -o main $(obj)

新增一个文件就要改makefile?