Intro to Makefile

Abstract
This blog will show you how to write a “makefile” file.

1. Concept
A makefile is a file containing a set of directives, directing a complier to link a program in a certain order.

2. An Example
file1.h

#ifndef file1_h#define file1_hvoid tool1(char *);void tool1(const char *);#endif
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file1.cpp

#include <stdio.h>#include "file1.h"void tool1(char *str){    printf("This is file1 print: %s\n",str);}void tool1(const char *str){    printf("This is file1 print: %s\n",str);}
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file2.h

#ifndef file2_h#define file2_hvoid tool2(char *);void tool2(const char *);#endif
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file2.cpp

#include <stdio.h>#include "file2.h"void tool2(char *str){    printf("This is file2 print: %s\n",str);}void tool2(const char *str){    printf("This is file2 print: %s\n",str);}
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main.cpp

#include <stdio.h>#include <stdlib.h>#include "file1.h"#include "file2.h"int main(){    char str1[] = "hello";    tool1(str1);    const char str1_c[] = "hello";    tool1(str1_c);    char str2[] = "hello";    tool2(str2);    const char str2_c[] = "hello";        tool2(str2_c);}
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makefile

CC := g++CFLAGS := -gTARGET := targetSRCS := $(wildcard *.cpp)OBJS := $(patsubst %cpp,%o,$(SRCS))all:$(TARGET) clean%.o:%.cpp    $(CC) $(CFLAGS) -c $<$(TARGET):$(OBJS)    $(CC) $(CFLAGS) -o $@ $^clean:    rm -rf *.o
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3. Reference
https://github.com/Canhui/C-Plus-Standard-By-Practice/tree/master/Project_1_Makefile
http://blog.csdn.net/wallwind/article/details/6791505
http://wenku.baidu.com/link?url=P2odKaCA4zRTieikBQoaSD77YBOQTbnG0D3VHxNdTJDTsitCNsKdrZIgxfRfW2vrdpPFhfMuHfWJHfwDPWFrTT-KnXD7GBJBTxYvSxiRDh3