makefile学习笔记-1 （2020-04-08）

代码路径：

代码：

---

main.cpp

---

#include<iostream>

using namespace std;

#include "zte.h"

#include "h3c.h"

int main()

{

    zte();

    h3c();

    return 0;

}

---

zte.cpp

---

#include<iostream>

using namespace std;

void zte()

{

    cout << "hello zte .." << endl;

    return;

}

---

zte.h

---

#ifndef _ZTE_H_

#define _ZTE_H_

void zte();

#endif

---

h3c.cpp

---

#include<iostream>

using namespace std;

void h3c()

{

    cout << "hello h3c .." << endl;

    return;

}

---

h3c.h

---

#ifndef _H3C_H_

#define _H3C_H_

void h3c();

#endif

makefile

---

基础版：

{

main:main.o zte.o h3c.o

    g++ -o main main.o zte.o h3c.o

main.o:main.cpp zte.h h3c.h

    g++ -c main.cpp -o main.o

zte.o:zte.cpp

    g++ -c zte.cpp -o zte.o

h3c.o:h3c.cpp

    g++ -c h3c.cpp -o h3c.o

clean:

    rm -rf *.o *.out *.s main

hello:

    g++ -o main main.o zte.o h3c.o

    ./main

}

注：1，g++ -c *.cpp 默认生成对应的.o文件，所以-o *.o可以不写

        2，g++或者gcc前面一定要有tab

优化版：变量使用：

{

OBJS = main.o zte.o h3c.o

INC = zte.h h3c.h

TARGET = main

main:$(OBJS)

    g++ -o $(TARGET) $(OBJS)

main.o:main.cpp $(INC)

    g++ -c main.cpp -o main.o

zte.o:zte.cpp

    g++ -c zte.cpp -o zte.o

h3c.o:h3c.cpp

    g++ -c h3c.cpp -o h3c.o

clean:

rm -f *.o *.out *.s main

hello:

    g++ -o $(TARGET) $(OBJS)

./$(TARGET)

}

精简版：make自动推导依赖文件

{

OBJS = main.o zte.o h3c.o

INC = zte.h h3c.h

TARGET = main

main:$(OBJS)

g++ -o $(TARGET) $(OBJS)

main.o:$(INC)

zte.o:

h3c.o:

clean:    

    rm -f *.o *.out *.s main

hello:

    g++ -o $(TARGET) $(OBJS)

./$(TARGET)

}

---

执行结果：

---

[huchangkun@vm64-1 hello]$ make -j

g++    -c -o main.o main.cpp

g++    -c -o zte.o zte.cpp

g++    -c -o h3c.o h3c.cpp

g++ -o main main.o zte.o h3c.o

[huchangkun@vm64-1 hello]$ make hello

g++ -o main main.o zte.o h3c.o

./main

hello zte ..

hello h3c ..

[huchangkun@vm64-1 hello]$

[huchangkun@vm64-1 hello]$ make clean

rm -f *.o *.out *.s main

[huchangkun@vm64-1 hello]$ ls

h3c.cpp  h3c.h  main.cpp  makefile  zte.cpp  zte.h

[huchangkun@vm64-1 hello]$