动态库的制作与链接

测试代码:

//zsw.h
extern int add(int x, int y);
extern int sub(int x, int y);

//zsw.c
int add(int x, int y){
    return x+y;
}
int sub(int x, int y){
    return x-y;
}

//zsw_main.c
#include<stdio.h>
#include"zsw.h"

int main(){
    int a=20, b=10, sum, diff;
    sum = add(a, b);
    diff = sub(a,b);
    printf("sum=%d", sum);
    printf("diff=%d", diff);
}

制作动态库:

gcc -shared zsw.c -o libzsw.so

运行截图:

动态库的链接方法:

1> 将动态库放置到/lib目录下

2> 修改环境变量LD_LIBRARY_PATH

3> 在.bashrc添加环境变量LD_LIBRARY_PATH

4>修改/etc/ld.so.conf