The Linux static library

 

 

Naming rules:

lib + + .a library name

Production steps

Generating a file corresponding to .o .c à .o

The resulting .o file names package ar rcs + static library (libMytest.a) + generated by all the .o 

Publish and use static libraries:

1) publish static

2) the header file

 

File as shown below:

　　1) generate the corresponding .o file

　　2) The resulting .o file package, and move to folder lib

　　3) Verify library file data generated

　　

Write a test code to use the image above function main.c

/***
 main.c
***/
#include<stdio.h>
#include"MyCalc.h"

int main()
{
    int a = 10;
    int b = 20;
    int result = a + b;
    printf("a + b = %d\n",result);
    return 0;
}

Compile and run:

Static library advantages and disadvantages:

View the contents of a static library

nm static library name

nm can view the contents of an executable program

 

advantage:

1. 发布程序的时候，不需要提供对应的库
2. 库的加载速度比较快

缺点：

1. 库打包到应用程序中，库的体积很大
2. 库发生了变化，需要重新编译程序。