Use GCC to create static and dynamic link libraries in Linux

The previous article introduced how to create a static Link Library and dynamic link library (http://blog.csdn.net/love_cppandc/article/details/8502773) in windows, this article describes how to create a static Link Library and dynamic link library in Linux.

In Linux, the static library file ends with. A and the dynamic library file ends with. So.

1. Static Link Library

First, create three files: static. H static. C test. C.

Static. c

int add( int a, int b ){return a + b;}

Static. h

#ifndef LIB_H#define LIB_Hint add(int a,int b);#endif

Test. c

#include <stdio.h>#include "static.h"int main(){printf( "%d\n", add(1,2) );return 0;}

The command is as follows:

# Gcc-C static. c

This step is to generate the static. o file.

# Ar Cr libstatic. A static. o

This step generates a static Link Library. Note that the library name must start with Lib. This is required!

# Gcc-O test. C-L.-lstatic

In this step, link the static library with the test file. The. In-L. represents the current directory.

#./Test

Result 3

2. Dynamic Link Library

Create three files: Dynamic. c dynamic. h test. c

Dynamic. c

int add( int a,int b ){return a + b;}

Dynamic. h

#ifndef DYNAMIC#define DYNAMICint add( int a,int b);#endif

Test. c

#include <stdio.h>#include "dynamic.h"int main(){printf( "%d\n",add(1,2) );return 0;}

The command is as follows:

# Gcc-C dynamic. c

This step is to generate the dynamic. So file

# Gcc-shared-fpci-O libdynamic. so dynamic. So

This step is to generate a dynamic link library

# Gcc-O test. C-L.-ldynamic

This step links the dynamic library to the test file.

#./Test

Result 3

Conclusion: We found that the GCC commands for calling static and dynamic link libraries are the same, and it can be determined that when there is a static and dynamic library with the same name, give priority to dynamic libraries.