动态库调用静态库示例讲解

/////// static.h

void static_print();

///////static.cpp

#include <iostream>

#include "static.h"

void static_print() {

     std::cout<<"This is static_print function"<<std::endl;

}

////// shared.h

void shared_print();

////// shared.cpp

#include <iostream>

#include "shared.h"

#include "static.h"

void shared_print() {

       std::cout<<"This is shared_print function";

        static_print();

}

////////test.cpp

   #include "share.h"

int main()
{
       shared_print();
       return 0;
   }

 g++ -c -fPIC static.cpp // 生成static.o

 ar -r libstatic.a static.o // 生成静态库libstatic.a

 g++ -c -fPIC shared.cpp // 生成shared.o

 g++ -shared shared.o -lstatic -o libshared.so   // 生成动态库libshared.so 注: -shared是g++的选项,与shared.o无关. -lstatic选项把libstatic.a的函数加入动态库中.

 g++ test.cpp -lshared -o test.exe // link libshared.so 到test.exe中.
 

 g++ -c static.cpp // 生成static.o

 ar -r libstatic.a static.o // 生成静态库libstatic.a

 g++ -c -fPIC shared.cpp // 生成shared.o

 g++ -shared shared.o -o libshared.so // 生成动态库libshared.so 注: -shared是g++的选项,与shared.o无关. 这时如果加-lstatic. error:relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC

 g++ test.cpp -lshared -lstatic -o test.exe // link libshared.so 到test.exe中.