使用mingw制作dll文件

时间:2024-03-03 11:14:08

使用mingw制作dll文件

  • 安装mingw

  • 准备math.c文件

    //math.c
    #include<stdio.h>
    int add(int a,int b){
        return a+b;
    }
    int sub(int a,int b){
        return a-b;
    }
    int mul(int a,int b){
        return a*b;
    }
    int div(int a,int b){
        return a/b;
    }
    
  • 制作dll

    gcc math.c -shared -o math.dll -Wl,--out-implib,math.lib
    

    生成 math.dll、math.lib

  • 验证dll

    • 编写加载dll文件的代码

       #include<stdio.h>
       #include <windows.h>
       typedef int (*AddFunc)(int ,int);
       typedef int (*SubFunc)(int ,int);
       typedef int (*MulFunc)(int ,int);
       typedef int (*DivFunc)(int ,int);
       int main(void)
       {
             int a=10,b=2;
             HMODULE hDll = LoadLibrary("math.dll");
             if (hDll != NULL)
             {
                   AddFunc add = (AddFunc)GetProcAddress(hDll, "add");
                   SubFunc sub = (SubFunc)GetProcAddress(hDll, "sub");
                   MulFunc mul = (MulFunc)GetProcAddress(hDll, "mul");
                   DivFunc div = (DivFunc)GetProcAddress(hDll, "div");
      
                   if (add != NULL)
                      printf("a+b=%d\n",add(a,b));
                   if (sub != NULL)
                      printf("a-b=%d\n",sub(a,b));
                   if (mul != NULL)
                      printf("a*b=%d\n",mul(a,b));
                   if (div != NULL)
                      printf("a/b=%d\n",div(a,b));
      
                   FreeLibrary(hDll);
             }
       }
      
    • 编译 gcc loaddll_dynamic_show.c -o loaddll_dynamic_show.exe

    • 运行 loaddll_dynamic_show.exe

    • 结果

      a+b=12
      a-b=8
      a*b=20
      a/b=5