使用Visual Studio代码编译SDL2

Question

我一直在尝试为Visual Studio Code建立一个C ++环境，直到我尝试将SDL2与之配合使用为止。我使用的编译器是mingw64中包含的“ g ++”。我为mingw下载了SDL2.09开发库。我将所有头文件复制并粘贴到include文件夹中（这是正确的，因为我没有找到无法找到头文件的错误），然后将libs粘贴到libs文件夹中（编译器也可以找到它们） 。我还复制了dll并将其粘贴到编译代码的目录中。然后，我构建了程序并不断出错。取决于库的顺序，有时是有“ main”或关于winMain的多个定义。有时它说一堆SDL东西是不确定的。但是，每次我运行它时，都一致的是，当我使用SDL_init或任何SDL函数时，都会说该引用未定义。

我已经包括将mingw32库与其他库一起添加。我还尝试过重新排列库的顺序，这样会得到不同错误消息的不同结果，但是没有成功。我曾尝试在eclipse ide中对相同的错误消息进行相同的设置。

  "version": "2.0.0",
  "tasks": [
    {
      "type": "shell",
      "label": "g++_sdl2_build",
      "command": "D:\\Coding\\mingw64\\bin\\g++.exe",
      "args": [
        "-lmingw32",
        "-lSDL2main",
        "-lSDL2",
        "-g",
        "${file}",
        "-o",
        "${fileDirname}\\${fileBasenameNoExtension}.exe",
        "-w"
      ],
      "group": {
        "kind": "build",
        "isDefault": true
      }
    },
    {
      "type": "shell",
      "label": "g++.exe build active file",
      "command": "D:\\Coding\\mingw64\\bin\\g++.exe",
      "args": [
        "-g",
        "${file}",
        "-o",
        "${fileDirname}\\${fileBasenameNoExtension}.exe"
      ],
      "options": {
        "cwd": "D:\\Coding\\mingw64\\bin"
      }
    }
  ]
}

^^^是我的task.json文件，其中是构建文件。

#include <sdl.h>
#include <iostream>

using namespace std;

int main(int argc, char *args[])
{
      if (SDL_Init(SDL_INIT_VIDEO) < 0)
      {
            cout << "SDL init failed" << endl;
            return 1;
      }

      cout << "SDL init successful" << endl;

      SDL_Quit();
      return 0;
}

^^是我尝试编译的cpp文件

尝试构建后出现一个错误：

D:/Coding/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/SDL2main.lib(x64/Release/SDL_windows_main.obj):(.text[main]+0x0): multiple definition of `main'
D:/Coding/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-crt0_c.o):crt0_c.c:(.text.startup+0x0): first defined here
C:\Users\YARHAR~1\AppData\Local\Temp\ccBO9BFb.o: In function `SDL_main':
d:/Coding/Github/cpp_coding/SDL_testing/sdl_test.cpp:8: undefined reference to `SDL_Init'
d:/Coding/Github/cpp_coding/SDL_testing/sdl_test.cpp:16: undefined reference to `SDL_Quit'
collect2.exe: error: ld returned 1 exit status
The terminal process terminated with exit code: 1

切换SDL2和SDL2main库的顺序后的其他错误：

D:/Coding/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/SDL2main.lib(x64/Release/SDL_windows_main.obj):(.text[main]+0x0): multiple definition of `main'
D:/Coding/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-crt0_c.o):crt0_c.c:(.text.startup+0x0): first defined here
D:/Coding/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/SDL2main.lib(x64/Release/SDL_windows_main.obj):(.text[OutOfMemory]+0x1a): undefined reference to `SDL_ShowSimpleMessageBox'
D:/Coding/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/SDL2main.lib(x64/Release/SDL_windows_main.obj):(.text[main_getcmdline]+0xe4): undefined reference to `SDL_SetMainReady'
D:/Coding/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/SDL2main.lib(x64/Release/SDL_windows_main.obj):(.text[main_getcmdline]+0x131): undefined reference to `SDL_ShowSimpleMessageBox'
C:\Users\YARHAR~1\AppData\Local\Temp\ccOsF7gq.o: In function `SDL_main':
d:/Coding/Github/cpp_coding/SDL_testing/sdl_test.cpp:8: undefined reference to `SDL_Init'
d:/Coding/Github/cpp_coding/SDL_testing/sdl_test.cpp:16: undefined reference to `SDL_Quit'
collect2.exe: error: ld returned 1 exit status
The terminal process terminated with exit code: 1

最佳可能的错误情况是，在构建文件中，我不包括mingw32库，并且库的顺序为SDL2main和SDL2。结果是：

C:\Users\YARHAR~1\AppData\Local\Temp\ccjAeK0z.o: In function `SDL_main':
d:/Coding/Github/cpp_coding/SDL_testing/sdl_test.cpp:8: undefined reference to `SDL_Init'
d:/Coding/Github/cpp_coding/SDL_testing/sdl_test.cpp:16: undefined reference to `SDL_Quit'
collect2.exe: error: ld returned 1 exit status
The terminal process terminated with exit code: 1

我希望能够真正成功地编译该程序并使SDL2实际运行。

Answer 1

我遇到了同样的问题，但是改变顺序对我来说不起作用。这是task.json文件：

{
"version": "2.0.0",
"tasks": [
    {
        "type": "shell",
        "label": "clang++ build active file",
        "command": "/usr/bin/clang++",
        "args": [  
            "-g",
            "${file}",
            "-lSDL2",
            "-o",
            "${fileDirname}/${fileBasenameNoExtension}",
        ],
        "options": {
            "cwd": "/usr/bin"
        },
        "problemMatcher": [
            "$gcc"
        ],
        "group": "build"
    }
]
}

这是c时的终端输出

ld：找不到-lSDL2的库clang：错误：链接器命令失败，退出代码为1（使用-v查看调用）终端进程以退出代码终止：1