无法使用MinGW链接到SDL2功能

时间:2013-11-30 17:02:08

标签: c++ mingw sdl codeblocks

我对编程比较陌生,我决定尝试SDL,但我有点卡住了。我无法在代码块中构建项目,并且我得到了所有SDL函数的“未定义引用”。我在这里看到了很多类似的问题,但没有一个解决方案似乎有所帮助。我已经将\ include \ SDL2和\ lib文件夹添加到搜索目录中,我已将SDL2Main和SDL2添加到链接器选项中的链接库中,我甚至将-mwindows添加到其他链接器选项中。此外,我尝试连接64位版本,但事情变得更糟。

这是我的源代码,几乎完全复制了我开始的教程:

#include <SDL.h>
SDL_Window* g_pWindow = 0;
SDL_Renderer* g_pRenderer = 0;
int main(int argc, char* args[])
    {
        // initialize SDL
    if(SDL_Init(SDL_INIT_EVERYTHING) >= 0)
    {
    // if succeeded create our window
        g_pWindow = SDL_CreateWindow("Chapter 1: Setting up SDL",
        SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
        640, 480,
        SDL_WINDOW_SHOWN);
        // if the window creation succeeded create our renderer
        if(g_pWindow != 0)
        {
            g_pRenderer = SDL_CreateRenderer(g_pWindow, -1, 0);
        }
    }
    else
    {
        return 1; // sdl could not initialize
    }
    // everything succeeded lets draw the window
    // set to black // This function expects Red, Green, Blue and
    // Alpha as color values
    SDL_SetRenderDrawColor(g_pRenderer, 0, 0, 0, 255);
    // clear the window to black
    SDL_RenderClear(g_pRenderer);
    // show the window
    SDL_RenderPresent(g_pRenderer);
    // set a delay before quitting
    SDL_Delay(5000);
    // clean up SDL
    SDL_Quit();
        return 0;
}

这是构建日志:

mingw32-g++.exe -LC:\dev\sdl\SDL2-2.0.1\x86_64-w64-mingw32\lib  -o bin\Debug\GeometryProject.exe obj\Debug\main.o   -mwindows  C:\MinGW\lib\libmingw32.a C:\dev\sdl\SDL2-2.0.1\x86_64-w64-mingw32\lib\libSDL2main.a C:\dev\sdl\SDL2-2.0.1\x86_64-w64-mingw32\lib\libSDL2.a 
obj\Debug\main.o: In function `SDL_main':
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:7: undefined reference to `SDL_Init'
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:13: undefined reference to `SDL_CreateWindow'
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:17: undefined reference to `SDL_CreateRenderer'
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:27: undefined reference to `SDL_SetRenderDrawColor'
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:29: undefined reference to `SDL_RenderClear'
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:31: undefined reference to `SDL_RenderPresent'
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:33: undefined reference to `SDL_Delay'
C:/Users/Kris948/Desktop/ProjectsUni/GeometryProject/main.cpp:35: undefined reference to `SDL_Quit'
C:\MinGW\lib\libmingw32.a(main.o):main.c:(.text.startup+0xa7): undefined reference to `WinMain@16'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 0 seconds)
9 errors, 0 warnings (0 minutes, 0 seconds)

还有什么我可以尝试的吗?我真的很想让这个运行起来,并希望得到任何帮助。

2 个答案:

答案 0 :(得分:12)

可能的问题是您链接到SDL2库以获得不同的架构。

您应该使用

SDL2-2.0.1\i686-w64-mingw32

而不是

SDL2-2.0.1\x86_64-w64-mingw32

在设置库搜索路径后,使用此表示法链接到库

-lmingw32 -lSDL2main -lSDL2

它更容易阅读。

答案 1 :(得分:2)

不是添加完整路径,而是尝试-LC:/PATH_TO_SDL -lSDL2main -lSDL2(或只有一个SDL选项);链接器已知lib.a

(不确定是否必须使用/\

由于您使用的是C ++,请将include替换为:

extern "C"
{
    #include "SDL.h"
}

这告诉编译器将SDL视为C - 而不是C ++ - 代码。

另请参阅:SDL2 won't link properly