Question

我有一个使用SDL作为外部库的项目。该项目使用_SDL_WM_SetCaption，_SDL_FillRect或_SDL_MapRGBA等函数。我已告诉链接器包含两个库SDL.lib和SDLmain.lib并告诉它查看放置这些库的文件夹。我还用dumpbin.exe检查了库文件，函数就在那里。但它仍然无法编译/链接？为什么？有人有什么想法吗？

edit：这是链接器/编译器错误的示例输出：



14>libtestd.lib(sdlgl.obj) : error LNK2019: unresolved external symbol _SDL_WM_SetCaption referenced in function "public: void __thiscall SDLGLEngine::SetTitle(char *)" (?SetTitle@SDLGLEngine@@QAEXPAD@Z)
14>libtestd.lib(sdlgl.obj) : error LNK2019: unresolved external symbol _SDL_FillRect referenced in function "public: bool __thiscall SDLGLEngine::Init(int,int,int,bool)" (?Init@SDLGLEngine@@QAE_NHHH_N@Z)
14>libtestd.lib(sdlgl.obj) : error LNK2019: unresolved external symbol _SDL_MapRGBA referenced in function "public: bool __thiscall SDLGLEngine::Init(int,int,int,bool)" (?Init@SDLGLEngine@@QAE_NHHH_N@Z)
14>libtestd.lib(sdlgl.obj) : error LNK2019: unresolved external symbol _SDL_SetVideoMode referenced in function "public: bool __thiscall SDLGLEngine::Init(int,int,int,bool)" (?Init@SDLGLEngine@@QAE_NHHH_N@Z)
14>libtestd.lib(sdlgl.obj) : error LNK2019: unresolved external symbol _SDL_GL_SetAttribute referenced in function "public: bool __thiscall SDLGLEngine::Init(int,int,int,bool)" (?Init@SDLGLEngine@@QAE_NHHH_N@Z)
14>libtestd.lib(sdlgl.obj) : error LNK2019: unresolved external symbol _SDL_Quit referenced in function "public: bool __thiscall SDLGLEngine::Init(int,int,int,bool)" (?Init@SDLGLEngine@@QAE_NHHH_N@Z)
14>libtestd.lib(sdlgl.obj) : error LNK2019: unresolved external symbol _SDL_Init referenced in function "public: bool __thiscall SDLGLEngine::Init(int,int,int,bool)" (?Init@SDLGLEngine@@QAE_NHHH_N@Z)

Answer 1

可能的原因：

sdl.lib和sdlmain.lib设置未添加到依赖关系列表
他们的位置未添加到链接器所在的目录列表
您的32位和64位版本的库不匹配。

未解决的外部符号，即使我认为我正确链接（MSVC）

1 个答案: