问题描述
我已经开始尝试在 Xcode 4.3.2 中使用 SDL，所以我为 Mac OS X 启动了一个 Cocoa 应用程序，并连接了我所有的框架:OpenGL、SDL 等.我没有 SDL_Image、SDL_Mixer 等(我有吗?需要这些吗?)当我尝试编译只有 SDLmain.h 和 SDLmain.m 的项目时，出现此错误:
I have started trying to use SDL in Xcode 4.3.2 so I started up a Cocoa application for Mac OS X and connected all my frameworks : OpenGL, SDL etc. I don't have SDL_Image, SDL_Mixer etc. (Do I need these?) When I try to compile the project that just has SDLmain.h and SDLmain.m I get this error:
Undefined symbols for architecture x86_64: "_SDL_main", referenced from: -[SDLMain applicationDidFinishLaunching:] in SDLMain.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
推荐答案
我在 Xcode 4.5 和 OS X 10.7 上使用 SDL 1.2.15 时遇到了同样的问题，结果是我添加了 SDLMain.m 和 SDLMain.h(根据 libSDL 网站上有关 OS X 框架的建议)添加到与 main 混淆的现有 SDL 项目.最重要的是，您不需要这些文件只是因为您使用的是 Cocoa——SDL 自己的测试应用程序也不使用它，并且在 OS X 上运行得很好.
I was having the same issue with SDL 1.2.15 on Xcode 4.5 and OS X 10.7, turned out the problem was that I added SDLMain.m and SDLMain.h (according to a suggestion on the libSDL website about OS X frameworks) to an existing SDL project which messed up with main. Bottom line is that you don't need those files just because you are using Cocoa -- SDL's own test apps don't use it either and run just fine on OS X.
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