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Another SDL "Entry point must be defined" error.

Started by Drakkcon Oct 7, 2007 at 3:03 PM 6 replies 2.8k views

Original Post

Oct 7, 2007 at 3:03 PM

Okay, this error seems pretty common, so I've been searching for solutions for the past hour and none have helped. I am using Visual C++ 2005 and SDL, and getting the error "LNK1561: entry point must be defined". Now: -I have linked against sdlmain.lib -I am using a multi-threaded debug .dll for my C runtime -I have tried both unicode and multibyte character sets -I have made sure that I am using the proper version of the library (VC8) -I have set up my project as a Win32 project, empty, with no precompiled headers -I am about to slam my keyboard into my monitor. So can anyone tell me what else there is to do?

Oluseyi

Oct 7, 2007 at 3:07 PM

Do you use main() or WinMain()?

Lazy Foo

Oct 7, 2007 at 3:07 PM

Did you link against both sdl.lib and sdlmain.lib?

Atridas

Oct 7, 2007 at 3:08 PM

You have to use the SDL_main instead of main or winmain or wethever

int SDL_main( int argc, char* args[] ){return 0;}

Drakkcon

Oct 7, 2007 at 3:09 PM

I have linked with sdl.lib and sdlmain.lib.

My main function looks like this:

int main(int, char**) { return 0; }

Edit: Using SDL_main doesn't fix the problem.

SiCrane

Oct 7, 2007 at 3:17 PM

As a last resort, if you've downloaded the SDL source, you can try adding SDL_win32_main.c from the src/main/win32 directory to your project.

Drakkcon

Oct 7, 2007 at 4:14 PM

Wow, SiCrane, that worked perfectly! I'm not really sure why this is necessary though. Shouldn't SDL_Win32_main.o be linked in with sdlmain.lib? Why do I have to do this manually? Would the problem also be fixed if I built the source from scratch instead of downloading the precompiled VC8 library?

SiCrane

Oct 7, 2007 at 4:31 PM

Quote:
Original post by Drakkcon
Shouldn't SDL_Win32_main.o be linked in with sdlmain.lib?

Yes, it should. (Well .obj and not .o, but you get the idea.)

Quote:
Why do I have to do this manually?

I've no idea.

Quote:
Would the problem also be fixed if I built the source from scratch instead of downloading the precompiled VC8 library?

It's worth a shot. IIRC, the SDL people have released bum binary distributions before, but usually they fix it pretty quickly. Then again, I don't have any first hand experience with that; I always build the distribution from source and have never had any problems like this.

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