SDL 2 Undefined Reference to “WinMain@16” and several SDL functions

问题

I've just installed SDL 2 and I have some serious problems. This is my code:

#include <SDL2\SDL.h>

int main(int argc, char* argv[]){
SDL_Init( SDL_INIT_VIDEO );
SDL_Quit();
return 0;
}

I am unable to compile because I get the error described in the title:

obj\Debug\main.o||In function SDL_main':|  
C:\Users\myuser\Desktop\test 2000\main.cpp|5|undefined reference to SDL_Init'|
C:\Users\myuser\Desktop\test 2000\main.cpp|7|undefined reference to SDL_Quit'|
c:\program files\codeblocks\mingw\bin\..\lib\gcc\mingw32\4.4.1\..\..\..\libmingw32.a(main.o):main.c|| undefined reference to WinMain@16'|  
||=== Build finished: 3 errors, 0 warnings ===|

回答1:

post the compiler commands. ex: g++/gcc ....

you are probably not linking the library.

http://content.gpwiki.org/index.php/SDL:Tutorials:Setup you should have the path to the lib, included in the ide. (I see you are using codeblocks)

add to the linker settings: -lmingw32 -lSDLmain -lSDL

http://www.sdltutorials.com/sdl-tutorial-basics

回答2:

I think you want

#define SDL_MAIN_HANDLED

in your main file, BEFORE the line

#include <SDL2/SDL.h>

from: https://stackoverflow.com/a/32343111/5214543

回答3:

Although the accepted answer works (if you follow it exactly, or read the comments), there's one caveat: You have to follow the order of linking libraries as given

g++ 01_hello_SDL.cpp -I{add correct path here}/include/SDL2 -L{add correct path here}/lib -lmingw32 -lSDL2main -lSDL2

And if you dont want a console to run alongside the window, add -mwindows to the options

回答4:

You need to add these to linker libraries with the same order:

mingw32
SDL2main
SDL2

Note that the order is important.

回答5:

I struggled with this forever.

Simply move the sdl files out of your program files to your desktop or documents etc and link them to C from there.

Think it has something to do with Windows not allowing C to access them or something.

Hope this helps Cool

回答6:

I solved this by exchanging the

int main(int argc, char* argv[])

line with

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow )

No idea why to be honest, then again I moved on to the SFML.

来源：https://stackoverflow.com/questions/17048072/sdl-2-undefined-reference-to-winmain16-and-several-sdl-functions

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sdl