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User forums => Help => Topic started by: aboeing on June 16, 2009, 05:38:33 am

Title: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: aboeing on June 16, 2009, 05:38:33 am

Hi,

I am trying to compile a sample SDL program, and I keep getting a:
undefined reference to `_WinMain@16'
problem.

I am using the SDL 1.2.13 mingw build from http://www.libsdl.org/download-1.2.php
SDL-devel-1.2.13-mingw32.tar.gz (Mingw32)

And a SDL sample program from here:
http://friedspace.com/SDLTest.c

This is the command line the compiler is using:
mingw32-g++.exe -LC:\lib\SDL-1.2.13\lib  -o "bin\Debug\sdl test.exe" obj\Debug\main.o    C:\lib\SDL-1.2.13\lib\libSDL.dll.a C:\lib\SDL-1.2.13\lib\libSDLmain.a

This is the output:
C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../libmingw32.a(main.o):main.c:(.text+0x104): undefined reference to `_WinMain@16'
collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 0 seconds)
1 errors, 0 warnings

I have set the project to 'console' and set the include directory for SDL and added libSDL.dll.a and libSDLmain.a libraries.

Does anyone know how to solve the undefined reference problem?

Title: Re: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: Jenna on June 16, 2009, 07:17:48 am

Did you do a forums search (http://forums.codeblocks.org/index.php?action=search2&search=%22undefined+reference+to+%60_WinMain%4016%27%22) ?

One Thread it gives me is: http://forums.codeblocks.org/index.php/topic,7580.0.html (http://forums.codeblocks.org/index.php/topic,7580.0.html) .

Maybe this helps.

Title: Re: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: aboeing on June 16, 2009, 08:08:14 am

Yes, I did a search and saw that topic. I've tried adding '-lmingw32 -lSDLmain -lSDL -mwindows' to the compiler options, but that did not help.

Title: Re: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: MortenMacFly on June 16, 2009, 08:17:05 am

Quote from: aboeing on June 16, 2009, 08:08:14 am

Yes, I did a search and saw that topic. I've tried adding '-lmingw32 -lSDLmain -lSDL -mwindows' to the compiler options

This is not a compiler, but a linker option. Please post the full build log to see if that helps... probably a sample project would be best.

Title: Re: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: aboeing on June 17, 2009, 03:34:39 am

This is the full build log:

mingw32-g++.exe -LC:\lib\SDL-1.2.13\lib  -o "bin\Debug\sdl test.exe" obj\Debug\main.o    C:\lib\SDL-1.2.13\lib\libSDL.dll.a C:\lib\SDL-1.2.13\lib\libSDLmain.a
C:/Program Files/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../libmingw32.a(main.o):main.c:(.text+0x104): undefined reference to `_WinMain@16'
collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 0 seconds)
1 errors, 0 warnings

I can't attach the codeblocks project, it says the board is full.

Title: Re: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: aboeing on June 17, 2009, 03:40:24 am

I have uploaded the codeblocks project with source here:
http://www.adrianboeing.com/tmp/sdl%20test.zip

Title: Re: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: MortenMacFly on June 17, 2009, 11:37:54 am

Quote from: aboeing on June 17, 2009, 03:40:24 am

I have uploaded the codeblocks project with source here:
http://www.adrianboeing.com/tmp/sdl%20test.zip

Link against "mingw32" first. Next time you can try to use the wizard to create a project template for you. Cause that's what I have done and it just worked. ;-)

Title: Re: SDL and Codeblocks/MinGW - WinMain undefined reference
Post by: aboeing on June 19, 2009, 04:29:26 am

Thanks MortenMacFly! That was it, I had the dependencies in the wrong order:

for future reference this is the order you must have:
-lmingw32
-lSDLmain
-lSDL