Win98 SDL and Qt conflicts

SDL Development
1

Hi,

Thanks for releasing the excellent SDL libraries for different OSes!!
I use Qt library for the user interface and SDL for displaying decoded
MPEG4 frame. I have no problem running my program in Linux until
recently I tried to compiled in win98 using VC++.

The problem I think is that both qt and SDL lib. convert the main function
into Winmain function recognised by windows.

Initially when I compiled with
my main funtion with VC++ as:

int main( int argc, char **argv )

It complains that:

qt.lib(qapplication_win.obj) : error LNK2001: unresolved external symbol
_main

I believe the problem lies in SDL converting the main statement to RunMain
statemant when compiling in windows environment. So, I have tried adding
undefine statement before my main function as:

#undef main
int main(int argc, char **argv)
{
QApplication a(argc,argv);
// …
}

It compiled successfully but SDL_init() gives error i.e.
SDL_Init(SDL_INIT_VIDEO) < 0 .

Please help.

Regards,
Keng Pang

2

Hi,

Thanks for releasing the excellent SDL libraries for different OSes!!

You’re welcome!

I use Qt library for the user interface and SDL for displaying decoded
MPEG4 frame. I have no problem running my program in Linux until
recently I tried to compiled in win98 using VC++.

The problem I think is that both qt and SDL lib. convert the main function
into Winmain function recognised by windows.

Actually, it doesn’t convert it into WinMain().
I only recently got it working properly with VC++ under Win98.
Try grabbing the latest CVS snapshot from
http://www.devolution.com/~slouken/SDL/download.html

Include SDL.h in your main file, and declare main as:
main(int argc, char *argv[])
Remember not to use a return type, otherwise it will not compile.

I’m not sure how to get it to work with Qt, if Qt takes over WinMain.

Can you send me your code and a sample datafile, so I can take a look?
BTW, you might want to join the SDL mailing list, which is a good place
to ask questions like these. To join, just send e-mail to:
sdl-subscribe at surfnetcity.com.au

Also, I can link to your application from my download page, if you feel
it’s ready for public viewing. :slight_smile:

Regards,
Keng Pang

-Sam Lantinga				(slouken at devolution.com)

Lead Programmer, Loki Entertainment Software–
“Any sufficiently advanced bug is indistinguishable from a feature”
– Rich Kulawiec