Re: [Vala] undefined reference to 'SDL_Init' and/or 'WinMain 16' (under Windows)

[Sam Thursfield <ssssam gmail com>]

Hi

On Mon, Mar 19, 2012 at 3:06 PM,  <Raum no-log org> wrote:
> Well, I've corrected my command line with -X option :
> -------------------------------
> > valac --pkg sdl -X -lsdl test2.vala
> c:/vala-0.12.0/lib/libmingw32.a(main.o):main.c:(.text+0xbd): undefined
> reference to `WinMain 16'
> collect2: ld returned 1 exit status
> error: cc exited with status 1
> Compilation failed: 1 error(s), 0 warning(s)
> ---------------------------------
>
> So I've linked my code with sdl library but I've got the last error
> undefined reference to `WinMain 16' for libmingw32.a
>
> Any advice ? :)
>
> Thanks
>
> > Hi,
> >
> > I'm testing Vala and I think I didn't understand how to use package with
> > it... I want to use SDL and SDLNet but I've got an "undefined
> > reference"...
> >
> > Here is my test program :
> > --------------------
> > using GLib;
> > using SDL;
> >
> > int main (string[] args) {
> >     SDL.init( 0 );
> >
> >     SDL.quit( );
> >     stdout.printf ("Hello world!");
> >     return 0;
> > }
> > --------------------
> >
> > My command line to compile :
> > ---------------------
> > > valac --pkg sdl test.vala
> > (...)\LOCALS~1\Temp/cconhiY1.o:test.vala.c:(.text+0x15): undefined
> > reference to `SDL_Init'
> > (...)\LOCALS~1\Temp/cconhiY1.o:test.vala.c:(.text+0x1a): undefined
> > reference to `SDL_Quit'
> > c:/vala-0.12.0/lib/libmingw32.a(main.o):main.c:(.text+0xbd): undefined
> > reference to `WinMain 16'
> > collect2: ld returned 1 exit status
> > error: cc exited with status 1
> > Compilation failed: 1 error(s), 0 warning(s)
> > --------------------
> >
> > But this sample below just compile without any error with the same command
> > line :
> > --------------------------------------
> > using GLib;
> > using SDL;
> >
> > int main (string[] args) {
> >    stdout.printf ("Hello world!");
> >    return 0;
> > }
> > --------------------------------------
> >
> > Result :
> > -----------------------
> > > > valac --pkg sdl test2.vala
> >
> > > > test2
> > Hello world!
> > ----------------------
> >
> > Where am i wrong ?
> >
> > Thanks !

I forget the exact magic needed for mingw, maybe you need to add -X
-mwindows to the command line?

If not, add --verbose to your vala commandline and post the full gcc
commandline that's being used, that may be useful

Sam