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

[Raum no-log org]

Really strange...

This code below is correct and a window appears !
==================================
using GLib;
using SDL;

int WinMain(string[] argc)
{
        SDL.Surface *screen;

    if( SDL.init( InitFlag.VIDEO ) < 0 )
    {
        stdout.printf( "Impossible d'initialiser SDL:  %s\n",
SDL.get_error( ) );
        return 1;
    }


    screen = SDL.Screen.set_video_mode( 640, 480, 16,
SurfaceFlag.HWSURFACE );
        SDL.WindowManager.set_caption ("Vala SDL Demo", "");

    if( screen == null )
    {
        stdout.printf( "Impossible d'initialiser le mode video: %s\n",
SDL.get_error( ) );
        return 1;
    }

    SDL.Timer.delay( 3000 );
    SDL.quit();
    return 0;
}


int main(string[] argc )
{
                stdout.printf ("not printed\n");

                return 0;
}
=========================================

The "main" function is not called and I've got two warnings :
Compilation time :
test2.vala:5.1-5.11: warning: method `WinMain' never used
int WinMain(string[] argc)

Linking time :
Warning: resolving _WinMain 16 by linking to _WinMain

I need to have these two function "main" and "winmain"... :-?

Ehm...

Thanks


> Hi
> WinMain usually is the entry point for Win32 programs (isntead of
> main()). If you do not have such a function defined in your C-Code you
> get the
> the error message you described. At least that's the experience I have
> with that error message with pure C an WinAPI
>
> regards
> andi
>
>
>
> Am 20.03.2012 12:06, schrieb Raum no-log org:
> > Ehm.. I don't have any idea or any clue....
> >
> > I've tried to create C code and compile it :
> > -----------------------------------------------------
> > /* test2.c generated by valac 0.12.0, the Vala compiler
> >   * generated from test2.vala, do not modify */
> > #include<glib.h>
> > #include<glib-object.h>
> > #include<stdlib.h>
> > #include<string.h>
> > #include<SDL.h>
> > #include<stdio.h>
> >
> > gint _vala_main (gchar** argc, int argc_length1);
> >
> > gint _vala_main (gchar** argc, int argc_length1) {
> >      gint result = 0;
> >      SDL_Init ((guint32) 0);
> >      SDL_Quit ();
> >      fprintf (stdout, "Hello world!");
> >      result = 0;
> >      return result;
> > }
> >
> > int main (int argc, char ** argv) {
> >      g_type_init ();
> >      return _vala_main (argv, argc);
> > }
> > -------------------------------------------------
> >
> > And I've got the same error (which is not surprising...) :
> > gcc -o C:/vala\test2 C:/vala/test2.vala.c -mms-bitfields
> > -Ic:/vala/include/glib-2.0 -Ic:/vala/lib/glib-2.0/include  -Lc:/vala/lib
> > -lgobject-2.0 -lgthread-2.0 -lglib-2.0 -lintl -lSDL -lSDLmain -lmingw32
> > -mwindows
> > c:/vala/lib/libmingw32.a(main.o):main.c:(.text+0xbd): undefined
> > reference
> > to `WinMain 16'
> > collect2: ld returned 1 exit status
> >
> >
> > > Hello,
> > >
> > > 2012/3/20<Raum no-log org>:
> > > > Perhaps a basic linkage error but I dont know how to correct :D
> > > You should be looking at the SDL FAQ for Windows:
> > > http://wiki.libsdl.org/moin.cgi/FAQWindows
> > >
> > > For example this question seems to be exactly what you want (don't
> > > forget -X before each argument):
> > >
> > > I get "Undefined reference to 'WinMain 16'"
> > > Under Visual C++, you need to link with SDLmain.lib. Under the gcc
> > > build environments including Dev-C++, you need to link with the output
> > > of "sdl-config --libs", which is usually: -lmingw32 -lSDLmain -lSDL
> > > -mwindows
> > _______________________________________________
> > vala-list mailing list
> > vala-list gnome org
> > http://mail.gnome.org/mailman/listinfo/vala-list