Re: gtk test programs core dump

[Ron Steinke <rsteinke w-link net>]

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> From: ERDI Gergo <cactus cactus rulez org>
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> To: Brian Cameron <Brian Cameron Sun COM>
> Cc: gtk-devel-list gnome org
> Subject: Re: gtk test programs core dump
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> Date: Fri, 22 Jun 2001 19:03:46 +0200 (CEST)
> X-UIDL: 8a201d3cb3ec8118a0f7b3e785b44ac0
> Status: R
>
> On Fri, 22 Jun 2001, Brian Cameron wrote:
>
> > Erdi:
>
> oh btw Gergo is the first name (don't feel bad about it, noone gets it
> right:)
>
> > > does this `controleld environment' start from scratch each day?
> > 
> > Yes sir.
>
> This can't be. Your GTK+ is compiled with different headers than your
> installed glib. For example, let's say GObject is defined like this:
>
> struct GObject
> {
> 	int old_field;
> 	int new_field1;
> 	int new_field2;
> }
>
> and there is a derived object, GFoo, in libgfoo:
>
> struct GFoo
> {
> 	GObject parent
>
> 	int foo_field;
> }
>
> if you compiled libgfoo with the old glib headers,
> sizeof(GFoo)==sizeof(GObject)+sizeof(int)==2*sizeof(int). If you compiled
> libgfoo with the new glib headers,
> sizeof(GFoo)==sizeof(GObject)+sizeof(int)==4*sizeof(int).
> So runnign the old libgfoo with the new glib will mean that
> sizeof(GObject)==3, yet sizeof(GFoo)=2, and this can't be since GFoo is
> derived from GObject so it should include GObject which means it should be
> at least as big as GObject.
>
> Hope this explanation helps
> 	
>
> -- 
>    .--= ULLA! =---------------------.   `We are not here to give users what
>    \     http://cactus.rulez.org     \   they want'  -- RMS, at GUADEC 2001
>     `---= cactus cactus rulez org =---'
> Gravity doesn't exist: the earth sucks.
>
>
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