Re: cannot install...

[Richard Frith-Macdonald]

On 16 Feb 2009, at 16:35, Fred Kiefer wrote:

> Ricardo Strausz wrote:
> > NSGraphicsContext.m: In function 'GSCurrentContext':
> > NSGraphicsContext.m:93: warning: instance variable '_gcontext' is
> > @private; this will be a hard error in the future
> > NSGraphicsContext.m: In function '+[NSGraphicsContext  
> > setCurrentContext:]':
> > NSGraphicsContext.m:162: error: instance variable '_gcontext' is
> > declared private
> > NSGraphicsContext.m:162: error: instance variable '_gcontext' is
> > declared private
> > gnumake[2]: *** [obj/NSGraphicsContext.m.o] Error 1
> > gnumake[1]: *** [libgnustep-gui.all.library.variables] Error 2
> > gnumake: *** [internal-all] Error 2
> >
> > Error: Status 1 encountered during processing.
>
> This looks like an actual bug in GNUstep, one which went unnoticed  
> as no
> other compiler complained about it. We set a private instance variable
> of NSThread via the trick of defining a structure that maps the  
> internal
> layout of NSThread.
> The problem is I don't have any other idea how to do this :-(

That's not a GNUstep bug.  The code there is using @defs for its  
intended purpose.  It's explicitly documented as making all the  
instance variables public in the ObjC language reference (I just  
checked the copy from my old NeXTstep system to be absolutely sure).

So what we have is a compiler bug.

Unfortunately, saying it's a compiler bug doesn't help us much.  You  
could try messing around with declarations to see if you can avoid  
triggering the compiler bug by doing something differently, or  
alternatively try hacking the declaration of NSThread so the ivar is  
declared public (perhaps we should just do that anyway).