linux-kernel - Re: kconfig: error out if recursive dependencies are found

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Message-ID: <20070507193707.GA19985@uranus.ravnborg.org>
Date:	Mon, 7 May 2007 21:37:07 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Roman Zippel <zippel@...ux-m68k.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Adrian Bunk <bunk@...sta.de>
Subject: Re: kconfig: error out if recursive dependencies are found

On Mon, May 07, 2007 at 02:38:36AM +0200, Roman Zippel wrote:
> Hi,
> 
> On Sun, 6 May 2007, Sam Ravnborg wrote:
> 
> >  	if (sym->flags & SYMBOL_CHECK) {
> > -		printf("Warning! Found recursive dependency: %s", sym->name);
> > +		fprintf(stderr, "%s:%d:error: found recursive dependency: %s",
> > +		        sym->prop->file->name, sym->prop->lineno, sym->name);
> >  		return sym;
> >  	}
> 
> If it were that simple to print the location, I had done it already. :)
> Try this:
> 
> config FOO
>         bool
>         select BAR
>         depends on BAR
> 
> config BAR
>         bool
> 
> I looked into this before, for simple properties one could just remember 
> the last checked property via a static variable. The problem are the 
> selects which are checked before that loop, here the information from 
> where they were selected is not available anymore (at least not easily).

We need to point out _one_ of the faulty spots only.
But I see that kconfig records file:line for properties and menu entries
but not for symbols.
Any special reason why file:line is omitted for symbols (except size of allocated
memory)?

Without looking into details it looks more relevant to have file:line for symbols
rather than for prompts / properties..

	Sam
-
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