linux-kernel - Re: [PATCH] Allow kconfig to accept overrides

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Date:	Fri, 12 Oct 2007 14:49:35 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
CC:	zippel@...ux-m68k.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	sam@...nborg.org
Subject: Re: [PATCH] Allow kconfig to accept overrides

Jan Engelhardt wrote:
> Allow config variables in .config to override earlier ones in the same
> file. In other words,
> 
> 	# CONFIG_SECURITY is not defined
> 	CONFIG_SECURITY=y
> 
> will activate it. This makes it a bit easier to do
> 
> 	(cat original-config myconfig myconfig2 ... >.config)
> 
> and run menuconfig as expected.

This is a feature that we want IMO, but I already do this without having
a patch for it (although to a lesser degree than full config files;
I just cat a few entries to the end of a config file then run oldconfig)...
so are there some cases where it works and some cases
where it doesn't work?  Do you know what those cases are?


> Previously sent:
> 	http://lkml.org/lkml/2006/10/25/81
> 	http://lkml.org/lkml/2007/4/1/175
> 
> Signed-off-by: Jan Engelhardt <jengelh@....de>
> Cc: Sam Ravnborg <sam@...nborg.org>
> Cc: Roman Zippel <zippel@...ux-m68k.org>
> Cc: Randy Dunlap <randy.dunlap@...cle.com>
> 
> ---
>  scripts/kconfig/confdata.c |   14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> #
> # Applies cleanly to 2.6.22/23/git.
> #
> Index: linux-2.6.22.1/scripts/kconfig/confdata.c
> ===================================================================
> --- linux-2.6.22.1.orig/scripts/kconfig/confdata.c
> +++ linux-2.6.22.1/scripts/kconfig/confdata.c
> @@ -170,8 +170,7 @@ load:
>  					sym->type = S_BOOLEAN;
>  			}
>  			if (sym->flags & def_flags) {
> -				conf_warning("trying to reassign symbol %s", sym->name);
> -				break;
> +				conf_warning("override: reassigning to symbol %s", sym->name);
>  			}
>  			switch (sym->type) {
>  			case S_BOOLEAN:
> @@ -210,8 +209,7 @@ load:
>  					sym->type = S_OTHER;
>  			}
>  			if (sym->flags & def_flags) {
> -				conf_warning("trying to reassign symbol %s", sym->name);
> -				break;
> +				conf_warning("override: reassigning to symbol %s", sym->name);
>  			}
>  			switch (sym->type) {
>  			case S_TRISTATE:
> @@ -288,11 +286,9 @@ load:
>  				}
>  				break;
>  			case yes:
> -				if (cs->def[def].tri != no) {
> -					conf_warning("%s creates inconsistent choice state", sym->name);
> -					cs->flags &= ~def_flags;
> -				} else
> -					cs->def[def].val = sym;
> +				if(cs->def[def].tri != no)
> +					conf_warning("override: %s turns state choice", sym->name);
> +				cs->def[def].val = sym;
>  				break;
>  			}
>  			cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
> 


-- 
~Randy
-
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