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

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Date:	Fri, 12 Oct 2007 23:44:08 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	zippel@...ux-m68k.org
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	randy.dunlap@...cle.com, sam@...nborg.org
Subject: [PATCH] Allow kconfig to accept overrides


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.

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);

-
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