From: Arnaud Lacombe <lacombar@gmail.com>
Date: Tue, 17 Aug 2010 02:55:31 +0000 (-0400)
Subject: kconfig: implement the `mainmenu' directive
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8ea13e2c87c83b7cb0b360cb8779415967727647;p=linux-beck.git

kconfig: implement the `mainmenu' directive

If specified, the directive must be placed at the top of the Kconfig file.

We need to change the grammar to make the mainmenu directive set the
`rootmenu' prompt. This reflect how menu_add_prompt() works internally, ie.
set the prompt of the `current_entry', pointing originally to `rootmenu'.

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Michal Marek <mmarek@suse.cz>
---

diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt
index b472e4e0ba67..2fe93ca7c77c 100644
--- a/Documentation/kbuild/kconfig-language.txt
+++ b/Documentation/kbuild/kconfig-language.txt
@@ -322,7 +322,8 @@ mainmenu:
 	"mainmenu" <prompt>
 
 This sets the config program's title bar if the config program chooses
-to use it.
+to use it. It should be placed at the top of the configuration, before any
+other statement.
 
 
 Kconfig hints
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 23dfd3baa7a1..e9b14efd7414 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -36,7 +36,7 @@ static struct menu *current_menu, *current_entry;
 #define YYERROR_VERBOSE
 #endif
 %}
-%expect 26
+%expect 28
 
 %union
 {
@@ -104,14 +104,15 @@ static struct menu *current_menu, *current_entry;
 %}
 
 %%
-input: stmt_list;
+input: nl start | start;
+
+start: mainmenu_stmt stmt_list | stmt_list;
 
 stmt_list:
 	  /* empty */
 	| stmt_list common_stmt
 	| stmt_list choice_stmt
 	| stmt_list menu_stmt
-	| stmt_list T_MAINMENU prompt nl
 	| stmt_list end			{ zconf_error("unexpected end statement"); }
 	| stmt_list T_WORD error T_EOL	{ zconf_error("unknown statement \"%s\"", $2); }
 	| stmt_list option_name error T_EOL
@@ -342,6 +343,13 @@ if_block:
 	| if_block choice_stmt
 ;
 
+/* mainmenu entry */
+
+mainmenu_stmt: T_MAINMENU prompt nl
+{
+	menu_add_prompt(P_MENU, $2, NULL);
+};
+
 /* menu entry */
 
 menu: T_MENU prompt T_EOL