kconfig: add symbol option config syntax

This adds the general framework to the parser to define options for config
symbols with a syntax like:

config FOO
	option bar[="arg"]

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 1f61fba6aa28..9d08582f2aa6 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -71,6 +71,7 @@ static struct menu *current_menu, *current_entry;
 %token <id>T_DEFAULT
 %token <id>T_SELECT
 %token <id>T_RANGE
+%token <id>T_OPTION
 %token <id>T_ON
 %token <string> T_WORD
 %token <string> T_WORD_QUOTE
@@ -91,6 +92,7 @@ static struct menu *current_menu, *current_entry;
 %type <id> end
 %type <id> option_name
 %type <menu> if_entry menu_entry choice_entry
+%type <string> symbol_option_arg
 
 %destructor {
         fprintf(stderr, "%s:%d: missing end statement for this entry\n",
@@ -173,6 +175,7 @@ menuconfig_stmt: menuconfig_entry_start config_option_list
 config_option_list:
           /* empty */
         | config_option_list config_option
+        | config_option_list symbol_option
         | config_option_list depends
         | config_option_list help
         | config_option_list option_error
@@ -215,6 +218,26 @@ config_option: T_RANGE symbol symbol if_expr T_EOL
         printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 };
 
+symbol_option: T_OPTION symbol_option_list T_EOL
+;
+
+symbol_option_list:
+          /* empty */
+        | symbol_option_list T_WORD symbol_option_arg
+{
+        struct kconf_id *id = kconf_id_lookup($2, strlen($2));
+        if (id && id->flags & TF_OPTION)
+                menu_add_option(id->token, $3);
+        else
+                zconfprint("warning: ignoring unknown option %s", $2);
+        free($2);
+};
+
+symbol_option_arg:
+          /* empty */           { $$ = NULL; }
+        | T_EQUAL prompt        { $$ = $2; }
+;
+
 /* choice entry */
 
 choice: T_CHOICE T_EOL