kconfig: add defconfig_list/module option

This makes it possible to change two options which were hardcoded sofar.
1. Any symbol can now take the role of CONFIG_MODULES
2. The more useful option is to change the list of default file names,
   which kconfig uses to load the base configuration if .config isn't
   available.

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, 9 insertions, 1 deletions

diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 9d08582f2aa6..ab44feb3c600 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -481,7 +481,9 @@ void conf_parse(const char *name)
 
         sym_init();
         menu_init();
-        modules_sym = sym_lookup("MODULES", 0);
+        modules_sym = sym_lookup(NULL, 0);
+        modules_sym->type = S_BOOLEAN;
+        modules_sym->flags |= SYMBOL_AUTO;
         rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
 
 #if YYDEBUG
@@ -491,6 +493,12 @@ void conf_parse(const char *name)
         zconfparse();
         if (zconfnerrs)
                 exit(1);
+        if (!modules_sym->prop) {
+                struct property *prop;
+
+                prop = prop_alloc(P_DEFAULT, modules_sym);
+                prop->expr = expr_alloc_symbol(sym_lookup("MODULES", 0));
+        }
         menu_finalize(&rootmenu);
         for_all_symbols(i, sym) {
                 sym_check_deps(sym);