[PATCH] kconfig: preset config during all*config

Allow to force setting of config variables during all{no,mod,yes,random}config
to a specific value.  For that conf first checks the KCONFIG_ALLCONFIG
environment variable for a file name, otherwise it checks for
all{no,mod,yes,random}.config and all.config.  The file is a normal config
file, which presets the config variables, but they are still subject to normal
dependency checks.

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

1 files changed, 30 insertions, 0 deletions

diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index dffbf2ea1f9d..8ba5d29d3d42 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -82,6 +82,15 @@ static void conf_askvalue(struct symbol *sym, const char *def)
         }
 
         switch (input_mode) {
+        case set_no:
+        case set_mod:
+        case set_yes:
+        case set_random:
+                if (sym_has_value(sym)) {
+                        printf("%s\n", def);
+                        return;
+                }
+                break;
         case ask_new:
         case ask_silent:
                 if (sym_has_value(sym)) {
@@ -558,6 +567,27 @@ int main(int ac, char **av)
         case ask_new:
                 conf_read(NULL);
                 break;
+        case set_no:
+        case set_mod:
+        case set_yes:
+        case set_random:
+                name = getenv("KCONFIG_ALLCONFIG");
+                if (name && !stat(name, &tmpstat)) {
+                        conf_read_simple(name);
+                        break;
+                }
+                switch (input_mode) {
+                case set_no:     name = "allno.config"; break;
+                case set_mod:    name = "allmod.config"; break;
+                case set_yes:    name = "allyes.config"; break;
+                case set_random: name = "allrandom.config"; break;
+                default: break;
+                }
+                if (!stat(name, &tmpstat))
+                        conf_read_simple(name);
+                else if (!stat("all.config", &tmpstat))
+                        conf_read_simple("all.config");
+                break;
         default:
                 break;
         }