build system: fix "allnoconfig" to clear all options. Closes 10296

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 52 insertions, 2 deletions

diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index ea2446a89..e89637e7c 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -76,14 +76,51 @@ static void conf_askvalue(struct symbol *sym, const char *def)
 
         line[0] = '\n';
         line[1] = 0;
+        line[2] = 0;
 
         if (!sym_is_changable(sym)) {
                 printf("%s\n", def);
-                line[0] = '\n';
-                line[1] = 0;
                 return;
         }
 
+        // If autoconf run (allnoconfig and such), reset bool and tristates:
+        // "select ITEM" sets ITEM=y and then parent item might have been
+        // reset to "n" later. Try to set ITEM to "n" on the second run.
+        if (type == S_BOOLEAN || type == S_TRISTATE) {
+                switch (input_mode) {
+                case set_yes:
+                        if (sym_tristate_within_range(sym, yes)) {
+                                line[0] = 'y';
+                                line[1] = '\n';
+                                printf("%s", line);
+                                return;
+                        }
+                case set_mod:
+                        if (type == S_TRISTATE) {
+                                if (sym_tristate_within_range(sym, mod)) {
+                                        line[0] = 'm';
+                                        line[1] = '\n';
+                                        printf("%s", line);
+                                        return;
+                                }
+                        } else {
+                                if (sym_tristate_within_range(sym, yes)) {
+                                        line[0] = 'y';
+                                        line[1] = '\n';
+                                        printf("%s", line);
+                                        return;
+                                }
+                        }
+                case set_no:
+                        if (sym_tristate_within_range(sym, no)) {
+                                line[0] = 'n';
+                                line[1] = '\n';
+                                printf("%s", line);
+                                return;
+                        }
+                }
+        }
+
         switch (input_mode) {
         case set_no:
         case set_mod:
@@ -590,6 +627,19 @@ int main(int ac, char **av)
         if (input_mode != ask_silent) {
                 rootEntry = &rootmenu;
                 conf(&rootmenu);
+                // If autoconf run (allnoconfig and such), run it twice:
+                // "select ITEM" sets ITEM=y and then parent item
+                // is reset to "n" later. Second run sets ITEM to "n".
+                // Example: ADDUSER selects LONG_OPTS.
+                // allnoconfig must set _both_ to "n".
+                // Before, LONG_OPTS remained "y".
+                if (input_mode == set_no
+                 || input_mode == set_mod
+                 || input_mode == set_yes
+                ) {
+                        rootEntry = &rootmenu;
+                        conf(&rootmenu);
+                }
                 if (input_mode == ask_all) {
                         input_mode = ask_silent;
                         valid_stdin = 1;