Update to latest kconfig from linux-2.6.20.7.

I'm not sure of the improvements, but at least we're up-to-date, and updating in the future will be easier.

kconfig/conf.c

@@ -557,7 +557,7 @@ int main(int ac, char **av)
 	case ask_silent:
 		if (stat(".config", &tmpstat)) {
 			printf(_("***\n"
-				"*** You have not yet configured your "PROJECT_NAME"!\n"
+				"*** You have not yet configured "PROJECT_NAME"!\n"
 				"***\n"
 				"*** Please run some configurator (e.g. \"make oldconfig\" or\n"
 				"*** \"make menuconfig\" or \"make xconfig\").\n"
@@ -600,7 +600,7 @@ int main(int ac, char **av)
 			input_mode = ask_silent;
 			valid_stdin = 1;
 		}
-	} else if (sym_change_count) {
+	} else if (conf_get_changed()) {
 		name = getenv("KCONFIG_NOSILENTUPDATE");
 		if (name && *name) {
 			fprintf(stderr, _("\n*** "PROJECT_NAME" configuration requires explicit update.\n\n"));
@@ -613,11 +613,11 @@ int main(int ac, char **av)
 		conf_cnt = 0;
 		check_conf(&rootmenu);
 	} while (conf_cnt);
-
-	if (!conf_write(NULL)) {
-skip_check:
-		return 0;
+	if (conf_write(NULL)) {
+		fprintf(stderr, _("\n*** Error during writing of "PROJECT_NAME" configuration.\n\n"));
+		return 1;
 	}
-	fprintf(stderr, _("\n*** Error writing "PROJECT_NAME" configuration.\n\n"));
-	return 1;
+skip_check:
+
+	return 0;
 }

kconfig/confdata.c

@@ -5,9 +5,7 @@
 
 #include <sys/stat.h>
 #include <ctype.h>
-#include <errno.h>
 #include <fcntl.h>
-#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -23,9 +21,7 @@ static void conf_warning(const char *fmt, ...)
 static const char *conf_filename;
 static int conf_lineno, conf_warnings, conf_unsaved;
 
-#ifndef conf_defname
 const char conf_defname[] = "arch/$ARCH/defconfig";
-#endif
 
 static void conf_warning(const char *fmt, ...)
 {
@@ -104,7 +100,7 @@ int conf_read_simple(const char *name, int def)
 		in = zconf_fopen(name);
 		if (in)
 			goto load;
-		sym_change_count++;
+		sym_add_change_count(1);
 		if (!sym_defconfig_list)
 			return 1;
 
@@ -316,7 +312,7 @@ int conf_read(const char *name)
 	struct expr *e;
 	int i, flags;
 
-	sym_change_count = 0;
+	sym_set_change_count(0);
 
 	if (conf_read_simple(name, S_DEF_USER))
 		return 1;
@@ -368,26 +364,11 @@ int conf_read(const char *name)
 		sym->flags &= flags | ~SYMBOL_DEF_USER;
 	}
 
-	sym_change_count += conf_warnings || conf_unsaved;
+	sym_add_change_count(conf_warnings || conf_unsaved);
 
 	return 0;
 }
 
-struct menu *next_menu(struct menu *menu)
-{
-	if (menu->list) return menu->list;
-	do {
-		if (menu->next) {
-			menu = menu->next;
-			break;
-		}
-	} while ((menu = menu->parent));
-
-	return menu;
-}
-
-#define SYMBOL_FORCEWRITE (1<<31)
-
 int conf_write(const char *name)
 {
 	FILE *out;
@@ -395,7 +376,7 @@ int conf_write(const char *name)
 	struct menu *menu;
 	const char *basename;
 	char dirname[128], tmpname[128], newname[128];
-	int type, l, writetype;
+	int type, l;
 	const char *str;
 	time_t now;
 	int use_timestamp = 1;
@@ -451,20 +432,9 @@ int conf_write(const char *name)
 		     use_timestamp ? "# " : "",
 		     use_timestamp ? ctime(&now) : "");
 
-	if (!sym_change_count)
+	if (!conf_get_changed())
 		sym_clear_all_valid();
 
-	// Write out all symbols (even in closed sub-menus).
-	if (1) {
-		for (menu = rootmenu.list; menu; menu = next_menu(menu))
-			if (menu->sym) menu->sym->flags |= SYMBOL_FORCEWRITE;
-		writetype = SYMBOL_FORCEWRITE;
-
-	// Don't write  out symbols in closed menus.
-
-	} else writetype = SYMBOL_WRITE;
-
-
 	menu = rootmenu.list;
 	while (menu) {
 		sym = menu->sym;
@@ -478,9 +448,9 @@ int conf_write(const char *name)
 				     "#\n", str);
 		} else if (!(sym->flags & SYMBOL_CHOICE)) {
 			sym_calc_value(sym);
-			if (!(sym->flags & writetype))
+			if (!(sym->flags & SYMBOL_WRITE))
 				goto next;
-			sym->flags &= ~writetype;
+			sym->flags &= ~SYMBOL_WRITE;
 			type = sym->type;
 			if (type == S_TRISTATE) {
 				sym_calc_value(modules_sym);
@@ -520,32 +490,29 @@ int conf_write(const char *name)
 			case S_HEX:
 				str = sym_get_string_value(sym);
 				if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
-					fprintf(out, "CT_%s=%s\n", sym->name, *str ? str : "0");
+					fprintf(out, "CT_%s=%s\n", sym->name, str);
 					break;
 				}
 			case S_INT:
 				str = sym_get_string_value(sym);
-				fprintf(out, "CT_%s=%s\n", sym->name, *str ? str : "0");
+				fprintf(out, "CT_%s=%s\n", sym->name, str);
 				break;
 			}
 		}
 
 	next:
-		if (writetype == SYMBOL_WRITE) {
-			if (menu->list) {
-				menu = menu->list;
-				continue;
-			}
-			if (menu->next)
+		if (menu->list) {
+			menu = menu->list;
+			continue;
+		}
+		if (menu->next)
+			menu = menu->next;
+		else while ((menu = menu->parent)) {
+			if (menu->next) {
 				menu = menu->next;
-			else while ((menu = menu->parent)) {
-				if (menu->next) {
-					menu = menu->next;
-					break;
-				}
+				break;
 			}
-		} else
-			menu = next_menu(menu);
+		}
 	}
 	fclose(out);
 
@@ -561,7 +528,7 @@ int conf_write(const char *name)
 		 "# configuration written to %s\n"
 		 "#\n"), newname);
 
-	sym_change_count = 0;
+	sym_set_change_count(0);
 
 	return 0;
 }
@@ -798,3 +765,30 @@ int conf_write_autoconf(void)
 
 	return 0;
 }
+
+static int sym_change_count;
+static void (*conf_changed_callback)(void);
+
+void sym_set_change_count(int count)
+{
+	int _sym_change_count = sym_change_count;
+	sym_change_count = count;
+	if (conf_changed_callback &&
+	    (bool)_sym_change_count != (bool)count)
+		conf_changed_callback();
+}
+
+void sym_add_change_count(int count)
+{
+	sym_set_change_count(count + sym_change_count);
+}
+
+bool conf_get_changed(void)
+{
+	return sym_change_count;
+}
+
+void conf_set_changed_callback(void (*fn)(void))
+{
+	conf_changed_callback = fn;
+}

kconfig/lkc.h

@@ -6,12 +6,6 @@
 #ifndef LKC_H
 #define LKC_H
 
-#define PROJECT_NAME "crosstool-NG"
-
-// Make some warnings go away
-#define YYENABLE_NLS 0
-#define YYLTYPE_IS_TRIVIAL 0
-
 #include "expr.h"
 
 #ifndef KBUILD_NO_NLS
@@ -37,6 +31,7 @@ extern "C" {
 
 #define SRCTREE "srctree"
 
+#define PROJECT_NAME "crosstool-NG"
 #define PACKAGE "crosstool-NG"
 #define LOCALEDIR "/usr/share/locale"
 
@@ -71,6 +66,8 @@ char *zconf_curname(void);
 
 /* confdata.c */
 char *conf_get_default_confname(void);
+void sym_set_change_count(int count);
+void sym_add_change_count(int count);
 
 /* kconfig_load.c */
 void kconfig_load(void);

kconfig/lkc_proto.h

@@ -5,6 +5,8 @@ P(conf_read,int,(const char *name));
 P(conf_read_simple,int,(const char *name, int));
 P(conf_write,int,(const char *name));
 P(conf_write_autoconf,int,(void));
+P(conf_get_changed,bool,(void));
+P(conf_set_changed_callback, void,(void (*fn)(void)));
 
 /* menu.c */
 P(rootmenu,struct menu,);
@@ -16,7 +18,6 @@ P(menu_get_parent_menu,struct menu *,(struct menu *menu));
 
 /* symbol.c */
 P(symbol_hash,struct symbol *,[SYMBOL_HASHSIZE]);
-P(sym_change_count,int,);
 
 P(sym_lookup,struct symbol *,(const char *name, int isconst));
 P(sym_find,struct symbol *,(const char *name));

kconfig/mconf.c

@@ -868,7 +868,7 @@ int main(int ac, char **av)
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);
 
-	conf_parse(av[1] ? av[1] : "");
+	conf_parse(av[1]);
 	conf_read(NULL);
 
 	sym = sym_lookup("PROJECTVERSION", 0);
@@ -890,26 +890,33 @@ int main(int ac, char **av)
 	do {
 		conf(&rootmenu);
 		dialog_clear();
-		res = dialog_yesno(NULL,
-				   _("Do you wish to save your "
-				     "new "PROJECT_NAME" configuration?\n"
-				     "<ESC><ESC> to continue."),
-				   6, 60);
+		if (conf_get_changed())
+			res = dialog_yesno(NULL,
+					   _("Do you wish to save your "
+					     "new "PROJECT_NAME" configuration?\n"
+					     "<ESC><ESC> to continue."),
+					   6, 60);
+		else
+			res = -1;
 	} while (res == KEY_ESC);
 	end_dialog();
-	if (res == 0) {
+
+	switch (res) {
+	case 0:
 		if (conf_write(NULL)) {
 			fprintf(stderr, _("\n\n"
-				"Error writing "PROJECT_NAME" configuration.\n"
-				"Your configuration changes were NOT saved."
+				"Error during writing of "PROJECT_NAME" configuration.\n"
+				"Your kernel configuration changes were NOT saved."
 				"\n\n"));
 			return 1;
 		}
+	case -1:
 		printf(_("\n\n"
 			"*** End of "PROJECT_NAME" configuration.\n"
-			"*** Execute 'make' to build, or try 'make help'."
+			"*** Execute 'make' to build the kernel or try 'make help'."
 			"\n\n"));
-	} else {
+		break;
+	default:
 		fprintf(stderr, _("\n\n"
 			"Your configuration changes were NOT saved."
 			"\n\n"));

kconfig/symbol.c

@@ -30,7 +30,6 @@ struct symbol symbol_yes = {
 	.flags = SYMBOL_VALID,
 };
 
-int sym_change_count;
 struct symbol *sym_defconfig_list;
 struct symbol *modules_sym;
 tristate modules_val;
@@ -379,7 +378,7 @@ void sym_clear_all_valid(void)
 
 	for_all_symbols(i, sym)
 		sym->flags &= ~SYMBOL_VALID;
-	sym_change_count++;
+	sym_add_change_count(1);
 	if (modules_sym)
 		sym_calc_value(modules_sym);
 }

kconfig/zconf.tab.c_shipped

@@ -2135,7 +2135,7 @@ void conf_parse(const char *name)
 		sym_check_deps(sym);
         }
 
-	sym_change_count = 1;
+	sym_set_change_count(1);
 }
 
 const char *zconf_tokenname(int token)