kconfig: write Kconfig files to autoconf.cmd in order

Currently, include/config/autoconf.cmd saves included Kconfig files in
reverse order. While this is not a big deal, it is inconsistent with
other *.cmd files generated by fixdep.

Output the included Kconfig files in the included order.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/confdata.c

@@ -20,6 +20,8 @@
 
 #include "lkc.h"
 
+struct gstr autoconf_cmd;
+
 /* return true if 'path' exists, false otherwise */
 static bool is_present(const char *path)
 {
@@ -972,7 +974,6 @@ int conf_write(const char *name)
 static int conf_write_autoconf_cmd(const char *autoconf_name)
 {
 	char name[PATH_MAX], tmp[PATH_MAX];
-	struct file *file;
 	FILE *out;
 	int ret;
 
@@ -993,9 +994,7 @@ static int conf_write_autoconf_cmd(const char *autoconf_name)
 		return -1;
 	}
 
-	fprintf(out, "deps_config := \\\n");
-	for (file = file_list; file; file = file->next)
-		fprintf(out, "\t%s \\\n", file->name);
+	fputs(str_get(&autoconf_cmd), out);
 
 	fprintf(out, "\n%s: $(deps_config)\n\n", autoconf_name);
 

scripts/kconfig/lkc.h

@@ -40,6 +40,7 @@ int zconf_lineno(void);
 const char *zconf_curname(void);
 
 /* confdata.c */
+extern struct gstr autoconf_cmd;
 const char *conf_get_configname(void);
 void set_all_choice_values(struct symbol *csym);
 

scripts/kconfig/parser.y

@@ -480,6 +480,10 @@ void conf_parse(const char *name)
 	struct symbol *sym;
 	int i;
 
+	autoconf_cmd = str_new();
+
+	str_printf(&autoconf_cmd, "deps_config := \\\n");
+
 	zconf_initscan(name);
 
 	_menu_init();

scripts/kconfig/util.c

@@ -25,6 +25,9 @@ struct file *file_lookup(const char *name)
 	file->name = xstrdup(name);
 	file->next = file_list;
 	file_list = file;
+
+	str_printf(&autoconf_cmd, "\t%s \\\n", name);
+
 	return file;
 }