util/kconfig: Uprev to Linux 5.13's kconfig

This was originally several commits that had to be squashed into one
because the intermediate states weren't able to build coreboot:

 - one to remove everything that wasn't our own code, leaving only
   regex.[ch], toada.c, description.md and Makefile.inc.
 - one to copy in Linux 5.13's scripts/kconfig and adapt Makefile.inc
   to make the original Makefile work again.
 - adapt abuild to use olddefconfig, simplifying matters.
 - apply patches in util/kconfig/patches.
 - Some more adaptations to the libpayload build system.

The patches are now in util/kconfig/patches/, reverse applying them
should lead to a util/kconfig/ tree that contains exactly the Linux
version + our own 5 files.

Change-Id: Ia0e8fe4e9022b278f34ab113a433ef4d45e5c355
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37152
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

util/kconfig/patches/0001-Kconfig-Add-KCONFIG_STRICT-mode.patch

@@ -0,0 +1,43 @@
+From c822f47921feb53b97f48f3aa8d1e843f5099c63 Mon Sep 17 00:00:00 2001
+From: Stefan Reinauer <stefan.reinauer@coreboot.org>
+Date: Fri, 17 Jul 2015 17:26:48 -0700
+Subject: [PATCH] Kconfig: Add KCONFIG_STRICT mode
+
+This is basically a -Werror mode for Kconfig. When exporting
+KCONFIG_STRICT in the Makefile, warnings in Kconfig will produce
+errors instead.
+
+This will make it easier to spot unclean Kconfig files, settings
+and dependencies.
+
+Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
+---
+ util/kconfig/confdata.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -439,6 +439,7 @@ load:
+ 			if (def == S_DEF_USER) {
+ 				sym = sym_find(line + 2 + strlen(CONFIG_));
+ 				if (!sym) {
++					conf_warning("trying to assign non-existent symbol %s", line + strlen(CONFIG_));
+ 					conf_set_changed(true);
+ 					continue;
+ 				}
+@@ -521,6 +522,13 @@ load:
+ 	}
+ 	free(line);
+ 	fclose(in);
++
++	name = getenv("KCONFIG_STRICT");
++	if (name && *name && conf_warnings) {
++		fprintf(stderr, "\nERROR: %d warnings encountered, and warnings are errors.\n\n", conf_warnings);
++		return 1;
++	}
++
+ 	return 0;
+ }
+ 

util/kconfig/patches/0002-Kconfig-Change-symbol-override-from-warning-to-notic.patch

@@ -0,0 +1,69 @@
+From 20df4491aa88eb4a7f97090fbc4ff53f81926861 Mon Sep 17 00:00:00 2001
+From: Martin Roth <martinroth@google.com>
+Date: Wed, 21 Sep 2016 14:27:26 -0600
+Subject: [PATCH] Kconfig: Change symbol override from warning to notice
+
+Overriding symbols within a .config is pretty common when doing
+automated builds with various different options.  The warning
+text makes it sound like this is an issue, so change it to say
+'notice' instead.  We could get rid of it completely, but it's
+not a bad thing to know that we have two copies of the same symbol
+in the .config.
+
+BUG=chrome-os-partner:54059
+TEST=copy a disabled kconfig option to the end and set it to y.
+See notice text instead of warning.
+
+Signed-off-by: Martin Roth <martinroth@google.com>
+---
+ util/kconfig/confdata.c | 16 +++++++++++++---
+ 1 file changed, 13 insertions(+), 3 deletions(-)
+
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -184,6 +184,16 @@ static void conf_warning(const char *fmt
+ 	conf_warnings++;
+ }
+ 
++static void conf_notice(const char *fmt, ...)
++{
++	va_list ap;
++	va_start(ap, fmt);
++	fprintf(stderr, "%s:%d:notice: ", conf_filename, conf_lineno);
++	vfprintf(stderr, fmt, ap);
++	fprintf(stderr, "\n");
++	va_end(ap);
++}
++
+ static void conf_default_message_callback(const char *s)
+ {
+ 	printf("#\n# ");
+@@ -449,7 +459,7 @@ load:
+ 					sym->type = S_BOOLEAN;
+ 			}
+ 			if (sym->flags & def_flags) {
+-				conf_warning("override: reassigning to symbol %s", sym->name);
++				conf_notice("override: reassigning to symbol %s", sym->name);
+ 			}
+ 			switch (sym->type) {
+ 			case S_BOOLEAN:
+@@ -488,7 +498,7 @@ load:
+ 			}
+ 
+ 			if (sym->flags & def_flags) {
+-				conf_warning("override: reassigning to symbol %s", sym->name);
++				conf_notice("override: reassigning to symbol %s", sym->name);
+ 			}
+ 			if (conf_set_sym_val(sym, def, def_flags, p))
+ 				continue;
+@@ -513,7 +523,7 @@ load:
+ 				break;
+ 			case yes:
+ 				if (cs->def[def].tri != no)
+-					conf_warning("override: %s changes choice state", sym->name);
++					conf_notice("override: %s changes choice state", sym->name);
+ 				cs->def[def].val = sym;
+ 				break;
+ 			}

util/kconfig/patches/0003-util-kconfig-conf.c-Fix-newline-in-error-printf.patch

@@ -0,0 +1,25 @@
+From 887ae0ac3dc53fc73488a4dbc1fbf36fa620ce8b Mon Sep 17 00:00:00 2001
+From: Martin Roth <martinroth@google.com>
+Date: Tue, 6 Dec 2016 14:28:44 -0700
+Subject: [PATCH] util/kconfig/conf.c: Fix newline in error printf
+
+For some reason the \n in the defconfig save error was not escaped.
+
+Signed-off-by: Martin Roth <martinroth@google.com>
+---
+ util/kconfig/conf.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+Index: kconfig/conf.c
+===================================================================
+--- kconfig.orig/conf.c
++++ kconfig/conf.c
+@@ -900,7 +900,7 @@ int main(int ac, char **av)
+ 
+ 	if (input_mode == savedefconfig) {
+ 		if (conf_write_defconfig(defconfig_file)) {
+-			fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
++			fprintf(stderr, "\n*** Error while saving defconfig to: %s\n\n",
+ 				defconfig_file);
+ 			return 1;
+ 		}

util/kconfig/patches/0004-src-util-Use-NULL-instead-of-0-for-pointer.patch

@@ -0,0 +1,46 @@
+From e8287a030fc8fcec7404aa6731aef21a48035786 Mon Sep 17 00:00:00 2001
+From: Elyes HAOUAS <ehaouas@noos.fr>
+Date: Tue, 5 Jun 2018 08:41:29 +0200
+Subject: [PATCH] {src,util}: Use NULL instead of 0 for pointer
+
+Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
+---
+ util/kconfig/lxdialog/util.c | 2 +-
+ util/kconfig/qconf.h         | 8 ++++----
+ 2 files changed, 5 insertions(+), 5 deletions(-)
+
+Index: kconfig/lxdialog/util.c
+===================================================================
+--- kconfig.orig/lxdialog/util.c
++++ kconfig/lxdialog/util.c
+@@ -370,7 +370,7 @@ void print_autowrap(WINDOW * win, const
+ {
+ 	int newl, cur_x, cur_y;
+ 	int prompt_len, room, wlen;
+-	char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
++	char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = NULL;
+ 
+ 	strcpy(tempstr, prompt);
+ 
+Index: kconfig/qconf.h
+===================================================================
+--- kconfig.orig/qconf.h
++++ kconfig/qconf.h
+@@ -42,7 +42,7 @@ class ConfigList : public QTreeWidget {
+ 	Q_OBJECT
+ 	typedef class QTreeWidget Parent;
+ public:
+-	ConfigList(QWidget *parent, const char *name = 0);
++	ConfigList(QWidget *parent, const char *name = NULL);
+ 	~ConfigList();
+ 	void reinit(void);
+ 	ConfigItem* findConfigItem(struct menu *);
+@@ -188,7 +188,7 @@ class ConfigInfoView : public QTextBrows
+ 	typedef class QTextBrowser Parent;
+ 	QMenu *contextMenu;
+ public:
+-	ConfigInfoView(QWidget* parent, const char *name = 0);
++	ConfigInfoView(QWidget* parent, const char *name = NULL);
+ 	bool showDebug(void) const { return _showDebug; }
+ 
+ public slots:

util/kconfig/patches/0005-util-kconfig-Ignore-extra-symbols-in-configs-instead.patch

@@ -0,0 +1,37 @@
+From 2796443d5a2194400e56e6762e0f748ed0f0470c Mon Sep 17 00:00:00 2001
+From: Martin Roth <martinroth@google.com>
+Date: Wed, 10 Feb 2016 16:06:00 -0700
+Subject: [PATCH] util/kconfig: Ignore extra symbols in configs instead of
+ failing
+
+When updating an old .config file that has a symbol that has been
+removed from the current Kconfig tree, kconfig will generate a warning
+and fail to save the updated file.  This is incredibly annoying, and
+not the goal when trying to eliminate Kconfig warnings.
+
+Instead of generating a warning, just print a message that it's being
+ignored.  This will remove the offending symbol, while allowing the
+updated config file to be saved.
+
+Split the change from 1 line to 3 lines to keep it at 80 characters.
+
+Signed-off-by: Martin Roth <martinroth@google.com>
+---
+ util/kconfig/confdata.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -449,7 +449,9 @@ load:
+ 			if (def == S_DEF_USER) {
+ 				sym = sym_find(line + 2 + strlen(CONFIG_));
+ 				if (!sym) {
+-					conf_warning("trying to assign non-existent symbol %s", line + strlen(CONFIG_));
++					conf_message(
++						"ignoring nonexistent symbol %s",
++						line + 2 + strlen(CONFIG_));
+ 					conf_set_changed(true);
+ 					continue;
+ 				}

util/kconfig/patches/0006-util-kconfig-Set-parameter-of-mkdir-to-only-one-for-.patch

@@ -0,0 +1,28 @@
+From d470f1069744c3e6ef2e928217c1a4a23a87efa2 Mon Sep 17 00:00:00 2001
+From: zbao <fishbaozi@gmail.com>
+Date: Sat, 26 Sep 2015 06:20:53 -0400
+Subject: [PATCH] util/kconfig: Set parameter of mkdir to only one for mingw.
+
+The second parameter is to set file permissions for the directory, which
+is not needed in mingw.
+
+Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
+---
+ util/kconfig/confdata.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -164,6 +164,10 @@ struct conf_printer {
+ 	void (*print_comment)(FILE *, const char *, void *);
+ };
+ 
++#ifdef __MINGW32__
++#define mkdir(_n,_p) mkdir((_n))
++#endif
++
+ static void conf_warning(const char *fmt, ...)
+ 	__attribute__ ((format (printf, 1, 2)));
+ 

util/kconfig/patches/0007-kconfig-Allow-KCONFIG_STRICT-outside-of-confdata.c.patch

@@ -0,0 +1,189 @@
+From af6c23be63d14860c8c1f0d9fcbc020f7c11d84d Mon Sep 17 00:00:00 2001
+From: Stefan Reinauer <reinauer@chromium.org>
+Date: Thu, 20 Aug 2015 11:19:34 -0700
+Subject: [PATCH] kconfig: Allow KCONFIG_STRICT outside of confdata.c
+
+To catch dependency errors in symbol.c (such as the ones
+fixed by I51b4ee326f082c6a656a813ee5772e9c34f5c343) we need
+to check for global kconfig warnings before saving config
+files.
+
+This patch will produce errors for wrong dependencies and
+add catching of errors to conf, nconf and mconf. Sorry,
+gconf users, you will have to wait.
+
+Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
+---
+ util/kconfig/conf.c     | 10 ++++++++++
+ util/kconfig/confdata.c |  6 +-----
+ util/kconfig/lkc.h      |  3 +++
+ util/kconfig/mconf.c    | 10 ++++++++++
+ util/kconfig/nconf.c    | 13 +++++++++++++
+ util/kconfig/qconf.cc   |  2 ++
+ util/kconfig/symbol.c   |  1 +
+ 7 files changed, 40 insertions(+), 5 deletions(-)
+
+Index: kconfig/conf.c
+===================================================================
+--- kconfig.orig/conf.c
++++ kconfig/conf.c
+@@ -16,6 +16,8 @@
+ 
+ #include "lkc.h"
+ 
++int kconfig_warnings = 0;
++
+ static void conf(struct menu *menu);
+ static void check_conf(struct menu *menu);
+ 
+@@ -732,6 +734,7 @@ int main(int ac, char **av)
+ 	const char *progname = av[0];
+ 	int opt;
+ 	const char *name, *defconfig_file = NULL /* gcc uninit */;
++	char *env;
+ 	int no_conf_write = 0;
+ 
+ 	tty_stdio = isatty(0) && isatty(1);
+@@ -838,6 +841,13 @@ int main(int ac, char **av)
+ 		break;
+ 	}
+ 
++	env = getenv("KCONFIG_STRICT");
++	if (env && *env && kconfig_warnings) {
++		fprintf(stderr, "\n*** ERROR: %d warnings encountered, and "
++			"warnings are errors.\n\n", kconfig_warnings);
++		exit(1);
++	}
++
+ 	if (sync_kconfig) {
+ 		name = getenv("KCONFIG_NOSILENTUPDATE");
+ 		if (name && *name) {
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -539,11 +539,7 @@ load:
+ 	free(line);
+ 	fclose(in);
+ 
+-	name = getenv("KCONFIG_STRICT");
+-	if (name && *name && conf_warnings) {
+-		fprintf(stderr, "\nERROR: %d warnings encountered, and warnings are errors.\n\n", conf_warnings);
+-		return 1;
+-	}
++	kconfig_warnings += conf_warnings;
+ 
+ 	return 0;
+ }
+Index: kconfig/lkc.h
+===================================================================
+--- kconfig.orig/lkc.h
++++ kconfig/lkc.h
+@@ -39,6 +39,9 @@ void zconf_nextfile(const char *name);
+ int zconf_lineno(void);
+ const char *zconf_curname(void);
+ 
++/* conf.c */
++extern int kconfig_warnings;
++
+ /* confdata.c */
+ const char *conf_get_configname(void);
+ void set_all_choice_values(struct symbol *csym);
+Index: kconfig/mconf.c
+===================================================================
+--- kconfig.orig/mconf.c
++++ kconfig/mconf.c
+@@ -24,6 +24,8 @@
+ 
+ #define JUMP_NB			9
+ 
++int kconfig_warnings = 0;
++
+ static const char mconf_readme[] =
+ "Overview\n"
+ "--------\n"
+@@ -948,6 +950,7 @@ static void conf_save(void)
+ static int handle_exit(void)
+ {
+ 	int res;
++	char *env;
+ 
+ 	save_and_exit = 1;
+ 	reset_subtitle();
+@@ -962,6 +965,13 @@ static int handle_exit(void)
+ 
+ 	end_dialog(saved_x, saved_y);
+ 
++	env = getenv("KCONFIG_STRICT");
++	if (env && *env && kconfig_warnings) {
++		fprintf(stderr, "\n*** ERROR: %d warnings encountered, and "
++			"warnings are errors.\n\n", kconfig_warnings);
++		res = 2;
++	}
++
+ 	switch (res) {
+ 	case 0:
+ 		if (conf_write(filename)) {
+Index: kconfig/nconf.c
+===================================================================
+--- kconfig.orig/nconf.c
++++ kconfig/nconf.c
+@@ -15,6 +15,8 @@
+ #include "nconf.h"
+ #include <ctype.h>
+ 
++int kconfig_warnings = 0;
++
+ static const char nconf_global_help[] =
+ "Help windows\n"
+ "------------\n"
+@@ -645,6 +647,8 @@ static void set_config_filename(const ch
+ static int do_exit(void)
+ {
+ 	int res;
++	char *env;
++
+ 	if (!conf_get_changed()) {
+ 		global_exit = 1;
+ 		return 0;
+@@ -660,6 +664,15 @@ static int do_exit(void)
+ 		return -1;
+ 	}
+ 
++	env = getenv("KCONFIG_STRICT");
++	if (env && *env && kconfig_warnings) {
++		btn_dialog(main_window,
++			"\nWarnings encountered, and warnings are errors.\n\n",
++			1,
++			"<OK>");
++		res = 2;
++	}
++
+ 	/* if we got here, the user really wants to exit */
+ 	switch (res) {
+ 	case 0:
+Index: kconfig/qconf.cc
+===================================================================
+--- kconfig.orig/qconf.cc
++++ kconfig/qconf.cc
+@@ -26,6 +26,8 @@
+ #include "images.h"
+ 
+ 
++int kconfig_warnings = 0;
++
+ static QApplication *configApp;
+ static ConfigSettings *configSettings;
+ 
+Index: kconfig/symbol.c
+===================================================================
+--- kconfig.orig/symbol.c
++++ kconfig/symbol.c
+@@ -319,6 +319,7 @@ static void sym_warn_unmet_dep(struct sy
+ 			       "  Selected by [m]:\n");
+ 
+ 	fputs(str_get(&gs), stderr);
++	kconfig_warnings++;
+ }
+ 
+ void sym_calc_value(struct symbol *sym)

util/kconfig/patches/0008-kconfig-Add-wildcard-support-for-source.patch

@@ -0,0 +1,94 @@
+From 5e2355bf017b3347b29126a0eeb866558334f704 Mon Sep 17 00:00:00 2001
+From: Stefan Reinauer <stefan.reinauer@coreboot.org>
+Date: Fri, 3 Apr 2015 20:01:38 +0200
+Subject: [PATCH] kconfig: Add wildcard support for "source"
+
+Kconfig's include directive "source" does not support
+wildcards (e.g. source src/mainboard/*/Kconfig) which
+makes automatic inclusion of all boards a tedious task
+and prevents us from implementing "drop in" boards.
+
+In our Makefile.inc files we already include mainboard
+directories per wildcard, so let's add the infrastructure
+to do the same with Kconfig.
+
+v2: change from wordexp to glob for better portability.
+
+Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
+Signed-off-by: Patrick Georgi <pgeorgi@google.com>
+---
+ util/kconfig/lexer.l  | 27 +++++++++++++++++++++++++++
+ util/kconfig/lkc.h    |  1 +
+ util/kconfig/parser.y |  2 +-
+ 3 files changed, 29 insertions(+), 1 deletion(-)
+
+Index: kconfig/lexer.l
+===================================================================
+--- kconfig.orig/lexer.l
++++ kconfig/lexer.l
+@@ -8,6 +8,7 @@
+ %{
+ 
+ #include <assert.h>
++#include <glob.h>
+ #include <limits.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+@@ -438,6 +439,32 @@ void zconf_nextfile(const char *name)
+ 	current_file = file;
+ }
+ 
++void zconf_nextfiles(const char *wildcard)
++{
++	glob_t g;
++	char **w;
++	int i;
++
++	if (glob(wildcard, 0, NULL, &g) != 0) {
++		return;
++	}
++	if (g.gl_pathv == NULL) {
++		globfree(&g);
++		return;
++	}
++
++	/* working through files backwards, since
++	 * we're first pushing them on a stack
++	 * before actually handling them.
++	 */
++	for (i = g.gl_pathc; i > 0; i--) {
++		w = &g.gl_pathv[i - 1];
++		zconf_nextfile(*w);
++	}
++
++	globfree(&g);
++}
++
+ static void zconf_endfile(void)
+ {
+ 	struct buffer *parent;
+Index: kconfig/lkc.h
+===================================================================
+--- kconfig.orig/lkc.h
++++ kconfig/lkc.h
+@@ -36,6 +36,7 @@ void zconf_starthelp(void);
+ FILE *zconf_fopen(const char *name);
+ void zconf_initscan(const char *name);
+ void zconf_nextfile(const char *name);
++void zconf_nextfiles(const char *name);
+ int zconf_lineno(void);
+ const char *zconf_curname(void);
+ 
+Index: kconfig/parser.y
+===================================================================
+--- kconfig.orig/parser.y
++++ kconfig/parser.y
+@@ -358,7 +358,7 @@ menu_option_list:
+ source_stmt: T_SOURCE T_WORD_QUOTE T_EOL
+ {
+ 	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
+-	zconf_nextfile($2);
++	zconf_nextfiles($2);
+ 	free($2);
+ };
+ 

util/kconfig/patches/0009-util-kconfig-Allow-emitting-false-booleans-into-kconfig-output.patch

@@ -0,0 +1,93 @@
+commit ab0cc6067d5a00182e89fbec82b942eb3d803204
+Author: Patrick Georgi <pgeorgi@google.com>
+Date:   Fri Nov 22 22:08:15 2019 +0100
+
+    util/kconfig: Allow emitting false booleans into kconfig output
+
+    This is controlled by an environment variable so the same tool is
+    useful in different contexts.
+
+    Change-Id: I9e62b05e45709f1539e455e2eed37308609be15e
+    Signed-off-by: Patrick Georgi <pgeorgi@google.com>
+
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -687,6 +687,9 @@ header_print_symbol(FILE *fp, struct sym
+ 
+ 		switch (*value) {
+ 		case 'n':
++			if (getenv("KCONFIG_NEGATIVES") != NULL)
++				fprintf(fp, "#define %s%s%s 0\n",
++				    CONFIG_, sym->name, suffix);
+ 			break;
+ 		case 'm':
+ 			suffix = "_MODULE";
+@@ -702,14 +705,28 @@ header_print_symbol(FILE *fp, struct sym
+ 
+ 		if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
+ 			prefix = "0x";
++		if (value[0] == '\0') {
++			/*
++			 * prefix is reset to remain closer to the older
++			 * coreboot patch. No need to keep this once kconfig
++			 * is fully upreved
++			 */
++			prefix = "";
++			value = "0";
++		}
+ 		fprintf(fp, "#define %s%s %s%s\n",
+ 		    CONFIG_, sym->name, prefix, value);
+ 		break;
+ 	}
+ 	case S_STRING:
++		if (value[0] == '\0')
++			break;
++		if (!(sym->flags & SYMBOL_WRITE))
++			break;
++		/* fall through */
+ 	case S_INT:
+ 		fprintf(fp, "#define %s%s %s\n",
+-		    CONFIG_, sym->name, value);
++		    CONFIG_, sym->name, value[0]?value:"0");
+ 		break;
+ 	default:
+ 		break;
+@@ -1080,6 +1097,7 @@ int conf_write_autoconf(int overwrite)
+ 	const char *autoconf_name = conf_get_autoconfig_name();
+ 	FILE *out, *out_h;
+ 	int i;
++	int print_negatives = getenv("KCONFIG_NEGATIVES") != NULL;
+ 
+ 	if (!overwrite && is_present(autoconf_name))
+ 		return 0;
+@@ -1104,11 +1122,13 @@ int conf_write_autoconf(int overwrite)
+ 
+ 	for_all_symbols(i, sym) {
+ 		sym_calc_value(sym);
+-		if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
++		if (!(sym->flags & SYMBOL_WRITE) && !print_negatives)
++			continue;
++		if (!sym->name)
+ 			continue;
+ 
+ 		/* write symbols to auto.conf and autoconf.h */
+-		conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
++		conf_write_symbol(out, sym, &kconfig_printer_cb, print_negatives?NULL:(void *)1);
+ 		conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
+ 	}
+ 	fclose(out);
+Index: kconfig/symbol.c
+===================================================================
+--- kconfig.orig/symbol.c
++++ kconfig/symbol.c
+@@ -757,7 +757,7 @@ const char *sym_get_string_default(struc
+ 		}
+ 	case S_INT:
+ 	case S_HEX:
+-		return str;
++		return "0";
+ 	case S_STRING:
+ 		return str;
+ 	case S_UNKNOWN:

util/kconfig/patches/0010-reenable-source-in-choice.patch

@@ -0,0 +1,16 @@
+Kconfig 5.8 (since commit 09d5873e4d1f70202314b5fe40160f9b14b9d2d0)
+blocks using the source statement within choice but that's a pattern we
+use intensively. Re-enable it.
+
+Index: kconfig/parser.y
+===================================================================
+--- kconfig.orig/parser.y
++++ kconfig/parser.y
+@@ -134,6 +134,7 @@ stmt_list_in_choice:
+ 	| stmt_list_in_choice comment_stmt
+ 	| stmt_list_in_choice config_stmt
+ 	| stmt_list_in_choice if_stmt_in_choice
++	| stmt_list_in_choice source_stmt
+ 	| stmt_list_in_choice error T_EOL	{ zconf_error("invalid statement"); }
+ ;
+ 

util/kconfig/patches/0011-remove-include-config-hardcodes.patch

@@ -0,0 +1,39 @@
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -241,6 +241,13 @@ static const char *conf_get_autoconfig_n
+ 	return name ? name : "include/config/auto.conf";
+ }
+ 
++static const char *conf_get_autobase_name(void)
++{
++	char *name = getenv("KCONFIG_SPLITCONFIG");
++
++	return name ? name : "include/config/";
++}
++
+ static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
+ {
+ 	char *p2;
+@@ -1024,7 +1031,7 @@ static int conf_touch_deps(void)
+ 	struct symbol *sym;
+ 	int res, i;
+ 
+-	strcpy(depfile_path, "include/config/");
++	strcpy(depfile_path, conf_get_autobase_name());
+ 	depfile_prefix_len = strlen(depfile_path);
+ 
+ 	name = conf_get_autoconfig_name();
+@@ -1102,7 +1109,10 @@ int conf_write_autoconf(int overwrite)
+ 	if (!overwrite && is_present(autoconf_name))
+ 		return 0;
+ 
+-	conf_write_dep("include/config/auto.conf.cmd");
++	char autoconfcmd_path[PATH_MAX];
++	snprintf(autoconfcmd_path, sizeof(autoconfcmd_path), "%s%s",
++		conf_get_autobase_name(), "auto.conf.cmd");
++	conf_write_dep(autoconfcmd_path);
+ 
+ 	if (conf_touch_deps())
+ 		return 1;

util/kconfig/patches/0012-safer-tmpfiles.patch

@@ -0,0 +1,124 @@
+commit 7b2deddbb0ef350e189fe42c025b07c943aedc4c
+Author: Raul E Rangel <rrangel@chromium.org>
+Date:   Thu Jul 25 15:49:52 2019 -0600
+
+    Kconfig: Write tmp files into same directory as target files
+
+    This removes the need for COREBOOT_BUILD_DIR in Kconfig. Since the
+    original files will be replaced with the tmp file, the parent directory
+    already needs to be writable.
+
+    Before this change, the tmp files would be created in the CWD (src) if
+    COREBOOT_BUILD_DIR was not specified.
+
+    BUG=b:112267918
+    TEST=emerge-grunt coreboot and verified no tmp files were created in the
+    src directory.
+
+    Change-Id: Icdaf2ff3dd1ec98813b75ef55b96e38e1ca19ec7
+    Signed-off-by: Raul E Rangel <rrangel@chromium.org>
+    Reviewed-on: https://review.coreboot.org/c/coreboot/+/34244
+    Reviewed-by: Martin Roth <martinroth@google.com>
+    Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
+
+Index: kconfig/confdata.c
+===================================================================
+--- kconfig.orig/confdata.c
++++ kconfig/confdata.c
+@@ -880,6 +880,16 @@ next_menu:
+ 	return 0;
+ }
+ 
++
++static int conf_mktemp(const char *path, char *tmpfile)
++{
++	if (snprintf(tmpfile, PATH_MAX, "%s.tmp.XXXXXX", path) >= PATH_MAX) {
++		errno = EOVERFLOW;
++		return -1;
++	}
++	return mkstemp(tmpfile);
++}
++
+ int conf_write(const char *name)
+ {
+ 	FILE *out;
+@@ -1001,7 +1011,14 @@ static int conf_write_dep(const char *na
+ 	struct file *file;
+ 	FILE *out;
+ 
+-	out = fopen("..config.tmp", "w");
++	if (make_parent_dir(name))
++		return 1;
++	char filename[PATH_MAX];
++	int fd = conf_mktemp(name, filename);
++	if (fd == -1)
++		return 1;
++
++	out = fdopen(fd, "w");
+ 	if (!out)
+ 		return 1;
+ 	fprintf(out, "deps_config := \\\n");
+@@ -1019,9 +1036,7 @@ static int conf_write_dep(const char *na
+ 	fprintf(out, "\n$(deps_config): ;\n");
+ 	fclose(out);
+ 
+-	if (make_parent_dir(name))
+-		return 1;
+-	rename("..config.tmp", name);
++	rename(filename, name);
+ 	return 0;
+ }
+ 
+@@ -1117,11 +1132,26 @@ int conf_write_autoconf(int overwrite)
+ 	if (conf_touch_deps())
+ 		return 1;
+ 
+-	out = fopen(".tmpconfig", "w");
++	if (make_parent_dir(autoconf_name))
++		return 1;
++	char filename[PATH_MAX];
++	int fd = conf_mktemp(autoconf_name, filename);
++	if (fd == -1)
++		return 1;
++	out = fdopen(fd, "w");
+ 	if (!out)
+ 		return 1;
+ 
+-	out_h = fopen(".tmpconfig.h", "w");
++	name = getenv("KCONFIG_AUTOHEADER");
++	if (!name)
++		name = "include/generated/autoconf.h";
++	if (make_parent_dir(name))
++		return 1;
++	char filename_h[PATH_MAX];
++	int fd_h = conf_mktemp(name, filename_h);
++	if (fd_h == -1)
++		return 1;
++	out_h = fdopen(fd_h, "w");
+ 	if (!out_h) {
+ 		fclose(out);
+ 		return 1;
+@@ -1144,21 +1174,14 @@ int conf_write_autoconf(int overwrite)
+ 	fclose(out);
+ 	fclose(out_h);
+ 
+-	name = getenv("KCONFIG_AUTOHEADER");
+-	if (!name)
+-		name = "include/generated/autoconf.h";
+-	if (make_parent_dir(name))
+-		return 1;
+-	if (rename(".tmpconfig.h", name))
++	if (rename(filename_h, name))
+ 		return 1;
+ 
+-	if (make_parent_dir(autoconf_name))
+-		return 1;
+ 	/*
+ 	 * This must be the last step, kbuild has a dependency on auto.conf
+ 	 * and this marks the successful completion of the previous steps.
+ 	 */
+-	if (rename(".tmpconfig", autoconf_name))
++	if (rename(filename, autoconf_name))
+ 		return 1;
+ 
+ 	return 0;

util/kconfig/patches/series

@@ -0,0 +1,12 @@
+0001-Kconfig-Add-KCONFIG_STRICT-mode.patch
+0002-Kconfig-Change-symbol-override-from-warning-to-notic.patch
+0003-util-kconfig-conf.c-Fix-newline-in-error-printf.patch
+0004-src-util-Use-NULL-instead-of-0-for-pointer.patch
+0005-util-kconfig-Ignore-extra-symbols-in-configs-instead.patch
+0006-util-kconfig-Set-parameter-of-mkdir-to-only-one-for-.patch
+0007-kconfig-Allow-KCONFIG_STRICT-outside-of-confdata.c.patch
+0008-kconfig-Add-wildcard-support-for-source.patch
+0009-util-kconfig-Allow-emitting-false-booleans-into-kconfig-output.patch
+0010-reenable-source-in-choice.patch
+0011-remove-include-config-hardcodes.patch
+0012-safer-tmpfiles.patch