kconfig: Sync with upstream v5.1

This commit introduces the following upstream changes:

9c38f1f04408 kconfig/[mn]conf: handle backspace (^H) key
c71bb9f86666 kconfig: remove stale lxdialog/.gitignore
8741908b3e29 kconfig: fix 'Save As' menu of xconfig
058507195b53 kbuild: move ".config not found!" message from Kconfig to Makefile
769a1c022678 kconfig: rename zconf.y to parser.y
981e545a698a kconfig: rename zconf.l to lexer.l

Signed-off-by: Chris Packham <judge.packham@gmail.com>

kconfig/Makefile.am

@@ -5,26 +5,26 @@ transform		= s,x,x,
 
 pkglibexec_PROGRAMS    = conf nconf mconf
 
-EXTRA_DIST		= zconf.y zconf.l \
+EXTRA_DIST		= parser.y lexer.l \
 				  expr.h list.h lkc.h lkc_proto.h nconf.h lxdialog/dialog.h \
 				  confdata.c expr.c kconf_id.c menu.c symbol.c util.c
 
-CLEANFILES		= zconf.lex.c zconf.tab.c
-BUILT_SOURCES		= zconf.lex.c zconf.tab.c
+CLEANFILES		= lexer.lex.c parser.tab.c parser.tab.h
+BUILT_SOURCES		= lexer.lex.c parser.tab.c
 
 AM_LFLAGS		= -L
 AM_YFLAGS		= -t -l
 AM_CPPFLAGS		= -include config.h -DCONFIG_=\"CT_\"
 AM_LIBTOOLFLAGS	= --tag CC
 
-conf_SOURCES    = conf.c confdata.c expr.c symbol.c preprocess.c zconf.lex.c zconf.tab.c
+conf_SOURCES    = conf.c confdata.c expr.c symbol.c preprocess.c lexer.lex.c parser.tab.c
 conf_LDADD      = $(LIBINTL)
 
-nconf_SOURCES	= nconf.c nconf.gui.c confdata.c expr.c symbol.c preprocess.c zconf.lex.c zconf.tab.c
+nconf_SOURCES	= nconf.c nconf.gui.c confdata.c expr.c symbol.c preprocess.c lexer.lex.c parser.tab.c
 nconf_CFLAGS	= $(CURSES_CFLAGS)
 nconf_LDADD     = $(MENU_LIBS) $(PANEL_LIBS) $(CURSES_LIBS) $(LIBINTL)
 
-mconf_SOURCES	= mconf.c confdata.c expr.c symbol.c preprocess.c zconf.lex.c zconf.tab.c \
+mconf_SOURCES	= mconf.c confdata.c expr.c symbol.c preprocess.c lexer.lex.c parser.tab.c \
 				  lxdialog/checklist.c lxdialog/inputbox.c \
 				  lxdialog/menubox.c lxdialog/textbox.c lxdialog/util.c \
 				  lxdialog/yesno.c
@@ -43,8 +43,8 @@ AM_V_LEX		= $(am__v_LEX_@AM_V@)
 am__v_LEX_		= $(am__v_LEX_@AM_DEFAULT_V@)
 am__v_LEX_0		= @echo "  LEX     " $@;
 
-zconf.tab.c: zconf.y
-	$(AM_V_YACC)$(YACCCOMPILE) -o$@ --defines=zconf.tab.h $<
+parser.tab.c: parser.y
+	$(AM_V_YACC)$(YACCCOMPILE) -o$@ --defines=parser.tab.h $<
 
-zconf.lex.c: zconf.l
+lexer.lex.c: lexer.l
 	$(AM_V_LEX)$(LEXCOMPILE) -o$@ $<

kconfig/conf.c

@@ -468,7 +468,6 @@ int main(int ac, char **av)
 	const char *progname = av[0];
 	int opt;
 	const char *name, *defconfig_file = NULL /* gcc uninit */;
-	struct stat tmpstat;
 	int no_conf_write = 0;
 
 	tty_stdio = isatty(0) && isatty(1);
@@ -540,18 +539,6 @@ int main(int ac, char **av)
 	name = av[optind];
 	conf_parse(name);
 	//zconfdump(stdout);
-	if (sync_kconfig) {
-		name = conf_get_configname();
-		if (stat(name, &tmpstat)) {
-			fprintf(stderr, "***\n"
-				"*** Configuration file \"%s\" not found!\n"
-				"***\n"
-				"*** Please configure with \"menuconfig\", or use a\n"
-				"*** pre-existing sample (see list with \"list-samples\").\n"
-				"***\n", name);
-			exit(1);
-		}
-	}
 
 	switch (input_mode) {
 	case defconfig:

kconfig/expr.h

@@ -172,7 +172,7 @@ struct symbol {
  *         int "BAZ Value"
  *         range 1..255
  *
- * Please, also check zconf.y:print_symbol() when modifying the
+ * Please, also check parser.y:print_symbol() when modifying the
  * list of property types!
  */
 enum prop_type {

kconfig/lexer.l

@@ -15,7 +15,7 @@
 #include <unistd.h>
 
 #include "lkc.h"
-#include "zconf.tab.h"
+#include "parser.tab.h"
 
 #define YY_DECL		static int yylex1(void)
 

kconfig/lkc.h

@@ -90,7 +90,7 @@ void *xrealloc(void *p, size_t size);
 char *xstrdup(const char *s);
 char *xstrndup(const char *s, size_t n);
 
-/* zconf.l */
+/* lexer.l */
 int yylex(void);
 
 struct gstr {

kconfig/lxdialog/inputbox.c

@@ -113,7 +113,8 @@ do_resize:
 			case KEY_DOWN:
 				break;
 			case KEY_BACKSPACE:
-			case 127:
+			case 8:   /* ^H */
+			case 127: /* ^? */
 				if (pos) {
 					wattrset(dialog, dlg.inputbox.atr);
 					if (input_x == 0) {

kconfig/nconf.c

@@ -1051,7 +1051,7 @@ static int do_match(int key, struct match_state *state, int *ans)
 		state->match_direction = FIND_NEXT_MATCH_UP;
 		*ans = get_mext_match(state->pattern,
 				state->match_direction);
-	} else if (key == KEY_BACKSPACE || key == 127) {
+	} else if (key == KEY_BACKSPACE || key == 8 || key == 127) {
 		state->pattern[strlen(state->pattern)-1] = '\0';
 		adj_match_dir(&state->match_direction);
 	} else

kconfig/nconf.gui.c

@@ -439,7 +439,8 @@ int dialog_inputbox(WINDOW *main_window,
 		case KEY_F(F_EXIT):
 		case KEY_F(F_BACK):
 			break;
-		case 127:
+		case 8:   /* ^H */
+		case 127: /* ^? */
 		case KEY_BACKSPACE:
 			if (cursor_position > 0) {
 				memmove(&result[cursor_position-1],