diff mbox

[1/4] kconf: sync with upstream version 37861ffa8c28

Message ID 20171116143855.12307-1-nbd@nbd.name (mailing list archive)
State Accepted
Headers show

Commit Message

Felix Fietkau Nov. 16, 2017, 2:38 p.m. UTC
Adds support for the imply keyword

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 backport/kconf/conf.c       |    7 +-
 backport/kconf/confdata.c   |   19 +-
 backport/kconf/expr.c       |    2 +-
 backport/kconf/expr.h       |    2 +
 backport/kconf/menu.c       |   57 +-
 backport/kconf/symbol.c     |   43 +-
 backport/kconf/zconf.hash.c |   68 +-
 backport/kconf/zconf.lex.c  |  325 +++++----
 backport/kconf/zconf.tab.c  | 1581 ++++++++++++++++++++-----------------------
 9 files changed, 1032 insertions(+), 1072 deletions(-)

Comments

Johannes Berg Nov. 17, 2017, 9:47 a.m. UTC | #1
All applied, thanks!
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diff mbox

Patch

diff --git a/backport/kconf/conf.c b/backport/kconf/conf.c
index 6c204318..866369f1 100644
--- a/backport/kconf/conf.c
+++ b/backport/kconf/conf.c
@@ -5,6 +5,7 @@ 
 
 #include <locale.h>
 #include <ctype.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -41,7 +42,7 @@  static int tty_stdio;
 static int valid_stdin = 1;
 static int sync_kconfig;
 static int conf_cnt;
-static char line[128];
+static char line[PATH_MAX];
 static struct menu *rootEntry;
 
 static void print_help(struct menu *menu)
@@ -109,7 +110,7 @@  static int conf_askvalue(struct symbol *sym, const char *def)
 		/* fall through */
 	case oldaskconfig:
 		fflush(stdout);
-		xfgets(line, 128, stdin);
+		xfgets(line, sizeof(line), stdin);
 		if (!tty_stdio)
 			printf("\n");
 		return 1;
@@ -311,7 +312,7 @@  static int conf_choice(struct menu *menu)
 			/* fall through */
 		case oldaskconfig:
 			fflush(stdout);
-			xfgets(line, 128, stdin);
+			xfgets(line, sizeof(line), stdin);
 			strip(line);
 			if (line[0] == '?') {
 				print_help(menu);
diff --git a/backport/kconf/confdata.c b/backport/kconf/confdata.c
index c814f576..297b079a 100644
--- a/backport/kconf/confdata.c
+++ b/backport/kconf/confdata.c
@@ -267,11 +267,8 @@  int conf_read_simple(const char *name, int def)
 		if (in)
 			goto load;
 		sym_add_change_count(1);
-		if (!sym_defconfig_list) {
-			if (modules_sym)
-				sym_calc_value(modules_sym);
+		if (!sym_defconfig_list)
 			return 1;
-		}
 
 		for_all_defaults(sym_defconfig_list, prop) {
 			if (expr_calc_value(prop->visible.expr) == no ||
@@ -378,7 +375,9 @@  load:
 				continue;
 		} else {
 			if (line[0] != '\r' && line[0] != '\n')
-				conf_warning("unexpected data");
+				conf_warning("unexpected data: %.*s",
+					     (int)strcspn(line, "\r\n"), line);
+
 			continue;
 		}
 setsym:
@@ -404,9 +403,6 @@  setsym:
 	}
 	free(line);
 	fclose(in);
-
-	if (modules_sym)
-		sym_calc_value(modules_sym);
 	return 0;
 }
 
@@ -417,8 +413,12 @@  int conf_read(const char *name)
 
 	sym_set_change_count(0);
 
-	if (conf_read_simple(name, S_DEF_USER))
+	if (conf_read_simple(name, S_DEF_USER)) {
+		sym_calc_value(modules_sym);
 		return 1;
+	}
+
+	sym_calc_value(modules_sym);
 
 	for_all_symbols(i, sym) {
 		sym_calc_value(sym);
@@ -849,6 +849,7 @@  static int conf_split_config(void)
 
 	name = conf_get_autoconfig_name();
 	conf_read_simple(name, S_DEF_AUTO);
+	sym_calc_value(modules_sym);
 
 	if (chdir("include/config"))
 		return 1;
diff --git a/backport/kconf/expr.c b/backport/kconf/expr.c
index 667d1aa2..cbf4996d 100644
--- a/backport/kconf/expr.c
+++ b/backport/kconf/expr.c
@@ -1113,7 +1113,7 @@  void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *
 			fn(data, e->left.sym, e->left.sym->name);
 		else
 			fn(data, NULL, "<choice>");
-		fn(data, NULL, e->type == E_LEQ ? ">=" : ">");
+		fn(data, NULL, e->type == E_GEQ ? ">=" : ">");
 		fn(data, e->right.sym, e->right.sym->name);
 		break;
 	case E_UNEQUAL:
diff --git a/backport/kconf/expr.h b/backport/kconf/expr.h
index 973b6f73..a73f762c 100644
--- a/backport/kconf/expr.h
+++ b/backport/kconf/expr.h
@@ -85,6 +85,7 @@  struct symbol {
 	struct property *prop;
 	struct expr_value dir_dep;
 	struct expr_value rev_dep;
+	struct expr_value implied;
 };
 
 #define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next) if (sym->type != S_OTHER)
@@ -136,6 +137,7 @@  enum prop_type {
 	P_DEFAULT,  /* default y */
 	P_CHOICE,   /* choice value */
 	P_SELECT,   /* select BAR */
+	P_IMPLY,    /* imply BAR */
 	P_RANGE,    /* range 7..100 (for a symbol) */
 	P_ENV,      /* value from environment variable */
 	P_SYMBOL,   /* where a symbol is defined */
diff --git a/backport/kconf/menu.c b/backport/kconf/menu.c
index b05cc3d4..e9357931 100644
--- a/backport/kconf/menu.c
+++ b/backport/kconf/menu.c
@@ -233,6 +233,8 @@  static void sym_check_prop(struct symbol *sym)
 {
 	struct property *prop;
 	struct symbol *sym2;
+	char *use;
+
 	for (prop = sym->prop; prop; prop = prop->next) {
 		switch (prop->type) {
 		case P_DEFAULT:
@@ -252,18 +254,20 @@  static void sym_check_prop(struct symbol *sym)
 			}
 			break;
 		case P_SELECT:
+		case P_IMPLY:
+			use = prop->type == P_SELECT ? "select" : "imply";
 			sym2 = prop_get_symbol(prop);
 			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 				prop_warn(prop,
-				    "config symbol '%s' uses select, but is "
-				    "not boolean or tristate", sym->name);
+				    "config symbol '%s' uses %s, but is "
+				    "not boolean or tristate", sym->name, use);
 			else if (sym2->type != S_UNKNOWN &&
 				 sym2->type != S_BOOLEAN &&
 				 sym2->type != S_TRISTATE)
 				prop_warn(prop,
-				    "'%s' has wrong type. 'select' only "
+				    "'%s' has wrong type. '%s' only "
 				    "accept arguments of boolean and "
-				    "tristate type", sym2->name);
+				    "tristate type", sym2->name, use);
 			break;
 		case P_RANGE:
 			if (sym->type != S_INT && sym->type != S_HEX)
@@ -333,6 +337,10 @@  void menu_finalize(struct menu *parent)
 					struct symbol *es = prop_get_symbol(prop);
 					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
+				} else if (prop->type == P_IMPLY) {
+					struct symbol *es = prop_get_symbol(prop);
+					es->implied.expr = expr_alloc_or(es->implied.expr,
+							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 				}
 			}
 		}
@@ -477,7 +485,7 @@  bool menu_is_visible(struct menu *menu)
 
 	if (menu->visibility) {
 		if (expr_calc_value(menu->visibility) == no)
-			return no;
+			return false;
 	}
 
 	sym = menu->sym;
@@ -612,13 +620,30 @@  static struct property *get_symbol_prop(struct symbol *sym)
 	return prop;
 }
 
+static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
+				 enum prop_type tok, const char *prefix)
+{
+	bool hit = false;
+	struct property *prop;
+
+	for_all_properties(sym, prop, tok) {
+		if (!hit) {
+			str_append(r, prefix);
+			hit = true;
+		} else
+			str_printf(r, " && ");
+		expr_gstr_print(prop->expr, r);
+	}
+	if (hit)
+		str_append(r, "\n");
+}
+
 /*
  * head is optional and may be NULL
  */
 static void get_symbol_str(struct gstr *r, struct symbol *sym,
 		    struct list_head *head)
 {
-	bool hit;
 	struct property *prop;
 
 	if (sym && sym->name) {
@@ -648,22 +673,20 @@  static void get_symbol_str(struct gstr *r, struct symbol *sym,
 		}
 	}
 
-	hit = false;
-	for_all_properties(sym, prop, P_SELECT) {
-		if (!hit) {
-			str_append(r, "  Selects: ");
-			hit = true;
-		} else
-			str_printf(r, " && ");
-		expr_gstr_print(prop->expr, r);
-	}
-	if (hit)
-		str_append(r, "\n");
+	get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
 	if (sym->rev_dep.expr) {
 		str_append(r, _("  Selected by: "));
 		expr_gstr_print(sym->rev_dep.expr, r);
 		str_append(r, "\n");
 	}
+
+	get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
+	if (sym->implied.expr) {
+		str_append(r, _("  Implied by: "));
+		expr_gstr_print(sym->implied.expr, r);
+		str_append(r, "\n");
+	}
+
 	str_append(r, "\n\n");
 }
 
diff --git a/backport/kconf/symbol.c b/backport/kconf/symbol.c
index 70c5ee18..20136ffe 100644
--- a/backport/kconf/symbol.c
+++ b/backport/kconf/symbol.c
@@ -209,12 +209,26 @@  static void sym_set_all_changed(void)
 static void sym_calc_visibility(struct symbol *sym)
 {
 	struct property *prop;
+	struct symbol *choice_sym = NULL;
 	tristate tri;
 
 	/* any prompt visible? */
 	tri = no;
+
+	if (sym_is_choice_value(sym))
+		choice_sym = prop_get_symbol(sym_get_choice_prop(sym));
+
 	for_all_prompts(sym, prop) {
 		prop->visible.tri = expr_calc_value(prop->visible.expr);
+		/*
+		 * Tristate choice_values with visibility 'mod' are
+		 * not visible if the corresponding choice's value is
+		 * 'yes'.
+		 */
+		if (choice_sym && sym->type == S_TRISTATE &&
+		    prop->visible.tri == mod && choice_sym->curr.tri == yes)
+			prop->visible.tri = no;
+
 		tri = EXPR_OR(tri, prop->visible.tri);
 	}
 	if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
@@ -244,6 +258,15 @@  static void sym_calc_visibility(struct symbol *sym)
 		sym->rev_dep.tri = tri;
 		sym_set_changed(sym);
 	}
+	tri = no;
+	if (sym->implied.expr && sym->dir_dep.tri != no)
+		tri = expr_calc_value(sym->implied.expr);
+	if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
+		tri = yes;
+	if (sym->implied.tri != tri) {
+		sym->implied.tri = tri;
+		sym_set_changed(sym);
+	}
 }
 
 /*
@@ -383,6 +406,10 @@  void sym_calc_value(struct symbol *sym)
 					newval.tri = EXPR_AND(expr_calc_value(prop->expr),
 							      prop->visible.tri);
 				}
+				if (sym->implied.tri != no) {
+					sym->flags |= SYMBOL_WRITE;
+					newval.tri = EXPR_OR(newval.tri, sym->implied.tri);
+				}
 			}
 		calc_newval:
 			if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
@@ -399,7 +426,8 @@  void sym_calc_value(struct symbol *sym)
 			}
 			newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
 		}
-		if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
+		if (newval.tri == mod &&
+		    (sym_get_type(sym) == S_BOOLEAN || sym->implied.tri == yes))
 			newval.tri = yes;
 		break;
 	case S_STRING:
@@ -467,8 +495,7 @@  void sym_clear_all_valid(void)
 	for_all_symbols(i, sym)
 		sym->flags &= ~SYMBOL_VALID;
 	sym_add_change_count(1);
-	if (modules_sym)
-		sym_calc_value(modules_sym);
+	sym_calc_value(modules_sym);
 }
 
 bool sym_tristate_within_range(struct symbol *sym, tristate val)
@@ -485,6 +512,8 @@  bool sym_tristate_within_range(struct symbol *sym, tristate val)
 		return false;
 	if (sym->visible <= sym->rev_dep.tri)
 		return false;
+	if (sym->implied.tri == yes && val == mod)
+		return false;
 	if (sym_is_choice_value(sym) && sym->visible == yes)
 		return val == yes;
 	return val >= sym->rev_dep.tri && val <= sym->visible;
@@ -737,6 +766,10 @@  const char *sym_get_string_default(struct symbol *sym)
 	if (sym->type == S_BOOLEAN && val == mod)
 		val = yes;
 
+	/* adjust the default value if this symbol is implied by another */
+	if (val < sym->implied.tri)
+		val = sym->implied.tri;
+
 	switch (sym->type) {
 	case S_BOOLEAN:
 	case S_TRISTATE:
@@ -1117,6 +1150,8 @@  static void sym_check_print_recursive(struct symbol *last_sym)
 		if (stack->sym == last_sym)
 			fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
 				prop->file->name, prop->lineno);
+			fprintf(stderr, "For a resolution refer to Documentation/kbuild/kconfig-language.txt\n");
+			fprintf(stderr, "subsection \"Kconfig recursive dependency limitations\"\n");
 		if (stack->expr) {
 			fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
 				prop->file->name, prop->lineno,
@@ -1337,6 +1372,8 @@  const char *prop_get_type_name(enum prop_type type)
 		return "choice";
 	case P_SELECT:
 		return "select";
+	case P_IMPLY:
+		return "imply";
 	case P_RANGE:
 		return "range";
 	case P_SYMBOL:
diff --git a/backport/kconf/zconf.hash.c b/backport/kconf/zconf.hash.c
index c77a8eff..d51b15de 100644
--- a/backport/kconf/zconf.hash.c
+++ b/backport/kconf/zconf.hash.c
@@ -50,15 +50,15 @@  kconf_id_hash (register const char *str, register unsigned int len)
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+      73, 73, 73, 73, 73,  0, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
-      73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
-      73, 73, 73, 73, 73, 73, 73,  5, 25, 25,
+      73, 73, 73, 73, 73, 73, 73, 10, 25, 25,
        0,  0,  0,  5,  0,  0, 73, 73,  5,  0,
       10,  5, 45, 73, 20, 20,  0, 15, 15, 73,
-      20,  5, 73, 73, 73, 73, 73, 73, 73, 73,
+      20,  0, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
       73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
@@ -96,6 +96,7 @@  struct kconf_id_strings_t
     char kconf_id_strings_str7[sizeof("default")];
     char kconf_id_strings_str8[sizeof("tristate")];
     char kconf_id_strings_str9[sizeof("endchoice")];
+    char kconf_id_strings_str10[sizeof("---help---")];
     char kconf_id_strings_str12[sizeof("def_tristate")];
     char kconf_id_strings_str13[sizeof("def_bool")];
     char kconf_id_strings_str14[sizeof("defconfig_list")];
@@ -119,6 +120,7 @@  struct kconf_id_strings_t
     char kconf_id_strings_str43[sizeof("hex")];
     char kconf_id_strings_str46[sizeof("config")];
     char kconf_id_strings_str47[sizeof("boolean")];
+    char kconf_id_strings_str50[sizeof("imply")];
     char kconf_id_strings_str51[sizeof("string")];
     char kconf_id_strings_str54[sizeof("help")];
     char kconf_id_strings_str56[sizeof("prompt")];
@@ -132,6 +134,7 @@  static const struct kconf_id_strings_t kconf_id_strings_contents =
     "default",
     "tristate",
     "endchoice",
+    "---help---",
     "def_tristate",
     "def_bool",
     "defconfig_list",
@@ -155,6 +158,7 @@  static const struct kconf_id_strings_t kconf_id_strings_contents =
     "hex",
     "config",
     "boolean",
+    "imply",
     "string",
     "help",
     "prompt",
@@ -172,7 +176,7 @@  kconf_id_lookup (register const char *str, register unsigned int len)
 {
   enum
     {
-      TOTAL_KEYWORDS = 33,
+      TOTAL_KEYWORDS = 35,
       MIN_WORD_LENGTH = 2,
       MAX_WORD_LENGTH = 14,
       MIN_HASH_VALUE = 2,
@@ -182,34 +186,36 @@  kconf_id_lookup (register const char *str, register unsigned int len)
   static const struct kconf_id wordlist[] =
     {
       {-1}, {-1},
-#line 25 "scripts/kconfig/zconf.gperf"
+#line 26 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str2,		T_IF,		TF_COMMAND|TF_PARAM},
-#line 36 "scripts/kconfig/zconf.gperf"
+#line 37 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str3,		T_TYPE,		TF_COMMAND, S_INT},
       {-1},
-#line 26 "scripts/kconfig/zconf.gperf"
+#line 27 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str5,		T_ENDIF,	TF_COMMAND},
       {-1},
-#line 29 "scripts/kconfig/zconf.gperf"
+#line 30 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str7,	T_DEFAULT,	TF_COMMAND, S_UNKNOWN},
-#line 31 "scripts/kconfig/zconf.gperf"
+#line 32 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str8,	T_TYPE,		TF_COMMAND, S_TRISTATE},
 #line 20 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str9,	T_ENDCHOICE,	TF_COMMAND},
-      {-1}, {-1},
-#line 32 "scripts/kconfig/zconf.gperf"
+#line 25 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str10,	T_HELP,		TF_COMMAND},
+      {-1},
+#line 33 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str12,	T_DEFAULT,	TF_COMMAND, S_TRISTATE},
-#line 35 "scripts/kconfig/zconf.gperf"
+#line 36 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str13,	T_DEFAULT,	TF_COMMAND, S_BOOLEAN},
-#line 45 "scripts/kconfig/zconf.gperf"
+#line 47 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str14,	T_OPT_DEFCONFIG_LIST,TF_OPTION},
       {-1}, {-1},
-#line 43 "scripts/kconfig/zconf.gperf"
+#line 45 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str17,		T_ON,		TF_PARAM},
-#line 28 "scripts/kconfig/zconf.gperf"
+#line 29 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str18,	T_OPTIONAL,	TF_COMMAND},
       {-1}, {-1},
-#line 42 "scripts/kconfig/zconf.gperf"
+#line 44 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str21,		T_OPTION,	TF_COMMAND},
 #line 17 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str22,	T_ENDMENU,	TF_COMMAND},
@@ -219,51 +225,53 @@  kconf_id_lookup (register const char *str, register unsigned int len)
 #line 23 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str25,	T_MENUCONFIG,	TF_COMMAND},
       {-1},
-#line 44 "scripts/kconfig/zconf.gperf"
+#line 46 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str27,	T_OPT_MODULES,	TF_OPTION},
-#line 47 "scripts/kconfig/zconf.gperf"
+#line 49 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str28,	T_OPT_ALLNOCONFIG_Y,TF_OPTION},
 #line 16 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str29,		T_MENU,		TF_COMMAND},
       {-1},
-#line 39 "scripts/kconfig/zconf.gperf"
+#line 40 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str31,		T_SELECT,	TF_COMMAND},
 #line 21 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str32,	T_COMMENT,	TF_COMMAND},
-#line 46 "scripts/kconfig/zconf.gperf"
+#line 48 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str33,		T_OPT_ENV,	TF_OPTION},
       {-1},
-#line 40 "scripts/kconfig/zconf.gperf"
+#line 42 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str35,		T_RANGE,	TF_COMMAND},
 #line 19 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str36,		T_CHOICE,	TF_COMMAND},
       {-1}, {-1},
-#line 33 "scripts/kconfig/zconf.gperf"
+#line 34 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str39,		T_TYPE,		TF_COMMAND, S_BOOLEAN},
       {-1},
 #line 18 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str41,		T_SOURCE,	TF_COMMAND},
-#line 41 "scripts/kconfig/zconf.gperf"
+#line 43 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str42,	T_VISIBLE,	TF_COMMAND},
-#line 37 "scripts/kconfig/zconf.gperf"
+#line 38 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str43,		T_TYPE,		TF_COMMAND, S_HEX},
       {-1}, {-1},
 #line 22 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str46,		T_CONFIG,	TF_COMMAND},
-#line 34 "scripts/kconfig/zconf.gperf"
+#line 35 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str47,	T_TYPE,		TF_COMMAND, S_BOOLEAN},
-      {-1}, {-1}, {-1},
-#line 38 "scripts/kconfig/zconf.gperf"
+      {-1}, {-1},
+#line 41 "scripts/kconfig/zconf.gperf"
+      {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str50,		T_IMPLY,	TF_COMMAND},
+#line 39 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str51,		T_TYPE,		TF_COMMAND, S_STRING},
       {-1}, {-1},
 #line 24 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str54,		T_HELP,		TF_COMMAND},
       {-1},
-#line 30 "scripts/kconfig/zconf.gperf"
+#line 31 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str56,		T_PROMPT,	TF_COMMAND},
       {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
       {-1}, {-1}, {-1}, {-1}, {-1}, {-1},
-#line 27 "scripts/kconfig/zconf.gperf"
+#line 28 "scripts/kconfig/zconf.gperf"
       {(int)(long)&((struct kconf_id_strings_t *)0)->kconf_id_strings_str72,	T_DEPENDS,	TF_COMMAND}
     };
 
@@ -285,5 +293,5 @@  kconf_id_lookup (register const char *str, register unsigned int len)
     }
   return 0;
 }
-#line 48 "scripts/kconfig/zconf.gperf"
+#line 50 "scripts/kconfig/zconf.gperf"
 
diff --git a/backport/kconf/zconf.lex.c b/backport/kconf/zconf.lex.c
index dd4e86c8..37fdf612 100644
--- a/backport/kconf/zconf.lex.c
+++ b/backport/kconf/zconf.lex.c
@@ -72,7 +72,6 @@  typedef int flex_int32_t;
 typedef unsigned char flex_uint8_t; 
 typedef unsigned short int flex_uint16_t;
 typedef unsigned int flex_uint32_t;
-#endif /* ! C99 */
 
 /* Limits of integral types. */
 #ifndef INT8_MIN
@@ -103,6 +102,8 @@  typedef unsigned int flex_uint32_t;
 #define UINT32_MAX             (4294967295U)
 #endif
 
+#endif /* ! C99 */
+
 #endif /* ! FLEXINT_H */
 
 #ifdef __cplusplus
@@ -159,7 +160,15 @@  typedef unsigned int flex_uint32_t;
 
 /* Size of default input buffer. */
 #ifndef YY_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k.
+ * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
+ * Ditto for the __ia64__ case accordingly.
+ */
+#define YY_BUF_SIZE 32768
+#else
 #define YY_BUF_SIZE 16384
+#endif /* __ia64__ */
 #endif
 
 /* The state buf must be large enough to hold one state per character in the main buffer.
@@ -365,354 +374,338 @@  int zconflineno = 1;
 
 extern char *zconftext;
 #define yytext_ptr zconftext
-static yyconst flex_int16_t yy_nxt[][19] =
+static yyconst flex_int16_t yy_nxt[][18] =
     {
     {
         0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
-        0,    0,    0,    0,    0,    0,    0,    0,    0
+        0,    0,    0,    0,    0,    0,    0,    0
     },
 
     {
        11,   12,   13,   14,   12,   12,   15,   12,   12,   12,
-       12,   12,   12,   12,   12,   12,   12,   12,   12
+       12,   12,   12,   12,   12,   12,   12,   12
     },
 
     {
        11,   12,   13,   14,   12,   12,   15,   12,   12,   12,
-       12,   12,   12,   12,   12,   12,   12,   12,   12
+       12,   12,   12,   12,   12,   12,   12,   12
     },
 
     {
        11,   16,   16,   17,   16,   16,   16,   16,   16,   16,
-       16,   16,   16,   18,   16,   16,   16,   16,   16
+       16,   18,   16,   16,   16,   16,   16,   16
     },
 
     {
        11,   16,   16,   17,   16,   16,   16,   16,   16,   16,
-       16,   16,   16,   18,   16,   16,   16,   16,   16
+       16,   18,   16,   16,   16,   16,   16,   16
 
     },
 
     {
        11,   19,   20,   21,   19,   19,   19,   19,   19,   19,
-       19,   19,   19,   19,   19,   19,   19,   19,   19
+       19,   19,   19,   19,   19,   19,   19,   19
     },
 
     {
        11,   19,   20,   21,   19,   19,   19,   19,   19,   19,
-       19,   19,   19,   19,   19,   19,   19,   19,   19
+       19,   19,   19,   19,   19,   19,   19,   19
     },
 
     {
        11,   22,   22,   23,   22,   24,   22,   22,   24,   22,
-       22,   22,   22,   22,   22,   22,   22,   25,   22
+       22,   22,   22,   22,   22,   22,   25,   22
     },
 
     {
        11,   22,   22,   23,   22,   24,   22,   22,   24,   22,
-       22,   22,   22,   22,   22,   22,   22,   25,   22
+       22,   22,   22,   22,   22,   22,   25,   22
     },
 
     {
        11,   26,   27,   28,   29,   30,   31,   32,   30,   33,
-       34,   35,   36,   36,   37,   38,   39,   40,   41
+       34,   35,   35,   36,   37,   38,   39,   40
 
     },
 
     {
        11,   26,   27,   28,   29,   30,   31,   32,   30,   33,
-       34,   35,   36,   36,   37,   38,   39,   40,   41
+       34,   35,   35,   36,   37,   38,   39,   40
     },
 
     {
       -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11,
-      -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11
+      -11,  -11,  -11,  -11,  -11,  -11,  -11,  -11
     },
 
     {
        11,  -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12,
-      -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12
+      -12,  -12,  -12,  -12,  -12,  -12,  -12,  -12
     },
 
     {
-       11,  -13,   42,   43,  -13,  -13,   44,  -13,  -13,  -13,
-      -13,  -13,  -13,  -13,  -13,  -13,  -13,  -13,  -13
+       11,  -13,   41,   42,  -13,  -13,   43,  -13,  -13,  -13,
+      -13,  -13,  -13,  -13,  -13,  -13,  -13,  -13
     },
 
     {
        11,  -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14,
-      -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14
+      -14,  -14,  -14,  -14,  -14,  -14,  -14,  -14
 
     },
 
     {
-       11,   45,   45,   46,   45,   45,   45,   45,   45,   45,
-       45,   45,   45,   45,   45,   45,   45,   45,   45
+       11,   44,   44,   45,   44,   44,   44,   44,   44,   44,
+       44,   44,   44,   44,   44,   44,   44,   44
     },
 
     {
        11,  -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16,
-      -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16
+      -16,  -16,  -16,  -16,  -16,  -16,  -16,  -16
     },
 
     {
        11,  -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17,
-      -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17
+      -17,  -17,  -17,  -17,  -17,  -17,  -17,  -17
     },
 
     {
        11,  -18,  -18,  -18,  -18,  -18,  -18,  -18,  -18,  -18,
-      -18,  -18,  -18,   47,  -18,  -18,  -18,  -18,  -18
+      -18,   46,  -18,  -18,  -18,  -18,  -18,  -18
     },
 
     {
-       11,   48,   48,  -19,   48,   48,   48,   48,   48,   48,
-       48,   48,   48,   48,   48,   48,   48,   48,   48
+       11,   47,   47,  -19,   47,   47,   47,   47,   47,   47,
+       47,   47,   47,   47,   47,   47,   47,   47
 
     },
 
     {
-       11,  -20,   49,   50,  -20,  -20,  -20,  -20,  -20,  -20,
-      -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20
+       11,  -20,   48,   49,  -20,  -20,  -20,  -20,  -20,  -20,
+      -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20
     },
 
     {
-       11,   51,  -21,  -21,   51,   51,   51,   51,   51,   51,
-       51,   51,   51,   51,   51,   51,   51,   51,   51
+       11,   50,  -21,  -21,   50,   50,   50,   50,   50,   50,
+       50,   50,   50,   50,   50,   50,   50,   50
     },
 
     {
-       11,   52,   52,   53,   52,  -22,   52,   52,  -22,   52,
-       52,   52,   52,   52,   52,   52,   52,  -22,   52
+       11,   51,   51,   52,   51,  -22,   51,   51,  -22,   51,
+       51,   51,   51,   51,   51,   51,  -22,   51
     },
 
     {
        11,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,
-      -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23
+      -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23
     },
 
     {
        11,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,
-      -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24
+      -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24
 
     },
 
     {
-       11,   54,   54,   55,   54,   54,   54,   54,   54,   54,
-       54,   54,   54,   54,   54,   54,   54,   54,   54
+       11,   53,   53,   54,   53,   53,   53,   53,   53,   53,
+       53,   53,   53,   53,   53,   53,   53,   53
     },
 
     {
        11,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,
-      -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26
+      -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26
     },
 
     {
-       11,  -27,   56,  -27,  -27,  -27,  -27,  -27,  -27,  -27,
-      -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27
+       11,  -27,   55,  -27,  -27,  -27,  -27,  -27,  -27,  -27,
+      -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27
     },
 
     {
        11,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,
-      -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28
+      -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28
     },
 
     {
        11,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,
-      -29,  -29,  -29,  -29,  -29,   57,  -29,  -29,  -29
+      -29,  -29,  -29,  -29,   56,  -29,  -29,  -29
 
     },
 
     {
        11,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,
-      -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30
+      -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30
     },
 
     {
-       11,   58,   58,  -31,   58,   58,   58,   58,   58,   58,
-       58,   58,   58,   58,   58,   58,   58,   58,   58
+       11,   57,   57,  -31,   57,   57,   57,   57,   57,   57,
+       57,   57,   57,   57,   57,   57,   57,   57
     },
 
     {
-       11,  -32,  -32,  -32,  -32,  -32,  -32,   59,  -32,  -32,
-      -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32
+       11,  -32,  -32,  -32,  -32,  -32,  -32,   58,  -32,  -32,
+      -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32
     },
 
     {
        11,  -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33,
-      -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33
+      -33,  -33,  -33,  -33,  -33,  -33,  -33,  -33
     },
 
     {
        11,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,
-      -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34
+      -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34
 
     },
 
     {
        11,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,
-      -35,   60,   61,   61,  -35,  -35,  -35,  -35,  -35
+      -35,   59,   59,  -35,  -35,  -35,  -35,  -35
     },
 
     {
        11,  -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,
-      -36,   61,   61,   61,  -36,  -36,  -36,  -36,  -36
+      -36,  -36,  -36,  -36,   60,  -36,  -36,  -36
     },
 
     {
        11,  -37,  -37,  -37,  -37,  -37,  -37,  -37,  -37,  -37,
-      -37,  -37,  -37,  -37,  -37,   62,  -37,  -37,  -37
+      -37,  -37,  -37,  -37,  -37,  -37,  -37,  -37
     },
 
     {
        11,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,
-      -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38
+      -38,  -38,  -38,  -38,   61,  -38,  -38,  -38
     },
 
     {
-       11,  -39,  -39,  -39,  -39,  -39,  -39,  -39,  -39,  -39,
-      -39,  -39,  -39,  -39,  -39,   63,  -39,  -39,  -39
+       11,  -39,  -39,   62,  -39,  -39,  -39,  -39,  -39,  -39,
+      -39,  -39,  -39,  -39,  -39,  -39,  -39,  -39
 
     },
 
     {
-       11,  -40,  -40,   64,  -40,  -40,  -40,  -40,  -40,  -40,
-      -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40
+       11,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,
+      -40,  -40,  -40,  -40,  -40,  -40,  -40,   63
     },
 
     {
-       11,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,
-      -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,   65
+       11,  -41,   41,   42,  -41,  -41,   43,  -41,  -41,  -41,
+      -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41
     },
 
     {
-       11,  -42,   42,   43,  -42,  -42,   44,  -42,  -42,  -42,
-      -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42
+       11,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,
+      -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42
     },
 
     {
-       11,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,
-      -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43
+       11,   44,   44,   45,   44,   44,   44,   44,   44,   44,
+       44,   44,   44,   44,   44,   44,   44,   44
     },
 
     {
-       11,   45,   45,   46,   45,   45,   45,   45,   45,   45,
-       45,   45,   45,   45,   45,   45,   45,   45,   45
+       11,   44,   44,   45,   44,   44,   44,   44,   44,   44,
+       44,   44,   44,   44,   44,   44,   44,   44
 
     },
 
     {
-       11,   45,   45,   46,   45,   45,   45,   45,   45,   45,
-       45,   45,   45,   45,   45,   45,   45,   45,   45
+       11,  -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,
+      -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45
     },
 
     {
        11,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,
-      -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46
+      -46,   46,  -46,  -46,  -46,  -46,  -46,  -46
     },
 
     {
-       11,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47,
-      -47,  -47,  -47,   47,  -47,  -47,  -47,  -47,  -47
+       11,   47,   47,  -47,   47,   47,   47,   47,   47,   47,
+       47,   47,   47,   47,   47,   47,   47,   47
     },
 
     {
-       11,   48,   48,  -48,   48,   48,   48,   48,   48,   48,
-       48,   48,   48,   48,   48,   48,   48,   48,   48
+       11,  -48,   48,   49,  -48,  -48,  -48,  -48,  -48,  -48,
+      -48,  -48,  -48,  -48,  -48,  -48,  -48,  -48
     },
 
     {
-       11,  -49,   49,   50,  -49,  -49,  -49,  -49,  -49,  -49,
-      -49,  -49,  -49,  -49,  -49,  -49,  -49,  -49,  -49
+       11,   50,  -49,  -49,   50,   50,   50,   50,   50,   50,
+       50,   50,   50,   50,   50,   50,   50,   50
 
     },
 
     {
-       11,   51,  -50,  -50,   51,   51,   51,   51,   51,   51,
-       51,   51,   51,   51,   51,   51,   51,   51,   51
+       11,  -50,  -50,  -50,  -50,  -50,  -50,  -50,  -50,  -50,
+      -50,  -50,  -50,  -50,  -50,  -50,  -50,  -50
     },
 
     {
-       11,  -51,  -51,  -51,  -51,  -51,  -51,  -51,  -51,  -51,
-      -51,  -51,  -51,  -51,  -51,  -51,  -51,  -51,  -51
+       11,   51,   51,   52,   51,  -51,   51,   51,  -51,   51,
+       51,   51,   51,   51,   51,   51,  -51,   51
     },
 
     {
-       11,   52,   52,   53,   52,  -52,   52,   52,  -52,   52,
-       52,   52,   52,   52,   52,   52,   52,  -52,   52
+       11,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,
+      -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52
     },
 
     {
-       11,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,
-      -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53
+       11,  -53,  -53,   54,  -53,  -53,  -53,  -53,  -53,  -53,
+      -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53
     },
 
     {
-       11,  -54,  -54,   55,  -54,  -54,  -54,  -54,  -54,  -54,
-      -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54
+       11,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,
+      -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54
 
     },
 
     {
-       11,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,
-      -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55
+       11,  -55,   55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,
+      -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55
     },
 
     {
-       11,  -56,   56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,
-      -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56
+       11,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,
+      -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56
     },
 
     {
-       11,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,
-      -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57
+       11,   57,   57,  -57,   57,   57,   57,   57,   57,   57,
+       57,   57,   57,   57,   57,   57,   57,   57
     },
 
     {
-       11,   58,   58,  -58,   58,   58,   58,   58,   58,   58,
-       58,   58,   58,   58,   58,   58,   58,   58,   58
+       11,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,
+      -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58
     },
 
     {
        11,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,
-      -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59
+      -59,   59,   59,  -59,  -59,  -59,  -59,  -59
 
     },
 
     {
        11,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,
-      -60,   66,   61,   61,  -60,  -60,  -60,  -60,  -60
+      -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60
     },
 
     {
        11,  -61,  -61,  -61,  -61,  -61,  -61,  -61,  -61,  -61,
-      -61,   61,   61,   61,  -61,  -61,  -61,  -61,  -61
+      -61,  -61,  -61,  -61,  -61,  -61,  -61,  -61
     },
 
     {
        11,  -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62,
-      -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62
+      -62,  -62,  -62,  -62,  -62,  -62,  -62,  -62
     },
 
     {
        11,  -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63,
-      -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63
-    },
-
-    {
-       11,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,
-      -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64
-
-    },
-
-    {
-       11,  -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,
-      -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65
-    },
-
-    {
-       11,  -66,  -66,  -66,  -66,  -66,  -66,  -66,  -66,  -66,
-      -66,   61,   61,   61,  -66,  -66,  -66,  -66,  -66
+      -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63
     },
 
     } ;
@@ -732,8 +725,8 @@  static void yy_fatal_error (yyconst char msg[]  );
 	*yy_cp = '\0'; \
 	(yy_c_buf_p) = yy_cp;
 
-#define YY_NUM_RULES 38
-#define YY_END_OF_BUFFER 39
+#define YY_NUM_RULES 37
+#define YY_END_OF_BUFFER 38
 /* This struct is not used in this scanner,
    but its presence is necessary. */
 struct yy_trans_info
@@ -741,15 +734,15 @@  struct yy_trans_info
 	flex_int32_t yy_verify;
 	flex_int32_t yy_nxt;
 	};
-static yyconst flex_int16_t yy_accept[67] =
+static yyconst flex_int16_t yy_accept[64] =
     {   0,
         0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
-       39,    5,    4,    2,    3,    7,    8,    6,   37,   34,
-       36,   29,   33,   32,   31,   27,   26,   21,   13,   20,
-       24,   27,   11,   12,   23,   23,   18,   14,   19,   27,
-       27,    4,    2,    3,    3,    1,    6,   37,   34,   36,
-       35,   29,   28,   31,   30,   26,   15,   24,    9,   23,
-       23,   16,   17,   25,   10,   22
+       38,    5,    4,    2,    3,    7,    8,    6,   36,   33,
+       35,   28,   32,   31,   30,   26,   25,   21,   13,   20,
+       23,   26,   11,   12,   22,   18,   14,   19,   26,   26,
+        4,    2,    3,    3,    1,    6,   36,   33,   35,   34,
+       28,   27,   30,   29,   25,   15,   23,    9,   22,   16,
+       17,   24,   10
     } ;
 
 static yyconst flex_int32_t yy_ec[256] =
@@ -758,16 +751,16 @@  static yyconst flex_int32_t yy_ec[256] =
         1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
         1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
         1,    2,    4,    5,    6,    1,    1,    7,    8,    9,
-       10,    1,    1,    1,   11,   12,   12,   13,   13,   13,
-       13,   13,   13,   13,   13,   13,   13,    1,    1,   14,
-       15,   16,    1,    1,   13,   13,   13,   13,   13,   13,
-       13,   13,   13,   13,   13,   13,   13,   13,   13,   13,
-       13,   13,   13,   13,   13,   13,   13,   13,   13,   13,
-        1,   17,    1,    1,   13,    1,   13,   13,   13,   13,
-
-       13,   13,   13,   13,   13,   13,   13,   13,   13,   13,
-       13,   13,   13,   13,   13,   13,   13,   13,   13,   13,
-       13,   13,    1,   18,    1,    1,    1,    1,    1,    1,
+       10,    1,    1,    1,   11,   12,   12,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,    1,    1,   13,
+       14,   15,    1,    1,   11,   11,   11,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+        1,   16,    1,    1,   11,    1,   11,   11,   11,   11,
+
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   11,   11,   11,   11,
+       11,   11,    1,   17,    1,    1,    1,    1,    1,    1,
         1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
         1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
         1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
@@ -861,6 +854,13 @@  static void alloc_string(const char *str, int size)
 	text[size] = 0;
 }
 
+static void warn_ignored_character(char chr)
+{
+	fprintf(stderr,
+	        "%s:%d:warning: ignoring unsupported character '%c'\n",
+	        zconf_curname(), zconf_lineno(), chr);
+}
+
 #define INITIAL 0
 #define COMMAND 1
 #define HELP 2
@@ -944,7 +944,12 @@  static int input (void );
 
 /* Amount of stuff to slurp up with each read. */
 #ifndef YY_READ_BUF_SIZE
+#ifdef __ia64__
+/* On IA-64, the buffer size is 16k, not 8k */
+#define YY_READ_BUF_SIZE 16384
+#else
 #define YY_READ_BUF_SIZE 8192
+#endif /* __ia64__ */
 #endif
 
 /* Copy whatever the last rule matched to the standard output. */
@@ -952,7 +957,7 @@  static int input (void );
 /* This used to be an fputs(), but since the string might contain NUL's,
  * we now use fwrite().
  */
-#define ECHO fwrite( zconftext, zconfleng, 1, zconfout )
+#define ECHO do { if (fwrite( zconftext, zconfleng, 1, zconfout )) {} } while (0)
 #endif
 
 /* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
@@ -1132,7 +1137,7 @@  YY_RULE_SETUP
 	YY_BREAK
 case 7:
 YY_RULE_SETUP
-
+warn_ignored_character(*zconftext);
 	YY_BREAK
 case 8:
 /* rule 8 can match eol */
@@ -1203,10 +1208,6 @@  BEGIN(INITIAL); current_file->lineno++; return T_EOL;
 	YY_BREAK
 case 22:
 YY_RULE_SETUP
-/* ignore */
-	YY_BREAK
-case 23:
-YY_RULE_SETUP
 {
 		const struct kconf_id *id = kconf_id_lookup(zconftext, zconfleng);
 		if (id && id->flags & TF_PARAM) {
@@ -1218,26 +1219,22 @@  YY_RULE_SETUP
 		return T_WORD;
 	}
 	YY_BREAK
-case 24:
+case 23:
 YY_RULE_SETUP
 /* comment */
 	YY_BREAK
-case 25:
-/* rule 25 can match eol */
+case 24:
+/* rule 24 can match eol */
 YY_RULE_SETUP
 current_file->lineno++;
 	YY_BREAK
-case 26:
+case 25:
 YY_RULE_SETUP
 
 	YY_BREAK
-case 27:
+case 26:
 YY_RULE_SETUP
-{
-		fprintf(stderr,
-		        "%s:%d:warning: ignoring unsupported character '%c'\n",
-		        zconf_curname(), zconf_lineno(), *zconftext);
-	}
+warn_ignored_character(*zconftext);
 	YY_BREAK
 case YY_STATE_EOF(PARAM):
 {
@@ -1245,8 +1242,8 @@  case YY_STATE_EOF(PARAM):
 	}
 	YY_BREAK
 
-case 28:
-/* rule 28 can match eol */
+case 27:
+/* rule 27 can match eol */
 *yy_cp = (yy_hold_char); /* undo effects of setting up zconftext */
 (yy_c_buf_p) = yy_cp -= 1;
 YY_DO_BEFORE_ACTION; /* set up zconftext again */
@@ -1257,14 +1254,14 @@  YY_RULE_SETUP
 		return T_WORD_QUOTE;
 	}
 	YY_BREAK
-case 29:
+case 28:
 YY_RULE_SETUP
 {
 		append_string(zconftext, zconfleng);
 	}
 	YY_BREAK
-case 30:
-/* rule 30 can match eol */
+case 29:
+/* rule 29 can match eol */
 *yy_cp = (yy_hold_char); /* undo effects of setting up zconftext */
 (yy_c_buf_p) = yy_cp -= 1;
 YY_DO_BEFORE_ACTION; /* set up zconftext again */
@@ -1275,13 +1272,13 @@  YY_RULE_SETUP
 		return T_WORD_QUOTE;
 	}
 	YY_BREAK
-case 31:
+case 30:
 YY_RULE_SETUP
 {
 		append_string(zconftext + 1, zconfleng - 1);
 	}
 	YY_BREAK
-case 32:
+case 31:
 YY_RULE_SETUP
 {
 		if (str == zconftext[0]) {
@@ -1292,8 +1289,8 @@  YY_RULE_SETUP
 			append_string(zconftext, 1);
 	}
 	YY_BREAK
-case 33:
-/* rule 33 can match eol */
+case 32:
+/* rule 32 can match eol */
 YY_RULE_SETUP
 {
 		printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
@@ -1308,7 +1305,7 @@  case YY_STATE_EOF(STRING):
 	}
 	YY_BREAK
 
-case 34:
+case 33:
 YY_RULE_SETUP
 {
 		ts = 0;
@@ -1333,8 +1330,8 @@  YY_RULE_SETUP
 		}
 	}
 	YY_BREAK
-case 35:
-/* rule 35 can match eol */
+case 34:
+/* rule 34 can match eol */
 *yy_cp = (yy_hold_char); /* undo effects of setting up zconftext */
 (yy_c_buf_p) = yy_cp -= 1;
 YY_DO_BEFORE_ACTION; /* set up zconftext again */
@@ -1345,15 +1342,15 @@  YY_RULE_SETUP
 		return T_HELPTEXT;
 	}
 	YY_BREAK
-case 36:
-/* rule 36 can match eol */
+case 35:
+/* rule 35 can match eol */
 YY_RULE_SETUP
 {
 		current_file->lineno++;
 		append_string("\n", 1);
 	}
 	YY_BREAK
-case 37:
+case 36:
 YY_RULE_SETUP
 {
 		while (zconfleng) {
@@ -1384,7 +1381,7 @@  case YY_STATE_EOF(COMMAND):
 	yyterminate();
 }
 	YY_BREAK
-case 38:
+case 37:
 YY_RULE_SETUP
 YY_FATAL_ERROR( "flex scanner jammed" );
 	YY_BREAK
@@ -2114,8 +2111,8 @@  YY_BUFFER_STATE zconf_scan_string (yyconst char * yystr )
 
 /** Setup the input buffer state to scan the given bytes. The next call to zconflex() will
  * scan from a @e copy of @a bytes.
- * @param bytes the byte buffer to scan
- * @param len the number of bytes in the buffer pointed to by @a bytes.
+ * @param yybytes the byte buffer to scan
+ * @param _yybytes_len the number of bytes in the buffer pointed to by @a bytes.
  * 
  * @return the newly allocated buffer state object.
  */
diff --git a/backport/kconf/zconf.tab.c b/backport/kconf/zconf.tab.c
index 7a4d658c..65b7515a 100644
--- a/backport/kconf/zconf.tab.c
+++ b/backport/kconf/zconf.tab.c
@@ -1,19 +1,19 @@ 
-/* A Bison parser, made by GNU Bison 2.5.1.  */
+/* A Bison parser, made by GNU Bison 3.0.4.  */
 
 /* Bison implementation for Yacc-like parsers in C
-   
-      Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation, Inc.
-   
+
+   Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation, Inc.
+
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
-   
+
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
-   
+
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
@@ -26,7 +26,7 @@ 
    special exception, which will cause the skeleton and the resulting
    Bison output files to be licensed under the GNU General Public
    License without this special exception.
-   
+
    This special exception was added by the Free Software Foundation in
    version 2.2 of Bison.  */
 
@@ -44,7 +44,7 @@ 
 #define YYBISON 1
 
 /* Bison version.  */
-#define YYBISON_VERSION "2.5.1"
+#define YYBISON_VERSION "3.0.4"
 
 /* Skeleton name.  */
 #define YYSKELETON_NAME "yacc.c"
@@ -58,18 +58,16 @@ 
 /* Pull parsers.  */
 #define YYPULL 1
 
-/* Using locations.  */
-#define YYLSP_NEEDED 0
 
 /* Substitute the variable and function names.  */
 #define yyparse         zconfparse
 #define yylex           zconflex
 #define yyerror         zconferror
-#define yylval          zconflval
-#define yychar          zconfchar
 #define yydebug         zconfdebug
 #define yynerrs         zconfnerrs
 
+#define yylval          zconflval
+#define yychar          zconfchar
 
 /* Copy the first part of user declarations.  */
 
@@ -108,19 +106,14 @@  static struct menu *current_menu, *current_entry;
 
 
 
-# ifndef YY_NULL
+# ifndef YY_NULLPTR
 #  if defined __cplusplus && 201103L <= __cplusplus
-#   define YY_NULL nullptr
+#   define YY_NULLPTR nullptr
 #  else
-#   define YY_NULL 0
+#   define YY_NULLPTR 0
 #  endif
 # endif
 
-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG 1
-#endif
-
 /* Enabling verbose error messages.  */
 #ifdef YYERROR_VERBOSE
 # undef YYERROR_VERBOSE
@@ -129,62 +122,65 @@  static struct menu *current_menu, *current_entry;
 # define YYERROR_VERBOSE 0
 #endif
 
-/* Enabling the token table.  */
-#ifndef YYTOKEN_TABLE
-# define YYTOKEN_TABLE 0
-#endif
 
+/* Debug traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 1
+#endif
+#if YYDEBUG
+extern int zconfdebug;
+#endif
 
-/* Tokens.  */
+/* Token type.  */
 #ifndef YYTOKENTYPE
 # define YYTOKENTYPE
-   /* Put the tokens into the symbol table, so that GDB and other debuggers
-      know about them.  */
-   enum yytokentype {
-     T_MAINMENU = 258,
-     T_MENU = 259,
-     T_ENDMENU = 260,
-     T_SOURCE = 261,
-     T_CHOICE = 262,
-     T_ENDCHOICE = 263,
-     T_COMMENT = 264,
-     T_CONFIG = 265,
-     T_MENUCONFIG = 266,
-     T_HELP = 267,
-     T_HELPTEXT = 268,
-     T_IF = 269,
-     T_ENDIF = 270,
-     T_DEPENDS = 271,
-     T_OPTIONAL = 272,
-     T_PROMPT = 273,
-     T_TYPE = 274,
-     T_DEFAULT = 275,
-     T_SELECT = 276,
-     T_RANGE = 277,
-     T_VISIBLE = 278,
-     T_OPTION = 279,
-     T_ON = 280,
-     T_WORD = 281,
-     T_WORD_QUOTE = 282,
-     T_UNEQUAL = 283,
-     T_LESS = 284,
-     T_LESS_EQUAL = 285,
-     T_GREATER = 286,
-     T_GREATER_EQUAL = 287,
-     T_CLOSE_PAREN = 288,
-     T_OPEN_PAREN = 289,
-     T_EOL = 290,
-     T_OR = 291,
-     T_AND = 292,
-     T_EQUAL = 293,
-     T_NOT = 294
-   };
+  enum yytokentype
+  {
+    T_MAINMENU = 258,
+    T_MENU = 259,
+    T_ENDMENU = 260,
+    T_SOURCE = 261,
+    T_CHOICE = 262,
+    T_ENDCHOICE = 263,
+    T_COMMENT = 264,
+    T_CONFIG = 265,
+    T_MENUCONFIG = 266,
+    T_HELP = 267,
+    T_HELPTEXT = 268,
+    T_IF = 269,
+    T_ENDIF = 270,
+    T_DEPENDS = 271,
+    T_OPTIONAL = 272,
+    T_PROMPT = 273,
+    T_TYPE = 274,
+    T_DEFAULT = 275,
+    T_SELECT = 276,
+    T_IMPLY = 277,
+    T_RANGE = 278,
+    T_VISIBLE = 279,
+    T_OPTION = 280,
+    T_ON = 281,
+    T_WORD = 282,
+    T_WORD_QUOTE = 283,
+    T_UNEQUAL = 284,
+    T_LESS = 285,
+    T_LESS_EQUAL = 286,
+    T_GREATER = 287,
+    T_GREATER_EQUAL = 288,
+    T_CLOSE_PAREN = 289,
+    T_OPEN_PAREN = 290,
+    T_EOL = 291,
+    T_OR = 292,
+    T_AND = 293,
+    T_EQUAL = 294,
+    T_NOT = 295
+  };
 #endif
 
-
-
+/* Value type.  */
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
-typedef union YYSTYPE
+
+union YYSTYPE
 {
 
 
@@ -196,14 +192,20 @@  typedef union YYSTYPE
 	const struct kconf_id *id;
 
 
+};
 
-} YYSTYPE;
+typedef union YYSTYPE YYSTYPE;
 # define YYSTYPE_IS_TRIVIAL 1
-# define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
 #endif
 
 
+extern YYSTYPE zconflval;
+
+int zconfparse (void);
+
+
+
 /* Copy the second part of user declarations.  */
 
 
@@ -224,11 +226,8 @@  typedef unsigned char yytype_uint8;
 
 #ifdef YYTYPE_INT8
 typedef YYTYPE_INT8 yytype_int8;
-#elif (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-typedef signed char yytype_int8;
 #else
-typedef short int yytype_int8;
+typedef signed char yytype_int8;
 #endif
 
 #ifdef YYTYPE_UINT16
@@ -248,8 +247,7 @@  typedef short int yytype_int16;
 #  define YYSIZE_T __SIZE_TYPE__
 # elif defined size_t
 #  define YYSIZE_T size_t
-# elif ! defined YYSIZE_T && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
+# elif ! defined YYSIZE_T
 #  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
 #  define YYSIZE_T size_t
 # else
@@ -263,38 +261,67 @@  typedef short int yytype_int16;
 # if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
-#   define YY_(msgid) dgettext ("bison-runtime", msgid)
+#   define YY_(Msgid) dgettext ("bison-runtime", Msgid)
 #  endif
 # endif
 # ifndef YY_
-#  define YY_(msgid) msgid
+#  define YY_(Msgid) Msgid
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE
+# if (defined __GNUC__                                               \
+      && (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)))  \
+     || defined __SUNPRO_C && 0x5110 <= __SUNPRO_C
+#  define YY_ATTRIBUTE(Spec) __attribute__(Spec)
+# else
+#  define YY_ATTRIBUTE(Spec) /* empty */
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE_PURE
+# define YY_ATTRIBUTE_PURE   YY_ATTRIBUTE ((__pure__))
+#endif
+
+#ifndef YY_ATTRIBUTE_UNUSED
+# define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__))
+#endif
+
+#if !defined _Noreturn \
+     && (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112)
+# if defined _MSC_VER && 1200 <= _MSC_VER
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn YY_ATTRIBUTE ((__noreturn__))
 # endif
 #endif
 
 /* Suppress unused-variable warnings by "using" E.  */
 #if ! defined lint || defined __GNUC__
-# define YYUSE(e) ((void) (e))
+# define YYUSE(E) ((void) (E))
 #else
-# define YYUSE(e) /* empty */
+# define YYUSE(E) /* empty */
 #endif
 
-/* Identity function, used to suppress warnings about constant conditions.  */
-#ifndef lint
-# define YYID(n) (n)
-#else
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-static int
-YYID (int yyi)
+#if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
+/* Suppress an incorrect diagnostic about yylval being uninitialized.  */
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
+    _Pragma ("GCC diagnostic push") \
+    _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
+    _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END \
+    _Pragma ("GCC diagnostic pop")
 #else
-static int
-YYID (yyi)
-    int yyi;
+# define YY_INITIAL_VALUE(Value) Value
 #endif
-{
-  return yyi;
-}
+#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END
 #endif
+#ifndef YY_INITIAL_VALUE
+# define YY_INITIAL_VALUE(Value) /* Nothing. */
+#endif
+
 
 #if ! defined yyoverflow || YYERROR_VERBOSE
 
@@ -313,8 +340,7 @@  YYID (yyi)
 #    define alloca _alloca
 #   else
 #    define YYSTACK_ALLOC alloca
-#    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
+#    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
 #     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
       /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
 #     ifndef EXIT_SUCCESS
@@ -326,8 +352,8 @@  YYID (yyi)
 # endif
 
 # ifdef YYSTACK_ALLOC
-   /* Pacify GCC's `empty if-body' warning.  */
-#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
+   /* Pacify GCC's 'empty if-body' warning.  */
+#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
 #  ifndef YYSTACK_ALLOC_MAXIMUM
     /* The OS might guarantee only one guard page at the bottom of the stack,
        and a page size can be as small as 4096 bytes.  So we cannot safely
@@ -343,7 +369,7 @@  YYID (yyi)
 #  endif
 #  if (defined __cplusplus && ! defined EXIT_SUCCESS \
        && ! ((defined YYMALLOC || defined malloc) \
-	     && (defined YYFREE || defined free)))
+             && (defined YYFREE || defined free)))
 #   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
 #   ifndef EXIT_SUCCESS
 #    define EXIT_SUCCESS 0
@@ -351,15 +377,13 @@  YYID (yyi)
 #  endif
 #  ifndef YYMALLOC
 #   define YYMALLOC malloc
-#   if ! defined malloc && ! defined EXIT_SUCCESS && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
+#   if ! defined malloc && ! defined EXIT_SUCCESS
 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
 #  ifndef YYFREE
 #   define YYFREE free
-#   if ! defined free && ! defined EXIT_SUCCESS && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
+#   if ! defined free && ! defined EXIT_SUCCESS
 void free (void *); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
@@ -369,7 +393,7 @@  void free (void *); /* INFRINGES ON USER NAME SPACE */
 
 #if (! defined yyoverflow \
      && (! defined __cplusplus \
-	 || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+         || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
 
 /* A type that is properly aligned for any stack member.  */
 union yyalloc
@@ -394,16 +418,16 @@  union yyalloc
    elements in the stack, and YYPTR gives the new location of the
    stack.  Advance YYPTR to a properly aligned location for the next
    stack.  */
-# define YYSTACK_RELOCATE(Stack_alloc, Stack)				\
-    do									\
-      {									\
-	YYSIZE_T yynewbytes;						\
-	YYCOPY (&yyptr->Stack_alloc, Stack, yysize);			\
-	Stack = &yyptr->Stack_alloc;					\
-	yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
-	yyptr += yynewbytes / sizeof (*yyptr);				\
-      }									\
-    while (YYID (0))
+# define YYSTACK_RELOCATE(Stack_alloc, Stack)                           \
+    do                                                                  \
+      {                                                                 \
+        YYSIZE_T yynewbytes;                                            \
+        YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
+        Stack = &yyptr->Stack_alloc;                                    \
+        yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
+        yyptr += yynewbytes / sizeof (*yyptr);                          \
+      }                                                                 \
+    while (0)
 
 #endif
 
@@ -422,7 +446,7 @@  union yyalloc
           for (yyi = 0; yyi < (Count); yyi++)   \
             (Dst)[yyi] = (Src)[yyi];            \
         }                                       \
-      while (YYID (0))
+      while (0)
 #  endif
 # endif
 #endif /* !YYCOPY_NEEDED */
@@ -430,25 +454,27 @@  union yyalloc
 /* YYFINAL -- State number of the termination state.  */
 #define YYFINAL  11
 /* YYLAST -- Last index in YYTABLE.  */
-#define YYLAST   298
+#define YYLAST   301
 
 /* YYNTOKENS -- Number of terminals.  */
-#define YYNTOKENS  40
+#define YYNTOKENS  41
 /* YYNNTS -- Number of nonterminals.  */
 #define YYNNTS  50
 /* YYNRULES -- Number of rules.  */
-#define YYNRULES  122
-/* YYNRULES -- Number of states.  */
-#define YYNSTATES  199
+#define YYNRULES  124
+/* YYNSTATES -- Number of states.  */
+#define YYNSTATES  204
 
-/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
+/* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
+   by yylex, with out-of-bounds checking.  */
 #define YYUNDEFTOK  2
-#define YYMAXUTOK   294
+#define YYMAXUTOK   295
 
-#define YYTRANSLATE(YYX)						\
+#define YYTRANSLATE(YYX)                                                \
   ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
 
-/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
+/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
+   as returned by yylex, without out-of-bounds checking.  */
 static const yytype_uint8 yytranslate[] =
 {
        0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
@@ -480,90 +506,30 @@  static const yytype_uint8 yytranslate[] =
        5,     6,     7,     8,     9,    10,    11,    12,    13,    14,
       15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
       25,    26,    27,    28,    29,    30,    31,    32,    33,    34,
-      35,    36,    37,    38,    39
+      35,    36,    37,    38,    39,    40
 };
 
 #if YYDEBUG
-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
-   YYRHS.  */
-static const yytype_uint16 yyprhs[] =
-{
-       0,     0,     3,     6,     8,    11,    13,    14,    17,    20,
-      23,    26,    31,    36,    40,    42,    44,    46,    48,    50,
-      52,    54,    56,    58,    60,    62,    64,    66,    68,    72,
-      75,    79,    82,    86,    89,    90,    93,    96,    99,   102,
-     105,   108,   112,   117,   122,   127,   133,   137,   138,   142,
-     143,   146,   150,   153,   155,   159,   160,   163,   166,   169,
-     172,   175,   180,   184,   187,   192,   193,   196,   200,   202,
-     206,   207,   210,   213,   216,   220,   224,   228,   230,   234,
-     235,   238,   241,   244,   248,   252,   255,   258,   261,   262,
-     265,   268,   271,   276,   277,   280,   283,   286,   287,   290,
-     292,   294,   297,   300,   303,   305,   308,   309,   312,   314,
-     318,   322,   326,   330,   334,   338,   342,   345,   349,   353,
-     355,   357,   358
-};
-
-/* YYRHS -- A `-1'-separated list of the rules' RHS.  */
-static const yytype_int8 yyrhs[] =
-{
-      41,     0,    -1,    85,    42,    -1,    42,    -1,    67,    43,
-      -1,    43,    -1,    -1,    43,    45,    -1,    43,    59,    -1,
-      43,    71,    -1,    43,    84,    -1,    43,    26,     1,    35,
-      -1,    43,    44,     1,    35,    -1,    43,     1,    35,    -1,
-      16,    -1,    18,    -1,    19,    -1,    21,    -1,    17,    -1,
-      22,    -1,    20,    -1,    23,    -1,    35,    -1,    65,    -1,
-      75,    -1,    48,    -1,    50,    -1,    73,    -1,    26,     1,
-      35,    -1,     1,    35,    -1,    10,    26,    35,    -1,    47,
-      51,    -1,    11,    26,    35,    -1,    49,    51,    -1,    -1,
-      51,    52,    -1,    51,    53,    -1,    51,    79,    -1,    51,
-      77,    -1,    51,    46,    -1,    51,    35,    -1,    19,    82,
-      35,    -1,    18,    83,    86,    35,    -1,    20,    87,    86,
-      35,    -1,    21,    26,    86,    35,    -1,    22,    88,    88,
-      86,    35,    -1,    24,    54,    35,    -1,    -1,    54,    26,
-      55,    -1,    -1,    38,    83,    -1,     7,    89,    35,    -1,
-      56,    60,    -1,    84,    -1,    57,    62,    58,    -1,    -1,
-      60,    61,    -1,    60,    79,    -1,    60,    77,    -1,    60,
-      35,    -1,    60,    46,    -1,    18,    83,    86,    35,    -1,
-      19,    82,    35,    -1,    17,    35,    -1,    20,    26,    86,
-      35,    -1,    -1,    62,    45,    -1,    14,    87,    85,    -1,
-      84,    -1,    63,    66,    64,    -1,    -1,    66,    45,    -1,
-      66,    71,    -1,    66,    59,    -1,     3,    83,    85,    -1,
-       4,    83,    35,    -1,    68,    80,    78,    -1,    84,    -1,
-      69,    72,    70,    -1,    -1,    72,    45,    -1,    72,    71,
-      -1,    72,    59,    -1,     6,    83,    35,    -1,     9,    83,
-      35,    -1,    74,    78,    -1,    12,    35,    -1,    76,    13,
-      -1,    -1,    78,    79,    -1,    78,    35,    -1,    78,    46,
-      -1,    16,    25,    87,    35,    -1,    -1,    80,    81,    -1,
-      80,    35,    -1,    23,    86,    -1,    -1,    83,    86,    -1,
-      26,    -1,    27,    -1,     5,    35,    -1,     8,    35,    -1,
-      15,    35,    -1,    35,    -1,    85,    35,    -1,    -1,    14,
-      87,    -1,    88,    -1,    88,    29,    88,    -1,    88,    30,
-      88,    -1,    88,    31,    88,    -1,    88,    32,    88,    -1,
-      88,    38,    88,    -1,    88,    28,    88,    -1,    34,    87,
-      33,    -1,    39,    87,    -1,    87,    36,    87,    -1,    87,
-      37,    87,    -1,    26,    -1,    27,    -1,    -1,    26,    -1
-};
-
-/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
+  /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_uint16 yyrline[] =
 {
-       0,   108,   108,   108,   110,   110,   112,   114,   115,   116,
-     117,   118,   119,   123,   127,   127,   127,   127,   127,   127,
-     127,   127,   131,   132,   133,   134,   135,   136,   140,   141,
-     147,   155,   161,   169,   179,   181,   182,   183,   184,   185,
-     186,   189,   197,   203,   213,   219,   225,   228,   230,   241,
-     242,   247,   256,   261,   269,   272,   274,   275,   276,   277,
-     278,   281,   287,   298,   304,   314,   316,   321,   329,   337,
-     340,   342,   343,   344,   349,   356,   363,   368,   376,   379,
-     381,   382,   383,   386,   394,   401,   408,   414,   421,   423,
-     424,   425,   428,   436,   438,   439,   442,   449,   451,   456,
-     457,   460,   461,   462,   466,   467,   470,   471,   474,   475,
-     476,   477,   478,   479,   480,   481,   482,   483,   484,   487,
-     488,   491,   492
+       0,   109,   109,   109,   111,   111,   113,   115,   116,   117,
+     118,   119,   120,   124,   128,   128,   128,   128,   128,   128,
+     128,   128,   128,   132,   133,   134,   135,   136,   137,   141,
+     142,   148,   156,   162,   170,   180,   182,   183,   184,   185,
+     186,   187,   190,   198,   204,   214,   220,   226,   232,   235,
+     237,   248,   249,   254,   263,   268,   276,   279,   281,   282,
+     283,   284,   285,   288,   294,   305,   311,   321,   323,   328,
+     336,   344,   347,   349,   350,   351,   356,   363,   370,   375,
+     383,   386,   388,   389,   390,   393,   401,   408,   415,   421,
+     428,   430,   431,   432,   435,   443,   445,   446,   449,   456,
+     458,   463,   464,   467,   468,   469,   473,   474,   477,   478,
+     481,   482,   483,   484,   485,   486,   487,   488,   489,   490,
+     491,   494,   495,   498,   499
 };
 #endif
 
-#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+#if YYDEBUG || YYERROR_VERBOSE || 0
 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
    First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
 static const char *const yytname[] =
@@ -571,9 +537,9 @@  static const char *const yytname[] =
   "$end", "error", "$undefined", "T_MAINMENU", "T_MENU", "T_ENDMENU",
   "T_SOURCE", "T_CHOICE", "T_ENDCHOICE", "T_COMMENT", "T_CONFIG",
   "T_MENUCONFIG", "T_HELP", "T_HELPTEXT", "T_IF", "T_ENDIF", "T_DEPENDS",
-  "T_OPTIONAL", "T_PROMPT", "T_TYPE", "T_DEFAULT", "T_SELECT", "T_RANGE",
-  "T_VISIBLE", "T_OPTION", "T_ON", "T_WORD", "T_WORD_QUOTE", "T_UNEQUAL",
-  "T_LESS", "T_LESS_EQUAL", "T_GREATER", "T_GREATER_EQUAL",
+  "T_OPTIONAL", "T_PROMPT", "T_TYPE", "T_DEFAULT", "T_SELECT", "T_IMPLY",
+  "T_RANGE", "T_VISIBLE", "T_OPTION", "T_ON", "T_WORD", "T_WORD_QUOTE",
+  "T_UNEQUAL", "T_LESS", "T_LESS_EQUAL", "T_GREATER", "T_GREATER_EQUAL",
   "T_CLOSE_PAREN", "T_OPEN_PAREN", "T_EOL", "T_OR", "T_AND", "T_EQUAL",
   "T_NOT", "$accept", "input", "start", "stmt_list", "option_name",
   "common_stmt", "option_error", "config_entry_start", "config_stmt",
@@ -585,260 +551,254 @@  static const char *const yytname[] =
   "menu_entry", "menu_end", "menu_stmt", "menu_block", "source_stmt",
   "comment", "comment_stmt", "help_start", "help", "depends_list",
   "depends", "visibility_list", "visible", "prompt_stmt_opt", "prompt",
-  "end", "nl", "if_expr", "expr", "symbol", "word_opt", YY_NULL
+  "end", "nl", "if_expr", "expr", "symbol", "word_opt", YY_NULLPTR
 };
 #endif
 
 # ifdef YYPRINT
-/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
-   token YYLEX-NUM.  */
+/* YYTOKNUM[NUM] -- (External) token number corresponding to the
+   (internal) symbol number NUM (which must be that of a token).  */
 static const yytype_uint16 yytoknum[] =
 {
        0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
      265,   266,   267,   268,   269,   270,   271,   272,   273,   274,
      275,   276,   277,   278,   279,   280,   281,   282,   283,   284,
-     285,   286,   287,   288,   289,   290,   291,   292,   293,   294
+     285,   286,   287,   288,   289,   290,   291,   292,   293,   294,
+     295
 };
 # endif
 
-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
-static const yytype_uint8 yyr1[] =
+#define YYPACT_NINF -92
+
+#define yypact_value_is_default(Yystate) \
+  (!!((Yystate) == (-92)))
+
+#define YYTABLE_NINF -88
+
+#define yytable_value_is_error(Yytable_value) \
+  0
+
+  /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+     STATE-NUM.  */
+static const yytype_int16 yypact[] =
 {
-       0,    40,    41,    41,    42,    42,    43,    43,    43,    43,
-      43,    43,    43,    43,    44,    44,    44,    44,    44,    44,
-      44,    44,    45,    45,    45,    45,    45,    45,    46,    46,
-      47,    48,    49,    50,    51,    51,    51,    51,    51,    51,
-      51,    52,    52,    52,    52,    52,    53,    54,    54,    55,
-      55,    56,    57,    58,    59,    60,    60,    60,    60,    60,
-      60,    61,    61,    61,    61,    62,    62,    63,    64,    65,
-      66,    66,    66,    66,    67,    68,    69,    70,    71,    72,
-      72,    72,    72,    73,    74,    75,    76,    77,    78,    78,
-      78,    78,    79,    80,    80,    80,    81,    82,    82,    83,
-      83,    84,    84,    84,    85,    85,    86,    86,    87,    87,
-      87,    87,    87,    87,    87,    87,    87,    87,    87,    88,
-      88,    89,    89
+      17,    41,   -92,    15,   -92,   150,   -92,    19,   -92,   -92,
+     -13,   -92,    28,    41,    38,    41,    50,    47,    41,    79,
+      82,    44,    76,   -92,   -92,   -92,   -92,   -92,   -92,   -92,
+     -92,   -92,   118,   -92,   129,   -92,   -92,   -92,   -92,   -92,
+     -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,
+     -92,   -92,   184,   -92,   -92,   107,   -92,   111,   -92,   113,
+     -92,   116,   -92,   139,   140,   151,   -92,   -92,    44,    44,
+     142,   256,   -92,   160,   173,    27,   117,    80,    51,   255,
+     -15,   255,   217,   -92,   -92,   -92,   -92,   -92,   -92,    -8,
+     -92,    44,    44,   107,    87,    87,    87,    87,    87,    87,
+     -92,   -92,   174,   176,   187,    41,    41,    44,   188,   189,
+      87,   -92,   213,   -92,   -92,   -92,   -92,   206,   -92,   -92,
+     193,    41,    41,   203,   -92,   -92,   -92,   -92,   -92,   -92,
+     -92,   -92,   -92,   -92,   -92,   -92,   -92,   229,   -92,   241,
+     -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,
+     216,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,
+      44,   229,   222,   229,    64,   229,   229,    87,    31,   231,
+     -92,   -92,   229,   236,   229,    44,   -92,   145,   242,   -92,
+     -92,   243,   244,   245,   229,   251,   -92,   -92,   247,   -92,
+     257,   125,   -92,   -92,   -92,   -92,   -92,   260,    41,   -92,
+     -92,   -92,   -92,   -92
 };
 
-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
-static const yytype_uint8 yyr2[] =
+  /* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
+     Performed when YYTABLE does not specify something else to do.  Zero
+     means the default is an error.  */
+static const yytype_uint8 yydefact[] =
 {
-       0,     2,     2,     1,     2,     1,     0,     2,     2,     2,
-       2,     4,     4,     3,     1,     1,     1,     1,     1,     1,
-       1,     1,     1,     1,     1,     1,     1,     1,     3,     2,
-       3,     2,     3,     2,     0,     2,     2,     2,     2,     2,
-       2,     3,     4,     4,     4,     5,     3,     0,     3,     0,
-       2,     3,     2,     1,     3,     0,     2,     2,     2,     2,
-       2,     4,     3,     2,     4,     0,     2,     3,     1,     3,
-       0,     2,     2,     2,     3,     3,     3,     1,     3,     0,
-       2,     2,     2,     3,     3,     2,     2,     2,     0,     2,
-       2,     2,     4,     0,     2,     2,     2,     0,     2,     1,
-       1,     2,     2,     2,     1,     2,     0,     2,     1,     3,
-       3,     3,     3,     3,     3,     3,     2,     3,     3,     1,
-       1,     0,     1
+       6,     0,   106,     0,     3,     0,     6,     6,   101,   102,
+       0,     1,     0,     0,     0,     0,   123,     0,     0,     0,
+       0,     0,     0,    14,    19,    15,    16,    21,    17,    18,
+      20,    22,     0,    23,     0,     7,    35,    26,    35,    27,
+      57,    67,     8,    72,    24,    95,    81,     9,    28,    90,
+      25,    10,     0,   107,     2,    76,    13,     0,   103,     0,
+     124,     0,   104,     0,     0,     0,   121,   122,     0,     0,
+       0,   110,   105,     0,     0,     0,     0,     0,     0,     0,
+      90,     0,     0,    77,    85,    53,    86,    31,    33,     0,
+     118,     0,     0,    69,     0,     0,     0,     0,     0,     0,
+      11,    12,     0,     0,     0,     0,    99,     0,     0,     0,
+       0,    49,     0,    41,    40,    36,    37,     0,    39,    38,
+       0,     0,    99,     0,    61,    62,    58,    60,    59,    68,
+      56,    55,    73,    75,    71,    74,    70,   108,    97,     0,
+      96,    82,    84,    80,    83,    79,    92,    93,    91,   117,
+     119,   120,   116,   111,   112,   113,   114,   115,    30,    88,
+       0,   108,     0,   108,   108,   108,   108,     0,     0,     0,
+      89,    65,   108,     0,   108,     0,    98,     0,     0,    42,
+     100,     0,     0,     0,   108,    51,    48,    29,     0,    64,
+       0,   109,    94,    43,    44,    45,    46,     0,     0,    50,
+      63,    66,    47,    52
 };
 
-/* YYDEFACT[STATE-NAME] -- Default reduction number in state STATE-NUM.
-   Performed when YYTABLE doesn't specify something else to do.  Zero
-   means the default is an error.  */
-static const yytype_uint8 yydefact[] =
+  /* YYPGOTO[NTERM-NUM].  */
+static const yytype_int16 yypgoto[] =
 {
-       6,     0,   104,     0,     3,     0,     6,     6,    99,   100,
-       0,     1,     0,     0,     0,     0,   121,     0,     0,     0,
-       0,     0,     0,    14,    18,    15,    16,    20,    17,    19,
-      21,     0,    22,     0,     7,    34,    25,    34,    26,    55,
-      65,     8,    70,    23,    93,    79,     9,    27,    88,    24,
-      10,     0,   105,     2,    74,    13,     0,   101,     0,   122,
-       0,   102,     0,     0,     0,   119,   120,     0,     0,     0,
-     108,   103,     0,     0,     0,     0,     0,     0,     0,    88,
-       0,     0,    75,    83,    51,    84,    30,    32,     0,   116,
-       0,     0,    67,     0,     0,     0,     0,     0,     0,    11,
-      12,     0,     0,     0,     0,    97,     0,     0,     0,    47,
-       0,    40,    39,    35,    36,     0,    38,    37,     0,     0,
-      97,     0,    59,    60,    56,    58,    57,    66,    54,    53,
-      71,    73,    69,    72,    68,   106,    95,     0,    94,    80,
-      82,    78,    81,    77,    90,    91,    89,   115,   117,   118,
-     114,   109,   110,   111,   112,   113,    29,    86,     0,   106,
-       0,   106,   106,   106,     0,     0,     0,    87,    63,   106,
-       0,   106,     0,    96,     0,     0,    41,    98,     0,     0,
-     106,    49,    46,    28,     0,    62,     0,   107,    92,    42,
-      43,    44,     0,     0,    48,    61,    64,    45,    50
+     -92,   -92,   285,   291,   -92,    32,   -66,   -92,   -92,   -92,
+     -92,   261,   -92,   -92,   -92,   -92,   -92,   -92,   -92,     1,
+     -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,   -92,
+     -92,    24,   -92,   -92,   -92,   -92,   -92,   221,   220,   -64,
+     -92,   -92,   179,    -1,    67,     0,   110,   -67,   -91,   -92
 };
 
-/* YYDEFGOTO[NTERM-NUM].  */
+  /* YYDEFGOTO[NTERM-NUM].  */
 static const yytype_int16 yydefgoto[] =
 {
-      -1,     3,     4,     5,    33,    34,   112,    35,    36,    37,
-      38,    74,   113,   114,   165,   194,    39,    40,   128,    41,
-      76,   124,    77,    42,   132,    43,    78,     6,    44,    45,
-     141,    46,    80,    47,    48,    49,   115,   116,    81,   117,
-      79,   138,   160,   161,    50,     7,   173,    69,    70,    60
+      -1,     3,     4,     5,    34,    35,   114,    36,    37,    38,
+      39,    75,   115,   116,   168,   199,    40,    41,   130,    42,
+      77,   126,    78,    43,   134,    44,    79,     6,    45,    46,
+     143,    47,    81,    48,    49,    50,   117,   118,    82,   119,
+      80,   140,   162,   163,    51,     7,   176,    70,    71,    61
 };
 
-/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
-   STATE-NUM.  */
-#define YYPACT_NINF -91
-static const yytype_int16 yypact[] =
+  /* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM.  If
+     positive, shift that token.  If negative, reduce the rule whose
+     number is the opposite.  If YYTABLE_NINF, syntax error.  */
+static const yytype_int16 yytable[] =
 {
-      19,    37,   -91,    13,   -91,    79,   -91,    20,   -91,   -91,
-     -16,   -91,    21,    37,    25,    37,    41,    36,    37,    78,
-      83,    31,    56,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
-     -91,   116,   -91,   127,   -91,   -91,   -91,   -91,   -91,   -91,
-     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
-     -91,   147,   -91,   -91,   105,   -91,   109,   -91,   111,   -91,
-     114,   -91,   136,   137,   142,   -91,   -91,    31,    31,    76,
-     254,   -91,   143,   146,    27,   115,   207,   258,   243,   -14,
-     243,   179,   -91,   -91,   -91,   -91,   -91,   -91,    -7,   -91,
-      31,    31,   105,    51,    51,    51,    51,    51,    51,   -91,
-     -91,   156,   168,   181,    37,    37,    31,   178,    51,   -91,
-     206,   -91,   -91,   -91,   -91,   196,   -91,   -91,   175,    37,
-      37,   185,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
-     -91,   -91,   -91,   -91,   -91,   214,   -91,   230,   -91,   -91,
-     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   183,   -91,
-     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,    31,   214,
-     194,   214,    45,   214,    51,    26,   195,   -91,   -91,   214,
-     197,   214,    31,   -91,   139,   208,   -91,   -91,   220,   224,
-     214,   222,   -91,   -91,   226,   -91,   227,   123,   -91,   -91,
-     -91,   -91,   235,    37,   -91,   -91,   -91,   -91,   -91
+      10,    89,    90,   152,   153,   154,   155,   156,   157,   137,
+      55,   125,    57,   128,    59,    11,   147,    63,   148,   167,
+       1,   138,     1,     2,   150,   151,   149,   -32,   102,    91,
+      92,   -32,   -32,   -32,   -32,   -32,   -32,   -32,   -32,   103,
+     164,   -32,   -32,   104,   -32,   105,   106,   107,   108,   109,
+     110,   -32,   111,     2,   112,    53,    14,    15,   185,    17,
+      18,    19,    20,   113,    56,    21,    22,   186,     8,     9,
+      93,    66,    67,   147,    58,   148,   184,    60,   175,    68,
+     133,   102,   142,    62,    69,   -54,   -54,    33,   -54,   -54,
+     -54,   -54,   103,   177,   -54,   -54,   104,   120,   121,   122,
+     123,    91,    92,   135,   161,   144,    64,   112,   191,    65,
+     129,   132,    72,   141,    66,    67,   124,   -34,   102,    73,
+     172,   -34,   -34,   -34,   -34,   -34,   -34,   -34,   -34,   103,
+      74,   -34,   -34,   104,   -34,   105,   106,   107,   108,   109,
+     110,   -34,   111,    53,   112,   131,   136,    83,   145,    84,
+      -5,    12,    85,   113,    13,    14,    15,    16,    17,    18,
+      19,    20,    91,    92,    21,    22,    23,    24,    25,    26,
+      27,    28,    29,    30,    31,    86,    87,    32,     2,    91,
+      92,   192,    91,    92,    -4,    12,    33,    88,    13,    14,
+      15,    16,    17,    18,    19,    20,   100,   203,    21,    22,
+      23,    24,    25,    26,    27,    28,    29,    30,    31,   101,
+     158,    32,   159,   160,   169,   165,   166,   -87,   102,   170,
+      33,   -87,   -87,   -87,   -87,   -87,   -87,   -87,   -87,   171,
+     174,   -87,   -87,   104,   -87,   -87,   -87,   -87,   -87,   -87,
+     -87,   -87,   102,   175,   112,   -78,   -78,   -78,   -78,   -78,
+     -78,   -78,   -78,   146,    92,   -78,   -78,   104,   179,    13,
+      14,    15,    16,    17,    18,    19,    20,   187,   112,    21,
+      22,   178,   189,   180,   181,   182,   183,   146,   193,   194,
+     195,   196,   188,   200,   190,    94,    95,    96,    97,    98,
+     198,    33,    54,   201,   197,    99,   202,    52,   127,    76,
+     139,   173
 };
 
-/* YYPGOTO[NTERM-NUM].  */
-static const yytype_int16 yypgoto[] =
+static const yytype_uint8 yycheck[] =
 {
-     -91,   -91,   264,   268,   -91,    30,   -65,   -91,   -91,   -91,
-     -91,   238,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -12,
-     -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,   -91,
-     -91,    -5,   -91,   -91,   -91,   -91,   -91,   200,   209,   -61,
-     -91,   -91,   170,    -1,    65,     0,   118,   -66,   -90,   -91
+       1,    68,    69,    94,    95,    96,    97,    98,    99,    24,
+      10,    77,    13,    77,    15,     0,    82,    18,    82,   110,
+       3,    36,     3,    36,    91,    92,    34,     0,     1,    37,
+      38,     4,     5,     6,     7,     8,     9,    10,    11,    12,
+     107,    14,    15,    16,    17,    18,    19,    20,    21,    22,
+      23,    24,    25,    36,    27,    36,     5,     6,    27,     8,
+       9,    10,    11,    36,    36,    14,    15,    36,    27,    28,
+      70,    27,    28,   139,    36,   139,   167,    27,    14,    35,
+      79,     1,    81,    36,    40,     5,     6,    36,     8,     9,
+      10,    11,    12,   160,    14,    15,    16,    17,    18,    19,
+      20,    37,    38,    79,   105,    81,    27,    27,   175,    27,
+      78,    79,    36,    81,    27,    28,    36,     0,     1,     1,
+     121,     4,     5,     6,     7,     8,     9,    10,    11,    12,
+       1,    14,    15,    16,    17,    18,    19,    20,    21,    22,
+      23,    24,    25,    36,    27,    78,    79,    36,    81,    36,
+       0,     1,    36,    36,     4,     5,     6,     7,     8,     9,
+      10,    11,    37,    38,    14,    15,    16,    17,    18,    19,
+      20,    21,    22,    23,    24,    36,    36,    27,    36,    37,
+      38,    36,    37,    38,     0,     1,    36,    36,     4,     5,
+       6,     7,     8,     9,    10,    11,    36,   198,    14,    15,
+      16,    17,    18,    19,    20,    21,    22,    23,    24,    36,
+      36,    27,    36,    26,     1,    27,    27,     0,     1,    13,
+      36,     4,     5,     6,     7,     8,     9,    10,    11,    36,
+      27,    14,    15,    16,    17,    18,    19,    20,    21,    22,
+      23,    24,     1,    14,    27,     4,     5,     6,     7,     8,
+       9,    10,    11,    36,    38,    14,    15,    16,    36,     4,
+       5,     6,     7,     8,     9,    10,    11,    36,    27,    14,
+      15,   161,    36,   163,   164,   165,   166,    36,    36,    36,
+      36,    36,   172,    36,   174,    29,    30,    31,    32,    33,
+      39,    36,     7,    36,   184,    39,    36,     6,    77,    38,
+      80,   122
 };
 
-/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
-   positive, shift that token.  If negative, reduce the rule which
-   number is the opposite.  If YYTABLE_NINF, syntax error.  */
-#define YYTABLE_NINF -86
-static const yytype_int16 yytable[] =
+  /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
+     symbol of state STATE-NUM.  */
+static const yytype_uint8 yystos[] =
 {
-      10,    88,    89,   150,   151,   152,   153,   154,   155,   135,
-      54,   123,    56,    11,    58,   126,   145,    62,   164,     2,
-     146,   136,     1,     1,   148,   149,   147,   -31,   101,    90,
-      91,   -31,   -31,   -31,   -31,   -31,   -31,   -31,   -31,   102,
-     162,   -31,   -31,   103,   -31,   104,   105,   106,   107,   108,
-     -31,   109,   181,   110,     2,    52,    55,    65,    66,   172,
-      57,   182,   111,     8,     9,    67,   131,    59,   140,    92,
-      68,    61,   145,   133,   180,   142,   146,    65,    66,    -5,
-      12,    90,    91,    13,    14,    15,    16,    17,    18,    19,
-      20,    71,   174,    21,    22,    23,    24,    25,    26,    27,
-      28,    29,    30,   159,    63,    31,   187,   127,   130,    64,
-     139,     2,    90,    91,    32,   -33,   101,    72,   169,   -33,
-     -33,   -33,   -33,   -33,   -33,   -33,   -33,   102,    73,   -33,
-     -33,   103,   -33,   104,   105,   106,   107,   108,   -33,   109,
-      52,   110,   129,   134,    82,   143,    83,    -4,    12,    84,
-     111,    13,    14,    15,    16,    17,    18,    19,    20,    90,
-      91,    21,    22,    23,    24,    25,    26,    27,    28,    29,
-      30,    85,    86,    31,   188,    90,    91,    87,    99,   -85,
-     101,   100,    32,   -85,   -85,   -85,   -85,   -85,   -85,   -85,
-     -85,   156,   198,   -85,   -85,   103,   -85,   -85,   -85,   -85,
-     -85,   -85,   -85,   157,   163,   110,   158,   166,   101,   167,
-     168,   171,   -52,   -52,   144,   -52,   -52,   -52,   -52,   102,
-      91,   -52,   -52,   103,   118,   119,   120,   121,   172,   176,
-     183,   101,   185,   110,   -76,   -76,   -76,   -76,   -76,   -76,
-     -76,   -76,   122,   189,   -76,   -76,   103,    13,    14,    15,
-      16,    17,    18,    19,    20,   190,   110,    21,    22,   191,
-     193,   195,   196,    14,    15,   144,    17,    18,    19,    20,
-     197,    53,    21,    22,    51,    75,   125,   175,    32,   177,
-     178,   179,    93,    94,    95,    96,    97,   184,   137,   186,
-     170,     0,    98,    32,     0,     0,     0,     0,   192
+       0,     3,    36,    42,    43,    44,    68,    86,    27,    28,
+      84,     0,     1,     4,     5,     6,     7,     8,     9,    10,
+      11,    14,    15,    16,    17,    18,    19,    20,    21,    22,
+      23,    24,    27,    36,    45,    46,    48,    49,    50,    51,
+      57,    58,    60,    64,    66,    69,    70,    72,    74,    75,
+      76,    85,    44,    36,    43,    86,    36,    84,    36,    84,
+      27,    90,    36,    84,    27,    27,    27,    28,    35,    40,
+      88,    89,    36,     1,     1,    52,    52,    61,    63,    67,
+      81,    73,    79,    36,    36,    36,    36,    36,    36,    88,
+      88,    37,    38,    86,    29,    30,    31,    32,    33,    39,
+      36,    36,     1,    12,    16,    18,    19,    20,    21,    22,
+      23,    25,    27,    36,    47,    53,    54,    77,    78,    80,
+      17,    18,    19,    20,    36,    47,    62,    78,    80,    46,
+      59,    85,    46,    60,    65,    72,    85,    24,    36,    79,
+      82,    46,    60,    71,    72,    85,    36,    47,    80,    34,
+      88,    88,    89,    89,    89,    89,    89,    89,    36,    36,
+      26,    84,    83,    84,    88,    27,    27,    89,    55,     1,
+      13,    36,    84,    83,    27,    14,    87,    88,    87,    36,
+      87,    87,    87,    87,    89,    27,    36,    36,    87,    36,
+      87,    88,    36,    36,    36,    36,    36,    87,    39,    56,
+      36,    36,    36,    84
 };
 
-#define yypact_value_is_default(yystate) \
-  ((yystate) == (-91))
-
-#define yytable_value_is_error(yytable_value) \
-  YYID (0)
-
-static const yytype_int16 yycheck[] =
+  /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+static const yytype_uint8 yyr1[] =
 {
-       1,    67,    68,    93,    94,    95,    96,    97,    98,    23,
-      10,    76,    13,     0,    15,    76,    81,    18,   108,    35,
-      81,    35,     3,     3,    90,    91,    33,     0,     1,    36,
-      37,     4,     5,     6,     7,     8,     9,    10,    11,    12,
-     106,    14,    15,    16,    17,    18,    19,    20,    21,    22,
-      23,    24,    26,    26,    35,    35,    35,    26,    27,    14,
-      35,    35,    35,    26,    27,    34,    78,    26,    80,    69,
-      39,    35,   137,    78,   164,    80,   137,    26,    27,     0,
-       1,    36,    37,     4,     5,     6,     7,     8,     9,    10,
-      11,    35,   158,    14,    15,    16,    17,    18,    19,    20,
-      21,    22,    23,   104,    26,    26,   172,    77,    78,    26,
-      80,    35,    36,    37,    35,     0,     1,     1,   119,     4,
-       5,     6,     7,     8,     9,    10,    11,    12,     1,    14,
-      15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
-      35,    26,    77,    78,    35,    80,    35,     0,     1,    35,
-      35,     4,     5,     6,     7,     8,     9,    10,    11,    36,
-      37,    14,    15,    16,    17,    18,    19,    20,    21,    22,
-      23,    35,    35,    26,    35,    36,    37,    35,    35,     0,
-       1,    35,    35,     4,     5,     6,     7,     8,     9,    10,
-      11,    35,   193,    14,    15,    16,    17,    18,    19,    20,
-      21,    22,    23,    35,    26,    26,    25,     1,     1,    13,
-      35,    26,     5,     6,    35,     8,     9,    10,    11,    12,
-      37,    14,    15,    16,    17,    18,    19,    20,    14,    35,
-      35,     1,    35,    26,     4,     5,     6,     7,     8,     9,
-      10,    11,    35,    35,    14,    15,    16,     4,     5,     6,
-       7,     8,     9,    10,    11,    35,    26,    14,    15,    35,
-      38,    35,    35,     5,     6,    35,     8,     9,    10,    11,
-      35,     7,    14,    15,     6,    37,    76,   159,    35,   161,
-     162,   163,    28,    29,    30,    31,    32,   169,    79,   171,
-     120,    -1,    38,    35,    -1,    -1,    -1,    -1,   180
+       0,    41,    42,    42,    43,    43,    44,    44,    44,    44,
+      44,    44,    44,    44,    45,    45,    45,    45,    45,    45,
+      45,    45,    45,    46,    46,    46,    46,    46,    46,    47,
+      47,    48,    49,    50,    51,    52,    52,    52,    52,    52,
+      52,    52,    53,    53,    53,    53,    53,    53,    54,    55,
+      55,    56,    56,    57,    58,    59,    60,    61,    61,    61,
+      61,    61,    61,    62,    62,    62,    62,    63,    63,    64,
+      65,    66,    67,    67,    67,    67,    68,    69,    70,    71,
+      72,    73,    73,    73,    73,    74,    75,    76,    77,    78,
+      79,    79,    79,    79,    80,    81,    81,    81,    82,    83,
+      83,    84,    84,    85,    85,    85,    86,    86,    87,    87,
+      88,    88,    88,    88,    88,    88,    88,    88,    88,    88,
+      88,    89,    89,    90,    90
 };
 
-/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
-   symbol of state STATE-NUM.  */
-static const yytype_uint8 yystos[] =
+  /* YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.  */
+static const yytype_uint8 yyr2[] =
 {
-       0,     3,    35,    41,    42,    43,    67,    85,    26,    27,
-      83,     0,     1,     4,     5,     6,     7,     8,     9,    10,
-      11,    14,    15,    16,    17,    18,    19,    20,    21,    22,
-      23,    26,    35,    44,    45,    47,    48,    49,    50,    56,
-      57,    59,    63,    65,    68,    69,    71,    73,    74,    75,
-      84,    43,    35,    42,    85,    35,    83,    35,    83,    26,
-      89,    35,    83,    26,    26,    26,    27,    34,    39,    87,
-      88,    35,     1,     1,    51,    51,    60,    62,    66,    80,
-      72,    78,    35,    35,    35,    35,    35,    35,    87,    87,
-      36,    37,    85,    28,    29,    30,    31,    32,    38,    35,
-      35,     1,    12,    16,    18,    19,    20,    21,    22,    24,
-      26,    35,    46,    52,    53,    76,    77,    79,    17,    18,
-      19,    20,    35,    46,    61,    77,    79,    45,    58,    84,
-      45,    59,    64,    71,    84,    23,    35,    78,    81,    45,
-      59,    70,    71,    84,    35,    46,    79,    33,    87,    87,
-      88,    88,    88,    88,    88,    88,    35,    35,    25,    83,
-      82,    83,    87,    26,    88,    54,     1,    13,    35,    83,
-      82,    26,    14,    86,    87,    86,    35,    86,    86,    86,
-      88,    26,    35,    35,    86,    35,    86,    87,    35,    35,
-      35,    35,    86,    38,    55,    35,    35,    35,    83
+       0,     2,     2,     1,     2,     1,     0,     2,     2,     2,
+       2,     4,     4,     3,     1,     1,     1,     1,     1,     1,
+       1,     1,     1,     1,     1,     1,     1,     1,     1,     3,
+       2,     3,     2,     3,     2,     0,     2,     2,     2,     2,
+       2,     2,     3,     4,     4,     4,     4,     5,     3,     0,
+       3,     0,     2,     3,     2,     1,     3,     0,     2,     2,
+       2,     2,     2,     4,     3,     2,     4,     0,     2,     3,
+       1,     3,     0,     2,     2,     2,     3,     3,     3,     1,
+       3,     0,     2,     2,     2,     3,     3,     2,     2,     2,
+       0,     2,     2,     2,     4,     0,     2,     2,     2,     0,
+       2,     1,     1,     2,     2,     2,     1,     2,     0,     2,
+       1,     3,     3,     3,     3,     3,     3,     3,     2,     3,
+       3,     1,     1,     0,     1
 };
 
-#define yyerrok		(yyerrstatus = 0)
-#define yyclearin	(yychar = YYEMPTY)
-#define YYEMPTY		(-2)
-#define YYEOF		0
-
-#define YYACCEPT	goto yyacceptlab
-#define YYABORT		goto yyabortlab
-#define YYERROR		goto yyerrorlab
-
-
-/* Like YYERROR except do call yyerror.  This remains here temporarily
-   to ease the transition to the new meaning of YYERROR, for GCC.
-   Once GCC version 2 has supplanted version 1, this can go.  However,
-   YYFAIL appears to be in use.  Nevertheless, it is formally deprecated
-   in Bison 2.4.2's NEWS entry, where a plan to phase it out is
-   discussed.  */
-
-#define YYFAIL		goto yyerrlab
-#if defined YYFAIL
-  /* This is here to suppress warnings from the GCC cpp's
-     -Wunused-macros.  Normally we don't worry about that warning, but
-     some users do, and we want to make it easy for users to remove
-     YYFAIL uses, which will produce warnings from Bison 2.5.  */
-#endif
+
+#define yyerrok         (yyerrstatus = 0)
+#define yyclearin       (yychar = YYEMPTY)
+#define YYEMPTY         (-2)
+#define YYEOF           0
+
+#define YYACCEPT        goto yyacceptlab
+#define YYABORT         goto yyabortlab
+#define YYERROR         goto yyerrorlab
+
 
 #define YYRECOVERING()  (!!yyerrstatus)
 
@@ -855,55 +815,15 @@  do                                                              \
   else                                                          \
     {                                                           \
       yyerror (YY_("syntax error: cannot back up")); \
-      YYERROR;							\
-    }								\
-while (YYID (0))
-
-
-#define YYTERROR	1
-#define YYERRCODE	256
-
-
-/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
-   If N is 0, then set CURRENT to the empty location which ends
-   the previous symbol: RHS[0] (always defined).  */
-
-#define YYRHSLOC(Rhs, K) ((Rhs)[K])
-#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)				\
-    do									\
-      if (YYID (N))                                                    \
-	{								\
-	  (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;	\
-	  (Current).first_column = YYRHSLOC (Rhs, 1).first_column;	\
-	  (Current).last_line    = YYRHSLOC (Rhs, N).last_line;		\
-	  (Current).last_column  = YYRHSLOC (Rhs, N).last_column;	\
-	}								\
-      else								\
-	{								\
-	  (Current).first_line   = (Current).last_line   =		\
-	    YYRHSLOC (Rhs, 0).last_line;				\
-	  (Current).first_column = (Current).last_column =		\
-	    YYRHSLOC (Rhs, 0).last_column;				\
-	}								\
-    while (YYID (0))
-#endif
-
-
-/* This macro is provided for backward compatibility. */
-
-#ifndef YY_LOCATION_PRINT
-# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
-#endif
+      YYERROR;                                                  \
+    }                                                           \
+while (0)
 
+/* Error token number */
+#define YYTERROR        1
+#define YYERRCODE       256
 
-/* YYLEX -- calling `yylex' with the right arguments.  */
 
-#ifdef YYLEX_PARAM
-# define YYLEX yylex (YYLEX_PARAM)
-#else
-# define YYLEX yylex ()
-#endif
 
 /* Enable debugging if requested.  */
 #if YYDEBUG
@@ -913,40 +833,36 @@  while (YYID (0))
 #  define YYFPRINTF fprintf
 # endif
 
-# define YYDPRINTF(Args)			\
-do {						\
-  if (yydebug)					\
-    YYFPRINTF Args;				\
-} while (YYID (0))
+# define YYDPRINTF(Args)                        \
+do {                                            \
+  if (yydebug)                                  \
+    YYFPRINTF Args;                             \
+} while (0)
+
+/* This macro is provided for backward compatibility. */
+#ifndef YY_LOCATION_PRINT
+# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
+#endif
+
 
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location)			  \
-do {									  \
-  if (yydebug)								  \
-    {									  \
-      YYFPRINTF (stderr, "%s ", Title);					  \
-      yy_symbol_print (stderr,						  \
-		  Type, Value); \
-      YYFPRINTF (stderr, "\n");						  \
-    }									  \
-} while (YYID (0))
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
+do {                                                                      \
+  if (yydebug)                                                            \
+    {                                                                     \
+      YYFPRINTF (stderr, "%s ", Title);                                   \
+      yy_symbol_print (stderr,                                            \
+                  Type, Value); \
+      YYFPRINTF (stderr, "\n");                                           \
+    }                                                                     \
+} while (0)
 
 
-/*--------------------------------.
-| Print this symbol on YYOUTPUT.  |
-`--------------------------------*/
+/*----------------------------------------.
+| Print this symbol's value on YYOUTPUT.  |
+`----------------------------------------*/
 
-/*ARGSUSED*/
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
 yy_symbol_value_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep)
-#else
-static void
-yy_symbol_value_print (yyoutput, yytype, yyvaluep)
-    FILE *yyoutput;
-    int yytype;
-    YYSTYPE const * const yyvaluep;
-#endif
 {
   FILE *yyo = yyoutput;
   YYUSE (yyo);
@@ -955,14 +871,8 @@  yy_symbol_value_print (yyoutput, yytype, yyvaluep)
 # ifdef YYPRINT
   if (yytype < YYNTOKENS)
     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
-# else
-  YYUSE (yyoutput);
 # endif
-  switch (yytype)
-    {
-      default:
-	break;
-    }
+  YYUSE (yytype);
 }
 
 
@@ -970,22 +880,11 @@  yy_symbol_value_print (yyoutput, yytype, yyvaluep)
 | Print this symbol on YYOUTPUT.  |
 `--------------------------------*/
 
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
 yy_symbol_print (FILE *yyoutput, int yytype, YYSTYPE const * const yyvaluep)
-#else
-static void
-yy_symbol_print (yyoutput, yytype, yyvaluep)
-    FILE *yyoutput;
-    int yytype;
-    YYSTYPE const * const yyvaluep;
-#endif
 {
-  if (yytype < YYNTOKENS)
-    YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
-  else
-    YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
+  YYFPRINTF (yyoutput, "%s %s (",
+             yytype < YYNTOKENS ? "token" : "nterm", yytname[yytype]);
 
   yy_symbol_value_print (yyoutput, yytype, yyvaluep);
   YYFPRINTF (yyoutput, ")");
@@ -996,16 +895,8 @@  yy_symbol_print (yyoutput, yytype, yyvaluep)
 | TOP (included).                                                   |
 `------------------------------------------------------------------*/
 
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
 yy_stack_print (yytype_int16 *yybottom, yytype_int16 *yytop)
-#else
-static void
-yy_stack_print (yybottom, yytop)
-    yytype_int16 *yybottom;
-    yytype_int16 *yytop;
-#endif
 {
   YYFPRINTF (stderr, "Stack now");
   for (; yybottom <= yytop; yybottom++)
@@ -1016,49 +907,42 @@  yy_stack_print (yybottom, yytop)
   YYFPRINTF (stderr, "\n");
 }
 
-# define YY_STACK_PRINT(Bottom, Top)				\
-do {								\
-  if (yydebug)							\
-    yy_stack_print ((Bottom), (Top));				\
-} while (YYID (0))
+# define YY_STACK_PRINT(Bottom, Top)                            \
+do {                                                            \
+  if (yydebug)                                                  \
+    yy_stack_print ((Bottom), (Top));                           \
+} while (0)
 
 
 /*------------------------------------------------.
 | Report that the YYRULE is going to be reduced.  |
 `------------------------------------------------*/
 
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
-yy_reduce_print (YYSTYPE *yyvsp, int yyrule)
-#else
-static void
-yy_reduce_print (yyvsp, yyrule)
-    YYSTYPE *yyvsp;
-    int yyrule;
-#endif
+yy_reduce_print (yytype_int16 *yyssp, YYSTYPE *yyvsp, int yyrule)
 {
+  unsigned long int yylno = yyrline[yyrule];
   int yynrhs = yyr2[yyrule];
   int yyi;
-  unsigned long int yylno = yyrline[yyrule];
   YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
-	     yyrule - 1, yylno);
+             yyrule - 1, yylno);
   /* The symbols being reduced.  */
   for (yyi = 0; yyi < yynrhs; yyi++)
     {
       YYFPRINTF (stderr, "   $%d = ", yyi + 1);
-      yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
-		       &(yyvsp[(yyi + 1) - (yynrhs)])
-		       		       );
+      yy_symbol_print (stderr,
+                       yystos[yyssp[yyi + 1 - yynrhs]],
+                       &(yyvsp[(yyi + 1) - (yynrhs)])
+                                              );
       YYFPRINTF (stderr, "\n");
     }
 }
 
-# define YY_REDUCE_PRINT(Rule)		\
-do {					\
-  if (yydebug)				\
-    yy_reduce_print (yyvsp, Rule); \
-} while (YYID (0))
+# define YY_REDUCE_PRINT(Rule)          \
+do {                                    \
+  if (yydebug)                          \
+    yy_reduce_print (yyssp, yyvsp, Rule); \
+} while (0)
 
 /* Nonzero means print parse trace.  It is left uninitialized so that
    multiple parsers can coexist.  */
@@ -1072,7 +956,7 @@  int yydebug;
 
 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
-#ifndef	YYINITDEPTH
+#ifndef YYINITDEPTH
 # define YYINITDEPTH 200
 #endif
 
@@ -1095,15 +979,8 @@  int yydebug;
 #   define yystrlen strlen
 #  else
 /* Return the length of YYSTR.  */
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static YYSIZE_T
 yystrlen (const char *yystr)
-#else
-static YYSIZE_T
-yystrlen (yystr)
-    const char *yystr;
-#endif
 {
   YYSIZE_T yylen;
   for (yylen = 0; yystr[yylen]; yylen++)
@@ -1119,16 +996,8 @@  yystrlen (yystr)
 #  else
 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
    YYDEST.  */
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static char *
 yystpcpy (char *yydest, const char *yysrc)
-#else
-static char *
-yystpcpy (yydest, yysrc)
-    char *yydest;
-    const char *yysrc;
-#endif
 {
   char *yyd = yydest;
   const char *yys = yysrc;
@@ -1158,27 +1027,27 @@  yytnamerr (char *yyres, const char *yystr)
       char const *yyp = yystr;
 
       for (;;)
-	switch (*++yyp)
-	  {
-	  case '\'':
-	  case ',':
-	    goto do_not_strip_quotes;
-
-	  case '\\':
-	    if (*++yyp != '\\')
-	      goto do_not_strip_quotes;
-	    /* Fall through.  */
-	  default:
-	    if (yyres)
-	      yyres[yyn] = *yyp;
-	    yyn++;
-	    break;
-
-	  case '"':
-	    if (yyres)
-	      yyres[yyn] = '\0';
-	    return yyn;
-	  }
+        switch (*++yyp)
+          {
+          case '\'':
+          case ',':
+            goto do_not_strip_quotes;
+
+          case '\\':
+            if (*++yyp != '\\')
+              goto do_not_strip_quotes;
+            /* Fall through.  */
+          default:
+            if (yyres)
+              yyres[yyn] = *yyp;
+            yyn++;
+            break;
+
+          case '"':
+            if (yyres)
+              yyres[yyn] = '\0';
+            return yyn;
+          }
     do_not_strip_quotes: ;
     }
 
@@ -1201,12 +1070,11 @@  static int
 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                 yytype_int16 *yyssp, int yytoken)
 {
-  YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
+  YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
   YYSIZE_T yysize = yysize0;
-  YYSIZE_T yysize1;
   enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
   /* Internationalized format string. */
-  const char *yyformat = YY_NULL;
+  const char *yyformat = YY_NULLPTR;
   /* Arguments of yyformat. */
   char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
   /* Number of reported tokens (one for the "unexpected", one per
@@ -1214,10 +1082,6 @@  yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
   int yycount = 0;
 
   /* There are many possibilities here to consider:
-     - Assume YYFAIL is not used.  It's too flawed to consider.  See
-       <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
-       for details.  YYERROR is fine as it does not invoke this
-       function.
      - If this state is a consistent state with a default action, then
        the only way this function was invoked is if the default action
        is an error action.  In that case, don't check for expected
@@ -1266,11 +1130,13 @@  yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                     break;
                   }
                 yyarg[yycount++] = yytname[yyx];
-                yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
-                if (! (yysize <= yysize1
-                       && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
-                  return 2;
-                yysize = yysize1;
+                {
+                  YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
+                  if (! (yysize <= yysize1
+                         && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+                    return 2;
+                  yysize = yysize1;
+                }
               }
         }
     }
@@ -1290,10 +1156,12 @@  yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
 # undef YYCASE_
     }
 
-  yysize1 = yysize + yystrlen (yyformat);
-  if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
-    return 2;
-  yysize = yysize1;
+  {
+    YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
+    if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+      return 2;
+    yysize = yysize1;
+  }
 
   if (*yymsg_alloc < yysize)
     {
@@ -1330,78 +1198,58 @@  yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
 | Release the memory associated to this symbol.  |
 `-----------------------------------------------*/
 
-/*ARGSUSED*/
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 static void
 yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep)
-#else
-static void
-yydestruct (yymsg, yytype, yyvaluep)
-    const char *yymsg;
-    int yytype;
-    YYSTYPE *yyvaluep;
-#endif
 {
   YYUSE (yyvaluep);
-
   if (!yymsg)
     yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
   switch (yytype)
     {
-      case 57: /* "choice_entry" */
+          case 58: /* choice_entry  */
 
-	{
+      {
 	fprintf(stderr, "%s:%d: missing end statement for this entry\n",
-		(yyvaluep->menu)->file->name, (yyvaluep->menu)->lineno);
-	if (current_menu == (yyvaluep->menu))
+		((*yyvaluep).menu)->file->name, ((*yyvaluep).menu)->lineno);
+	if (current_menu == ((*yyvaluep).menu))
 		menu_end_menu();
-};
+}
+
+        break;
 
-	break;
-      case 63: /* "if_entry" */
+    case 64: /* if_entry  */
 
-	{
+      {
 	fprintf(stderr, "%s:%d: missing end statement for this entry\n",
-		(yyvaluep->menu)->file->name, (yyvaluep->menu)->lineno);
-	if (current_menu == (yyvaluep->menu))
+		((*yyvaluep).menu)->file->name, ((*yyvaluep).menu)->lineno);
+	if (current_menu == ((*yyvaluep).menu))
 		menu_end_menu();
-};
+}
 
-	break;
-      case 69: /* "menu_entry" */
+        break;
 
-	{
+    case 70: /* menu_entry  */
+
+      {
 	fprintf(stderr, "%s:%d: missing end statement for this entry\n",
-		(yyvaluep->menu)->file->name, (yyvaluep->menu)->lineno);
-	if (current_menu == (yyvaluep->menu))
+		((*yyvaluep).menu)->file->name, ((*yyvaluep).menu)->lineno);
+	if (current_menu == ((*yyvaluep).menu))
 		menu_end_menu();
-};
+}
+
+        break;
 
-	break;
 
       default:
-	break;
+        break;
     }
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
 }
 
 
-/* Prevent warnings from -Wmissing-prototypes.  */
-#ifdef YYPARSE_PARAM
-#if defined __STDC__ || defined __cplusplus
-int yyparse (void *YYPARSE_PARAM);
-#else
-int yyparse ();
-#endif
-#else /* ! YYPARSE_PARAM */
-#if defined __STDC__ || defined __cplusplus
-int yyparse (void);
-#else
-int yyparse ();
-#endif
-#endif /* ! YYPARSE_PARAM */
 
 
 /* The lookahead symbol.  */
@@ -1409,7 +1257,6 @@  int yychar;
 
 /* The semantic value of the lookahead symbol.  */
 YYSTYPE yylval;
-
 /* Number of syntax errors so far.  */
 int yynerrs;
 
@@ -1418,35 +1265,16 @@  int yynerrs;
 | yyparse.  |
 `----------*/
 
-#ifdef YYPARSE_PARAM
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-int
-yyparse (void *YYPARSE_PARAM)
-#else
-int
-yyparse (YYPARSE_PARAM)
-    void *YYPARSE_PARAM;
-#endif
-#else /* ! YYPARSE_PARAM */
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
 int
 yyparse (void)
-#else
-int
-yyparse ()
-
-#endif
-#endif
 {
     int yystate;
     /* Number of tokens to shift before error messages enabled.  */
     int yyerrstatus;
 
     /* The stacks and their tools:
-       `yyss': related to states.
-       `yyvs': related to semantic values.
+       'yyss': related to states.
+       'yyvs': related to semantic values.
 
        Refer to the stacks through separate pointers, to allow yyoverflow
        to reallocate them elsewhere.  */
@@ -1466,7 +1294,7 @@  yyparse ()
   int yyn;
   int yyresult;
   /* Lookahead token as an internal (translated) token number.  */
-  int yytoken;
+  int yytoken = 0;
   /* The variables used to return semantic value and location from the
      action routines.  */
   YYSTYPE yyval;
@@ -1484,9 +1312,8 @@  yyparse ()
      Keep to zero when no symbol should be popped.  */
   int yylen = 0;
 
-  yytoken = 0;
-  yyss = yyssa;
-  yyvs = yyvsa;
+  yyssp = yyss = yyssa;
+  yyvsp = yyvs = yyvsa;
   yystacksize = YYINITDEPTH;
 
   YYDPRINTF ((stderr, "Starting parse\n"));
@@ -1495,14 +1322,6 @@  yyparse ()
   yyerrstatus = 0;
   yynerrs = 0;
   yychar = YYEMPTY; /* Cause a token to be read.  */
-
-  /* Initialize stack pointers.
-     Waste one element of value and location stack
-     so that they stay on the same level as the state stack.
-     The wasted elements are never initialized.  */
-  yyssp = yyss;
-  yyvsp = yyvs;
-
   goto yysetstate;
 
 /*------------------------------------------------------------.
@@ -1523,23 +1342,23 @@  yyparse ()
 
 #ifdef yyoverflow
       {
-	/* Give user a chance to reallocate the stack.  Use copies of
-	   these so that the &'s don't force the real ones into
-	   memory.  */
-	YYSTYPE *yyvs1 = yyvs;
-	yytype_int16 *yyss1 = yyss;
-
-	/* Each stack pointer address is followed by the size of the
-	   data in use in that stack, in bytes.  This used to be a
-	   conditional around just the two extra args, but that might
-	   be undefined if yyoverflow is a macro.  */
-	yyoverflow (YY_("memory exhausted"),
-		    &yyss1, yysize * sizeof (*yyssp),
-		    &yyvs1, yysize * sizeof (*yyvsp),
-		    &yystacksize);
-
-	yyss = yyss1;
-	yyvs = yyvs1;
+        /* Give user a chance to reallocate the stack.  Use copies of
+           these so that the &'s don't force the real ones into
+           memory.  */
+        YYSTYPE *yyvs1 = yyvs;
+        yytype_int16 *yyss1 = yyss;
+
+        /* Each stack pointer address is followed by the size of the
+           data in use in that stack, in bytes.  This used to be a
+           conditional around just the two extra args, but that might
+           be undefined if yyoverflow is a macro.  */
+        yyoverflow (YY_("memory exhausted"),
+                    &yyss1, yysize * sizeof (*yyssp),
+                    &yyvs1, yysize * sizeof (*yyvsp),
+                    &yystacksize);
+
+        yyss = yyss1;
+        yyvs = yyvs1;
       }
 #else /* no yyoverflow */
 # ifndef YYSTACK_RELOCATE
@@ -1547,22 +1366,22 @@  yyparse ()
 # else
       /* Extend the stack our own way.  */
       if (YYMAXDEPTH <= yystacksize)
-	goto yyexhaustedlab;
+        goto yyexhaustedlab;
       yystacksize *= 2;
       if (YYMAXDEPTH < yystacksize)
-	yystacksize = YYMAXDEPTH;
+        yystacksize = YYMAXDEPTH;
 
       {
-	yytype_int16 *yyss1 = yyss;
-	union yyalloc *yyptr =
-	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
-	if (! yyptr)
-	  goto yyexhaustedlab;
-	YYSTACK_RELOCATE (yyss_alloc, yyss);
-	YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+        yytype_int16 *yyss1 = yyss;
+        union yyalloc *yyptr =
+          (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
+        if (! yyptr)
+          goto yyexhaustedlab;
+        YYSTACK_RELOCATE (yyss_alloc, yyss);
+        YYSTACK_RELOCATE (yyvs_alloc, yyvs);
 #  undef YYSTACK_RELOCATE
-	if (yyss1 != yyssa)
-	  YYSTACK_FREE (yyss1);
+        if (yyss1 != yyssa)
+          YYSTACK_FREE (yyss1);
       }
 # endif
 #endif /* no yyoverflow */
@@ -1571,10 +1390,10 @@  yyparse ()
       yyvsp = yyvs + yysize - 1;
 
       YYDPRINTF ((stderr, "Stack size increased to %lu\n",
-		  (unsigned long int) yystacksize));
+                  (unsigned long int) yystacksize));
 
       if (yyss + yystacksize - 1 <= yyssp)
-	YYABORT;
+        YYABORT;
     }
 
   YYDPRINTF ((stderr, "Entering state %d\n", yystate));
@@ -1603,7 +1422,7 @@  yybackup:
   if (yychar == YYEMPTY)
     {
       YYDPRINTF ((stderr, "Reading a token: "));
-      yychar = YYLEX;
+      yychar = yylex ();
     }
 
   if (yychar <= YYEOF)
@@ -1643,7 +1462,9 @@  yybackup:
   yychar = YYEMPTY;
 
   yystate = yyn;
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
   *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
 
   goto yynewstate;
 
@@ -1666,7 +1487,7 @@  yyreduce:
   yylen = yyr2[yyn];
 
   /* If YYLEN is nonzero, implement the default value of the action:
-     `$$ = $1'.
+     '$$ = $1'.
 
      Otherwise, the following line sets YYVAL to garbage.
      This behavior is undocumented and Bison
@@ -1682,64 +1503,73 @@  yyreduce:
         case 10:
 
     { zconf_error("unexpected end statement"); }
+
     break;
 
   case 11:
 
-    { zconf_error("unknown statement \"%s\"", (yyvsp[(2) - (4)].string)); }
+    { zconf_error("unknown statement \"%s\"", (yyvsp[-2].string)); }
+
     break;
 
   case 12:
 
     {
-	zconf_error("unexpected option \"%s\"", kconf_id_strings + (yyvsp[(2) - (4)].id)->name);
+	zconf_error("unexpected option \"%s\"", kconf_id_strings + (yyvsp[-2].id)->name);
 }
+
     break;
 
   case 13:
 
     { zconf_error("invalid statement"); }
+
     break;
 
-  case 28:
+  case 29:
+
+    { zconf_error("unknown option \"%s\"", (yyvsp[-2].string)); }
 
-    { zconf_error("unknown option \"%s\"", (yyvsp[(1) - (3)].string)); }
     break;
 
-  case 29:
+  case 30:
 
     { zconf_error("invalid option"); }
+
     break;
 
-  case 30:
+  case 31:
 
     {
-	struct symbol *sym = sym_lookup((yyvsp[(2) - (3)].string), 0);
+	struct symbol *sym = sym_lookup((yyvsp[-1].string), 0);
 	sym->flags |= SYMBOL_OPTIONAL;
 	menu_add_entry(sym);
-	printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), (yyvsp[(2) - (3)].string));
+	printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), (yyvsp[-1].string));
 }
+
     break;
 
-  case 31:
+  case 32:
 
     {
 	menu_end_entry();
 	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 32:
+  case 33:
 
     {
-	struct symbol *sym = sym_lookup((yyvsp[(2) - (3)].string), 0);
+	struct symbol *sym = sym_lookup((yyvsp[-1].string), 0);
 	sym->flags |= SYMBOL_OPTIONAL;
 	menu_add_entry(sym);
-	printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), (yyvsp[(2) - (3)].string));
+	printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), (yyvsp[-1].string));
 }
+
     break;
 
-  case 33:
+  case 34:
 
     {
 	if (current_entry->prompt)
@@ -1749,352 +1579,410 @@  yyreduce:
 	menu_end_entry();
 	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 41:
+  case 42:
 
     {
-	menu_set_type((yyvsp[(1) - (3)].id)->stype);
+	menu_set_type((yyvsp[-2].id)->stype);
 	printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 		zconf_curname(), zconf_lineno(),
-		(yyvsp[(1) - (3)].id)->stype);
+		(yyvsp[-2].id)->stype);
 }
+
     break;
 
-  case 42:
+  case 43:
 
     {
-	menu_add_prompt(P_PROMPT, (yyvsp[(2) - (4)].string), (yyvsp[(3) - (4)].expr));
+	menu_add_prompt(P_PROMPT, (yyvsp[-2].string), (yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 43:
+  case 44:
 
     {
-	menu_add_expr(P_DEFAULT, (yyvsp[(2) - (4)].expr), (yyvsp[(3) - (4)].expr));
-	if ((yyvsp[(1) - (4)].id)->stype != S_UNKNOWN)
-		menu_set_type((yyvsp[(1) - (4)].id)->stype);
+	menu_add_expr(P_DEFAULT, (yyvsp[-2].expr), (yyvsp[-1].expr));
+	if ((yyvsp[-3].id)->stype != S_UNKNOWN)
+		menu_set_type((yyvsp[-3].id)->stype);
 	printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
 		zconf_curname(), zconf_lineno(),
-		(yyvsp[(1) - (4)].id)->stype);
+		(yyvsp[-3].id)->stype);
 }
+
     break;
 
-  case 44:
+  case 45:
 
     {
-	menu_add_symbol(P_SELECT, sym_lookup((yyvsp[(2) - (4)].string), 0), (yyvsp[(3) - (4)].expr));
+	menu_add_symbol(P_SELECT, sym_lookup((yyvsp[-2].string), 0), (yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 45:
+  case 46:
 
     {
-	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,(yyvsp[(2) - (5)].symbol), (yyvsp[(3) - (5)].symbol)), (yyvsp[(4) - (5)].expr));
+	menu_add_symbol(P_IMPLY, sym_lookup((yyvsp[-2].string), 0), (yyvsp[-1].expr));
+	printd(DEBUG_PARSE, "%s:%d:imply\n", zconf_curname(), zconf_lineno());
+}
+
+    break;
+
+  case 47:
+
+    {
+	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,(yyvsp[-3].symbol), (yyvsp[-2].symbol)), (yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 48:
+  case 50:
 
     {
-	const struct kconf_id *id = kconf_id_lookup((yyvsp[(2) - (3)].string), strlen((yyvsp[(2) - (3)].string)));
+	const struct kconf_id *id = kconf_id_lookup((yyvsp[-1].string), strlen((yyvsp[-1].string)));
 	if (id && id->flags & TF_OPTION)
-		menu_add_option(id->token, (yyvsp[(3) - (3)].string));
+		menu_add_option(id->token, (yyvsp[0].string));
 	else
-		zconfprint("warning: ignoring unknown option %s", (yyvsp[(2) - (3)].string));
-	free((yyvsp[(2) - (3)].string));
+		zconfprint("warning: ignoring unknown option %s", (yyvsp[-1].string));
+	free((yyvsp[-1].string));
 }
+
     break;
 
-  case 49:
+  case 51:
 
     { (yyval.string) = NULL; }
+
     break;
 
-  case 50:
+  case 52:
+
+    { (yyval.string) = (yyvsp[0].string); }
 
-    { (yyval.string) = (yyvsp[(2) - (2)].string); }
     break;
 
-  case 51:
+  case 53:
 
     {
-	struct symbol *sym = sym_lookup((yyvsp[(2) - (3)].string), SYMBOL_CHOICE);
+	struct symbol *sym = sym_lookup((yyvsp[-1].string), SYMBOL_CHOICE);
 	sym->flags |= SYMBOL_AUTO;
 	menu_add_entry(sym);
 	menu_add_expr(P_CHOICE, NULL, NULL);
 	printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 52:
+  case 54:
 
     {
 	(yyval.menu) = menu_add_menu();
 }
+
     break;
 
-  case 53:
+  case 55:
 
     {
-	if (zconf_endtoken((yyvsp[(1) - (1)].id), T_CHOICE, T_ENDCHOICE)) {
+	if (zconf_endtoken((yyvsp[0].id), T_CHOICE, T_ENDCHOICE)) {
 		menu_end_menu();
 		printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
 	}
 }
+
     break;
 
-  case 61:
+  case 63:
 
     {
-	menu_add_prompt(P_PROMPT, (yyvsp[(2) - (4)].string), (yyvsp[(3) - (4)].expr));
+	menu_add_prompt(P_PROMPT, (yyvsp[-2].string), (yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 62:
+  case 64:
 
     {
-	if ((yyvsp[(1) - (3)].id)->stype == S_BOOLEAN || (yyvsp[(1) - (3)].id)->stype == S_TRISTATE) {
-		menu_set_type((yyvsp[(1) - (3)].id)->stype);
+	if ((yyvsp[-2].id)->stype == S_BOOLEAN || (yyvsp[-2].id)->stype == S_TRISTATE) {
+		menu_set_type((yyvsp[-2].id)->stype);
 		printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 			zconf_curname(), zconf_lineno(),
-			(yyvsp[(1) - (3)].id)->stype);
+			(yyvsp[-2].id)->stype);
 	} else
 		YYERROR;
 }
+
     break;
 
-  case 63:
+  case 65:
 
     {
 	current_entry->sym->flags |= SYMBOL_OPTIONAL;
 	printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 64:
+  case 66:
 
     {
-	if ((yyvsp[(1) - (4)].id)->stype == S_UNKNOWN) {
-		menu_add_symbol(P_DEFAULT, sym_lookup((yyvsp[(2) - (4)].string), 0), (yyvsp[(3) - (4)].expr));
+	if ((yyvsp[-3].id)->stype == S_UNKNOWN) {
+		menu_add_symbol(P_DEFAULT, sym_lookup((yyvsp[-2].string), 0), (yyvsp[-1].expr));
 		printd(DEBUG_PARSE, "%s:%d:default\n",
 			zconf_curname(), zconf_lineno());
 	} else
 		YYERROR;
 }
+
     break;
 
-  case 67:
+  case 69:
 
     {
 	printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
 	menu_add_entry(NULL);
-	menu_add_dep((yyvsp[(2) - (3)].expr));
+	menu_add_dep((yyvsp[-1].expr));
 	(yyval.menu) = menu_add_menu();
 }
+
     break;
 
-  case 68:
+  case 70:
 
     {
-	if (zconf_endtoken((yyvsp[(1) - (1)].id), T_IF, T_ENDIF)) {
+	if (zconf_endtoken((yyvsp[0].id), T_IF, T_ENDIF)) {
 		menu_end_menu();
 		printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
 	}
 }
+
     break;
 
-  case 74:
+  case 76:
 
     {
-	menu_add_prompt(P_MENU, (yyvsp[(2) - (3)].string), NULL);
+	menu_add_prompt(P_MENU, (yyvsp[-1].string), NULL);
 }
+
     break;
 
-  case 75:
+  case 77:
 
     {
 	menu_add_entry(NULL);
-	menu_add_prompt(P_MENU, (yyvsp[(2) - (3)].string), NULL);
+	menu_add_prompt(P_MENU, (yyvsp[-1].string), NULL);
 	printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 76:
+  case 78:
 
     {
 	(yyval.menu) = menu_add_menu();
 }
+
     break;
 
-  case 77:
+  case 79:
 
     {
-	if (zconf_endtoken((yyvsp[(1) - (1)].id), T_MENU, T_ENDMENU)) {
+	if (zconf_endtoken((yyvsp[0].id), T_MENU, T_ENDMENU)) {
 		menu_end_menu();
 		printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
 	}
 }
+
     break;
 
-  case 83:
+  case 85:
 
     {
-	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), (yyvsp[(2) - (3)].string));
-	zconf_nextfile((yyvsp[(2) - (3)].string));
+	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), (yyvsp[-1].string));
+	zconf_nextfile((yyvsp[-1].string));
 }
+
     break;
 
-  case 84:
+  case 86:
 
     {
 	menu_add_entry(NULL);
-	menu_add_prompt(P_COMMENT, (yyvsp[(2) - (3)].string), NULL);
+	menu_add_prompt(P_COMMENT, (yyvsp[-1].string), NULL);
 	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 }
+
     break;
 
-  case 85:
+  case 87:
 
     {
 	menu_end_entry();
 }
+
     break;
 
-  case 86:
+  case 88:
 
     {
 	printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
 	zconf_starthelp();
 }
+
     break;
 
-  case 87:
+  case 89:
 
     {
-	current_entry->help = (yyvsp[(2) - (2)].string);
+	current_entry->help = (yyvsp[0].string);
 }
+
     break;
 
-  case 92:
+  case 94:
 
     {
-	menu_add_dep((yyvsp[(3) - (4)].expr));
+	menu_add_dep((yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
 }
-    break;
-
-  case 96:
 
-    {
-	menu_add_visibility((yyvsp[(2) - (2)].expr));
-}
     break;
 
   case 98:
 
     {
-	menu_add_prompt(P_PROMPT, (yyvsp[(1) - (2)].string), (yyvsp[(2) - (2)].expr));
+	menu_add_visibility((yyvsp[0].expr));
 }
-    break;
 
-  case 101:
-
-    { (yyval.id) = (yyvsp[(1) - (2)].id); }
     break;
 
-  case 102:
+  case 100:
+
+    {
+	menu_add_prompt(P_PROMPT, (yyvsp[-1].string), (yyvsp[0].expr));
+}
 
-    { (yyval.id) = (yyvsp[(1) - (2)].id); }
     break;
 
   case 103:
 
-    { (yyval.id) = (yyvsp[(1) - (2)].id); }
+    { (yyval.id) = (yyvsp[-1].id); }
+
     break;
 
-  case 106:
+  case 104:
+
+    { (yyval.id) = (yyvsp[-1].id); }
 
-    { (yyval.expr) = NULL; }
     break;
 
-  case 107:
+  case 105:
+
+    { (yyval.id) = (yyvsp[-1].id); }
 
-    { (yyval.expr) = (yyvsp[(2) - (2)].expr); }
     break;
 
   case 108:
 
-    { (yyval.expr) = expr_alloc_symbol((yyvsp[(1) - (1)].symbol)); }
+    { (yyval.expr) = NULL; }
+
     break;
 
   case 109:
 
-    { (yyval.expr) = expr_alloc_comp(E_LTH, (yyvsp[(1) - (3)].symbol), (yyvsp[(3) - (3)].symbol)); }
+    { (yyval.expr) = (yyvsp[0].expr); }
+
     break;
 
   case 110:
 
-    { (yyval.expr) = expr_alloc_comp(E_LEQ, (yyvsp[(1) - (3)].symbol), (yyvsp[(3) - (3)].symbol)); }
+    { (yyval.expr) = expr_alloc_symbol((yyvsp[0].symbol)); }
+
     break;
 
   case 111:
 
-    { (yyval.expr) = expr_alloc_comp(E_GTH, (yyvsp[(1) - (3)].symbol), (yyvsp[(3) - (3)].symbol)); }
+    { (yyval.expr) = expr_alloc_comp(E_LTH, (yyvsp[-2].symbol), (yyvsp[0].symbol)); }
+
     break;
 
   case 112:
 
-    { (yyval.expr) = expr_alloc_comp(E_GEQ, (yyvsp[(1) - (3)].symbol), (yyvsp[(3) - (3)].symbol)); }
+    { (yyval.expr) = expr_alloc_comp(E_LEQ, (yyvsp[-2].symbol), (yyvsp[0].symbol)); }
+
     break;
 
   case 113:
 
-    { (yyval.expr) = expr_alloc_comp(E_EQUAL, (yyvsp[(1) - (3)].symbol), (yyvsp[(3) - (3)].symbol)); }
+    { (yyval.expr) = expr_alloc_comp(E_GTH, (yyvsp[-2].symbol), (yyvsp[0].symbol)); }
+
     break;
 
   case 114:
 
-    { (yyval.expr) = expr_alloc_comp(E_UNEQUAL, (yyvsp[(1) - (3)].symbol), (yyvsp[(3) - (3)].symbol)); }
+    { (yyval.expr) = expr_alloc_comp(E_GEQ, (yyvsp[-2].symbol), (yyvsp[0].symbol)); }
+
     break;
 
   case 115:
 
-    { (yyval.expr) = (yyvsp[(2) - (3)].expr); }
+    { (yyval.expr) = expr_alloc_comp(E_EQUAL, (yyvsp[-2].symbol), (yyvsp[0].symbol)); }
+
     break;
 
   case 116:
 
-    { (yyval.expr) = expr_alloc_one(E_NOT, (yyvsp[(2) - (2)].expr)); }
+    { (yyval.expr) = expr_alloc_comp(E_UNEQUAL, (yyvsp[-2].symbol), (yyvsp[0].symbol)); }
+
     break;
 
   case 117:
 
-    { (yyval.expr) = expr_alloc_two(E_OR, (yyvsp[(1) - (3)].expr), (yyvsp[(3) - (3)].expr)); }
+    { (yyval.expr) = (yyvsp[-1].expr); }
+
     break;
 
   case 118:
 
-    { (yyval.expr) = expr_alloc_two(E_AND, (yyvsp[(1) - (3)].expr), (yyvsp[(3) - (3)].expr)); }
+    { (yyval.expr) = expr_alloc_one(E_NOT, (yyvsp[0].expr)); }
+
     break;
 
   case 119:
 
-    { (yyval.symbol) = sym_lookup((yyvsp[(1) - (1)].string), 0); free((yyvsp[(1) - (1)].string)); }
+    { (yyval.expr) = expr_alloc_two(E_OR, (yyvsp[-2].expr), (yyvsp[0].expr)); }
+
     break;
 
   case 120:
 
-    { (yyval.symbol) = sym_lookup((yyvsp[(1) - (1)].string), SYMBOL_CONST); free((yyvsp[(1) - (1)].string)); }
+    { (yyval.expr) = expr_alloc_two(E_AND, (yyvsp[-2].expr), (yyvsp[0].expr)); }
+
     break;
 
   case 121:
 
+    { (yyval.symbol) = sym_lookup((yyvsp[0].string), 0); free((yyvsp[0].string)); }
+
+    break;
+
+  case 122:
+
+    { (yyval.symbol) = sym_lookup((yyvsp[0].string), SYMBOL_CONST); free((yyvsp[0].string)); }
+
+    break;
+
+  case 123:
+
     { (yyval.string) = NULL; }
+
     break;
 
 
@@ -2120,7 +2008,7 @@  yyreduce:
 
   *++yyvsp = yyval;
 
-  /* Now `shift' the result of the reduction.  Determine what state
+  /* Now 'shift' the result of the reduction.  Determine what state
      that goes to, based on the state we popped back to and the rule
      number reduced by.  */
 
@@ -2135,9 +2023,9 @@  yyreduce:
   goto yynewstate;
 
 
-/*------------------------------------.
-| yyerrlab -- here on detecting error |
-`------------------------------------*/
+/*--------------------------------------.
+| yyerrlab -- here on detecting error.  |
+`--------------------------------------*/
 yyerrlab:
   /* Make sure we have latest lookahead translation.  See comments at
      user semantic actions for why this is necessary.  */
@@ -2188,20 +2076,20 @@  yyerrlab:
   if (yyerrstatus == 3)
     {
       /* If just tried and failed to reuse lookahead token after an
-	 error, discard it.  */
+         error, discard it.  */
 
       if (yychar <= YYEOF)
-	{
-	  /* Return failure if at end of input.  */
-	  if (yychar == YYEOF)
-	    YYABORT;
-	}
+        {
+          /* Return failure if at end of input.  */
+          if (yychar == YYEOF)
+            YYABORT;
+        }
       else
-	{
-	  yydestruct ("Error: discarding",
-		      yytoken, &yylval);
-	  yychar = YYEMPTY;
-	}
+        {
+          yydestruct ("Error: discarding",
+                      yytoken, &yylval);
+          yychar = YYEMPTY;
+        }
     }
 
   /* Else will try to reuse lookahead token after shifting the error
@@ -2220,7 +2108,7 @@  yyerrorlab:
   if (/*CONSTCOND*/ 0)
      goto yyerrorlab;
 
-  /* Do not reclaim the symbols of the rule which action triggered
+  /* Do not reclaim the symbols of the rule whose action triggered
      this YYERROR.  */
   YYPOPSTACK (yylen);
   yylen = 0;
@@ -2233,35 +2121,37 @@  yyerrorlab:
 | yyerrlab1 -- common code for both syntax error and YYERROR.  |
 `-------------------------------------------------------------*/
 yyerrlab1:
-  yyerrstatus = 3;	/* Each real token shifted decrements this.  */
+  yyerrstatus = 3;      /* Each real token shifted decrements this.  */
 
   for (;;)
     {
       yyn = yypact[yystate];
       if (!yypact_value_is_default (yyn))
-	{
-	  yyn += YYTERROR;
-	  if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
-	    {
-	      yyn = yytable[yyn];
-	      if (0 < yyn)
-		break;
-	    }
-	}
+        {
+          yyn += YYTERROR;
+          if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
+            {
+              yyn = yytable[yyn];
+              if (0 < yyn)
+                break;
+            }
+        }
 
       /* Pop the current state because it cannot handle the error token.  */
       if (yyssp == yyss)
-	YYABORT;
+        YYABORT;
 
 
       yydestruct ("Error: popping",
-		  yystos[yystate], yyvsp);
+                  yystos[yystate], yyvsp);
       YYPOPSTACK (1);
       yystate = *yyssp;
       YY_STACK_PRINT (yyss, yyssp);
     }
 
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
   *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
 
 
   /* Shift the error token.  */
@@ -2304,14 +2194,14 @@  yyreturn:
       yydestruct ("Cleanup: discarding lookahead",
                   yytoken, &yylval);
     }
-  /* Do not reclaim the symbols of the rule which action triggered
+  /* Do not reclaim the symbols of the rule whose action triggered
      this YYABORT or YYACCEPT.  */
   YYPOPSTACK (yylen);
   YY_STACK_PRINT (yyss, yyssp);
   while (yyssp != yyss)
     {
       yydestruct ("Cleanup: popping",
-		  yystos[*yyssp], yyvsp);
+                  yystos[*yyssp], yyvsp);
       YYPOPSTACK (1);
     }
 #ifndef yyoverflow
@@ -2322,14 +2212,11 @@  yyreturn:
   if (yymsg != yymsgbuf)
     YYSTACK_FREE (yymsg);
 #endif
-  /* Make sure YYID is used.  */
-  return YYID (yyresult);
+  return yyresult;
 }
 
 
 
-
-
 void conf_parse(const char *name)
 {
 	struct symbol *sym;
@@ -2501,6 +2388,11 @@  static void print_symbol(FILE *out, struct menu *menu)
 			expr_fprint(prop->expr, out);
 			fputc('\n', out);
 			break;
+		case P_IMPLY:
+			fputs( "  imply ", out);
+			expr_fprint(prop->expr, out);
+			fputc('\n', out);
+			break;
 		case P_RANGE:
 			fputs( "  range ", out);
 			expr_fprint(prop->expr, out);
@@ -2577,4 +2469,3 @@  void zconfdump(FILE *out)
 #include "expr.c"
 #include "symbol.c"
 #include "menu.c"
-