[PATCH] kconfig: use gperf for kconfig keywords

Use gperf to generate a hash for the kconfig keywords.  This greatly reduces
the size of the generated scanner and makes it easier to extend kconfig.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 261 insertions, 194 deletions

diff --git a/scripts/kconfig/zconf.tab.c_shipped b/scripts/kconfig/zconf.tab.c_shipped
index da12f7b33be3..07fa508d4659 100644
--- a/scripts/kconfig/zconf.tab.c_shipped
+++ b/scripts/kconfig/zconf.tab.c_shipped
@@ -1,7 +1,7 @@
-/* A Bison parser, made by GNU Bison 1.875a.  */
+/* A Bison parser, made by GNU Bison 2.0.  */
 
 /* Skeleton parser for Yacc-like parsing with Bison,
-   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004 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
@@ -45,8 +45,7 @@
 /* Using locations.  */
 #define YYLSP_NEEDED 0
 
-/* If NAME_PREFIX is specified substitute the variables and functions
-   names.  */
+/* Substitute the variable and function names.  */
 #define yyparse zconfparse
 #define yylex   zconflex
 #define yyerror zconferror
@@ -161,6 +160,11 @@
 #include <string.h>
 #include <stdbool.h>
 
+#define LKC_DIRECT_LINK
+#include "lkc.h"
+
+#include "zconf.hash.c"
+
 #define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
 
 #define PRINTD		0x0001
@@ -202,7 +206,7 @@ typedef union YYSTYPE {
 	struct expr *expr;
 	struct menu *menu;
 } YYSTYPE;
-/* Line 191 of yacc.c.  */
+/* Line 190 of yacc.c.  */
 
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
@@ -214,27 +218,26 @@ typedef union YYSTYPE {
 /* Copy the second part of user declarations.  */
 
 
-#define LKC_DIRECT_LINK
-#include "lkc.h"
-
-
-/* Line 214 of yacc.c.  */
+/* Line 213 of yacc.c.  */
 
 
 #if ! defined (yyoverflow) || YYERROR_VERBOSE
 
+# ifndef YYFREE
+#  define YYFREE free
+# endif
+# ifndef YYMALLOC
+#  define YYMALLOC malloc
+# endif
+
 /* The parser invokes alloca or malloc; define the necessary symbols.  */
 
-# if YYSTACK_USE_ALLOCA
-#  define YYSTACK_ALLOC alloca
-# else
-#  ifndef YYSTACK_USE_ALLOCA
-#   if defined (alloca) || defined (_ALLOCA_H)
-#    define YYSTACK_ALLOC alloca
+# ifdef YYSTACK_USE_ALLOCA
+#  if YYSTACK_USE_ALLOCA
+#   ifdef __GNUC__
+#    define YYSTACK_ALLOC __builtin_alloca
 #   else
-#    ifdef __GNUC__
-#     define YYSTACK_ALLOC __builtin_alloca
-#    endif
+#    define YYSTACK_ALLOC alloca
 #   endif
 #  endif
 # endif
@@ -247,20 +250,20 @@ typedef union YYSTYPE {
 #   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
 #   define YYSIZE_T size_t
 #  endif
-#  define YYSTACK_ALLOC malloc
-#  define YYSTACK_FREE free
+#  define YYSTACK_ALLOC YYMALLOC
+#  define YYSTACK_FREE YYFREE
 # endif
 #endif /* ! defined (yyoverflow) || YYERROR_VERBOSE */
 
 
 #if (! defined (yyoverflow) \
      && (! defined (__cplusplus) \
-	 || (YYSTYPE_IS_TRIVIAL)))
+	 || (defined (YYSTYPE_IS_TRIVIAL) && YYSTYPE_IS_TRIVIAL)))
 
 /* A type that is properly aligned for any stack member.  */
 union yyalloc
 {
-  short yyss;
+  short int yyss;
   YYSTYPE yyvs;
   };
 
@@ -270,13 +273,13 @@ union yyalloc
 /* The size of an array large to enough to hold all stacks, each with
    N elements.  */
 # define YYSTACK_BYTES(N) \
-     ((N) * (sizeof (short) + sizeof (YYSTYPE))				\
+     ((N) * (sizeof (short int) + sizeof (YYSTYPE))			\
       + YYSTACK_GAP_MAXIMUM)
 
 /* Copy COUNT objects from FROM to TO.  The source and destination do
    not overlap.  */
 # ifndef YYCOPY
-#  if 1 < __GNUC__
+#  if defined (__GNUC__) && 1 < __GNUC__
 #   define YYCOPY(To, From, Count) \
       __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
 #  else
@@ -312,7 +315,7 @@ union yyalloc
 #if defined (__STDC__) || defined (__cplusplus)
    typedef signed char yysigned_char;
 #else
-   typedef short yysigned_char;
+   typedef short int yysigned_char;
 #endif
 
 /* YYFINAL -- State number of the termination state. */
@@ -374,7 +377,7 @@ static const unsigned char yytranslate[] =
 #if YYDEBUG
 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
    YYRHS.  */
-static const unsigned short yyprhs[] =
+static const unsigned short int yyprhs[] =
 {
        0,     0,     3,     4,     7,     9,    11,    13,    17,    19,
       21,    23,    26,    28,    30,    32,    34,    36,    38,    42,
@@ -427,19 +430,19 @@ static const yysigned_char yyrhs[] =
 };
 
 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
-static const unsigned short yyrline[] =
+static const unsigned short int yyrline[] =
 {
-       0,    94,    94,    95,    98,    99,   100,   101,   102,   103,
-     104,   105,   109,   110,   111,   112,   113,   114,   120,   128,
-     134,   142,   152,   154,   155,   156,   157,   160,   166,   173,
-     179,   186,   192,   198,   204,   210,   216,   222,   230,   239,
-     245,   254,   255,   261,   263,   264,   265,   266,   269,   275,
-     281,   287,   293,   299,   301,   306,   315,   324,   325,   331,
-     333,   334,   335,   340,   347,   353,   362,   363,   369,   371,
-     372,   373,   374,   377,   383,   390,   397,   404,   410,   417,
-     418,   419,   422,   427,   432,   440,   442,   447,   448,   451,
-     452,   453,   457,   457,   459,   460,   463,   464,   465,   466,
-     467,   468,   469,   472,   473
+       0,    97,    97,    98,   101,   102,   103,   104,   105,   106,
+     107,   108,   112,   113,   114,   115,   116,   117,   123,   131,
+     137,   145,   155,   157,   158,   159,   160,   163,   169,   176,
+     182,   189,   195,   201,   207,   213,   219,   225,   233,   242,
+     248,   257,   258,   264,   266,   267,   268,   269,   272,   278,
+     284,   290,   296,   302,   304,   309,   318,   327,   328,   334,
+     336,   337,   338,   343,   350,   356,   365,   366,   372,   374,
+     375,   376,   377,   380,   386,   393,   400,   407,   413,   420,
+     421,   422,   425,   430,   435,   443,   445,   450,   451,   454,
+     455,   456,   460,   460,   462,   463,   466,   467,   468,   469,
+     470,   471,   472,   475,   476
 };
 #endif
 
@@ -448,29 +451,29 @@ static const unsigned short yyrline[] =
    First, the terminals, then, starting at YYNTOKENS, nonterminals. */
 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_REQUIRES", "T_OPTIONAL", "T_PROMPT", "T_DEFAULT", "T_TRISTATE", 
-  "T_DEF_TRISTATE", "T_BOOLEAN", "T_DEF_BOOLEAN", "T_STRING", "T_INT", 
-  "T_HEX", "T_WORD", "T_WORD_QUOTE", "T_UNEQUAL", "T_EOF", "T_EOL", 
-  "T_CLOSE_PAREN", "T_OPEN_PAREN", "T_ON", "T_SELECT", "T_RANGE", "T_OR", 
-  "T_AND", "T_EQUAL", "T_NOT", "$accept", "input", "block", 
-  "common_block", "config_entry_start", "config_stmt", 
-  "menuconfig_entry_start", "menuconfig_stmt", "config_option_list", 
-  "config_option", "choice", "choice_entry", "choice_end", "choice_stmt", 
-  "choice_option_list", "choice_option", "choice_block", "if", "if_end", 
-  "if_stmt", "if_block", "menu", "menu_entry", "menu_end", "menu_stmt", 
-  "menu_block", "source", "source_stmt", "comment", "comment_stmt", 
-  "help_start", "help", "depends_list", "depends", "prompt_stmt_opt", 
-  "prompt", "end", "nl_or_eof", "if_expr", "expr", "symbol", 0
+  "$end", "error", "$undefined", "T_MAINMENU", "T_MENU", "T_ENDMENU",
+  "T_SOURCE", "T_CHOICE", "T_ENDCHOICE", "T_COMMENT", "T_CONFIG",
+  "T_MENUCONFIG", "T_HELP", "T_HELPTEXT", "T_IF", "T_ENDIF", "T_DEPENDS",
+  "T_REQUIRES", "T_OPTIONAL", "T_PROMPT", "T_DEFAULT", "T_TRISTATE",
+  "T_DEF_TRISTATE", "T_BOOLEAN", "T_DEF_BOOLEAN", "T_STRING", "T_INT",
+  "T_HEX", "T_WORD", "T_WORD_QUOTE", "T_UNEQUAL", "T_EOF", "T_EOL",
+  "T_CLOSE_PAREN", "T_OPEN_PAREN", "T_ON", "T_SELECT", "T_RANGE", "T_OR",
+  "T_AND", "T_EQUAL", "T_NOT", "$accept", "input", "block", "common_block",
+  "config_entry_start", "config_stmt", "menuconfig_entry_start",
+  "menuconfig_stmt", "config_option_list", "config_option", "choice",
+  "choice_entry", "choice_end", "choice_stmt", "choice_option_list",
+  "choice_option", "choice_block", "if", "if_end", "if_stmt", "if_block",
+  "menu", "menu_entry", "menu_end", "menu_stmt", "menu_block", "source",
+  "source_stmt", "comment", "comment_stmt", "help_start", "help",
+  "depends_list", "depends", "prompt_stmt_opt", "prompt", "end",
+  "nl_or_eof", "if_expr", "expr", "symbol", 0
 };
 #endif
 
 # ifdef YYPRINT
 /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
    token YYLEX-NUM.  */
-static const unsigned short yytoknum[] =
+static const unsigned short int yytoknum[] =
 {
        0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
      265,   266,   267,   268,   269,   270,   271,   272,   273,   274,
@@ -539,7 +542,7 @@ static const unsigned char yydefact[] =
 };
 
 /* YYDEFGOTO[NTERM-NUM]. */
-static const short yydefgoto[] =
+static const short int yydefgoto[] =
 {
       -1,     1,    17,    18,    19,    20,    21,    22,    52,    88,
       23,    24,   105,    25,    54,    98,    55,    26,   109,    27,
@@ -551,7 +554,7 @@ static const short yydefgoto[] =
 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
    STATE-NUM.  */
 #define YYPACT_NINF -99
-static const short yypact[] =
+static const short int yypact[] =
 {
      -99,    48,   -99,    38,    46,    46,   -99,    46,   -29,   -99,
       46,   -17,    -3,   -11,   -99,   -99,   -99,   -99,   -99,   -99,
@@ -575,7 +578,7 @@ static const short yypact[] =
 };
 
 /* YYPGOTO[NTERM-NUM].  */
-static const short yypgoto[] =
+static const short int yypgoto[] =
 {
      -99,   -99,   -99,   111,   -99,   -99,   -99,   -99,   178,   -99,
      -99,   -99,   -99,    91,   -99,   -99,   -99,   -99,   -99,   -99,
@@ -589,7 +592,7 @@ static const short yypgoto[] =
    number is the opposite.  If zero, do what YYDEFACT says.
    If YYTABLE_NINF, syntax error.  */
 #define YYTABLE_NINF -68
-static const short yytable[] =
+static const short int yytable[] =
 {
       66,    67,    36,    42,    39,    40,    71,    41,   123,   124,
       43,    44,    74,    75,   120,   154,    72,    46,    47,    69,
@@ -687,7 +690,7 @@ static const unsigned char yystos[] =
 
 #define YYACCEPT	goto yyacceptlab
 #define YYABORT		goto yyabortlab
-#define YYERROR		goto yyerrlab1
+#define YYERROR		goto yyerrorlab
 
 
 /* Like YYERROR except do call yyerror.  This remains here temporarily
@@ -715,20 +718,53 @@ do								\
     }								\
 while (0)
 
+
 #define YYTERROR	1
 #define YYERRCODE	256
 
-/* YYLLOC_DEFAULT -- Compute the default location (before the actions
-   are run).  */
 
+/* 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)         \
-  Current.first_line   = Rhs[1].first_line;      \
-  Current.first_column = Rhs[1].first_column;    \
-  Current.last_line    = Rhs[N].last_line;       \
-  Current.last_column  = Rhs[N].last_column;
+# define YYLLOC_DEFAULT(Current, Rhs, N)				\
+    do									\
+      if (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 (0)
 #endif
 
+
+/* YY_LOCATION_PRINT -- Print the location on the stream.
+   This macro was not mandated originally: define only if we know
+   we won't break user code: when these are the locations we know.  */
+
+#ifndef YY_LOCATION_PRINT
+# if YYLTYPE_IS_TRIVIAL
+#  define YY_LOCATION_PRINT(File, Loc)			\
+     fprintf (File, "%d.%d-%d.%d",			\
+              (Loc).first_line, (Loc).first_column,	\
+              (Loc).last_line,  (Loc).last_column)
+# else
+#  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
+# endif
+#endif
+
+
 /* YYLEX -- calling `yylex' with the right arguments.  */
 
 #ifdef YYLEX_PARAM
@@ -751,36 +787,30 @@ do {						\
     YYFPRINTF Args;				\
 } while (0)
 
-# define YYDSYMPRINT(Args)			\
-do {						\
-  if (yydebug)					\
-    yysymprint Args;				\
-} while (0)
-
-# define YYDSYMPRINTF(Title, Token, Value, Location)		\
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)		\
 do {								\
   if (yydebug)							\
     {								\
       YYFPRINTF (stderr, "%s ", Title);				\
       yysymprint (stderr, 					\
-                  Token, Value);	\
+                  Type, Value);	\
       YYFPRINTF (stderr, "\n");					\
     }								\
 } while (0)
 
 /*------------------------------------------------------------------.
 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
-| TOP (cinluded).                                                   |
+| TOP (included).                                                   |
 `------------------------------------------------------------------*/
 
 #if defined (__STDC__) || defined (__cplusplus)
 static void
-yy_stack_print (short *bottom, short *top)
+yy_stack_print (short int *bottom, short int *top)
 #else
 static void
 yy_stack_print (bottom, top)
-    short *bottom;
-    short *top;
+    short int *bottom;
+    short int *top;
 #endif
 {
   YYFPRINTF (stderr, "Stack now");
@@ -810,9 +840,9 @@ yy_reduce_print (yyrule)
 #endif
 {
   int yyi;
-  unsigned int yylineno = yyrline[yyrule];
+  unsigned int yylno = yyrline[yyrule];
   YYFPRINTF (stderr, "Reducing stack by rule %d (line %u), ",
-             yyrule - 1, yylineno);
+             yyrule - 1, yylno);
   /* Print the symbols being reduced, and their result.  */
   for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++)
     YYFPRINTF (stderr, "%s ", yytname [yyrhs[yyi]]);
@@ -830,8 +860,7 @@ do {					\
 int yydebug;
 #else /* !YYDEBUG */
 # define YYDPRINTF(Args)
-# define YYDSYMPRINT(Args)
-# define YYDSYMPRINTF(Title, Token, Value, Location)
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
 # define YY_STACK_PRINT(Bottom, Top)
 # define YY_REDUCE_PRINT(Rule)
 #endif /* !YYDEBUG */
@@ -849,10 +878,6 @@ int yydebug;
    SIZE_MAX < YYSTACK_BYTES (YYMAXDEPTH)
    evaluated with infinite-precision integer arithmetic.  */
 
-#if YYMAXDEPTH == 0
-# undef YYMAXDEPTH
-#endif
-
 #ifndef YYMAXDEPTH
 # define YYMAXDEPTH 10000
 #endif
@@ -934,15 +959,15 @@ yysymprint (yyoutput, yytype, yyvaluep)
   (void) yyvaluep;
 
   if (yytype < YYNTOKENS)
-    {
-      YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
-# ifdef YYPRINT
-      YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
-# endif
-    }
+    YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
   else
     YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
 
+
+# ifdef YYPRINT
+  if (yytype < YYNTOKENS)
+    YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
+# endif
   switch (yytype)
     {
       default:
@@ -958,10 +983,11 @@ yysymprint (yyoutput, yytype, yyvaluep)
 
 #if defined (__STDC__) || defined (__cplusplus)
 static void
-yydestruct (int yytype, YYSTYPE *yyvaluep)
+yydestruct (const char *yymsg, int yytype, YYSTYPE *yyvaluep)
 #else
 static void
-yydestruct (yytype, yyvaluep)
+yydestruct (yymsg, yytype, yyvaluep)
+    const char *yymsg;
     int yytype;
     YYSTYPE *yyvaluep;
 #endif
@@ -969,6 +995,10 @@ yydestruct (yytype, yyvaluep)
   /* Pacify ``unused variable'' warnings.  */
   (void) yyvaluep;
 
+  if (!yymsg)
+    yymsg = "Deleting";
+  YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
+
   switch (yytype)
     {
 
@@ -996,10 +1026,10 @@ int yyparse ();
 
 
 
-/* The lookahead symbol.  */
+/* The look-ahead symbol.  */
 int yychar;
 
-/* The semantic value of the lookahead symbol.  */
+/* The semantic value of the look-ahead symbol.  */
 YYSTYPE yylval;
 
 /* Number of syntax errors so far.  */
@@ -1035,7 +1065,7 @@ yyparse ()
   int yyresult;
   /* Number of tokens to shift before error messages enabled.  */
   int yyerrstatus;
-  /* Lookahead token as an internal (translated) token number.  */
+  /* Look-ahead token as an internal (translated) token number.  */
   int yytoken = 0;
 
   /* Three stacks and their tools:
@@ -1047,9 +1077,9 @@ yyparse ()
      to reallocate them elsewhere.  */
 
   /* The state stack.  */
-  short	yyssa[YYINITDEPTH];
-  short *yyss = yyssa;
-  register short *yyssp;
+  short int yyssa[YYINITDEPTH];
+  short int *yyss = yyssa;
+  register short int *yyssp;
 
   /* The semantic value stack.  */
   YYSTYPE yyvsa[YYINITDEPTH];
@@ -1086,6 +1116,9 @@ yyparse ()
   yyssp = yyss;
   yyvsp = yyvs;
 
+
+  yyvsp[0] = yylval;
+
   goto yysetstate;
 
 /*------------------------------------------------------------.
@@ -1111,7 +1144,7 @@ yyparse ()
 	   these so that the &'s don't force the real ones into
 	   memory.  */
 	YYSTYPE *yyvs1 = yyvs;
-	short *yyss1 = yyss;
+	short int *yyss1 = yyss;
 
 
 	/* Each stack pointer address is followed by the size of the
@@ -1139,7 +1172,7 @@ yyparse ()
 	yystacksize = YYMAXDEPTH;
 
       {
-	short *yyss1 = yyss;
+	short int *yyss1 = yyss;
 	union yyalloc *yyptr =
 	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
 	if (! yyptr)
@@ -1175,18 +1208,18 @@ yyparse ()
 yybackup:
 
 /* Do appropriate processing given the current state.  */
-/* Read a lookahead token if we need one and don't already have one.  */
+/* Read a look-ahead token if we need one and don't already have one.  */
 /* yyresume: */
 
-  /* First try to decide what to do without reference to lookahead token.  */
+  /* First try to decide what to do without reference to look-ahead token.  */
 
   yyn = yypact[yystate];
   if (yyn == YYPACT_NINF)
     goto yydefault;
 
-  /* Not known => get a lookahead token if don't already have one.  */
+  /* Not known => get a look-ahead token if don't already have one.  */
 
-  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
+  /* YYCHAR is either YYEMPTY or YYEOF or a valid look-ahead symbol.  */
   if (yychar == YYEMPTY)
     {
       YYDPRINTF ((stderr, "Reading a token: "));
@@ -1201,7 +1234,7 @@ yybackup:
   else
     {
       yytoken = YYTRANSLATE (yychar);
-      YYDSYMPRINTF ("Next token is", yytoken, &yylval, &yylloc);
+      YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
     }
 
   /* If the proper action on seeing token YYTOKEN is to reduce or to
@@ -1221,8 +1254,8 @@ yybackup:
   if (yyn == YYFINAL)
     YYACCEPT;
 
-  /* Shift the lookahead token.  */
-  YYDPRINTF ((stderr, "Shifting token %s, ", yytname[yytoken]));
+  /* Shift the look-ahead token.  */
+  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
 
   /* Discard the token being shifted unless it is eof.  */
   if (yychar != YYEOF)
@@ -1294,10 +1327,10 @@ yyreduce:
   case 18:
 
     {
-	struct symbol *sym = sym_lookup(yyvsp[-1].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[-1].string);
+	printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), (yyvsp[-1].string));
 ;}
     break;
 
@@ -1312,10 +1345,10 @@ yyreduce:
   case 20:
 
     {
-	struct symbol *sym = sym_lookup(yyvsp[-1].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[-1].string);
+	printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), (yyvsp[-1].string));
 ;}
     break;
 
@@ -1342,7 +1375,7 @@ yyreduce:
   case 28:
 
     {
-	menu_add_expr(P_DEFAULT, yyvsp[-2].expr, yyvsp[-1].expr);
+	menu_add_expr(P_DEFAULT, (yyvsp[-2].expr), (yyvsp[-1].expr));
 	menu_set_type(S_TRISTATE);
 	printd(DEBUG_PARSE, "%s:%d:def_boolean\n", zconf_curname(), zconf_lineno());
 ;}
@@ -1359,7 +1392,7 @@ yyreduce:
   case 30:
 
     {
-	menu_add_expr(P_DEFAULT, yyvsp[-2].expr, yyvsp[-1].expr);
+	menu_add_expr(P_DEFAULT, (yyvsp[-2].expr), (yyvsp[-1].expr));
 	menu_set_type(S_BOOLEAN);
 	printd(DEBUG_PARSE, "%s:%d:def_boolean\n", zconf_curname(), zconf_lineno());
 ;}
@@ -1392,7 +1425,7 @@ yyreduce:
   case 34:
 
     {
-	menu_add_prompt(P_PROMPT, yyvsp[-2].string, yyvsp[-1].expr);
+	menu_add_prompt(P_PROMPT, (yyvsp[-2].string), (yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1400,7 +1433,7 @@ yyreduce:
   case 35:
 
     {
-	menu_add_expr(P_DEFAULT, yyvsp[-2].expr, yyvsp[-1].expr);
+	menu_add_expr(P_DEFAULT, (yyvsp[-2].expr), (yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:default\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1408,7 +1441,7 @@ yyreduce:
   case 36:
 
     {
-	menu_add_symbol(P_SELECT, sym_lookup(yyvsp[-2].string, 0), yyvsp[-1].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;
@@ -1416,7 +1449,7 @@ yyreduce:
   case 37:
 
     {
-	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,yyvsp[-3].symbol, yyvsp[-2].symbol), yyvsp[-1].expr);
+	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;
@@ -1443,7 +1476,7 @@ yyreduce:
   case 40:
 
     {
-	if (zconf_endtoken(yyvsp[0].token, T_CHOICE, T_ENDCHOICE)) {
+	if (zconf_endtoken((yyvsp[0].token), T_CHOICE, T_ENDCHOICE)) {
 		menu_end_menu();
 		printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
 	}
@@ -1461,7 +1494,7 @@ yyreduce:
   case 48:
 
     {
-	menu_add_prompt(P_PROMPT, yyvsp[-2].string, yyvsp[-1].expr);
+	menu_add_prompt(P_PROMPT, (yyvsp[-2].string), (yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1493,7 +1526,7 @@ yyreduce:
   case 52:
 
     {
-	menu_add_symbol(P_DEFAULT, sym_lookup(yyvsp[-2].string, 0), yyvsp[-1].expr);
+	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());
 ;}
     break;
@@ -1503,7 +1536,7 @@ yyreduce:
     {
 	printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
 	menu_add_entry(NULL);
-	menu_add_dep(yyvsp[-1].expr);
+	menu_add_dep((yyvsp[-1].expr));
 	menu_end_entry();
 	menu_add_menu();
 ;}
@@ -1512,7 +1545,7 @@ yyreduce:
   case 56:
 
     {
-	if (zconf_endtoken(yyvsp[0].token, T_IF, T_ENDIF)) {
+	if (zconf_endtoken((yyvsp[0].token), T_IF, T_ENDIF)) {
 		menu_end_menu();
 		printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
 	}
@@ -1531,7 +1564,7 @@ yyreduce:
 
     {
 	menu_add_entry(NULL);
-	menu_add_prompt(P_MENU, yyvsp[-1].string, NULL);
+	menu_add_prompt(P_MENU, (yyvsp[-1].string), NULL);
 	printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1547,7 +1580,7 @@ yyreduce:
   case 65:
 
     {
-	if (zconf_endtoken(yyvsp[0].token, T_MENU, T_ENDMENU)) {
+	if (zconf_endtoken((yyvsp[0].token), T_MENU, T_ENDMENU)) {
 		menu_end_menu();
 		printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
 	}
@@ -1570,15 +1603,15 @@ yyreduce:
   case 73:
 
     {
-	yyval.string = yyvsp[-1].string;
-	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), yyvsp[-1].string);
+	(yyval.string) = (yyvsp[-1].string);
+	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), (yyvsp[-1].string));
 ;}
     break;
 
   case 74:
 
     {
-	zconf_nextfile(yyvsp[0].string);
+	zconf_nextfile((yyvsp[0].string));
 ;}
     break;
 
@@ -1586,7 +1619,7 @@ yyreduce:
 
     {
 	menu_add_entry(NULL);
-	menu_add_prompt(P_COMMENT, yyvsp[-1].string, NULL);
+	menu_add_prompt(P_COMMENT, (yyvsp[-1].string), NULL);
 	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1609,14 +1642,14 @@ yyreduce:
   case 78:
 
     {
-	current_entry->sym->help = yyvsp[0].string;
+	current_entry->sym->help = (yyvsp[0].string);
 ;}
     break;
 
   case 82:
 
     {
-	menu_add_dep(yyvsp[-1].expr);
+	menu_add_dep((yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1624,7 +1657,7 @@ yyreduce:
   case 83:
 
     {
-	menu_add_dep(yyvsp[-1].expr);
+	menu_add_dep((yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:depends\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1632,7 +1665,7 @@ yyreduce:
   case 84:
 
     {
-	menu_add_dep(yyvsp[-1].expr);
+	menu_add_dep((yyvsp[-1].expr));
 	printd(DEBUG_PARSE, "%s:%d:requires\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1640,84 +1673,84 @@ yyreduce:
   case 86:
 
     {
-	menu_add_prompt(P_PROMPT, yyvsp[-1].string, yyvsp[0].expr);
+	menu_add_prompt(P_PROMPT, (yyvsp[-1].string), (yyvsp[0].expr));
 ;}
     break;
 
   case 89:
 
-    { yyval.token = T_ENDMENU; ;}
+    { (yyval.token) = T_ENDMENU; ;}
     break;
 
   case 90:
 
-    { yyval.token = T_ENDCHOICE; ;}
+    { (yyval.token) = T_ENDCHOICE; ;}
     break;
 
   case 91:
 
-    { yyval.token = T_ENDIF; ;}
+    { (yyval.token) = T_ENDIF; ;}
     break;
 
   case 94:
 
-    { yyval.expr = NULL; ;}
+    { (yyval.expr) = NULL; ;}
     break;
 
   case 95:
 
-    { yyval.expr = yyvsp[0].expr; ;}
+    { (yyval.expr) = (yyvsp[0].expr); ;}
     break;
 
   case 96:
 
-    { yyval.expr = expr_alloc_symbol(yyvsp[0].symbol); ;}
+    { (yyval.expr) = expr_alloc_symbol((yyvsp[0].symbol)); ;}
     break;
 
   case 97:
 
-    { yyval.expr = expr_alloc_comp(E_EQUAL, yyvsp[-2].symbol, yyvsp[0].symbol); ;}
+    { (yyval.expr) = expr_alloc_comp(E_EQUAL, (yyvsp[-2].symbol), (yyvsp[0].symbol)); ;}
     break;
 
   case 98:
 
-    { yyval.expr = expr_alloc_comp(E_UNEQUAL, yyvsp[-2].symbol, yyvsp[0].symbol); ;}
+    { (yyval.expr) = expr_alloc_comp(E_UNEQUAL, (yyvsp[-2].symbol), (yyvsp[0].symbol)); ;}
     break;
 
   case 99:
 
-    { yyval.expr = yyvsp[-1].expr; ;}
+    { (yyval.expr) = (yyvsp[-1].expr); ;}
     break;
 
   case 100:
 
-    { yyval.expr = expr_alloc_one(E_NOT, yyvsp[0].expr); ;}
+    { (yyval.expr) = expr_alloc_one(E_NOT, (yyvsp[0].expr)); ;}
     break;
 
   case 101:
 
-    { yyval.expr = expr_alloc_two(E_OR, yyvsp[-2].expr, yyvsp[0].expr); ;}
+    { (yyval.expr) = expr_alloc_two(E_OR, (yyvsp[-2].expr), (yyvsp[0].expr)); ;}
     break;
 
   case 102:
 
-    { yyval.expr = expr_alloc_two(E_AND, yyvsp[-2].expr, yyvsp[0].expr); ;}
+    { (yyval.expr) = expr_alloc_two(E_AND, (yyvsp[-2].expr), (yyvsp[0].expr)); ;}
     break;
 
   case 103:
 
-    { yyval.symbol = sym_lookup(yyvsp[0].string, 0); free(yyvsp[0].string); ;}
+    { (yyval.symbol) = sym_lookup((yyvsp[0].string), 0); free((yyvsp[0].string)); ;}
     break;
 
   case 104:
 
-    { yyval.symbol = sym_lookup(yyvsp[0].string, 1); free(yyvsp[0].string); ;}
+    { (yyval.symbol) = sym_lookup((yyvsp[0].string), 1); free((yyvsp[0].string)); ;}
     break;
 
 
     }
 
-/* Line 999 of yacc.c.  */
+/* Line 1037 of yacc.c.  */
 
 
   yyvsp -= yylen;
@@ -1759,18 +1792,33 @@ yyerrlab:
 	{
 	  YYSIZE_T yysize = 0;
 	  int yytype = YYTRANSLATE (yychar);
+	  const char* yyprefix;
 	  char *yymsg;
-	  int yyx, yycount;
+	  int yyx;
 
-	  yycount = 0;
 	  /* Start YYX at -YYN if negative to avoid negative indexes in
 	     YYCHECK.  */
-	  for (yyx = yyn < 0 ? -yyn : 0;
-	       yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
+	  int yyxbegin = yyn < 0 ? -yyn : 0;
+
+	  /* Stay within bounds of both yycheck and yytname.  */
+	  int yychecklim = YYLAST - yyn;
+	  int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
+	  int yycount = 0;
+
+	  yyprefix = ", expecting ";
+	  for (yyx = yyxbegin; yyx < yyxend; ++yyx)
 	    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
-	      yysize += yystrlen (yytname[yyx]) + 15, yycount++;
-	  yysize += yystrlen ("syntax error, unexpected ") + 1;
-	  yysize += yystrlen (yytname[yytype]);
+	      {
+		yysize += yystrlen (yyprefix) + yystrlen (yytname [yyx]);
+		yycount += 1;
+		if (yycount == 5)
+		  {
+		    yysize = 0;
+		    break;
+		  }
+	      }
+	  yysize += (sizeof ("syntax error, unexpected ")
+		     + yystrlen (yytname[yytype]));
 	  yymsg = (char *) YYSTACK_ALLOC (yysize);
 	  if (yymsg != 0)
 	    {
@@ -1779,16 +1827,13 @@ yyerrlab:
 
 	      if (yycount < 5)
 		{
-		  yycount = 0;
-		  for (yyx = yyn < 0 ? -yyn : 0;
-		       yyx < (int) (sizeof (yytname) / sizeof (char *));
-		       yyx++)
+		  yyprefix = ", expecting ";
+		  for (yyx = yyxbegin; yyx < yyxend; ++yyx)
 		    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
 		      {
-			const char *yyq = ! yycount ? ", expecting " : " or ";
-			yyp = yystpcpy (yyp, yyq);
+			yyp = yystpcpy (yyp, yyprefix);
 			yyp = yystpcpy (yyp, yytname[yyx]);
-			yycount++;
+			yyprefix = " or ";
 		      }
 		}
 	      yyerror (yymsg);
@@ -1806,38 +1851,57 @@ yyerrlab:
 
   if (yyerrstatus == 3)
     {
-      /* If just tried and failed to reuse lookahead token after an
+      /* If just tried and failed to reuse look-ahead token after an
 	 error, discard it.  */
 
-      /* Return failure if at end of input.  */
-      if (yychar == YYEOF)
+      if (yychar <= YYEOF)
         {
-	  /* Pop the error token.  */
-          YYPOPSTACK;
-	  /* Pop the rest of the stack.  */
-	  while (yyss < yyssp)
-	    {
-	      YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);
-	      yydestruct (yystos[*yyssp], yyvsp);
-	      YYPOPSTACK;
-	    }
-	  YYABORT;
+          /* If at end of input, pop the error token,
+	     then the rest of the stack, then return failure.  */
+	  if (yychar == YYEOF)
+	     for (;;)
+	       {
+
+		 YYPOPSTACK;
+		 if (yyssp == yyss)
+		   YYABORT;
+		 yydestruct ("Error: popping",
+                             yystos[*yyssp], yyvsp);
+	       }
         }
-
-      YYDSYMPRINTF ("Error: discarding", yytoken, &yylval, &yylloc);
-      yydestruct (yytoken, &yylval);
-      yychar = YYEMPTY;
-
+      else
+	{
+	  yydestruct ("Error: discarding", yytoken, &yylval);
+	  yychar = YYEMPTY;
+	}
     }
 
-  /* Else will try to reuse lookahead token after shifting the error
+  /* Else will try to reuse look-ahead token after shifting the error
      token.  */
   goto yyerrlab1;
 
 
-/*----------------------------------------------------.
-| yyerrlab1 -- error raised explicitly by an action.  |
-`----------------------------------------------------*/
+/*---------------------------------------------------.
+| yyerrorlab -- error raised explicitly by YYERROR.  |
+`---------------------------------------------------*/
+yyerrorlab:
+
+#ifdef __GNUC__
+  /* Pacify GCC when the user code never invokes YYERROR and the label
+     yyerrorlab therefore never appears in user code.  */
+  if (0)
+     goto yyerrorlab;
+#endif
+
+yyvsp -= yylen;
+  yyssp -= yylen;
+  yystate = *yyssp;
+  goto yyerrlab1;
+
+
+/*-------------------------------------------------------------.
+| yyerrlab1 -- common code for both syntax error and YYERROR.  |
+`-------------------------------------------------------------*/
 yyerrlab1:
   yyerrstatus = 3;	/* Each real token shifted decrements this.  */
 
@@ -1859,22 +1923,22 @@ yyerrlab1:
       if (yyssp == yyss)
 	YYABORT;
 
-      YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);
-      yydestruct (yystos[yystate], yyvsp);
-      yyvsp--;
-      yystate = *--yyssp;
 
+      yydestruct ("Error: popping", yystos[yystate], yyvsp);
+      YYPOPSTACK;
+      yystate = *yyssp;
       YY_STACK_PRINT (yyss, yyssp);
     }
 
   if (yyn == YYFINAL)
     YYACCEPT;
 
-  YYDPRINTF ((stderr, "Shifting error token, "));
-
   *++yyvsp = yylval;
 
 
+  /* Shift the error token. */
+  YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
+
   yystate = yyn;
   goto yynewstate;
 
@@ -1890,6 +1954,9 @@ yyacceptlab:
 | yyabortlab -- YYABORT comes here.  |
 `-----------------------------------*/
 yyabortlab:
+  yydestruct ("Error: discarding lookahead",
+              yytoken, &yylval);
+  yychar = YYEMPTY;
   yyresult = 1;
   goto yyreturn;