portability: rename accept to acceptsymbol because of MSVC

MSVC already defines this symbol.

* src/symtab.h, src/symtab.c (accept): Rename as...
(acceptsymbol): this.
Adjust dependencies.

src/ielr.c

@@ -423,7 +423,7 @@ ielr_item_has_lookahead (state *s, symbol_number lhs, size_t item,
              check all predecessors' goto follows for the LHS.  */
           if (item_number_is_rule_number (ritem[s->items[item] - 2]))
             {
-              aver (lhs != accept->content->number);
+              aver (lhs != acceptsymbol->content->number);
               for (state **predecessor = predecessors[s->number];
                    *predecessor;
                    ++predecessor)

src/reader.c

@@ -804,7 +804,7 @@ check_and_convert_grammar (void)
 
      $accept: %start $end.  */
   {
-    symbol_list *p = symbol_list_sym_new (accept, empty_loc);
+    symbol_list *p = symbol_list_sym_new (acceptsymbol, empty_loc);
     p->rhs_loc = grammar->rhs_loc;
     p->next = symbol_list_sym_new (startsymbol, empty_loc);
     p->next->next = symbol_list_sym_new (eoftoken, empty_loc);

src/reduce.c

@@ -160,9 +160,9 @@ inaccessable_symbols (void)
   bitset Pp = bitset_create (nrules, BITSET_FIXED);
 
   /* If the start symbol isn't useful, then nothing will be useful. */
-  if (bitset_test (N, accept->content->number - ntokens))
+  if (bitset_test (N, acceptsymbol->content->number - ntokens))
     {
-      bitset_set (V, accept->content->number);
+      bitset_set (V, acceptsymbol->content->number);
 
       while (1)
         {
@@ -301,7 +301,7 @@ nonterminals_reduce (void)
       for (item_number *rhsp = rules[r].rhs; 0 <= *rhsp; ++rhsp)
         if (ISVAR (*rhsp))
           *rhsp = symbol_number_as_item_number (nterm_map[*rhsp - ntokens]);
-    accept->content->number = nterm_map[accept->content->number - ntokens];
+    acceptsymbol->content->number = nterm_map[acceptsymbol->content->number - ntokens];
   }
 
   nsyms -= nuseless_nonterminals;
@@ -381,7 +381,7 @@ reduce_grammar (void)
     {
       reduce_print ();
 
-      if (!bitset_test (N, accept->content->number - ntokens))
+      if (!bitset_test (N, acceptsymbol->content->number - ntokens))
         complain (&startsymbol_loc, fatal,
                   _("start symbol %s does not derive any sentence"),
                   startsymbol->tag);

src/symtab.c

@@ -59,7 +59,7 @@ static semantic_type **semantic_types_sorted = NULL;
 symbol *errtoken = NULL;
 symbol *undeftoken = NULL;
 symbol *eoftoken = NULL;
-symbol *accept = NULL;
+symbol *acceptsymbol = NULL;
 symbol *startsymbol = NULL;
 location startsymbol_loc;
 
@@ -849,10 +849,10 @@ symbols_new (void)
                                    hash_symbol_comparator,
                                    symbol_free);
 
-  /* Construct the accept symbol. */
-  accept = symbol_get ("$accept", empty_loc);
-  accept->content->class = nterm_sym;
-  accept->content->number = nnterms++;
+  /* Construct the acceptsymbol symbol. */
+  acceptsymbol = symbol_get ("$accept", empty_loc);
+  acceptsymbol->content->class = nterm_sym;
+  acceptsymbol->content->number = nnterms++;
 
   /* Construct the YYerror/"error" token */
   errtoken = symbol_get ("YYerror", empty_loc);

src/symtab.h

@@ -245,7 +245,7 @@ extern symbol *eoftoken;
 /** The genuine start symbol.
 
    $accept: start-symbol $end */
-extern symbol *accept;
+extern symbol *acceptsymbol;
 
 /** The user start symbol. */
 extern symbol *startsymbol;