* src/bison.simple: Remove YYERROR_VERBOSE using.

Use %%error_verbose.
(yyparse): Likewise.
* src/output.c (prepare): Give its final value.
* src/muscle_tab.c (muscle_init): Init new muscle 'error_verbose'.
* src/getargs.h: Add its extern declaration.
* src/getargs.c (error_verbose_flag): New int.
(getargs): Update to catch new case.
* src/options.c (option_table): 'error-verbose' is a new option.
(shortopts): Update.

src/bison.simple

@@ -149,13 +149,6 @@ typedef struct yyltype
 # define YYLTYPE %%ltype
 #endif
 
-#ifndef YYERROR_VERBOSE
-# define YYERROR_VERBOSE %%verbose
-#else
-# undef YYERROR_VERBOSE
-# define YYERROR_VERBOSE 1
-#endif
-
 /* Tokens.  */
 %%tokendef
 
@@ -197,7 +190,7 @@ static const short yyrline[] =
 };
 #endif
 
-#if YYDEBUG || YYERROR_VERBOSE
+#if %%error_verbose
 /* YYTNME[TOKEN_NUM] -- String name of the token TOKEN_NUM.  */
 static const char *const yytname[] =
 {
@@ -826,7 +819,7 @@ yyerrlab:
     {
       ++yynerrs;
 
-#if YYERROR_VERBOSE
+#if %%error_verbose
       yyn = yypact[yystate];
 
       if (yyn > YYFLAG && yyn < YYLAST)
@@ -869,7 +862,7 @@ yyerrlab:
 	    yyerror ("parse error; also virtual memory exhausted");
         }
       else
-#endif /* YYERROR_VERBOSE */
+#endif /* %%ERROR_VERBOSE */
         yyerror ("parse error");
     }
   goto yyerrlab1;