Modernise yyerror

Newer versions of bison emit a prototype for yyerror
	void yyerror (const char *);
This clashes with some of our old code that declares yyerror to return
an int.  Fix that in most cases by modernizing yyerror.  bfin-parse.y
uses the return value all over the place, so for there disable
generation of the prototype as specified by posix.

binutils/
	* arparse.y (yyerror): Return void.
	* dlltool.c (yyerror): Likewise.
	* dlltool.h (yyerror): Likewise.
	* sysinfo.y (yyerror): Likewise.
	* windmc.h (yyerror): Likewise.
	* mclex.c (mc_error): Extract from ..
	(yyerror): ..here, both now returning void.
gas/
	* config/bfin-parse.y (yyerror): Define.
	(yyerror): Make static.
	* itbl-parse.y (yyerror): Return void.
ld/
	* deffilep.y (def_error): Return void.

binutils/arparse.y

@@ -31,7 +31,7 @@
 #include "arsup.h"
 extern int verbose;
 extern int yylex (void);
-static int yyerror (const char *);
+static void yyerror (const char *);
 %}
 
 %union {
@@ -193,11 +193,10 @@ verbose_command:
 
 %%
 
-static int
+static void
 yyerror (const char *x ATTRIBUTE_UNUSED)
 {
   extern int linenumber;
 
   printf (_("Syntax error in archive script, line %d\n"), linenumber + 1);
-  return 0;
 }

binutils/dlltool.c

@@ -990,13 +990,11 @@ static int d_nforwards = 0;	/* Number of forwarded exports.  */
 static int d_is_dll;
 static int d_is_exe;
 
-int
+void
 yyerror (const char * err ATTRIBUTE_UNUSED)
 {
   /* xgettext:c-format */
   non_fatal (_("Syntax error in def file %s:%d"), def_file, linenumber);
-
-  return 0;
 }
 
 void

binutils/dlltool.h

@@ -31,7 +31,7 @@ extern void def_section (const char *, int);
 extern void def_stacksize (int, int);
 extern void def_version (int, int);
 extern int  yyparse (void);
-extern int  yyerror (const char *);
+extern void yyerror (const char *);
 extern int  yylex (void);
 
 extern int yydebug;

binutils/mclex.c

@@ -103,14 +103,19 @@ mc_fatal (const char *s, ...)
 }
 
 
-int
-yyerror (const char *s, ...)
+static void
+mc_error (const char *s, ...)
 {
   va_list argp;
   va_start (argp, s);
   show_msg ("parser", s, argp);
   va_end (argp);
-  return 1;
+}
+
+void
+yyerror (const char *s)
+{
+  mc_error (s);
 }
 
 static unichar *
@@ -451,7 +456,7 @@ yylex (void)
 	yylval.ustr = get_diff (input_stream_pos, start_token);
 	return MCIDENT;
       }
-    yyerror ("illegal character 0x%x.", ch);
+    mc_error ("illegal character 0x%x.", ch);
   }
   return -1;
 }

binutils/sysinfo.y

@@ -33,7 +33,7 @@ static int rdepth;
 static char *names[] = {" ","[n]","[n][m]"};
 static char *pnames[]= {"","*","**"};
 
-static int yyerror (char *s);
+static void yyerror (const char *s);
 extern int yylex (void);
 %}
 
@@ -434,9 +434,8 @@ if (writecode == 'd')
 return 0;
 }
 
-static int
-yyerror (char *s)
+static void
+yyerror (const char *s)
 {
   fprintf(stderr, "%s\n" , s);
-  return 0;
 }

binutils/windmc.h

@@ -80,7 +80,7 @@ mc_node_lang *mc_add_node_lang (mc_node *, const mc_keyword *, rc_uint_type);
 mc_node *mc_add_node (void);
 
 /* Standard yacc/flex stuff.  */
-int yyerror (const char *, ...);
+void yyerror (const char *);
 int yylex (void);
 int yyparse (void);