MFC r362569 (by jkim):

Fix build with recent byacc.

S3curity:

libexec/ftpd/ftpcmd.y

@@ -72,6 +72,8 @@ __FBSDID("$FreeBSD$");
 #include "extern.h"
 #include "pathnames.h"
 
+#define	yylex	ftpcmd_yylex
+
 off_t	restart_point;
 
 static	int cmd_type;

usr.bin/localedef/localedef.c

@@ -257,7 +257,9 @@ main(int argc, char **argv)
 	init_numeric();
 	init_time();
 
+#if YYDEBUG
 	yydebug = 0;
+#endif
 
 	(void) setlocale(LC_ALL, "");
 

usr.bin/localedef/localedef.h

@@ -47,7 +47,9 @@ extern int mb_cur_max;
 extern int mb_cur_min;
 extern int last_kw;
 extern int verbose;
+#if YYDEBUG
 extern int yydebug;
+#endif
 extern int lineno;
 extern int undefok;	/* mostly ignore undefined symbols */
 extern int warnok;

usr.sbin/rrenumd/parser.y

@@ -139,7 +139,7 @@ statement:
 debug_statement:
 		DEBUG_CMD flag EOS
 		{
-#ifdef YYDEBUG
+#if YYDEBUG
 			yydebug = $2;
 #endif /* YYDEBUG */
 		}