12306 XPG4v2 slave pty behaviour should generally be disabled
Reviewed by: Robert Mustacchi <rm@fingolfin.org>
Change-ID: I7ccd399c22866f34dd20c6bb9d28e77ba4e24c67

@@ -159,11 +159,10 @@
 #define READ    0
 #define WRITE   1
 
 extern  char    *optarg;        /* Value of argument */
 extern  int     optind;         /* Indicator of argument */
-extern  int __xpg4;     /* defined in xpg4.c; 0 if not xpg4-compiled program */
 
 struct  Fspec   {
         char    Ftabs[22];
         char    Fdel;
         unsigned char   Flim;