-#include "terminal.h" /* For HAVE_TERMIOS et.al. */
-
-#ifdef HAVE_TERMIOS
-# define PROCESS_GROUP_TYPE pid_t
-#elif defined (HAVE_TERMIO) || defined (HAVE_SGTTY)
-# define PROCESS_GROUP_TYPE int
-#endif
-
-#ifdef PROCESS_GROUP_TYPE
-/* Process group of the current inferior. */
-extern PROCESS_GROUP_TYPE inferior_process_group (void);
-#endif