-typedef RETSIGTYPE (*SIGNAL_HANDLER)(int);
-
-/*
- * If not a POSIX machine, then we create our
- * own POSIX style signal sets functions. This
- * currently assumes you have 31 signals, which
- * should be true on most pure BSD machines.
- */
-#ifndef POSIX_SIGNALS
-# define sigemptyset(s) (*(s) = 0)
-# define sigfillset(s) (*(s) = ~((sigset_t) 0), 0)
-# define sigaddset(s,n) (*(s) |= (1 << ((n) - 1)), 0)
-# define sigdelset(s,n) (*(s) &= ~(1 << ((n) - 1)), 0)
-# define sigismember(s,n) ((*(s) & (1 << ((n) - 1))) != 0)
-#endif