/* check for POSIX signals */
#if defined(HAVE_SIGACTION) && defined(HAVE_SIGPROCMASK)
# define POSIX_SIGNALS
#endif

/* If !POSIX, try for BSD.. Reason: 4.4BSD implements these as wrappers */
#if !defined(POSIX_SIGNALS)
# if defined(HAVE_SIGVEC) && defined(HAVE_SIGSETMASK) && defined(HAVE_SIGBLOCK)
#  define BSD_SIGNALS
# endif
#endif