Defined in 4 files as a macro:
- contrib/ntp/include/ntp_tty.h, line 60 (as a macro)
- contrib/ntp/ntpd/refclock_hopfser.c, line 37 (as a macro)
- contrib/ntp/ntpd/refclock_neoclock4x.c, line 44 (as a macro)
- contrib/ntp/ntpd/refclock_palisade.h, line 67 (as a macro)