Defined in 3 files as a macro:
- contrib/libevent/WIN32-Code/nmake/event2/event-config.h, line 328 (as a macro)
- contrib/ntp/sntp/libevent/WIN32-Code/nmake/event2/event-config.h, line 328 (as a macro)
- usr.sbin/ntp/libntpevent/event2/event-config.h, line 557 (as a macro)