https://issues.dlang.org/show_bug.cgi?id=19467

          Issue ID: 19467
           Summary: Don't support EV_SET on OSX?
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Mac OS X
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: druntime
          Assignee: nobody@puremagic.com
          Reporter: zoujiaqing@gmail.com

Undefined symbols for architecture x86_64:
  "__D4core3sys6darwinQl5event6EV_SETFNbNiPSQBmQBkQBjQBqQBg8kevent_tmstklPvZv",
referenced from:
      __D3app12updateEventsFiiibZv in io.o
ld: symbol(s) not found for architecture x86_64

--