--- libev/ev.h	2018/12/21 06:54:30	1.190
+++ libev/ev.h	2019/06/20 22:44:59	1.191
@@ -1,7 +1,7 @@
 /*
  * libev native API header
  *
- * Copyright (c) 2007-2018 Marc Alexander Lehmann <libev@schmorp.de>
+ * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modifica-
@@ -516,14 +516,15 @@
 
 /* method bits to be ored together */
 enum {
-  EVBACKEND_SELECT  = 0x00000001U, /* available just about anywhere */
-  EVBACKEND_POLL    = 0x00000002U, /* !win, !aix, broken on osx */
-  EVBACKEND_EPOLL   = 0x00000004U, /* linux */
-  EVBACKEND_KQUEUE  = 0x00000008U, /* bsd, broken on osx */
-  EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */
-  EVBACKEND_PORT    = 0x00000020U, /* solaris 10 */
-  EVBACKEND_ALL     = 0x0000003FU, /* all known backends */
-  EVBACKEND_MASK    = 0x0000FFFFU  /* all future backends */
+  EVBACKEND_SELECT   = 0x00000001U, /* available just about anywhere */
+  EVBACKEND_POLL     = 0x00000002U, /* !win, !aix, broken on osx */
+  EVBACKEND_EPOLL    = 0x00000004U, /* linux */
+  EVBACKEND_KQUEUE   = 0x00000008U, /* bsd, broken on osx */
+  EVBACKEND_DEVPOLL  = 0x00000010U, /* solaris 8 */ /* NYI */
+  EVBACKEND_PORT     = 0x00000020U, /* solaris 10 */
+  EVBACKEND_LINUXAIO = 0x00000040U, /* Linuix AIO */
+  EVBACKEND_ALL      = 0x0000007FU, /* all known backends */
+  EVBACKEND_MASK     = 0x0000FFFFU  /* all future backends */
 };
 
 #if EV_PROTOTYPES