From 9705ba2981016dd6b3b8d690bb8935a396cc0994 Mon Sep 17 00:00:00 2001
From: Daniel Jakots <vigdis@chown.me>
Date: Tue, 27 Sep 2016 19:22:21 +0200
Subject: [PATCH] BUILD: Make use of accept4() on OpenBSD.

OpenBSD >= 5.7 supports accept4(). Older versions are not supported
anymore anyway.

Patch originally from Brad Smith.
---
 Makefile | 3 ++-
 README   | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 0ce4b3253..f055a0827 100644
--- a/Makefile
+++ b/Makefile
@@ -309,10 +309,11 @@ ifeq ($(TARGET),osx)
   USE_TPROXY     = implicit
 else
 ifeq ($(TARGET),openbsd)
-  # This is for OpenBSD >= 3.0
+  # This is for OpenBSD >= 5.7
   USE_POLL       = implicit
   USE_KQUEUE     = implicit
   USE_TPROXY     = implicit
+  USE_ACCEPT4    = implicit
 else
 ifeq ($(TARGET),netbsd)
   # This is for NetBSD
diff --git a/README b/README
index 16982e14d..074a3b0f4 100644
--- a/README
+++ b/README
@@ -43,7 +43,7 @@ and assign it to the TARGET variable :
   - freebsd     for FreeBSD 5 to 10 (others untested)
   - netbsd      for NetBSD
   - osx         for Mac OS/X
-  - openbsd     for OpenBSD 3.1 and above
+  - openbsd     for OpenBSD 5.7 and above
   - aix51       for AIX 5.1
   - aix52       for AIX 5.2
   - cygwin      for Cygwin