From c0fc69cbee72d3b5751e59d731fbf3a90facd7c2 Mon Sep 17 00:00:00 2001
From: Jan Beich <jbeich@FreeBSD.org>
Date: Mon, 27 Aug 2018 15:15:12 +0000
Subject: [PATCH] Adjust a8c03a77ec6c for all libc++ systems

---
 extern/iomanip.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/extern/iomanip.h b/extern/iomanip.h
index 6393d859..dd7815c8 100644
--- a/extern/iomanip.h
+++ b/extern/iomanip.h
@@ -1,6 +1,8 @@
 #pragma once
 
-#ifdef OSX
+#include <cstddef>
+
+#ifdef _LIBCPP_VERSION
 #include <iomanip>
 #else