From 38cbd073511c9b80eded091ba125445f548f7ca2 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Thu, 10 Dec 2020 17:02:20 +0000
Subject: [PATCH] Add missing file

---
 build/is_legacy_03.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 build/is_legacy_03.cpp

diff --git a/build/is_legacy_03.cpp b/build/is_legacy_03.cpp
new file mode 100644
index 00000000..78c36e19
--- /dev/null
+++ b/build/is_legacy_03.cpp
@@ -0,0 +1,16 @@
+/*
+ *
+ * Copyright (c) 2020
+ * John Maddock
+ *
+ * Use, modification and distribution are subject to the 
+ * Boost Software License, Version 1.0. (See accompanying file 
+ * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ *
+ */
+
+#include <boost/regex/config.hpp>
+
+#ifdef BOOST_REGEX_CXX03
+#error "Legacy mode"
+#endif