From 0c605bf32f4b323ef25ce9b4d953906f3a266545 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Wed, 5 Sep 2018 20:45:51 +0300
Subject: [PATCH] MacOS doesn't have quick_exit; Cygwin doesn't declare it in
 C++03 mode

---
 include/boost/core/quick_exit.hpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/boost/core/quick_exit.hpp b/include/boost/core/quick_exit.hpp
index c001107..5c2e7bb 100644
--- a/include/boost/core/quick_exit.hpp
+++ b/include/boost/core/quick_exit.hpp
@@ -18,6 +18,12 @@
 #include <boost/config.hpp>
 #include <cstdlib>
 
+#if defined(__CYGWIN__) && __cplusplus < 201103L
+
+extern "C" _Noreturn void quick_exit(int);
+
+#endif
+
 namespace boost
 {
 
@@ -27,6 +33,10 @@ BOOST_NORETURN void quick_exit( int code ) BOOST_NOEXCEPT
 
     ::_exit( code );
 
+#elif defined(__APPLE__)
+
+    ::_Exit( code );
+
 #else
 
     ::quick_exit( code );