From 0df7552f38cc059defa4189d7a36101925559eb8 Mon Sep 17 00:00:00 2001
From: Marshall Clow <marshall@idio.com>
Date: Fri, 19 May 2017 12:22:13 -0600
Subject: [PATCH] define BOOST_NO_AUTO_PTR when building with libc++ and C++17

New libc++ versions remove `std::auto_ptr` when building as C++17, unless the magic tag `_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR` is defined. Tell the rest of Boost that there's no `auto_ptr` in that case.
---
 include/boost/config/stdlib/libcpp.hpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/boost/config/stdlib/libcpp.hpp b/include/boost/config/stdlib/libcpp.hpp
index 2eea9997..e6b494c1 100644
--- a/include/boost/config/stdlib/libcpp.hpp
+++ b/include/boost/config/stdlib/libcpp.hpp
@@ -91,6 +91,9 @@
 #if (_LIBCPP_VERSION < 4000) || (__cplusplus <= 201402L)
 #  define BOOST_NO_CXX17_STD_APPLY
 #endif
+#if (_LIBCPP_VERSION > 4000) && (__cplusplus > 201402L) && !defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
+#  define BOOST_NO_AUTO_PTR
+#endif
 
 #if (_LIBCPP_VERSION <= 1101) && !defined(BOOST_NO_CXX11_THREAD_LOCAL)
 // This is a bit of a sledgehammer, because really it's just libc++abi that has no