From b914f2b6a897ad45e48928b87b08db6150d06882 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Wed, 19 Jun 2019 11:52:55 +0100
Subject: [PATCH] Try to correct clang defect logic.

---
 include/boost/config/compiler/clang.hpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/boost/config/compiler/clang.hpp b/include/boost/config/compiler/clang.hpp
index cad37487..94cce3a5 100644
--- a/include/boost/config/compiler/clang.hpp
+++ b/include/boost/config/compiler/clang.hpp
@@ -256,11 +256,10 @@
 #  define BOOST_NO_CXX14_BINARY_LITERALS
 #endif
 
-#if !__has_feature(__cxx_decltype_auto__)
-#if (__clang_major__ > 3)
+#if !__has_feature(__cxx_decltype_auto__) && (__clang_major__ > 3)
+// This fails with debug info enabled for clang 3.5:
 #  define BOOST_NO_CXX14_DECLTYPE_AUTO
 #endif
-#endif
 
 #if !__has_feature(__cxx_aggregate_nsdmi__)
 #  define BOOST_NO_CXX14_AGGREGATE_NSDMI