From 778ceed6f0f66f71d5c47ad7eac337ec114c934e Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Fri, 8 Feb 2019 19:09:07 +0000
Subject: [PATCH] Tentatively enable __float128 support for clang

---
 include/boost/config/compiler/clang.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/boost/config/compiler/clang.hpp b/include/boost/config/compiler/clang.hpp
index 3a59ff58..52b23d9d 100644
--- a/include/boost/config/compiler/clang.hpp
+++ b/include/boost/config/compiler/clang.hpp
@@ -57,6 +57,14 @@
 #  define BOOST_HAS_STDINT_H
 #endif
 
+#if (defined(linux) || defined(__linux) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)) && !defined(_CRAYC)
+#if (__clang_major__ >= 4) && defined(__has_include)
+#if __has_include(<quadmath.h>)
+#  define BOOST_HAS_FLOAT128
+#endif
+#endif
+#endif
+
 
 #define BOOST_HAS_NRVO