From 62189d3b860769923b007d1982682159a8de80d9 Mon Sep 17 00:00:00 2001
From: Glen Fernandes <glen.fernandes@gmail.com>
Date: Sun, 11 Jun 2017 17:50:15 -0400
Subject: [PATCH] Add BOOST_FALLTHROUGH for gcc

---
 include/boost/config/compiler/gcc.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/boost/config/compiler/gcc.hpp b/include/boost/config/compiler/gcc.hpp
index a759c4b4..da05a63e 100644
--- a/include/boost/config/compiler/gcc.hpp
+++ b/include/boost/config/compiler/gcc.hpp
@@ -299,6 +299,10 @@
 #  define BOOST_NO_CXX17_FOLD_EXPRESSIONS
 #endif
 
+#if __GNUC__ >= 7
+#  define BOOST_FALLTHROUGH __attribute__((fallthrough))
+#endif
+
 //
 // Unused attribute:
 #if __GNUC__ >= 4