From 7f1af7cb02aad67c8a02ea541c78dee5df4a70e5 Mon Sep 17 00:00:00 2001
From: Brian Harris <BrianHarris@users.noreply.github.com>
Date: Tue, 15 Oct 2019 12:56:58 -0500
Subject: [PATCH] Fix build with gcc version 7.4.0 (#5570)

---
 include/flatbuffers/base.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/flatbuffers/base.h b/include/flatbuffers/base.h
index 6e76a3f8e..a8b14073d 100644
--- a/include/flatbuffers/base.h
+++ b/include/flatbuffers/base.h
@@ -199,7 +199,7 @@ namespace flatbuffers {
   // to detect a header that provides an implementation
   #if defined(__has_include)
     // Check for std::string_view (in c++17)
-    #if __has_include(<string_view>) && (__cplusplus >= 201606 || _HAS_CXX17)
+    #if __has_include(<string_view>) && (__cplusplus >= 201606 || (defined(_HAS_CXX17) && _HAS_CXX17))
       #include <string_view>
       namespace flatbuffers {
         typedef std::string_view string_view;