From ee8dd08c6c6465e41bf9bb9b6e9f2584f93f4590 Mon Sep 17 00:00:00 2001
From: Jeremy Nimmer <jeremy.nimmer@tri.global>
Date: Mon, 30 Sep 2019 09:45:59 -0400
Subject: [PATCH] Fix storage deprecation warning when in C++17 mode

Fixes "error: redundant redeclaration of 'constexpr' static data member
'ghc::filesystem::path_helper_base<char_type>::preferred_separator'
[-Werror=deprecated]" when compiling with GCC 7.4 in -std=c++17 mode.
---
 include/ghc/filesystem.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/ghc/filesystem.hpp b/include/ghc/filesystem.hpp
index c18745c..c26f4d5 100644
--- a/include/ghc/filesystem.hpp
+++ b/include/ghc/filesystem.hpp
@@ -204,8 +204,10 @@ class path_helper_base
 #endif
 };
 
+#if  __cplusplus < 201703L
 template <typename char_type>
 constexpr char_type path_helper_base<char_type>::preferred_separator;
+#endif
     
 // 30.10.8 class path
 class GHC_FS_API_CLASS path