From 66afd9b33ad955a7cfbd333b65ee4b5ba0ebbab2 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Sat, 10 Feb 2018 05:16:16 -0800
Subject: [PATCH] Fix compilation on gcc 6

---
 include/fmt/core.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/fmt/core.h b/include/fmt/core.h
index ba14258b..7a566e78 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -147,7 +147,9 @@
     (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
 # include <string_view>
 namespace fmt { using std::basic_string_view; }
-#elif (FMT_HAS_INCLUDE(<experimental/string_view>) && __cplusplus >= 201402L)
+// std::experimental::basic_string_view::remove_prefix isn't constexpr in gcc 6.
+#elif (FMT_HAS_INCLUDE(<experimental/string_view>) && \
+       __cplusplus >= 201402L && FMT_GCC_VERSION >= 700)
 # include <experimental/string_view>
 namespace fmt { using std::experimental::basic_string_view; }
 #else