Fix string_view detection

5096c0fe · Victor Zverovich · 5b3f9eab · 5096c0fe
Commit 5096c0fe authored Feb 10, 2018 by Victor Zverovich
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include/fmt/core.h include/fmt/core.h +2 -1

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--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -151,7 +151,8 @@
 namespace fmt { using std::basic_string_view; }
 // 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)
+       (FMT_GCC_VERSION == 0 || FMT_GCC_VERSION >= 700) && \
+       __cplusplus >= 201402L)
 # include <experimental/string_view>
 namespace fmt { using std::experimental::basic_string_view; }
 #else