From 53ba5581070bc8914a35a5e16af901c562923e61 Mon Sep 17 00:00:00 2001
From: Oliver Reiche <oliver.reiche@huawei.com>
Date: Mon, 28 Aug 2023 18:05:23 +0200
Subject: fmt: Specialize formatter only for version >= 10

---
 src/utils/cpp/json.hpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/utils/cpp/json.hpp')

diff --git a/src/utils/cpp/json.hpp b/src/utils/cpp/json.hpp
index 9fd2d66d..d83f30ed 100644
--- a/src/utils/cpp/json.hpp
+++ b/src/utils/cpp/json.hpp
@@ -21,6 +21,7 @@
 #include <string>
 #include <unordered_map>
 
+#include "fmt/core.h"
 #include "fmt/ostream.h"
 #include "gsl/gsl"
 #include "nlohmann/json.hpp"
@@ -213,10 +214,12 @@ namespace detail {
     return old_abbrev;
 }
 
+#if defined(FMT_VERSION) and FMT_VERSION >= 100000
 // Use nlohmann::basic_json::operator<<() for formatting via libfmt.
 // This explicit template specialization seems to be required starting with
 // libfmt 10.x.
 template <>
 struct fmt::formatter<nlohmann::basic_json<>> : ostream_formatter {};
+#endif
 
 #endif  // INCLUDED_SRC_UTILS_CPP_JSON_HPP
-- 
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