From d6a78cb85b8bb5b530e07861839a66b6d8f46c18 Mon Sep 17 00:00:00 2001
From: yunzhong <1445277435@qq.com>
Date: Sun, 12 Sep 2021 15:25:55 +0800
Subject: [PATCH] fix mongo_sink<std::mutex>::instance_ template

---
 include/spdlog/sinks/mongo_sink.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/spdlog/sinks/mongo_sink.h b/include/spdlog/sinks/mongo_sink.h
index 10573cf1e..34f4ee337 100644
--- a/include/spdlog/sinks/mongo_sink.h
+++ b/include/spdlog/sinks/mongo_sink.h
@@ -72,6 +72,7 @@ class mongo_sink : public base_sink<Mutex>
     std::string coll_name_;
     std::unique_ptr<mongocxx::client> client_ = nullptr;
 };
+template<>
 mongocxx::instance mongo_sink<std::mutex>::instance_{};
 
 #include "spdlog/details/null_mutex.h"