some fixes for gcc

example/bench.cpp

@@ -113,7 +113,7 @@ void bench(int howmany, std::shared_ptr<spdlog::logger> log)
     auto start = system_clock::now();
     for (auto i = 0; i < howmany; ++i)
     {
-        log->info("Hello logger: msg number ", i);
+        log->info("Hello logger: msg number {}", i);
     }
 
 

include/spdlog/details/pattern_formatter_impl.h

@@ -289,7 +289,7 @@ class T_formatter :public flag_formatter
 class z_formatter :public flag_formatter
 {
 public:
-    const std::chrono::seconds cache_refresh = const std::chrono::seconds(5);
+    const std::chrono::seconds cache_refresh = std::chrono::seconds(5);
 
     z_formatter() :_last_update(std::chrono::seconds(0)) {}
     z_formatter(const z_formatter&) = delete;