Fix #1115

include/spdlog/logger-inl.h

@@ -58,7 +58,7 @@ SPDLOG_INLINE void swap(logger &a, logger &b)
     a.swap(b);
 }
 
-void logger::log(source_loc loc, level::level_enum lvl, const char *msg)
+SPDLOG_INLINE void logger::log(source_loc loc, level::level_enum lvl, const char *msg)
 {
     if (!should_log(lvl))
     {
@@ -231,4 +231,4 @@ SPDLOG_INLINE void logger::err_handler_(const std::string &msg)
         fmt::print(stderr, "[*** LOG ERROR ***] [{}] [{}] {}\n", date_buf, name(), msg);
     }
 }
-} // namespace spdlog
+} // namespace spdlog