I'm looking to use a logging class with a license that allows its free use.
I have looked at Easylogging, GitHub - easylogging/easyloggingpp: Single header only C++ logging library. It is extremely light-weight, robust, fast performing, thread and type safe and consists of many built-in features. It provides ability to write logs in your own customized format. It also provide support for logging your classes, third-party libraries, STL and third-party containers etc., and Dr Dobbs Logger, A Lightweight Logger for C++ | Dr Dobb's.
I'm looking just log instrument calls, threads opening/closing, warnings, exceptions, etc. in a multi-threaded environment. I plan to mostly just want to put things into a text file. So, from what I gather a simple logger should handle all my needs.
Any suggestions?