spdlog
spdlog is an open C++ logging library with synchronous or asynchronous loggers, rotating files, consoles, formatting, and custom sinks.
Why use it
Engines can standardize module logs and control cost between development and release builds.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
What to check
Design asynchronous overflow, thread shutdown, and disk policies explicitly; it does not replace telemetry governance.