libspdlog-dev - 1:1.12.0+ds-2+b1 main

Features: Very fast - performance is the primary goal; Headers only; No
dependencies - just copy and use; call style using the excellent cppformat
library; ostream call style is supported too; Optional extremely fast
asynchronous mode - using lockfree queues and other tricks to reach millions
of calls/sec; Custom formatting; Multi/Single threaded loggers; Easily
extendable with custom log targets (just implement a single function in the
sink interface). Severity based filtering - threshold levels can be modified
in runtime as well as in compile time.
.
Various log targets:
Rotating log files, Daily log files, Console logging, Linux syslog.