Package: libspdlog-dev (1:1.5.0-1)

Very fast, header only or compiled, C++ logging library

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.