Question 1

How to integrate Loguru with CMake in my C++ project?

Accepted Answer

Loguru supports CMake via add_subdirectory(), FetchContent(), or find_package(). The repository includes a CMake example showing detailed setup steps for seamless integration.

Question 2

Is Loguru better than GLOG for performance?

Accepted Answer

Yes, according to the README, Loguru is often faster than GLOG, especially with buffering enabled. Benchmarks show it can be 25%-75% faster unbuffered and twice as fast buffered on some systems.

Question 3

Can Loguru output logs in JSON format?

Accepted Answer

No, Loguru focuses on human-readable, grep-able text logs and does not natively support JSON. You would need to use custom callbacks or post-process the logs for JSON structuring.

Question 4

How does Loguru handle multi-threaded logging?

Accepted Answer

Loguru is thread-safe, as stated in the features. It prefixes logs with thread names or IDs, and you can set thread names programmatically using loguru::set_thread_name for better traceability.

Question 5

What are the verbosity levels in Loguru and how do I use them?

Accepted Answer

Loguru supports verbosity levels from 0 to 9, with higher numbers being more verbose. You can set levels via command line with -v or programmatically, and filter logs in files or stderr accordingly.

Question 6

How to use fmtlib with Loguru for advanced formatting?

Accepted Answer

Define LOGURU_USE_FMTLIB 1 before including loguru.hpp, and set up fmtlib in your build system with proper includes and linking. Alternatively, use FMT_HEADER_ONLY for a header-only approach, as per the README.

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