• Updated bundled fmt to version 10.2.1.
• Mapped Diagnostic Context (MDC) support by @massimiliano96 in https://github.com/gabime/spdlog/pull/2907. MDC is a simple map of key->string values stored in thread local storage whose content will be printed by the loggers. Usage example:

#include "spdlog/mdc.h"
..
spdlog::mdc::put("mdc_key_1", "mdc_value_1");
spdlog::info("Hello, {}", "World!");  // => [2024-04-26 02:08:05.040] [info] [mdc_key_1:mdc_value_1] Hello, World!

• Add milliseconds support to stopwatch by @brodao2 in https://github.com/gabime/spdlog/pull/3034
• Add std::string_view overloads for logger accessor by @BenLeadbetter in https://github.com/gabime/spdlog/pull/3023
• Make async_logger::flush() synchronous - wait for the flush operation to complete before returning by @walkerlala in https://github.com/gabime/spdlog/pull/3049
• Use _stat() on Windows to be more UTF8 friendly by @liubing in https://github.com/gabime/spdlog/pull/2978
• Add details about how compile time macros work by @egaban in https://github.com/gabime/spdlog/pull/2981
• Fix typos found by codespell by @DimitriPapadopoulos in https://github.com/gabime/spdlog/pull/3011
• Expose the flusher thread object to user in order to allow setting of thread name and thread affinity when needed by @cohdan in https://github.com/gabime/spdlog/pull/3009
• Fix the problem of compilation failure under MINGW by @NU-LL in https://github.com/gabime/spdlog/pull/3022
• Add missing include in circular_q.h by @magnus-nomono in https://github.com/gabime/spdlog/pull/3026
• Fix #3038 by @Tomas-Zhu in https://github.com/gabime/spdlog/pull/3044
• Don't remove previous defaullt logger from registry in set_default_logger. Fix #3016
• Remove the legacy AnalyzeTemporaryDtors option from .clang-tidy. by @shaharv in https://github.com/gabime/spdlog/pull/3048
• Updated INSTALL.md has to better reflect compiler info by KaganCanSit in https://github.com/gabime/spdlog/pull/3052
• Fixed README.md example by @darallium in https://github.com/gabime/spdlog/pull/3066

Full Changelog: https://github.com/gabime/spdlog/compare/v1.13.0...v1.14.0

Special thanks to @tt4g for helping with community questions and issues.