version 1.16.0

• Bump bundled {fmt} library to 12.0.0
• Use std::getenv #3414 by @kfeng123 in #3415
• Remove unnecessary and inconsistent "final" from color sinks by @vadz in #3430
• Fix ringbuffer sink for zero buffer size by @gabime in #3436
• Add option to override CMAKE_DEBUG_POSTFIX by @joshuachp in #3433
• Update README.md by @yalov in #3437
• Added timeout for TCP calls such as connect, send, recv by @LowLevelLore in #3432
• Run tests in the order they are declared by @xvitaly in #3451
• Remove the fileapi.h include in os-inl.h by @MasonAngelio in #3444

Full Changelog: v1.15.3...v1.16.0

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

Version 1.15.3

• Bumped bundled {fmt} library to 11.2.0 by @gabime in #3399
• Fixed incorrect behavior in dup_filter_sink when reporting skipped messages by @SleepingSoul in #3390
• Fixed MSVC C4530 warning when exceptions are disabled by @roeas in #3393
• Added support for modifying max-size and max-files in rotating_file_sink after creation by @gabime in #3397
• Added spdlog::register_or_replace(new_logger) to safely replace existing loggers in the registry by @gabime in #3398
• Fixed broken links to the wiki and local references by @cgringmuth in #3377 and #3378, and by @non-descriptive in #3381

Full Changelog: v1.15.2...v1.15.3

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

Version 1.15.2

• Upgraded bundled {fmt} to version 11.1.4 (faa0a7a)
• Fixed #3360, discovered by OSS-Fuzz regarding the %D format flag, in #3361
• Fixed #3352: %z (UTC offset) on Apple and POSIX.1-2024-conforming platforms by @toh-ableton in #3366
• Updated README with ALT Linux installation instructions by @lubyagin in #3338

Full Changelog: v1.15.1...v1.15.2

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

Version 1.15.1

• Update bundled fmt version to 11.1.3 by @gabime in #3332
• Use fwrite_unlocked() if available by @gabime in #3276 and #3318
• On-demand truncation for basic file sinks by @matteodelseppia in #3280
• Allow manual rotation of rotating_file_sink by @hjs-ast in #3269
• Make null_sink final by @gabime in #3267
• Fix: Add explicit fmt:: and std:: to avoid ambiguous calls by @LiAuTraver in #3259
• Fix: Pass /utf-8 only when the compiler is MSVC by @miyanyan in #3260
• Fix: Support bin_to_hex() when using std::format by @koniarik in #3315
• Support custom environment variables for load_env_levels by @ken-matsui in #3327
• Fix: Added a lock to rotate_now() by @matteodelseppia in #3281
• Fix: Update to_string_view function for fmt 11.1 by @chenrui333 in #3301
• Fix: Remove unused to_string_view overload in fmt >= 11.1 by @jdrouhard in #3314
• Fix: Use string_view_literals to resolve issues #3287 and #3233 by @yalov in #3291
• Fix: Added a lock to set_color_mode(..) in ansicolor_sink by @gabime in #3323
• Fix: Corrected comment in daily_file_sink by @F1F88 in #3249
• Fix: Compatibility with fmtlib 11.1.1 by @yachoor in #3331

Full Changelog: v1.15.0...v1.15.1

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

Version 1.15.0

What's Changed

• Update bundled fmt to 11.0.2 by @gabime in #3236
• Add wide character formatting and output support to console in wincolor_sink. by @DominikGrabiec in #3092
• Allow customization of syslog_sink by @Silex in #3124
• make example compatible with fmt 11 by @ziyao233 in #3130
• Fix building with FMT_ENFORCE_COMPILE_STRING by @AJIOB in #3137
• fix: set /Zc:__cplusplus and /MP to MSVC only by @zjyhjqs in #3139
• V1.x : fixed "suggest override" errors for gcc 8.5 and gcc 9.1 by @esmirno in #3158
• Add info about max_files in the docstrings of hourly/daily file sinks by @themightyoarfish in #3170
• use std::lock_guard instead of std::unique_lock by @wsehjk in #3179
• fix/issue-3101: fix the issue where mdc ignores SPDLOG_NO_TLS by @Allen-20180115 in #3184
• Update mdc.h error message by @gabime in #3185
• [docs] Update conan install command in README by @uilianries in #3172
• Update CMakeLists.txt, Fix spelling errors by @zgzhengSEU in #3193
• Fix warning - extra ';' for -Wextra-semi by @hydai in #3198
• Improve Cross-Platform Build Instructions in Documentation by @Mq-b in #3229
• Exchange promise for condition_variable when flushing (fixes #3221) by @Oipo in #3228
• Ensure flush callback gets called in move-assign operator by @Oipo in #3232
• Make flush async again in async logger to prevent crashes and hangs by @gabime in #3235
• Update README.md by @gabime in #3240
• utf8_to_wstrbuf now handles invalid utf8 sequences by @captainurist in #3244 and #3245
• Added tsan option to CMake and CI by @gabime in #3237 and #3247
  /pull/3244

Full changelog: v1.14.1...v1.15.0

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

Version 1.14.1

• Fixed compatibility issue between c++17 and c++11 (#3081).
• Fixed creating folders under windows when full path with drive letter is given (#3079).
• Added mdc sample. Note: mdc is not supported in async loggers.

Version 1.14.0

• Updated bundled fmt to version 10.2.1.
• Mapped Diagnostic Context (MDC) support by @massimiliano96 in #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 #3034
• Add std::string_view overloads for logger accessor by @BenLeadbetter in #3023
• Make async_logger::flush() synchronous - wait for the flush operation to complete before returning by @walkerlala in #3049
• Use _stat() on Windows to be more UTF8 friendly by @liubing in #2978
• Add details about how compile time macros work by @egaban in #2981
• Fix typos found by codespell by @DimitriPapadopoulos in #3011
• Expose the flusher thread object to user in order to allow setting of thread name and thread affinity when needed by @cohdan in #3009
• Fix the problem of compilation failure under MINGW by @NU-LL in #3022
• Add missing include in circular_q.h by @magnus-nomono in #3026
• Fix #3038 by @Tomas-Zhu in #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 #3048
• Updated INSTALL.md has to better reflect compiler info by KaganCanSit in #3052
• Fixed README.md example by @darallium in #3066

Full Changelog: v1.13.0...v1.14.0

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

Version 1.13.0

Release Notes

Enhancements

• Qt Sink: Allow for darker colors for light backgrounds (#2817). Thanks to @krawq.
• Set CMAKE_BUILD_TYPE only for single-config generators (#2839). Thanks to @moritz-h.
• Provide spdlog_header_only in build directory export (#2846). Thanks to @robertmaynard.
• Add SPDLOG_TO_VERSION to compare spdlog version (#2853). Thanks to @kegechen.
• Support async_overflow_policy::discard_new (#2876). Thanks to @walkerlala.
• Make syslog_sink.h's syslog_prio_from_level protected (#2918). Thanks to @shannonbooth.
• Fix OS availability check of pthread_threadid_np for iOS (#2897). Thanks to @lowdesertpunk.
• Add .git-blame-ignore-revs to ignore clang-format related commits (#2899). Thanks to @lowdesertpunk.
• Match SPDLOG_CONSTEXPR_FUNC to FMT_CONSTEXPR (#2901). Thanks to @kkraus14.

Bug Fixes

• Check fd_ is not nullptr in file_helper to prevent possible crash if disk is full (#2972).
• Fix encoding issue in qt_sinks (#2862). Thanks to @neothenil and @tt4g .
• Fix wrong thread_id (TID) in systemd_sink.h (#2919). Thanks to @M010.
• Update example.cpp to fix the vector issue in bin_example (#2963). Thanks to @zhuzhzh.
• Fix MSVC compile flag for no exceptions (#2974). Thanks to @Programicus.
• Fix bug in circular_q::size() (#2820).
• Fix link to fmt license file (#2967).

Maintenance

• Added and updated various tests for circular_q.
• Removed obsolete part from CMake configuration files (#2871). Thanks to @albert-github.
• Removed policy_max from cmake_minimum_required(..).
• Updated clang-format to google style and updated various formatting scripts.
• Bumped catch2

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

Version 1.12.0

• Support for external fmtlib versions 10.x (#2694). Thanks @H1X4Dev and @mguludag.
• Better support for std::format (#2359, #2544, #2680, #2688). Thanks @eli-b , @sylveon and @bachittle.
• Added new qt color sink. Logs to QTextEdit widget with some nice colors.
• Update #include to a deprecated fmt header (#2545) .Thanks @kromain.
• Fixes and impovements to dup_filter_sink (#2549, #2563). Thanks @zydxhs and @zhuyadong.
• Fix unnecessary empty backtrace begin/end logs (#2568). Thanks @koldi.
• Fixed variable name in msvc_sink (#2573). Thanks @naddu77.
• Add system includes (SPDLOG_SYSTEM_INCLUDES) cmake option (#2575). Thanks @dpayne.
• Improve dequeue of the async queue (@2587, #2588 ). Thanks @alokpr.
• Fix tcp_client sink for FreeBSD (#2590). Thanks @segoon.
• Support linux/musl libc (#2589). Thanks @kraj.
• Support newlib C library configurations without tm_gmtoff field (#2600). Thanks @igrr.
• Fix type of event id in win_eventlog_sink (#2598). Thanks @Tagl.
• Fix -Wshadow warnings in spdlog::sinks::dist_sink (#2599). Thanks @robinlinden.
• Spelling corrections (#2606, #2732). Thanks @albert-github and @zencatalyst.
• Add sync() function to file_helper (#2343). Thanks @espkk.
• Add a trivial callback_sink (#2610). Thanks @maghorbani.
• Fix unexpected delimiter at start of line in to_hex formatter (#2627). Thanks @starsunyzl.
• Fix MinGW build issue on example (#2642). Thanks @zEuS0390.
• Add optional TID definition to the systemd sink (#2619). Thanks @chardin-cpi.
• Added apply_logger_env_levels() (#2648, #2649). Thanks @afshinpir.
• Support utf8 in msvc_sink (#2651). Thanks @Demonese.
• Better handling of utf to wchar (66407f5).
• Use catch v3 for tests (#2656, #2659). Thanks @xvitaly and @seker.
• New kafka sink (#2655). Thanks @vbirds and @SpriteOvO.
• Fix os namespace in systemd_sink.h (#2668). Thanks @MyNameIsLame.
• Enable systemd_sink tests in linux pipeline (#2669). Thanks @MyNameIsLame.
• Fix stdout_sink_base::log's fflush() behaviour inconsistency (#2646). Thanks @25077667.
• Fix for missing pthread_threadid_np in macOS < 10.6 and PowerPC (#2715). Thanks @barracuda156.
• Fix ringbuffer_sink moving warning (#2722). Thanks @jamesruan.
• Update INSTALL doc (#2775). Thanks @7starsea.
• Fix warning in qt_sinks.h (#2781). Thanks @dayfixer.
• Remove IPv4 limitation from tcp_client (#2790). Thanks @Simon-Janos.
• Fix android sink when message is not loggable (#2801). Thanks @lucasrangit.

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

Version 1.11.0

• Update to fmt lib version 9.1.0 #2346, #2485, #2512, #2517 . Thanks @sylveon, @YunchengLiu, @tt4g, @tycho and @vitaut
• Fix template instantiation warning #2336 . Thanks @aengusjiang
• Event handlers improvements #2342, #2375 . Thanks @espkk and @kslattery
• Allow modifying the used Android buffer ID #2358. Thanks @tiolan
• Fix clone in async test #2364. Thanks @stkw0
• Custom formatting optimization #2365. Thanks @conr2d
• Fix C++14 builds for gcc 4.x (#2333) #2372 . Thanks @kslattery
• Add minor version to CMake's SOVERSION #2376
• Allow compilation with FMT_ENFORCE_COMPILE_STRING #2381. Thanks @john4744
• Fix pkg-config generation #2383. Thanks @alexshpilkin
• Remove unused code from null_mutex #2385. Thanks @panzhongxian
• Fix redundant std::move #2396. Thanks @polesapart
• Remove the empty file if in first period in hourly logger #2386. Thanks @panzhongxian
• Add reset_overrun_counter() function to the async logging #2399 Thanks @bergen4
• Set C++20 in CMake when SPDLOG_USE_STD_FORMAT option is turned on #2402. Thanks @cookcocck
• Fix mingw test #2415. Thanks @neheb
• Support for any std::chrono::duration type in flush_every(..) #2439. Thanks @LucasChollet
• Fix implicit casting of level_enum #2443. Thanks @ibmibmibm
• Comment fix #2445. Thanks @Hish15
• Fix gcc 4.x build #2449. Thanks @Simon-Janos
• Add openSUSE installation instructions #2468. Thanks @LorenDB
• Fixed missing include file in stopwatch.h #2434. Thanks @fabianbuettner
• Support for omitting source info by defining SPDLOG_NO_SOURCE_LOC #2476. Thanks @nigels-com
• Added SPDLOG_BUILD_PIC build option to CMake #2475. Thanks @nigels-com
• Fix include windows.h #2495. Thanks @panicgh
• Workaround gcc 12 warnings #2498, #2499 . Thanks @offa
• Migrate to Github Actions CI #2500. Thanks @offa
• Replace iterator difference with std::distance #2509 Thanks @kin4stat
• Export targets file to build directory at configure time #2514, #2515. Thanks @puneetmatharu
• MongoDB sink improvements #2519. Thanks @sandorzm
• Fix shadow warning in dist_sink #2431. Thanks @MohammadKanan for reporting.
• Fixed msvc warning C4800 in win_eventlog_sink
• Check IsDebuggerPresent() in msvc_sink before doing actual work #2408. To use old behavior pass false to the msvc_sink constructor. Thanks @DominikGrabiec and @sylveon

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