Log Message:
spdlog: Update to 1.6.1

Changelog:
1.6.1
    Fixed deadlock in daily_file_sink that happened while cleaning older files. \ 
Thanks @IIFE for reporting(#1570) and for fixing(#1571).

    Fixed ringbuffer_sink::last_raw() and ringbuffer_sink::last_formatted() that \ 
didn't return latest elements. Thanks @vekkuli for reporting and fixing (#1563).

    Fixed missing symbol wstr_to_utf8buf(..) in windows dll build. Thanks \ 
@haquocviet for reporting (#1569).

    Bumped bundled fmt to version 6.2.1.

1.6.0
What's new

    Load log levels from environment variable SPDLOG_LEVEL :

#include "spdlog/cfg/env.h"
...
spdlog::cfg::load_env_levels();

$ # set log level to debug
$  SPDLOG_LEVEL=debug && ./example

$ # set to info except for mylogger which is set to trace:
$ SPDLOG_LEVEL=info,mylogger=trace  && ./example

$ # turn off all logging except for mylogger which is set to debug::
$ SPDLOG_LEVEL=off,mylogger=debug && ./example

    Load log levels from argv (e.g. ./example SPDLOG_LEVEL=debug):

#include "spdlog/cfg/argv.h"
...
spdlog::cfg::load_argv_levels(argc, argv);

    New windows eventlog sink . Thanks @ban-dana (#1418).

    New tcp sink that sends log messages in tcp to a remote server. Thanks \ 
@Proheeler (#1426).

    Extend spdlog with your own flags in the log pattern. See wiki for details.

    Support for building spdlog as dll under windows. Thanks vejmartin (#1467, \ 
3b73278, 5b3a183).

    Bump the bundled fmt version to 6.2.0 .

Fixes and Improvements

    Prevent race condition when SPDLOG_PREVENT_CHILD_FD is defined. Thanks \ 
@dominicpoeschko (#1423).

    Fix race condition in the filename() function in the file sinks. Thanks \ 
@tt4g (#1430, #1431).

    Fix ansicolor_sink::set_color(..) - can cause memory violation if user \ 
provides a custom color code that points to stack memory (#1540, 0b36d4e). \ 
Thanks @caizongchao for reporting.

    Fix potential buffer overflow in color_sinks if creating multiple color \ 
sinks in the same logger and one of them has a pattern without color flags \ 
(#1452, 64de880). Thanks @dominicpoeschko for reporting.

    Optimize cases when string_view is passed to the logger to avoid unnecessary \ 
fmt::format. Thanks dominicpoeschko (#1424) .

    Support for max files in daily logger - delete oldest files after creating \ 
the daily file. Thanks @ruoshui1314 (#1394).

    Fix deprecated warning with C++14 and external fmt lib (#1439). Thanks \ 
@ClausKlein for reporting.

    Optimize colos sinks to use std::array instead of map to find color codes \ 
(695912c, 4b7c059). Thanks @qis for the suggestion.

    Fix Win32 event log sink compilation. Thanks @Crunkle (#1444).

    Don't include windows.h in common.h. Thanks @ghost (#1453).

    Resolve erroneous clang-tidy warning about using a moved from pointer. \ 
Thanks @Ruffel (#1457).

    Fixed numerous clang-tidy warnings.

    Added options to to_hex to output hex like hexdump. Thanks @ngugcx (#1472).

    Fix Windows setenv check. Thanks @Crunkle (#1475).

    Removed the 'SPDLOG_NO_NAME` macro in tweakme.h and cmake.

    Added a forward declaration header spdlog\fwd.h . Thanks @horenmar for the \ 
suggestion (#1481).

    Moved throw to dedicated function to optimize compile-time and \ 
runtime-performance. Thanks @horenmar for the suggestion (#1483).

    Fix a build issue when SPDLOG_PREVENT_CHILD_FD is defined. Thanks @Naios (#1487).

    Fix issue with using external fmt (#1480). Thanks @nalinigans for reporting.

    Minor performance optimizations in pattern formatter (ca9c83f, 76389e0, \ 
7766bc2, d38bd13)

    Fixed on Android compilation #1527. Thanks @Bizyroth for reporting.

    Add log function to the logger API to allow logging with custom timepoint. \ 
#1521 - Thanks @ron003 .

    Fix missing exported symbol when building spdlog.dll in windows (#1535, \ 
348c438). Thanks @plmzod for reporting.

    Dropped meson support.

    Fix typos and tabs in the code. Thanks @waywardmonkeys (#1536) .

    CMake: Fix GNUInstallDirs include location Thanks @vitlav (#1407).

    CMake: workaround for Unknown extension ".c" for file issue . \ 
Thanks @niamster (#1442).

    CMake: Support CPack RPM generation. Thanks @tcraigtyler (#1451).

    CMake: Disabled extra warnings generation by default. Use \ 
SPDLOG_BUILD_WARNINGS=ON to enable again. Thanks @Glamhoth (#1503 02802af, \ 
6440733, 1f7f1c1)

    CMake: Support for precompiled headers with SPDLOG_ENABLE_PCH flag. Thanks \ 
@OlivierLDff (#1484).

    CMake: Add /WX MSVC compiler option for only if mscv compiler is used. \ 
Thanks @trondhe (#1495).

    CMake: Set minimum version of fmt to 5.3.0. Thanks @Montellese (#1525).

    CMake: Fix tabs, whitespaces and eol. Thanks @waywardmonkeys (#1537).

    Tests: removed duplicate entry for count_lines(). Thanks @emmenlau (#1417).

    Tests: don't run spdlog-utests and spdlog-utests-ho in parallel. Thanks \ 
@tt4g (#1421).

    Tests: Enable running the tests against an installed copy of spdlog. Thanks \ 
@mr-c (#1422).

    Tests: Support empty SPDLOG_EOL. Thanks @emmenlau (#1414).

    README: add conda as a supported package manager . Thanks @avrahamshukron \ 
(#1473).

    README: Replace yaourt with yay` pacakge manage for archlinux. Thanks \ 
@zyansheep (#1494).