fix/issue-3101: fix the issue where mdc ignores SPDLOG_NO_TLS

[Allen-20180115]

Compared to the previous PR, additional testing details have been added.

Test results of the original v1.x branch code:

compilation steps:

$ git clone git@github.com:Allen-20180115/spdlog.git
$ cd spdlog && mkdir build && cd build
$ cmake .. -DSPDLOG_BUILD_EXAMPLE=ON -DSPDLOG_NO_TLS=ON
$ make
$ cd example
$ ./example

test result:

allen@allen:~/mytest/spdlog/build/example$ ./example 
[2024-09-11 16:49:41.804] [info] Welcome to spdlog version 1.14.1  !
[2024-09-11 16:49:41.804] [warning] Easy padding in numbers like 00000012
[2024-09-11 16:49:41.804] [critical] Support for int: 42;  hex: 2a;  oct: 52; bin: 101010
[2024-09-11 16:49:41.804] [info] Support for floats 1.23
[2024-09-11 16:49:41.804] [info] Positional args are supported too..
[2024-09-11 16:49:41.804] [info]    right aligned, left     aligned
[2024-09-11 16:49:41.804] [debug] This message should be displayed..
[16:49:41 +08:00] [I] [thread 25864] This an info message with custom format
[2024-09-11 16:49:41.805] [info] ****************** Backtrace Start ******************
[2024-09-11 16:49:41.805] [debug] Backtrace message 90
[2024-09-11 16:49:41.805] [debug] Backtrace message 91
[2024-09-11 16:49:41.805] [debug] Backtrace message 92
[2024-09-11 16:49:41.805] [debug] Backtrace message 93
[2024-09-11 16:49:41.805] [debug] Backtrace message 94
[2024-09-11 16:49:41.805] [debug] Backtrace message 95
[2024-09-11 16:49:41.805] [debug] Backtrace message 96
[2024-09-11 16:49:41.805] [debug] Backtrace message 97
[2024-09-11 16:49:41.805] [debug] Backtrace message 98
[2024-09-11 16:49:41.805] [debug] Backtrace message 99
[2024-09-11 16:49:41.805] [info] ****************** Backtrace End ********************
[2024-09-11 16:49:41.808] [info] Binary example: 
0000: 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
0020: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
0040: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
[2024-09-11 16:49:41.808] [info] Another binary example:00 01 02 03 04 05 06 07 08 09
[2024-09-11 16:49:41.808] [info] Vector example: [1, 2, 3]
[multi_sink_example] [warning] this should appear in both console and file
[2024-09-11 16:49:41.808] [info] user defined type: [my_type i=14]
[2024-09-11 16:49:41.931] [info] Stopwatch: 0.123096335 seconds
[2024-09-11 16:49:41.931] [info] Before opening logs/events-sample.txt
[2024-09-11 16:49:41.931] [info] After opening logs/events-sample.txt
[2024-09-11 16:49:41.931] [info] Before closing logs/events-sample.txt
[2024-09-11 16:49:41.931] [info] After closing logs/events-sample.txt
[16:49:41 +08:00] [I] [key1:value1 key2:value2] Some log message with context
[16:49:41 +08:00] [I] [key1:value1 key2:value2] End of example.
[16:49:41 +08:00] [I] [key1:value1 key2:value2] End of example.

PR branch code test results:

compilation steps:

$ git clone git@github.com:Allen-20180115/spdlog.git
$ cd spdlog && mkdir build2 && cd build2
$ cmake .. -DSPDLOG_BUILD_EXAMPLE=ON -DSPDLOG_NO_TLS=ON
$ make
$ cd example
$ ./example

test result:

allen@allen:~/mytest/spdlog/build2/example$ ./example 
[2024-09-12 19:26:54.801] [info] Welcome to spdlog version 1.14.1  !
[2024-09-12 19:26:54.801] [warning] Easy padding in numbers like 00000012
[2024-09-12 19:26:54.802] [critical] Support for int: 42;  hex: 2a;  oct: 52; bin: 101010
[2024-09-12 19:26:54.802] [info] Support for floats 1.23
[2024-09-12 19:26:54.802] [info] Positional args are supported too..
[2024-09-12 19:26:54.802] [info]    right aligned, left     aligned
[2024-09-12 19:26:54.802] [debug] This message should be displayed..
[19:26:54 +08:00] [I] [thread 26706] This an info message with custom format
[2024-09-12 19:26:54.802] [info] ****************** Backtrace Start ******************
[2024-09-12 19:26:54.802] [debug] Backtrace message 90
[2024-09-12 19:26:54.802] [debug] Backtrace message 91
[2024-09-12 19:26:54.802] [debug] Backtrace message 92
[2024-09-12 19:26:54.802] [debug] Backtrace message 93
[2024-09-12 19:26:54.802] [debug] Backtrace message 94
[2024-09-12 19:26:54.802] [debug] Backtrace message 95
[2024-09-12 19:26:54.802] [debug] Backtrace message 96
[2024-09-12 19:26:54.802] [debug] Backtrace message 97
[2024-09-12 19:26:54.802] [debug] Backtrace message 98
[2024-09-12 19:26:54.802] [debug] Backtrace message 99
[2024-09-12 19:26:54.802] [info] ****************** Backtrace End ********************
[2024-09-12 19:26:54.803] [info] Binary example: 
0000: 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
0020: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
0040: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
[2024-09-12 19:26:54.803] [info] Another binary example:00 01 02 03 04 05 06 07 08 09
[2024-09-12 19:26:54.803] [info] Vector example: [1, 2, 3]
[multi_sink_example] [warning] this should appear in both console and file
[2024-09-12 19:26:54.803] [info] user defined type: [my_type i=14]
[2024-09-12 19:26:54.927] [info] Stopwatch: 0.123242379 seconds
[2024-09-12 19:26:54.927] [info] Before opening logs/events-sample.txt
[2024-09-12 19:26:54.927] [info] After opening logs/events-sample.txt
[2024-09-12 19:26:54.927] [info] Before closing logs/events-sample.txt
[2024-09-12 19:26:54.927] [info] After closing logs/events-sample.txt
[2024-09-12 19:26:54.927] [info] End of example.
[2024-09-12 19:26:54.927] [console] [info] End of example.

Please note the output results on the end of line. At this point, calling mdc_example() does not ignore the compiler option SPDLOG_NO_TLS

[gabime]

Thanks @Allen-20180115. Merged.