core: fix warnings when compiling without std
#2022
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Signed-off-by: Eliza Weisman <eliza@buoyant.io>
Signed-off-by: Eliza Weisman <eliza@buoyant.io>
davidbarsky
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Mar 25, 2022
hawkw
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Apr 1, 2022
# 0.1.24 (April 1, 2022) This release fixes a bug where setting `NoSubscriber` as the local default would not locally disable the current global default subscriber. ### Fixed - Setting `NoSubscriber` as the local default now correctly disables the global default subscriber ([#2001]) - Fixed compilation warnings with the "std" feature disabled ([#2022]) ### Changed - Removed unnecessary use of `write!` and `format_args!` macros ([#1988]) [#1988]: #1988 [#2001]: #2001 [#2022]: #2022
hawkw
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Apr 1, 2022
# 0.1.24 (April 1, 2022) This release fixes a bug where setting `NoSubscriber` as the local default would not locally disable the current global default subscriber. ### Fixed - Setting `NoSubscriber` as the local default now correctly disables the global default subscriber ([#2001]) - Fixed compilation warnings with the "std" feature disabled ([#2022]) ### Changed - Removed unnecessary use of `write!` and `format_args!` macros ([#1988]) [#1988]: #1988 [#2001]: #2001 [#2022]: #2022
kaffarell
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May 22, 2024
Currently, compiling `tracing-core` with `default-features = false` (i.e. for `no_std` targets) emits a few warnings. This is due to the spinlock implementation's use of the deprecated `atomic::spin_loop_hint` function (renamed to `hint::spin_loop`), and the use of deprecated `compare_and_swap` instead of `compare_exchange` methods. Now that our MSRV is 1.49 (the version in which `hint::spin_loop` was stabilized), we can fix these warnings. This branch replaces the deprecated APIs. Also, I noticed that one of the tests emits unused-imports warnings with `--no-default-features`. This is because the actual tests are feature flagged to require `std`, but the module itself doesn't, so the imports are just hanging out and not getting used for anything. I went ahead and fixed that as well. Signed-off-by: Eliza Weisman <eliza@buoyant.io>
kaffarell
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May 22, 2024
# 0.1.24 (April 1, 2022) This release fixes a bug where setting `NoSubscriber` as the local default would not locally disable the current global default subscriber. ### Fixed - Setting `NoSubscriber` as the local default now correctly disables the global default subscriber ([tokio-rs#2001]) - Fixed compilation warnings with the "std" feature disabled ([tokio-rs#2022]) ### Changed - Removed unnecessary use of `write!` and `format_args!` macros ([tokio-rs#1988]) [tokio-rs#1988]: tokio-rs#1988 [tokio-rs#2001]: tokio-rs#2001 [tokio-rs#2022]: tokio-rs#2022
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Motivation
Currently, compiling
tracing-corewithdefault-features = false(i.e. for
no_stdtargets) emits a few warnings. This is due to thespinlock implementation's use of the deprecated
atomic::spin_loop_hintfunction (renamed to
hint::spin_loop), and the use of deprecatedcompare_and_swapinstead ofcompare_exchangemethods. Now that ourMSRV is 1.49 (the version in which
hint::spin_loopwas stabilized), wecan fix these warnings.
Solution
This branch replaces the deprecated APIs.
Also, I noticed that one of the tests emits unused-imports warnings with
--no-default-features. This is because the actual tests are featureflagged to require
std, but the module itself doesn't, so the importsare just hanging out and not getting used for anything. I went ahead and
fixed that as well.