portable-atomic support for alloc::sync in tracing-core

[edisno]

Feature Request

I want to use bevy_reflect on no_std rp2040. This platform has alloc, but not atomics, so alloc::sync is missing. bevy_relflect has a hard depency on tracing, and I'd like to use tracing on this platform also.

Crates

tracing-core
portable-atomic
bevy_reflect

Motivation

Want to use tracing-core on no_std rp2040 without hardware atomics

Proposal

Since alloc::sync is missing on some no_std platforms, and the "portable-atomic" crate is a drop-in replacement for alloc::sync, integrate portable-atomic.

Alternatives

None that I know of.