fix: picotool attribute needs unsafe

[chaosprint]

No description provided.

[bigbass1997]

Just encountered this issue as well, nice to see a PR already open for it.

For reference, Rust v1.82 introduced the ability to mark some attributes as unsafe. When using edition 2024 (as this template does), failure to properly mark unsafe attributes such as link_section, will produce a compiler error.

[yutannihilation]

I also hit this error.

Btw, why doesn't this get caught by the CI? It should be easily reproducible, but I found no compile error on GitHub Actions.

https://github.com/rp-rs/rp235x-project-template/actions

[yutannihilation]

Ah, okay, I found the reason. This template uses edition 2021, not edition 2024.

rp235x-project-template/Cargo.toml

Lines 1 to 2 in 0e0eadc

	[package]
	edition = "2021"

But, it seems cargo generate, which we are supposed to use according to the README, generates a Cargo.toml with edition 2024.

[9names]

This fix was integrated into #5, closing as resolved