Document Wasm target_feature = "gc"
#2114
Draft
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
rustbot
added
the
S-waiting-on-review
rustbot
removed
the
S-waiting-on-review
ehuss
added
the
S-waiting-on-stabilization
bors
added a commit
to rust-lang/rust
that referenced
this pull request
Dec 19, 2025
Add `target_feature = "gc"` for Wasm This PR adds a new target feature for Wasm targets: [GC](https://github.com/WebAssembly/gc). ~~I went ahead and made this insta-stable because it has already [passed phase 5](https://github.com/WebAssembly/proposals/blob/88e7bd6ba9bc585135edcb4def2c4d284f5fd0fc/finished-proposals.md) in addition to being [implemented and stabilized by all major JS engines](https://webassembly.org/features).~~ ~~This doesn't enable the target feature by default!~~ For context: while this proposal adds a lot of new features to Wasm, they are not accessible through Rust apart from unstable inline ASM. This is largely useful to signal tools to make use of the feature, e.g. `wasm-bindgen`, where this can be used to make some pretty optimizations. Companion PR: rust-lang/reference#2114. r? `@alexcrichton`
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Companion PR to rust-lang/rust#150111.