Cargo Features

wasmtime-wiggle = { version = "0.27.0", default-features = false, features = ["async", "wiggle_metadata", "tracing_log"] }
async default

Async support for wasmtime

Enables async of wasmtime ^0.27.0 and wasmtime-wiggle-macro

wiggle_metadata default = witx

The wiggle proc-macro emits some code (inside pub mod metadata) guarded by the wiggle_metadata feature flag. We use this feature flag so that users of wiggle are not forced to take a direct dependency on the witx crate unless they want it.

Enables wiggle_metadata of wiggle ^0.27.0


The tracing crate can use the log ecosystem of backends with this non-default feature. We don't need to provide this by default, but its useful for users that don't want to use tracing-subscriber to get the logs out of wiggle-generated libraries.

Enables tracing_log of wiggle ^0.27.0

default = async, wiggle_metadata

These default features are set whenever wasmtime-wiggle is added without default-features = false somewhere in the dependency tree.

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

witx wiggle_metadata