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This commit is contained in:
Alex Crichton 2024-08-02 06:59:45 -07:00
parent a5082ef5a8
commit 06197ef3c1
4 changed files with 20 additions and 8 deletions
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4
src/doc/rustc/src/platform-support/wasm32-unknown-unknown.md
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@ -141,7 +141,7 @@ Rust standard library additionally must be recompiled.
Compiling all code for the initial release of WebAssembly looks like:
```sh
$ export RUSTFLAG=-Ctarget-cpu=mvp
$ export RUSTFLAGS=-Ctarget-cpu=mvp
$ cargo +nightly build -Zbuild-std=panic_abort,std --target wasm32-unknown-unknown
```
@ -166,7 +166,7 @@ about the supported WebAssembly features the engine has.
Note that it is still possible for Rust crates and libraries to enable
WebAssembly features on a per-function level. This means that the build
command above may not be sufficent to disable all WebAssembly features. If the
command above may not be sufficient to disable all WebAssembly features. If the
final binary still has SIMD instructions, for example, the function in question
will need to be found and the crate in question will likely contain something
like:

14
src/doc/rustc/src/platform-support/wasm32-wasip1-threads.md
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@ -162,3 +162,17 @@ It's recommended to conditionally compile code for this target with:
Prior to Rust 1.80 the `target_env = "p1"` key was not set. Currently the
`target_feature = "atomics"` is Nightly-only. Note that the precise `#[cfg]`
necessary to detect this target may change as the target becomes more stable.
## Enabled WebAssembly features
The default set of WebAssembly features enabled for compilation is similar to
[`wasm32-unknown-unknokwn`](./wasm32-unknown-unknown.md) but two more features
are included:
* `bulk-memory`
* `atomics`
For more information about features see the documentation for
[`wasm32-unknown-unknokwn`](./wasm32-unknown-unknown.md), but note that the
`mvp` CPU in LLVM does not support this target as it's required that
`bulk-memory`, `atomics`, and `mutable-globals` are all enabled.

5
src/doc/rustc/src/platform-support/wasm32-wasip1.md
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@ -136,6 +136,5 @@ to Rust 1.80 the `target_env` condition was not set.
## Enabled WebAssembly features
The default set of WebAssembly features enabled for compilation is currently the
same across all WebAssembly targets. For more information on WebAssembly
features see the documentation for
[`wasm32-unknown-unknokwn`](./wasm32-unknown-unknown.md)
same as [`wasm32-unknown-unknokwn`](./wasm32-unknown-unknown.md). See the
documentation there for more information.

5
src/doc/rustc/src/platform-support/wasm32-wasip2.md
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@ -65,6 +65,5 @@ It's recommended to conditionally compile code for this target with:
## Enabled WebAssembly features
The default set of WebAssembly features enabled for compilation is currently the
same across all WebAssembly targets. For more information on WebAssembly
features see the documentation for
[`wasm32-unknown-unknokwn`](./wasm32-unknown-unknown.md)
same as [`wasm32-unknown-unknokwn`](./wasm32-unknown-unknown.md). See the
documentation there for more information.