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authorbors <bors@rust-lang.org>2024-04-19 03:35:10 +0000
committerbors <bors@rust-lang.org>2024-04-19 03:35:10 +0000
commit13e63f7490109eecf905fa51190eacbe8051aefd (patch)
treeea23b3678bef0d72a2ce450bdedc90ed7d7b7327 /compiler/rustc_trait_selection/src/errors.rs
parentfa0068b5412baecc932772dda72c0621bfa7ab00 (diff)
parent9e2c65893dcf5e8da2fc7cd25af94ba3233e9c51 (diff)
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Auto merge of #117919 - daxpedda:wasm-c-abi, r=wesleywiser
Introduce perma-unstable `wasm-c-abi` flag

Now that `wasm-bindgen` v0.2.88 supports the spec-compliant C ABI, the idea is to switch to that in a future version of Rust. In the meantime it would be good to let people test and play around with it.

This PR introduces a new perma-unstable `-Zwasm-c-abi` compiler flag, which switches to the new spec-compliant C ABI when targeting `wasm32-unknown-unknown`.

Alternatively, we could also stabilize this and then deprecate it when we switch. I will leave this to the Rust maintainers to decide.

This is a companion PR to #117918, but they could be merged independently.
MCP: https://github.com/rust-lang/compiler-team/issues/703
Tracking issue: https://github.com/rust-lang/rust/issues/122532
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