Fix compiling some rustc crates to wasm #54024
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I was dabbling recently seeing what it would take to compile `rustfmt` to the `wasm32-unknown-unknown` target and it turns out not much effort is needed! Currently `rustfmt` depends on a few rustc crates published to crates.io, so this commit touches up those crates to compile for wasm themselves. Notably: * The `rustc_data_structures` crate's `flock` implementation is stubbed out to unconditionally return errors on unsupported platforms. * The `rustc_errors` crate is extended to not do any locking for all non-windows platforms. In both of these cases if we port the compiler to new platforms the functionality isn't critical but will be discovered over time as it comes up, so this hopefully doesn't make it too too hard to compile to new platforms!
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…rochenkov Fix compiling some rustc crates to wasm I was dabbling recently seeing what it would take to compile `rustfmt` to the `wasm32-unknown-unknown` target and it turns out not much effort is needed! Currently `rustfmt` depends on a few rustc crates published to crates.io, so this commit touches up those crates to compile for wasm themselves. Notably: * The `rustc_data_structures` crate's `flock` implementation is stubbed out to unconditionally return errors on unsupported platforms. * The `rustc_errors` crate is extended to not do any locking for all non-windows platforms. In both of these cases if we port the compiler to new platforms the functionality isn't critical but will be discovered over time as it comes up, so this hopefully doesn't make it too too hard to compile to new platforms!
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…rochenkov Fix compiling some rustc crates to wasm I was dabbling recently seeing what it would take to compile `rustfmt` to the `wasm32-unknown-unknown` target and it turns out not much effort is needed! Currently `rustfmt` depends on a few rustc crates published to crates.io, so this commit touches up those crates to compile for wasm themselves. Notably: * The `rustc_data_structures` crate's `flock` implementation is stubbed out to unconditionally return errors on unsupported platforms. * The `rustc_errors` crate is extended to not do any locking for all non-windows platforms. In both of these cases if we port the compiler to new platforms the functionality isn't critical but will be discovered over time as it comes up, so this hopefully doesn't make it too too hard to compile to new platforms!
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Rollup of 8 pull requests Successful merges: - #53218 (Add a implementation of `From` for converting `&'a Option<T>` into `Option<&'a T>`) - #54024 (Fix compiling some rustc crates to wasm) - #54095 (Rename all mentions of `nil` to `unit`) - #54173 (Suggest valid crate type if invalid crate type is found) - #54194 (Remove println!() statement from HashMap unit test) - #54203 (Fix the stable release of os_str_str_ref_eq) - #54207 (re-mark the never docs as unstable) - #54210 (Update Cargo) Failed merges: r? @ghost
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I was dabbling recently seeing what it would take to compile
rustfmtto thewasm32-unknown-unknowntarget and it turns out not much effort is needed!Currently
rustfmtdepends on a few rustc crates published to crates.io, sothis commit touches up those crates to compile for wasm themselves. Notably:
rustc_data_structurescrate'sflockimplementation is stubbed out tounconditionally return errors on unsupported platforms.
rustc_errorscrate is extended to not do any locking for all non-windowsplatforms.
In both of these cases if we port the compiler to new platforms the
functionality isn't critical but will be discovered over time as it comes up, so
this hopefully doesn't make it too too hard to compile to new platforms!