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Support #[unix_sigpipe = "inherit|sig_dfl|sig_ign"] on fn main()

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This makes it possible to instruct libstd to never touch the signal
handler for `SIGPIPE`, which makes programs pipeable by default (e.g.
with `./your-program | head -n 1`) without `ErrorKind::BrokenPipe`
errors.
This commit is contained in:
Martin Nordholts 2022-07-05 19:56:22 +02:00
parent ee285eab69
commit ddee45e1d7
46 changed files with 449 additions and 43 deletions
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2
compiler/rustc_feature/src/active.rs
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@ -519,6 +519,8 @@ declare_features! (
/// Allows creation of instances of a struct by moving fields that have
/// not changed from prior instances of the same struct (RFC #2528)
(active, type_changing_struct_update, "1.58.0", Some(86555), None),
/// Enables rustc to generate code that instructs libstd to NOT ignore SIGPIPE.
(active, unix_sigpipe, "CURRENT_RUSTC_VERSION", Some(97889), None),
/// Allows unsized fn parameters.
(active, unsized_fn_params, "1.49.0", Some(48055), None),
/// Allows unsized rvalues at arguments and parameters.