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Rollup merge of #97971 - Soveu:varargs, r=jackh726

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Enable varargs support for calling conventions other than C or cdecl

This patch makes it possible to use varargs for calling conventions,
which are either based on C (efiapi) or C is based on them (sysv64 and win64).

Also pinging ``@phlopsi,`` because he noticed first this oversight when writing a library for UEFI.
This commit is contained in:
Michael Howell 2022-10-30 19:31:36 -07:00 • committed by GitHub
commit 9911229650
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12 changed files with 174 additions and 35 deletions
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3
compiler/rustc_feature/src/active.rs
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@ -388,6 +388,9 @@ declare_features! (
(active, exclusive_range_pattern, "1.11.0", Some(37854), None),
/// Allows exhaustive pattern matching on types that contain uninhabited types.
(active, exhaustive_patterns, "1.13.0", Some(51085), None),
/// Allows using `efiapi`, `sysv64` and `win64` as calling convention
/// for functions with varargs.
(active, extended_varargs_abi_support, "1.65.0", Some(100189), None),
/// Allows defining `extern type`s.
(active, extern_types, "1.23.0", Some(43467), None),
/// Allows the use of `#[ffi_const]` on foreign functions.