Add `target_env = "macabi"` and `target_env = "sim"` #139451

madsmtm · 2025-04-06T14:28:33Z

RFC 2992 (tracking issue) introduced cfg(target_abi = ...) with the original motivation being Mac Catalyst and Apple Simulator targets. These do not actually have a changed calling convention in the same sense that e.g. cfg(target_abi = "eabihf") or pointer authentication (arm64e) does, see #133331.

Specifically, for Apple Simulator targets, the binary runs under the following conditions:

Runs with the host macOS kernel (but in a mode configured for iOS/tvOS/...).
Uses frameworks for the specific simulator version being targetted.
System file accesses need to be made relative to the IPHONE_SIMULATOR_ROOT environment variable.
Uses host GPUs directly.

And for Mac Catalyst:

Runs with the host macOS kernel (but in a mode configured for iOS).
Uses mostly host macOS frameworks (though with a few things changed, e.g. the NSImageResizingModeStretch enum has a different value).
Uses host GPUs, camera and other peripherals directly.

As can be seen, these seem better suited as target_envs, since it really is the environment that the binary is running under that's changed (regardless of the Mac Catalyst "macabi" having "abi" in the name). So this PR adds target_env = "sim" and target_env = "macabi", with the idea of possibly deprecating target_abi = "sim" and target_abi = "macabi" in the far future.

This affects iOS Tier 2 targets (aarch64-apple-ios-sim, x86_64-apple-ios, aarch64-apple-ios-macabi and x86_64-apple-ios-macabi), and probably needs a compiler FCP.

Fixes #133331.
Reference PR: rust-lang/reference#1781.
Cargo doc PR: rust-lang/cargo#15404.

r? compiler
CC @workingjubilee
CC target maintainers @deg4uss3r @thomcc @badboy @BlackHoleFox @madsmtm @agg23

rustbot · 2025-04-06T14:28:41Z

These commits modify compiler targets.
(See the Target Tier Policy.)

Some changes occurred in src/doc/rustc/src/platform-support

cc @Noratrieb

Some changes occurred in compiler/rustc_codegen_ssa

cc @WaffleLapkin

Some changes occurred in src/tools/compiletest

cc @jieyouxu

compiler/rustc_target/src/spec/base/apple/tests.rs

`target_abi = "sim"` may be deprecated in the future. See rust-lang/rust#139451.

SparrowLii

It looks fine, but I'm not familar with target options so
r? @workingjubilee since this is from #133331

workingjubilee · 2025-04-08T22:42:43Z

Hm. Reviewing https://github.com/rust-lang/rust-forge/blob/master/src/compiler/proposals-and-stabilization.md#targets this is an unspecified case for approving changes to targets, cc @davidtwco and @wesleywiser

But it is user-facing, I suppose, so an FCP does make sense. Tentatively applying labels assuming that is correct.

apiraino · 2025-04-10T09:40:42Z

I'm also not very familiar with target options but I feel that target_env = "sim" is a bit generic. Would it make sense something that says more explicitly that this is an Apple thing? Example target_env = "ios-sim" or something along this line?

wesleywiser · 2025-04-10T14:17:04Z

Yes, I think an FCP is appropriate for this change.

@rfcbot fcp merge

rfcbot · 2025-04-10T14:17:07Z

bors · 2025-08-08T09:58:27Z

☔ The latest upstream changes (presumably #145077) made this pull request unmergeable. Please resolve the merge conflicts.

madsmtm · 2025-08-08T11:50:56Z

Rebased (conflict was in tests/ui/check-cfg/well-known-values.stderr).

@bors r=wesleywiser

bors · 2025-08-08T11:50:58Z

📌 Commit d434cae has been approved by wesleywiser

It is now in the queue for this repository.

Rollup of 8 pull requests Successful merges: - #139451 (Add `target_env = "macabi"` and `target_env = "sim"`) - #144039 (Use `tcx.short_string()` in more diagnostics) - #144192 (atomicrmw on pointers: move integer-pointer cast hacks into backend) - #144545 (In rustc_pattern_analysis, put `true` witnesses before `false` witnesses) - #144579 (Implement declarative (`macro_rules!`) attribute macros (RFC 3697)) - #144649 (Account for bare tuples and `Pin` methods in field searching logic) - #144775 (more strongly dissuade use of `skip_binder`) - #144987 (Enable f16 and f128 on targets that were fixed in LLVM21) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of #139451 - madsmtm:apple-target-env-abi, r=wesleywiser Add `target_env = "macabi"` and `target_env = "sim"` [RFC 2992](rust-lang/rfcs#2992) ([tracking issue](#80970)) introduced `cfg(target_abi = ...)` with the original motivation being Mac Catalyst and Apple Simulator targets. These do not actually have a changed calling convention in the same sense that e.g. `cfg(target_abi = "eabihf")` or pointer authentication (`arm64e`) does, see #133331. Specifically, for Apple Simulator targets, the binary runs under the following conditions: - Runs with the host macOS kernel (but in a mode configured for iOS/tvOS/...). - Uses frameworks for the specific simulator version being targetted. - System file accesses need to be made relative to the `IPHONE_SIMULATOR_ROOT` environment variable. - Uses host GPUs directly. And for Mac Catalyst: - Runs with the host macOS kernel (but in a mode configured for iOS). - Uses mostly host macOS frameworks (though with a few things changed, e.g. the [`NSImageResizingModeStretch`](https://developer.apple.com/documentation/appkit/nsimage/resizingmode-swift.enum/stretch?language=objc) enum has a different value). - Uses host GPUs, camera and other peripherals directly. As can be seen, these seem better suited as `target_env`s, since it really is the environment that the binary is running under that's changed (regardless of the Mac Catalyst "macabi" having "abi" in the name). So this PR adds `target_env = "sim"` and `target_env = "macabi"`, with the idea of possibly deprecating `target_abi = "sim"` and `target_abi = "macabi"` in the far future. This affects iOS Tier 2 targets (`aarch64-apple-ios-sim`, `x86_64-apple-ios`, `aarch64-apple-ios-macabi` and `x86_64-apple-ios-macabi`), and probably needs a compiler FCP. Fixes #133331. Reference PR: rust-lang/reference#1781. Cargo doc PR: rust-lang/cargo#15404. r? compiler CC `@workingjubilee` CC target maintainers `@deg4uss3r` `@thomcc` `@badboy` `@BlackHoleFox` `@madsmtm` `@agg23`

Rollup of 8 pull requests Successful merges: - rust-lang/rust#139451 (Add `target_env = "macabi"` and `target_env = "sim"`) - rust-lang/rust#144039 (Use `tcx.short_string()` in more diagnostics) - rust-lang/rust#144192 (atomicrmw on pointers: move integer-pointer cast hacks into backend) - rust-lang/rust#144545 (In rustc_pattern_analysis, put `true` witnesses before `false` witnesses) - rust-lang/rust#144579 (Implement declarative (`macro_rules!`) attribute macros (RFC 3697)) - rust-lang/rust#144649 (Account for bare tuples and `Pin` methods in field searching logic) - rust-lang/rust#144775 (more strongly dissuade use of `skip_binder`) - rust-lang/rust#144987 (Enable f16 and f128 on targets that were fixed in LLVM21) r? `@ghost` `@rustbot` modify labels: rollup

rust-lang/rust#139451 updated the sim/macabi to be env instead of abi

Rollup of 8 pull requests Successful merges: - rust-lang#139451 (Add `target_env = "macabi"` and `target_env = "sim"`) - rust-lang#144039 (Use `tcx.short_string()` in more diagnostics) - rust-lang#144192 (atomicrmw on pointers: move integer-pointer cast hacks into backend) - rust-lang#144545 (In rustc_pattern_analysis, put `true` witnesses before `false` witnesses) - rust-lang#144579 (Implement declarative (`macro_rules!`) attribute macros (RFC 3697)) - rust-lang#144649 (Account for bare tuples and `Pin` methods in field searching logic) - rust-lang#144775 (more strongly dissuade use of `skip_binder`) - rust-lang#144987 (Enable f16 and f128 on targets that were fixed in LLVM21) r? `@ghost` `@rustbot` modify labels: rollup

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [rust](https://github.com/rust-lang/rust) | minor | `1.90.0` -> `1.91.0` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>rust-lang/rust (rust)</summary> ### [`v1.91.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1910-2025-10-30) [Compare Source](rust-lang/rust@1.90.0...1.91.0) \========================== <a id="1.91.0-Language"></a> ## Language - [Lower pattern bindings in the order they're written and base drop order on primary bindings' order](rust-lang/rust#143764) - [Stabilize declaration of C-style variadic functions for `sysv64`, `win64`, `efiapi`, and `aapcs` ABIs](rust-lang/rust#144066). This brings these ABIs in line with the C ABI: variadic functions can be declared in extern blocks but not defined. - [Add `dangling_pointers_from_locals` lint to warn against dangling pointers from local variables](rust-lang/rust#144322) - [Upgrade `semicolon_in_expressions_from_macros` from warn to deny](rust-lang/rust#144369) - [Stabilize LoongArch32 inline assembly](rust-lang/rust#144402) - [Add warn-by-default `integer_to_ptr_transmutes` lint against integer-to-pointer transmutes](rust-lang/rust#144531) - [Stabilize `sse4a` and `tbm` target features](rust-lang/rust#144542) - [Add `target_env = "macabi"` and `target_env = "sim"` cfgs](rust-lang/rust#139451) as replacements for the `target_abi` cfgs with the same values. <a id="1.91.0-Compiler"></a> ## Compiler - [Don't warn on never-to-any `as` casts as unreachable](rust-lang/rust#144804) <a id="1.91.0-Platform-Support"></a> ## Platform Support - [Promote `aarch64-pc-windows-gnullvm` and `x86_64-pc-windows-gnullvm` to Tier 2 with host tools.](rust-lang/rust#143031) Note: llvm-tools and MSI installers are missing but will be added in future releases. - [Promote `aarch64-pc-windows-msvc` to Tier 1](rust-lang/rust#145682) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html <a id="1.91.0-Libraries"></a> ## Libraries - [Print thread ID in panic message](rust-lang/rust#115746) - [Fix overly restrictive lifetime in `core::panic::Location::file` return type](rust-lang/rust#132087) - [Guarantee parameter order for `_by()` variants of `min` / `max`/ `minmax` in `std::cmp`](rust-lang/rust#139357) - [Document assumptions about `Clone` and `Eq` traits](rust-lang/rust#144330) - [`std::thread`: Return error if setting thread stack size fails](rust-lang/rust#144210) This used to panic within the standard library. <a id="1.91.0-Stabilized-APIs"></a> ## Stabilized APIs - [`Path::file_prefix`](https://doc.rust-lang.org/stable/std/path/struct.Path.html#method.file_prefix) - [`AtomicPtr::fetch_ptr_add`](https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_ptr_add) - [`AtomicPtr::fetch_ptr_sub`](https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_ptr_sub) - [`AtomicPtr::fetch_byte_add`](https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_byte_add) - [`AtomicPtr::fetch_byte_sub`](https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_byte_sub) - [`AtomicPtr::fetch_or`](https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_or) - [`AtomicPtr::fetch_and`](https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_and) - [`AtomicPtr::fetch_xor`](https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_xor) - [`{integer}::strict_add`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_add) - [`{integer}::strict_sub`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_sub) - [`{integer}::strict_mul`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_mul) - [`{integer}::strict_div`](https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_div) - [`{integer}::strict_div_euclid`](https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_div_euclid) - [`{integer}::strict_rem`](https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_rem) - [`{integer}::strict_rem_euclid`](https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_rem_euclid) - [`{integer}::strict_neg`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_neg) - [`{integer}::strict_shl`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_shl) - [`{integer}::strict_shr`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_shr) - [`{integer}::strict_pow`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_pow) - [`i{N}::strict_add_unsigned`](https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_add_unsigned) - [`i{N}::strict_sub_unsigned`](https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_sub_unsigned) - [`i{N}::strict_abs`](https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_abs) - [`u{N}::strict_add_signed`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_add_signed) - [`u{N}::strict_sub_signed`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_sub_signed) - [`PanicHookInfo::payload_as_str`](https://doc.rust-lang.org/stable/std/panic/struct.PanicHookInfo.html#method.payload_as_str) - [`core::iter::chain`](https://doc.rust-lang.org/stable/core/iter/fn.chain.html) - [`u{N}::checked_signed_diff`](https://doc.rust-lang.org/stable/std/primitive.u16.html#method.checked_signed_diff) - [`core::array::repeat`](https://doc.rust-lang.org/stable/core/array/fn.repeat.html) - [`PathBuf::add_extension`](https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.add_extension) - [`PathBuf::with_added_extension`](https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.with_added_extension) - [`Duration::from_mins`](https://doc.rust-lang.org/stable/std/time/struct.Duration.html#method.from_mins) - [`Duration::from_hours`](https://doc.rust-lang.org/stable/std/time/struct.Duration.html#method.from_hours) - [`impl PartialEq<str> for PathBuf`](https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#impl-PartialEq%3Cstr%3E-for-PathBuf) - [`impl PartialEq<String> for PathBuf`](https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#impl-PartialEq%3CString%3E-for-PathBuf) - [`impl PartialEq<str> for Path`](https://doc.rust-lang.org/stable/std/path/struct.Path.html#impl-PartialEq%3Cstr%3E-for-Path) - [`impl PartialEq<String> for Path`](https://doc.rust-lang.org/stable/std/path/struct.Path.html#impl-PartialEq%3CString%3E-for-Path) - [`impl PartialEq<PathBuf> for String`](https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-PartialEq%3CPathBuf%3E-for-String) - [`impl PartialEq<Path> for String`](https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-PartialEq%3CPath%3E-for-String) - [`impl PartialEq<PathBuf> for str`](https://doc.rust-lang.org/stable/std/primitive.str.html#impl-PartialEq%3CPathBuf%3E-for-str) - [`impl PartialEq<Path> for str`](https://doc.rust-lang.org/stable/std/primitive.str.html#impl-PartialEq%3CPath%3E-for-str) - [`Ipv4Addr::from_octets`](https://doc.rust-lang.org/stable/std/net/struct.Ipv4Addr.html#method.from_octets) - [`Ipv6Addr::from_octets`](https://doc.rust-lang.org/stable/std/net/struct.Ipv6Addr.html#method.from_octets) - [`Ipv6Addr::from_segments`](https://doc.rust-lang.org/stable/std/net/struct.Ipv6Addr.html#method.from_segments) - [`impl<T> Default for Pin<Box<T>> where Box<T>: Default, T: ?Sized`](https://doc.rust-lang.org/stable/std/default/trait.Default.html#impl-Default-for-Pin%3CBox%3CT%3E%3E) - [`impl<T> Default for Pin<Rc<T>> where Rc<T>: Default, T: ?Sized`](https://doc.rust-lang.org/stable/std/default/trait.Default.html#impl-Default-for-Pin%3CRc%3CT%3E%3E) - [`impl<T> Default for Pin<Arc<T>> where Arc<T>: Default, T: ?Sized`](https://doc.rust-lang.org/stable/std/default/trait.Default.html#impl-Default-for-Pin%3CArc%3CT%3E%3E) - [`Cell::as_array_of_cells`](https://doc.rust-lang.org/stable/std/cell/struct.Cell.html#method.as_array_of_cells) - [`u{N}::carrying_add`](https://doc.rust-lang.org/stable/std/primitive.u64.html#method.carrying_add) - [`u{N}::borrowing_sub`](https://doc.rust-lang.org/stable/std/primitive.u64.html#method.borrowing_sub) - [`u{N}::carrying_mul`](https://doc.rust-lang.org/stable/std/primitive.u64.html#method.carrying_mul) - [`u{N}::carrying_mul_add`](https://doc.rust-lang.org/stable/std/primitive.u64.html#method.carrying_mul_add) - [`BTreeMap::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.BTreeMap.html#method.extract_if) - [`BTreeSet::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.BTreeSet.html#method.extract_if) - [`impl Debug for windows::ffi::EncodeWide<'_>`](https://doc.rust-lang.org/stable/std/os/windows/ffi/struct.EncodeWide.html#impl-Debug-for-EncodeWide%3C'_%3E) - [`str::ceil_char_boundary`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.ceil_char_boundary) - [`str::floor_char_boundary`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.floor_char_boundary) - [`impl Sum for Saturating<u{N}>`](https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Sum-for-Saturating%3Cu32%3E) - [`impl Sum<&Self> for Saturating<u{N}>`](https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Sum%3C%26Saturating%3Cu32%3E%3E-for-Saturating%3Cu32%3E) - [`impl Product for Saturating<u{N}>`](https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Product-for-Saturating%3Cu32%3E) - [`impl Product<&Self> for Saturating<u{N}>`](https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Product%3C%26Saturating%3Cu32%3E%3E-for-Saturating%3Cu32%3E) These previously stable APIs are now stable in const contexts: - [`<[T; N]>::each_ref`](https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_ref) - [`<[T; N]>::each_mut`](https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_mut) - [`OsString::new`](https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.new) - [`PathBuf::new`](https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.new) - [`TypeId::of`](https://doc.rust-lang.org/stable/std/any/struct.TypeId.html#method.of) - [`ptr::with_exposed_provenance`](https://doc.rust-lang.org/stable/std/ptr/fn.with_exposed_provenance.html) - [`ptr::with_exposed_provenance_mut`](https://doc.rust-lang.org/stable/std/ptr/fn.with_exposed_provenance_mut.html) <a id="1.91.0-Cargo"></a> ## Cargo - 🎉 Stabilize `build.build-dir`. This config sets the directory where intermediate build artifacts are stored. These artifacts are produced by Cargo and rustc during the build process. End users usually won't need to interact with them, and the layout inside `build-dir` is an implementation detail that may change without notice. ([config doc](https://doc.rust-lang.org/stable/cargo/reference/config.html#buildbuild-dir)) ([build cache doc](https://doc.rust-lang.org/stable/cargo/reference/build-cache.html)) [#15833](rust-lang/cargo#15833) [#15840](rust-lang/cargo#15840) - The `--target` flag and the `build.target` configuration can now take literal `"host-tuple"` string, which will internally be substituted by the host machine's target triple. [#15838](rust-lang/cargo#15838) [#16003](rust-lang/cargo#16003) [#16032](rust-lang/cargo#16032) <a id="1.91.0-Rustdoc"></a> ## Rustdoc - [In search results, rank doc aliases lower than non-alias items with the same name](rust-lang/rust#145100) - [Raw pointers now work in type-based search like references](rust-lang/rust#145731). This means you can now search for things like `*const u8 ->`, and additionally functions that take or return raw pointers will now display their signature properly in search results. <a id="1.91.0-Compatibility-Notes"></a> ## Compatibility Notes - [Always require coroutine captures to be drop-live](rust-lang/rust#144156) - [Apple: Always pass SDK root when linking with `cc`, and pass it via `SDKROOT` env var](rust-lang/rust#131477). This should fix linking issues with `rustc` running inside Xcode. Libraries in `/usr/local/lib` may no longer be linked automatically, if you develop or use a crate that relies on this, you should explicitly set `cargo::rustc-link-search=/usr/local/lib` in a `build.rs` script. - [Relaxed bounds in associated type bound position like in `TraitRef<AssocTy: ?Sized>` are now correctly forbidden](rust-lang/rust#135331) - [Add unstable `#[sanitize(xyz = "on|off")]` built-in attribute that shadows procedural macros with the same name](rust-lang/rust#142681) - [Fix the drop checker being more permissive for bindings declared with let-else](rust-lang/rust#143028) - [Be more strict when parsing attributes, erroring on many invalid attributes](rust-lang/rust#144689) - [Error on invalid `#[should_panic]` attributes](rust-lang/rust#143808) - [Error on invalid `#[link]` attributes](rust-lang/rust#143193) - [Mark all deprecation lints in name resolution as deny-by-default and also report in dependencies](rust-lang/rust#143929) - The lint `semicolon_in_expressions_from_macros`, for `macro_rules!` macros in expression position that expand to end in a semicolon (`;`), is now deny-by-default. It was already warn-by-default, and a future compatibility warning (FCW) that warned even in dependencies. This lint will become a hard error in the future. - [Trait impl modifiers (e.g., `unsafe`, `!`, `default`) in inherent impls are no longer syntactically valid](rust-lang/rust#144386) - [Start reporting future breakage for `ill_formed_attribute_input` in dependencies](rust-lang/rust#144544) - [Restrict the scope of temporaries created by the macros `pin!`, `format_args!`, `write!`, and `writeln!` in `if let` scrutinees in Rust Edition 2024.](rust-lang/rust#145342) This applies [Rust Edition 2024's `if let` temporary scope rules](https://doc.rust-lang.org/edition-guide/rust-2024/temporary-if-let-scope.html) to these temporaries, which previously could live past the `if` expression regardless of Edition. - [Invalid numeric literal suffixes in tuple indexing, tuple struct indexing, and struct field name positions are now correctly rejected](rust-lang/rust#145463) - [Closures marked with the keyword `static` are now syntactically invalid](rust-lang/rust#145604) - [Shebangs inside `--cfg` and `--check-cfg` arguments are no longer allowed](rust-lang/rust#146211) - [Add future incompatibility lint for temporary lifetime shortening in Rust 1.92](rust-lang/rust#147056) Cargo compatibility notes: - `cargo publish` no longer keeps `.crate` tarballs as final build artifacts when `build.build-dir` is set. These tarballs were previously included due to an oversight and are now treated as intermediate artifacts. To get `.crate` tarballs as final artifacts, use `cargo package`. In a future version, this change will apply regardless of `build.build-dir`. [#15910](rust-lang/cargo#15910) - Adjust Cargo messages to match rustc diagnostic style. This changes some of the terminal colors used by Cargo messages. [#15928](rust-lang/cargo#15928) - Tools and projects relying on the [internal details of Cargo's `build-dir`](https://doc.rust-lang.org/cargo/reference/build-cache.html) may not work for users changing their `build-dir` layout. For those doing so, we'd recommend proactively testing these cases particularly as we are considering changing the default location of the `build-dir` in the future ([cargo#16147](rust-lang/cargo#16147)). If you can't migrate off of Cargo's internal details, we'd like to learn more about your use case as we prepare to change the layout of the `build-dir` ([cargo#15010](rust-lang/cargo#15010)). <a id="1.91.0-Internal-Changes"></a> ## Internal Changes These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Update to LLVM 21](rust-lang/rust#143684) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

Pkgsrc changes: * Adjust patches to adapt to upstream changes and new versions. * assosicated checksums * Add a workaround for LLVM mis-using -isystem. Reported upstream at llvm/llvm-project#166420 Noteable failures at the time of commit: * The cross-build for armv6 fails, reported upstream at rust-lang/rust#148464 * The cross-build for powerpc fails, reported upstream at rust-lang/rust#148497 This is R_PPC_PLTREL24 which now has insufficient range. Asked for recpie for directing the rust code generator to cope. Upstream changes relative to 1.90.0: Version 1.91.0 (2025-10-30) ========================== Language -------- - [Lower pattern bindings in the order they're written and base drop order on primary bindings' order] (rust-lang/rust#143764) - [Stabilize declaration of C-style variadic functions for `sysv64`, `win64`, `efiapi`, and `aapcs` ABIs] (rust-lang/rust#144066). This brings these ABIs in line with the C ABI: variadic functions can be declared in extern blocks but not defined. - [Add `dangling_pointers_from_locals` lint to warn against dangling pointers from local variables] (rust-lang/rust#144322) - [Upgrade `semicolon_in_expressions_from_macros` from warn to deny] (rust-lang/rust#144369) - [Stabilize LoongArch32 inline assembly] (rust-lang/rust#144402) - [Add warn-by-default `integer_to_ptr_transmutes` lint against integer-to-pointer transmutes] (rust-lang/rust#144531) - [Stabilize `sse4a` and `tbm` target features] (rust-lang/rust#144542) - [Add `target_env = "macabi"` and `target_env = "sim"` cfgs] (rust-lang/rust#139451) as replacements for the `target_abi` cfgs with the same values. Compiler -------- - [Don't warn on never-to-any `as` casts as unreachable] (rust-lang/rust#144804) Platform Support ---------------- - [Promote `aarch64-pc-windows-gnullvm` and `x86_64-pc-windows-gnullvm` to Tier 2 with host tools.] (rust-lang/rust#143031) Note: llvm-tools and MSI installers are missing but will be added in future releases. - [Promote `aarch64-pc-windows-msvc` to Tier 1] (rust-lang/rust#145682) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html Libraries --------- - [Print thread ID in panic message] (rust-lang/rust#115746) - [Fix overly restrictive lifetime in `core::panic::Location::file` return type] (rust-lang/rust#132087) - [Guarantee parameter order for `_by()` variants of `min` / `max`/ `minmax` in `std::cmp`] (rust-lang/rust#139357) - [Document assumptions about `Clone` and `Eq` traits] (rust-lang/rust#144330) - [`std::thread`: Return error if setting thread stack size fails] (rust-lang/rust#144210) This used to panic within the standard library. Stabilized APIs --------------- - [`Path::file_prefix`] (https://doc.rust-lang.org/stable/std/path/struct.Path.html#method.file_prefix) - [`AtomicPtr::fetch_ptr_add`] (https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_ptr_add) - [`AtomicPtr::fetch_ptr_sub`] (https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_ptr_sub) - [`AtomicPtr::fetch_byte_add`] (https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_byte_add) - [`AtomicPtr::fetch_byte_sub`] (https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_byte_sub) - [`AtomicPtr::fetch_or`] (https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_or) - [`AtomicPtr::fetch_and`] (https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_and) - [`AtomicPtr::fetch_xor`] (https://doc.rust-lang.org/stable/std/sync/atomic/struct.AtomicPtr.html#method.fetch_xor) - [`{integer}::strict_add`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_add) - [`{integer}::strict_sub`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_sub) - [`{integer}::strict_mul`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_mul) - [`{integer}::strict_div`] (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_div) - [`{integer}::strict_div_euclid`] (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_div_euclid) - [`{integer}::strict_rem`] (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_rem) - [`{integer}::strict_rem_euclid`] (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_rem_euclid) - [`{integer}::strict_neg`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_neg) - [`{integer}::strict_shl`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_shl) - [`{integer}::strict_shr`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_shr) - [`{integer}::strict_pow`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_pow) - [`i{N}::strict_add_unsigned`] (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_add_unsigned) - [`i{N}::strict_sub_unsigned`] (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_sub_unsigned) - [`i{N}::strict_abs`] (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.strict_abs) - [`u{N}::strict_add_signed`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_add_signed) - [`u{N}::strict_sub_signed`] (https://doc.rust-lang.org/stable/std/primitive.u32.html#method.strict_sub_signed) - [`PanicHookInfo::payload_as_str`] (https://doc.rust-lang.org/stable/std/panic/struct.PanicHookInfo.html#method.payload_as_str) - [`core::iter::chain`] (https://doc.rust-lang.org/stable/core/iter/fn.chain.html) - [`u{N}::checked_signed_diff`] (https://doc.rust-lang.org/stable/std/primitive.u16.html#method.checked_signed_diff) - [`core::array::repeat`] (https://doc.rust-lang.org/stable/core/array/fn.repeat.html) - [`PathBuf::add_extension`] (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.add_extension) - [`PathBuf::with_added_extension`] (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.with_added_extension) - [`Duration::from_mins`] (https://doc.rust-lang.org/stable/std/time/struct.Duration.html#method.from_mins) - [`Duration::from_hours`] (https://doc.rust-lang.org/stable/std/time/struct.Duration.html#method.from_hours) - [`impl PartialEq<str> for PathBuf`] (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#impl-PartialEq%3Cstr%3E-for-PathBuf) - [`impl PartialEq<String> for PathBuf`] (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#impl-PartialEq%3CString%3E-for-PathBuf) - [`impl PartialEq<str> for Path`] (https://doc.rust-lang.org/stable/std/path/struct.Path.html#impl-PartialEq%3Cstr%3E-for-Path) - [`impl PartialEq<String> for Path`] (https://doc.rust-lang.org/stable/std/path/struct.Path.html#impl-PartialEq%3CString%3E-for-Path) - [`impl PartialEq<PathBuf> for String`] (https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-PartialEq%3CPathBuf%3E-for-String) - [`impl PartialEq<Path> for String`] (https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-PartialEq%3CPath%3E-for-String) - [`impl PartialEq<PathBuf> for str`] (https://doc.rust-lang.org/stable/std/primitive.str.html#impl-PartialEq%3CPathBuf%3E-for-str) - [`impl PartialEq<Path> for str`] (https://doc.rust-lang.org/stable/std/primitive.str.html#impl-PartialEq%3CPath%3E-for-str) - [`Ipv4Addr::from_octets`] (https://doc.rust-lang.org/stable/std/net/struct.Ipv4Addr.html#method.from_octets) - [`Ipv6Addr::from_octets`] (https://doc.rust-lang.org/stable/std/net/struct.Ipv6Addr.html#method.from_octets) - [`Ipv6Addr::from_segments`] (https://doc.rust-lang.org/stable/std/net/struct.Ipv6Addr.html#method.from_segments) - [`impl<T> Default for Pin<Box<T>> where Box<T>: Default, T: ?Sized`] (https://doc.rust-lang.org/stable/std/default/trait.Default.html#impl-Default-for-Pin%3CBox%3CT%3E%3E) - [`impl<T> Default for Pin<Rc<T>> where Rc<T>: Default, T: ?Sized`] (https://doc.rust-lang.org/stable/std/default/trait.Default.html#impl-Default-for-Pin%3CRc%3CT%3E%3E) - [`impl<T> Default for Pin<Arc<T>> where Arc<T>: Default, T: ?Sized`] (https://doc.rust-lang.org/stable/std/default/trait.Default.html#impl-Default-for-Pin%3CArc%3CT%3E%3E) - [`Cell::as_array_of_cells`] (https://doc.rust-lang.org/stable/std/cell/struct.Cell.html#method.as_array_of_cells) - [`u{N}::carrying_add`] (https://doc.rust-lang.org/stable/std/primitive.u64.html#method.carrying_add) - [`u{N}::borrowing_sub`] (https://doc.rust-lang.org/stable/std/primitive.u64.html#method.borrowing_sub) - [`u{N}::carrying_mul`] (https://doc.rust-lang.org/stable/std/primitive.u64.html#method.carrying_mul) - [`u{N}::carrying_mul_add`] (https://doc.rust-lang.org/stable/std/primitive.u64.html#method.carrying_mul_add) - [`BTreeMap::extract_if`] (https://doc.rust-lang.org/stable/std/collections/struct.BTreeMap.html#method.extract_if) - [`BTreeSet::extract_if`] (https://doc.rust-lang.org/stable/std/collections/struct.BTreeSet.html#method.extract_if) - [`impl Debug for windows::ffi::EncodeWide<'_>`] (https://doc.rust-lang.org/stable/std/os/windows/ffi/struct.EncodeWide.html#impl-Debug-for-EncodeWide%3C'_%3E) - [`str::ceil_char_boundary`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.ceil_char_boundary) - [`str::floor_char_boundary`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.floor_char_boundary) - [`impl Sum for Saturating<u{N}>`] (https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Sum-for-Saturating%3Cu32%3E) - [`impl Sum<&Self> for Saturating<u{N}>`] (https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Sum%3C%26Saturating%3Cu32%3E%3E-for-Saturating%3Cu32%3E) - [`impl Product for Saturating<u{N}>`] (https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Product-for-Saturating%3Cu32%3E) - [`impl Product<&Self> for Saturating<u{N}>`] (https://doc.rust-lang.org/stable/std/num/struct.Saturating.html#impl-Product%3C%26Saturating%3Cu32%3E%3E-for-Saturating%3Cu32%3E) These previously stable APIs are now stable in const contexts: - [`<[T; N]>::each_ref`] (https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_ref) - [`<[T; N]>::each_mut`] (https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_mut) - [`OsString::new`] (https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.new) - [`PathBuf::new`] (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.new) - [`TypeId::of`] (https://doc.rust-lang.org/stable/std/any/struct.TypeId.html#method.of) - [`ptr::with_exposed_provenance`] (https://doc.rust-lang.org/stable/std/ptr/fn.with_exposed_provenance.html) - [`ptr::with_exposed_provenance_mut`] (https://doc.rust-lang.org/stable/std/ptr/fn.with_exposed_provenance_mut.html) Cargo ----- - 🎉 Stabilize `build.build-dir`. This config sets the directory where intermediate build artifacts are stored. These artifacts are produced by Cargo and rustc during the build process. End users usually won't need to interact with them, and the layout inside `build-dir` is an implementation detail that may change without notice. ([config doc] (https://doc.rust-lang.org/stable/cargo/reference/config.html#buildbuild-dir)) ([build cache doc] (https://doc.rust-lang.org/stable/cargo/reference/build-cache.html)) [#15833](rust-lang/cargo#15833) [#15840](rust-lang/cargo#15840) - The `--target` flag and the `build.target` configuration can now take literal `"host-tuple"` string, which will internally be substituted by the host machine's target triple. [#15838](rust-lang/cargo#15838) [#16003](rust-lang/cargo#16003) [#16032](rust-lang/cargo#16032) Rustdoc ----- - [In search results, rank doc aliases lower than non-alias items with the same name](rust-lang/rust#145100) - [Raw pointers now work in type-based search like references] (rust-lang/rust#145731). This means you can now search for things like `*const u8 ->`, and additionally functions that take or return raw pointers will now display their signature properly in search results. Compatibility Notes ------------------- - [Always require coroutine captures to be drop-live] (rust-lang/rust#144156) - [Apple: Always pass SDK root when linking with `cc`, and pass it via `SDKROOT` env var] (rust-lang/rust#131477). This should fix linking issues with `rustc` running inside Xcode. Libraries in `/usr/local/lib` may no longer be linked automatically, if you develop or use a crate that relies on this, you should explicitly set `cargo::rustc-link-search=/usr/local/lib` in a `build.rs` script. - [Relaxed bounds in associated type bound position like in `TraitRef<AssocTy: ?Sized>` are now correctly forbidden] (rust-lang/rust#135331) - [Add unstable `#[sanitize(xyz = "on|off")]` built-in attribute that shadows procedural macros with the same name] (rust-lang/rust#142681) - [Fix the drop checker being more permissive for bindings declared with let-else] (rust-lang/rust#143028) - [Be more strict when parsing attributes, erroring on many invalid attributes] (rust-lang/rust#144689) - [Error on invalid `#[should_panic]` attributes] (rust-lang/rust#143808) - [Error on invalid `#[link]` attributes] (rust-lang/rust#143193) - [Mark all deprecation lints in name resolution as deny-by-default and also report in dependencies] (rust-lang/rust#143929) - The lint `semicolon_in_expressions_from_macros`, for `macro_rules!` macros in expression position that expand to end in a semicolon (`;`), is now deny-by-default. It was already warn-by-default, and a future compatibility warning (FCW) that warned even in dependencies. This lint will become a hard error in the future. - [Trait impl modifiers (e.g., `unsafe`, `!`, `default`) in inherent impls are no longer syntactically valid] (rust-lang/rust#144386) - [Start reporting future breakage for `ill_formed_attribute_input` in dependencies] (rust-lang/rust#144544) - [Restrict the scope of temporaries created by the macros `pin!`, `format_args!`, `write!`, and `writeln!` in `if let` scrutinees in Rust Edition 2024.] (rust-lang/rust#145342) This applies [Rust Edition 2024's `if let` temporary scope rules] (https://doc.rust-lang.org/edition-guide/rust-2024/temporary-if-let-scope.html) to these temporaries, which previously could live past the `if` expression regardless of Edition. - [Invalid numeric literal suffixes in tuple indexing, tuple struct indexing, and struct field name positions are now correctly rejected] (rust-lang/rust#145463) - [Closures marked with the keyword `static` are now syntactically invalid] (rust-lang/rust#145604) - [Shebangs inside `--cfg` and `--check-cfg` arguments are no longer allowed] (rust-lang/rust#146211) - [Add future incompatibility lint for temporary lifetime shortening in Rust 1.92] (rust-lang/rust#147056) Cargo compatibility notes: - `cargo publish` no longer keeps `.crate` tarballs as final build artifacts when `build.build-dir` is set. These tarballs were previously included due to an oversight and are now treated as intermediate artifacts. To get `.crate` tarballs as final artifacts, use `cargo package`. In a future version, this change will apply regardless of `build.build-dir`. [#15910](rust-lang/cargo#15910) - Adjust Cargo messages to match rustc diagnostic style. This changes some of the terminal colors used by Cargo messages. [#15928](rust-lang/cargo#15928) - Tools and projects relying on the [internal details of Cargo's `build-dir`] (https://doc.rust-lang.org/cargo/reference/build-cache.html) may not work for users changing their `build-dir` layout. For those doing so, we'd recommend proactively testing these cases particularly as we are considering changing the default location of the `build-dir` in the future ([cargo#16147](rust-lang/cargo#16147)). If you can't migrate off of Cargo's internal details, we'd like to learn more about your use case as we prepare to change the layout of the `build-dir` ([cargo#15010] (rust-lang/cargo#15010)). Internal Changes ---------------- These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Update to LLVM 21](rust-lang/rust#143684)

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Add target_env = "macabi" and target_env = "sim" rust-lang/reference#1781

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docs(ref): Use better example value in CARGO_CFG_TARGET_ABI rust-lang/cargo#15404

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madsmtm force-pushed the apple-target-env-abi branch from 8a2104f to 8ab20f3 Compare April 6, 2025 15:41

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docs(ref): Use better example value in CARGO_CFG_TARGET_ABI (#15404)

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`target_abi = "sim"` may be deprecated in the future. See rust-lang/rust#139451.

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Add target_env = "macabi" and target_env = "sim"

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Rollup of 8 pull requests #145126

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[win][arm64ec] Fix finding assembler and setting is_arm for Arm64EC rust-lang/cc-rs#1511

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Fix parsing of nigthly targets rust-lang/cc-rs#1517

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Fix parsing of nigthly targets (#1517)

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rust-lang/rust#139451 updated the sim/macabi to be env instead of abi

wesleywiser added the relnotes Marks issues that should be documented in the release notes of the next release. label Aug 12, 2025

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initial implementation of the darwin_objc unstable feature #145660

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Draft release notes for 1.91 #147010

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Fix building for Mac Catalyst rust-lang/cc-rs#1577

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Add `target_env = "macabi"` and `target_env = "sim"` #139451

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