rust191: add a package for rust 1.91.0.

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)

Author: he32

rust191/DESCR

@@ -0,0 +1,13 @@
+Rust is a systems programming language focused on three goals: safety,
+speed, and concurrency.  It maintains these goals without having a
+garbage collector, making it a useful language for a number of use cases
+other languages aren't good at: embedding in other languages, programs
+with specific space and time requirements, and writing low-level code,
+like device drivers and operating systems.
+
+It improves on current languages targeting this space by having a number
+of compile-time safety checks that produce no runtime overhead, while
+eliminating all data races.  Rust also aims to achieve "zero-cost
+abstractions" even though some of these abstractions feel like those of
+a high-level language.  Even then, Rust still allows precise control
+like a low-level language would.

rust191/HOWTO-BOOTSTRAP

@@ -0,0 +1,85 @@
+How to build a rust bootstrap kit using pkgsrc
+----------------------------------------------
+
+A rust bootstrap kit is simply a pre-compiled binary of rust and
+the rust standard library, and contains the "rust" and "rust-std"
+build results, found in
+
+   work/rustc-<version>/build/dist/
+as
+   rust-<version>-<target>.tar.xz
+and
+   rust-std-<version>-<target>.tar.xz
+
+These result files are produced when the "dist" build target is
+used, ref. BUILD_TARGET.   For a normal native build of the rust
+pkgsrc package, the default BUILD_TARGET is "build", not "dist".
+
+There are two possible ways to produce a bootstrap kit:
+
+1) a native build.  This requires minimum preparation, except
+   possibly for setting rust.BUILD_TARGET to "dist" via e.g.
+   /etc/mk.conf.  Note that on NetBSD, using the "BUILD_TARGET" ==
+   "dist" results in the "rust-cargo-static" option being set, ref.
+   options.mk.  This is so that the resulting bootstrap kits are
+   built with mostly-static linking, reducing the run-time dependencies
+   of the bootstrap kits.
+
+2) a cross-build.  This requires a bit of preparation:
+
+   For each target you want to cross-build rust for, you need
+     - the cross toolchain resulting from "build.sh tools" for
+       the intended target
+     - an OS distribution extracted, including the comp.tgz
+       set so that the target's include files can be used
+     - for 32-bit ports, the "libatomic" package needs to be
+       available.  I'm sure there's a clever and long-winded
+       use of pkg_install which can be used to effect this;
+       I on my hand have always just extracted the tgz file
+       and done the minimal cleanup of the "cruft" files
+       which are part of the package meta-data.
+     - Pick a root directory for the target, e.g. /u/i386.
+       Below this directory place the "tools" containing
+       the cross-compiler in a "tools" sub-directory.
+       Similarly, the extracted OS distribution in the "dest"
+       sub-directory.
+
+   There are two methods available for doing the cross-compile:
+
+   a) Using the "cross.mk" file.  For an i386 build against i586, the
+      following settings should be active:
+
+CROSS_ROOT=            /u/i386
+MAKE_ENV+=             CROSS_ROOT=${CROSS_ROOT}
+GNU_CROSS_TARGET=      i486--netbsdelf
+MAKE_ENV+=             GNU_CROSS_TARGET=${GNU_CROSS_TARGET}
+TARGET=                i586-unknown-netbsd
+SCRIPTS=               ${WRKDIR}/scripts
+CONFIGURE_ARGS+=       --host=${TARGET}
+CONFIGURE_ARGS+=       --target=${TARGET}
+CONFIGURE_ARGS+=       --set=target.${TARGET}.cc=${SCRIPTS}/gcc-wrap
+CONFIGURE_ARGS+=       --set=target.${TARGET}.cxx=${SCRIPTS}/c++-wrap
+CONFIGURE_ARGS+=       --set=target.${TARGET}.linker=${SCRIPTS}/gcc-wrap
+CONFIGURE_ARGS+=       --set=target.${TARGET}.ar=${CROSS_ROOT}/tools/bin/${GNU_CROSS_TARGET}-ar
+
+      Then doing a "make" will cross-build rust, including the LLVM
+      embedded in the rust distribution, ref. the defaulting of that
+      option when TARGET is defined ref. options.mk.
+
+      Note that when TARGET is set, the default build target for
+      the rust makefile becomes "dist", so there's no need to set
+      rust.BUILD_TARGET for cross-builds.
+
+   b) Using the "do-cross.mk" Makefile.  This will attempt to
+      cross-build rust for all the targets listed in the SHORT_TARGETS
+      variable in that file.  Overriding the root directories for
+      the various targets can be done by making your own "local-roots.mk"
+      file, ref. "do-cross.mk".
+
+      This will create a "dist" subdirectory in the rust pkgsrc
+      directory, and the bootstrap kits for each architecture, plus
+      the library source kit will be placed in this directory.
+
+The bootstrap kits can then be placed in /usr/pkgsrc/distfiles, and
+be used by the "next" rust version, where you can use "make makesum"
+to compute the updated checksums for the bootstrap kits.