Update wip/rust to version 1.51.0.

Pkgsrc changes:
 * Remove one SunOS patch, apparently no longer needed.
 * Adapt one patch for Darwin, adjust cargo checksum accordingly.
 * Adjust bootstraps to version 1.50.0.

Version 1.51.0 (2021-03-25)
============================

Language
--------
- [You can now parameterize items such as functions, traits, and
  `struct`s by constant values in addition to by types and
  lifetimes.][79135] Also known as "const generics" E.g. you can
  now write the following. Note:  Only values of primitive integers,
  `bool`, or `char` types are currently permitted.

  ```rust
  struct GenericArray<T, const LENGTH: usize> {
      inner: [T; LENGTH]
  }

  impl<T, const LENGTH: usize> GenericArray<T, LENGTH> {
      const fn last(&self) -> Option<&T> {
          if LENGTH == 0 {
              None
          } else {
              Some(&self.inner[LENGTH - 1])
          }
      }
  }
  ```

Compiler
--------

- [Added the `-Csplit-debuginfo` codegen option for macOS platforms.][79570]
  This option controls whether debug information is split across
  multiple files or packed into a single file. **Note** This option
  is unstable on other platforms.
- [Added tier 3\* support for `aarch64_be-unknown-linux-gnu`,
  `aarch64-unknown-linux-gnu_ilp32`, and
  `aarch64_be-unknown-linux-gnu_ilp32` targets.][81455]
- [Added tier 3 support for `i386-unknown-linux-gnu` and
  `i486-unknown-linux-gnu` targets.][80662]
- [The `target-cpu=native` option will now detect individual features
  of CPUs.][80749]
- [Rust now uses `inline-asm` for stack probes when used with LLVM
  11.0.1+][77885]

\* Refer to Rust's [platform support page][forge-platform-support]
for more information on Rust's tiered platform support.

Libraries
---------

- [`Box::downcast` is now also implemented for any `dyn Any + Send
  + Sync` object.][80945]
- [`str` now implements `AsMut<str>`.][80279]
- [`u64` and `u128` now implement `From<char>`.][79502]
- [`Error` is now implemented for `&T` where `T` implements `Error`.][75180]
- [`Poll::{map_ok, map_err}` are now implemented for `Poll<Option<Result<T,
  E>>>`.][80968]
- [`unsigned_abs` is now implemented for all signed integer types.][80959]
- [`io::Empty` now implements `io::Seek`.][78044]
- [`rc::Weak<T>` and `sync::Weak<T>`'s methods such as `as_ptr`
  are now implemented for `T: ?Sized` types.][80764]

Stabilized APIs
---------------

- [`Arc::decrement_strong_count`]
- [`Arc::increment_strong_count`]
- [`Once::call_once_force`]
- [`Peekable::next_if_eq`]
- [`Peekable::next_if`]
- [`Seek::stream_position`]
- [`array::IntoIter`]
- [`panic::panic_any`]
- [`ptr::addr_of!`]
- [`ptr::addr_of_mut!`]
- [`slice::fill_with`]
- [`slice::split_inclusive_mut`]
- [`slice::split_inclusive`]
- [`slice::strip_prefix`]
- [`slice::strip_suffix`]
- [`str::split_inclusive`]
- [`sync::OnceState`]
- [`task::Wake`]

Cargo
-----
- [Added the `split-debuginfo` profile option to control the -Csplit-debuginfo
  codegen option.][cargo/9112]
- [Added the `resolver` field to `Cargo.toml` to enable the new
  feature resolver and CLI option behavior.][cargo/8997] Version
  2 of the feature resolver will try to avoid unifying features of
  dependencies where that unification could be unwanted.  Such as
  using the same dependency with a `std` feature in a build scripts
  and proc-macros, while using the `no-std` feature in the final
  binary. See the [Cargo book documentation][[email protected]]
  for more information on the feature.

Rustdoc
-------
- [Rustdoc will now include documentation for methods available
  from `Deref` traits.][80653]
- [You can now provide a `--default-theme` flag which sets the
  default theme to use for documentation.][79642]

Various improvements to intra-doc links:

- [You can link to non-path primitives such as `slice`.][80181]
- [You can link to associated items.][74489]
- [You can now include generic parameters when linking to items,
  like `Vec<T>`.][76934]

Misc
----
- [You can now pass `--include-ignored` to tests (e.g. with
  `cargo test -- --include-ignored`) to include testing tests marked
  `#[ignore]`.][80053]

Compatibility Notes
-------------------

- [WASI platforms no longer use the `wasm-bindgen` ABI, and instead
  use the wasm32 ABI.][79998]
- [`rustc` no longer promotes division, modulo and indexing operations
  to `const` that could fail.][80579]

- [The minimum version of glibc for the following platforms has
  been bumped to version 2.31 for the distributed artifacts.][81521]
    - `armv5te-unknown-linux-gnueabi`
    - `sparc64-unknown-linux-gnu`
    - `thumbv7neon-unknown-linux-gnueabihf`
    - `armv7-unknown-linux-gnueabi`
    - `x86_64-unknown-linux-gnux32`

Internal Only
-------------

- [Consistently avoid constructing optimized MIR when not doing codegen][80718]

[79135]: rust-lang/rust#79135
[74489]: rust-lang/rust#74489
[76934]: rust-lang/rust#76934
[79570]: rust-lang/rust#79570
[80181]: rust-lang/rust#80181
[79642]: rust-lang/rust#79642
[80945]: rust-lang/rust#80945
[80279]: rust-lang/rust#80279
[80053]: rust-lang/rust#80053
[79502]: rust-lang/rust#79502
[75180]: rust-lang/rust#75180
[79135]: rust-lang/rust#79135
[81521]: rust-lang/rust#81521
[80968]: rust-lang/rust#80968
[80959]: rust-lang/rust#80959
[80718]: rust-lang/rust#80718
[80653]: rust-lang/rust#80653
[80579]: rust-lang/rust#80579
[79998]: rust-lang/rust#79998
[78044]: rust-lang/rust#78044
[81455]: rust-lang/rust#81455
[80764]: rust-lang/rust#80764
[80749]: rust-lang/rust#80749
[80662]: rust-lang/rust#80662
[77885]: rust-lang/rust#77885
[cargo/8997]: rust-lang/cargo#8997
[cargo/9112]: rust-lang/cargo#9112
[[email protected]]: https://doc.rust-lang.org/nightly/cargo/reference/features.html#feature-resolver-version-2
[`Once::call_once_force`]: https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.call_once_force
[`sync::OnceState`]: https://doc.rust-lang.org/stable/std/sync/struct.OnceState.html
[`panic::panic_any`]: https://doc.rust-lang.org/stable/std/panic/fn.panic_any.html
[`slice::strip_prefix`]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.strip_prefix
[`slice::strip_suffix`]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.strip_prefix
[`Arc::increment_strong_count`]: https://doc.rust-lang.org/nightly/std/sync/struct.Arc.html#method.increment_strong_count
[`Arc::decrement_strong_count`]: https://doc.rust-lang.org/nightly/std/sync/struct.Arc.html#method.decrement_strong_count
[`slice::fill_with`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.fill_with
[`ptr::addr_of!`]: https://doc.rust-lang.org/nightly/std/ptr/macro.addr_of.html
[`ptr::addr_of_mut!`]: https://doc.rust-lang.org/nightly/std/ptr/macro.addr_of_mut.html
[`array::IntoIter`]: https://doc.rust-lang.org/nightly/std/array/struct.IntoIter.html
[`slice::split_inclusive`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_inclusive
[`slice::split_inclusive_mut`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_inclusive_mut
[`str::split_inclusive`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_inclusive
[`task::Wake`]: https://doc.rust-lang.org/nightly/std/task/trait.Wake.html
[`Seek::stream_position`]: https://doc.rust-lang.org/nightly/std/io/trait.Seek.html#method.stream_position
[`Peekable::next_if`]: https://doc.rust-lang.org/nightly/std/iter/struct.Peekable.html#method.next_if
[`Peekable::next_if_eq`]: https://doc.rust-lang.org/nightly/std/iter/struct.Peekable.html#method.next_if_eq

Author: he32

rust/Makefile

@@ -1,6 +1,6 @@
 # $NetBSD: Makefile,v 1.197 2020/09/29 16:45:16 gdt Exp $
 
-DISTNAME=	rustc-1.50.0-src
+DISTNAME=	rustc-1.51.0-src
 PKGNAME=	${DISTNAME:S/rustc/rust/:S/-src//}
 CATEGORIES=	lang
 MASTER_SITES=	https://static.rust-lang.org/dist/
@@ -156,23 +156,23 @@ BUILDLINK_TRANSFORM.NetBSD+=	rm:-Wl,--enable-new-dtags
 DISTFILES:=		${DEFAULT_DISTFILES}
 
 .if !empty(MACHINE_PLATFORM:MDarwin-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH:=		x86_64-apple-darwin
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MLinux-*-i386) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH:=		i686-unknown-linux-gnu
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MLinux-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH:=		x86_64-unknown-linux-gnu
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -185,7 +185,7 @@ pre-build-fix:
 # x86_64-sun-solaris bootstrap and comment out the overrides.
 #
 .if !empty(MACHINE_PLATFORM:MSunOS-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH:=		x86_64-unknown-illumos
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 SITES.${RUST_STAGE0}=	https://us-east.manta.joyent.com/pkgsrc/public/pkg-bootstraps/
@@ -199,15 +199,15 @@ CONFIGURE_ARGS+=	--target=${RUST_ARCH}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MFreeBSD-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH:=		x86_64-unknown-freebsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-i386) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH=		i686-unknown-netbsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -224,15 +224,15 @@ pre-build-fix:
 	${TOOLS_PLATFORM.paxctl} +am ${WRKDIR}/rust-bootstrap/bin/rustc
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-x86_64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH=		x86_64-unknown-netbsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-powerpc) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH=		powerpc-unknown-netbsd
 
 # Cross-built against NetBSD 9.0
@@ -256,7 +256,7 @@ SITES.${RUST_STD_STAGE0}=	${MASTER_SITE_LOCAL:=rust/}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-aarch64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH=		aarch64-unknown-netbsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -266,7 +266,7 @@ SITES.${RUST_STD_STAGE0}=	${MASTER_SITE_LOCAL:=rust/}
 pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-sparc64) || make(distinfo) || make (makesum) || make(mdi)
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_ARCH=		sparc64-unknown-netbsd
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
@@ -277,7 +277,7 @@ pre-build-fix:
 .endif
 .if !empty(MACHINE_PLATFORM:MNetBSD-*-earmv7hf) || make(distinfo) || make (makesum) || make(mdi)
 RUST_ARCH=		armv7-unknown-netbsd-eabihf
-RUST_STAGE0_VER=	1.49.0
+RUST_STAGE0_VER=	1.50.0
 RUST_STAGE0:=		rust-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 RUST_STD_STAGE0:=	rust-std-${RUST_STAGE0_VER}-${RUST_ARCH}.tar.gz
 DISTFILES:=		${DISTFILES} ${RUST_STAGE0} ${RUST_STD_STAGE0}
@@ -317,8 +317,8 @@ SUBST_VARS.rpath=	PREFIX
 # updating and verification.
 #
 CKSUM_CRATES+=	vendor/libc
-CKSUMS+=	0134ce769d06b1b1f50ad15d1aa7bd8d44bcd2f66c6318dd906de8bc4a4044c7
-CKSUMS+=	1107d18986be8af262f7a7c14761a9faf0228dc8a773379b9d7e8d2f711b3f37
+CKSUMS+=	8d7ddc8dd25a9404f9181a49438d9506c676cfd4b6fa21dbe5c1f9969abc4b91
+CKSUMS+=	f147be95b04ea1303171dff46c5a66b08cd47ccd0a4c346d5bcec7a8aaac3fc4
 
 CKSUM_CRATES+=	vendor/lzma-sys
 CKSUMS+=	6fd5e9245db34c6f557b8bfcaf03db82fc88c3b06dbfbb5f03b2bcd138983ef9