2. change armv7_wrs_vxworks to armv7_wrs_vxworks_eabihf.
3. use wr-** instead of vx-**
4. set PIE to false
5. code cleanup

That way, callers don't need to repeat "let's add this to sm manually
for tracking dependencies" trick.

It should make it easier to switch to using `FileLoader` for binary
files in the future as well

on OpenBSD, some architectures relies on libc++ (from LLVM) and some
others on libestdc++ (particular version of libstdc++ from GCC).

sparc64-unknown-openbsd needs libestdc++ and libgcc (as x86_64 some
years ago). Reintroduce the support of them for openbsd, only for
sparc64 arch. Some others architectures on OpenBSD could use them too.

update for vxWorks

The definition path table contains *all* definitions, not just public
definitions.

with -> which , and re-wrap line.

…:PatternRange`.

Running UI tests now takes a huge amount of time on mingw builders
(between 40 and 50 minutes), with mingw-1 builders taking even an hour
less to finish than mingw-2. This PR moves linkcheck from mingw-2 to
mingw-1, removing between 10 and 20 minutes of runtime on the -2
builders.

… and add a separately-unstable field to force non-exhaustive matching
(`#[non_exhaustive]` is no implemented yet on enum variants)
so that we have the option to later expose the allocator’s error value.

CC rust-lang/wg-allocators#23

Add custom nth_back for Chain

Implementation of nth_back for Chain.
Part of rust-lang#54054

Finalize the error type for `try_reserve`

See tracking issue comments from rust-lang#48043 (comment).

It is now:

```rust
/// The error type for `try_reserve` methods.
#[derive(Clone, PartialEq, Eq, Debug)]
#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
pub enum TryReserveError {
    /// Error due to the computed capacity exceeding the collection's maximum
    /// (usually `isize::MAX` bytes).
    CapacityOverflow,

    /// The memory allocator returned an error
    AllocError {
        /// The layout of allocation request that failed
        layout: Layout,

        #[doc(hidden)]
        #[unstable(feature = "container_error_extra", issue = "0", reason = "\
            Enable exposing the allocator’s custom error value \
            if an associated type is added in the future: \
            rust-lang/wg-allocators#23")]
        non_exhaustive: (),
    },
}

#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
impl From<LayoutErr> for TryReserveError {
    #[inline]
    fn from(_: LayoutErr) -> Self {
        TryReserveError::CapacityOverflow
    }
}
```

Changes:

* A `Layout` is included. Firefox wants to log the size of failed allocations. If this were not part of the return value of e.g. `HashMap::try_reserve`, users would only be able to estimate based on `HashMap::capacity` and assumptions about the allocation strategy of `HashMap`.

* There’s a dummy field that can stay unstable when `try_reserve` and the rest of this enum are stabilized. This forces non-exhaustive matching ~(rust-lang#44109 is not implemented yet for variants)~ and allows adding another field in the future if we want to expose custom error values from the allocator. See rust-lang/wg-allocators#23.

  - If the `Alloc` trait is stabilized without an associated error type and with a zero-size `AllocErr` type, we can simply remove this dummy field.
  - If an associated type is added, we can add a default type parameter to `ContainerError` and a generic field to the `AllocError` variant.

* ~Moved from the `collections` module to the `alloc` module, and replaced `Collection` in the enum name with `Container`. The wold collection implies a multiplicity of items which is not relevant to this type. For example we may want to use this error type in a future `Box::try_new` method.~

  - Renamed to `TryReserveError`, after the methods that involve this type: rust-lang#61780 (comment)

* Replaced `Err` with `Error` in the enum and variant names. There is more precedent for this in https://doc.rust-lang.org/std/error/trait.Error.html#implementors, `AllocErr` and `LayoutErr` are the odd ones.

* ~Dropped `Alloc` in the enum name. `ContainerAllocError` with a mouthful, and being in the `alloc` module already provides the same indication.~

 Remove redundant `ty` fields from `mir::Constant` and `hair::pattern::PatternRange`.

Fixes rust-lang#56137.

As a side-effect, associated const literals have the correct type now, which should make things easier for rust-lang#61041.

r? @oli-obk / @matthewjasper cc @davidtwco @varkor

…petrochenkov

Make sure that all file loading happens via SourceMap

That way, callers don't need to repeat "let's add this to sm manually
for tracking dependencies" trick.

It should make it easier to switch to using `FileLoader` for binary
files in the future as well

cc rust-lang#62948

r? @petrochenkov

…hton

add sparc64-unknown-openbsd target

on OpenBSD, some architectures relies on libc++ (from LLVM) and some
others on libestdc++ (particular version of libstdc++ from GCC).

sparc64-unknown-openbsd needs libestdc++ and libgcc (as x86_64 some
years ago). Reintroduce the support of them for openbsd, only for
sparc64 arch. Some others architectures on OpenBSD could use them too.

Some update for vxWorks

1. support crt-static
2. change armv7_wrs_vxworks to armv7_wrs_vxworks_eabihf.
3. change vx-cxx to wr-c++,  vx-ar to wr-ar and vx-run to wr-run.
4. code cleanup

r? @alexcrichton

Hygienize use of built-in macros in the standard library

Same as rust-lang#61629, but for built-in macros.

Closes rust-lang#48781
r? @alexcrichton

A couple of comment fixes.

This change fixes a couple of comments in the compiler code.

The first change was discussed with @eddyb. This one confused me because I thought only *public* defs were in the table (not so).

The second was a typo I noticed yesterday.

OK to go in?

…crichton

ci: properly set the job name in CPU stats

r? @alexcrichton

ci: move linkcheck from mingw-2 to mingw-1

Running UI tests now takes a huge amount of time on mingw builders
(between 40 and 50 minutes), with mingw-1 builders taking even an hour
less to finish than mingw-2. This PR moves linkcheck from mingw-2 to
mingw-1, removing between 10 and 20 minutes of runtime on the -2
builders.

r? @alexcrichton