It makes the relationship with `Symbol` clearer. The `Str` suffix
matches the existing `Symbol::as_str()` method nicely, and is also
consistent with it being a wrapper of `&str`.

Including removing a bunch of unnecessary `.as_str()` calls, and a bunch
of unnecessary sigils.

Because it's highly magical, which goes against the goal of keeping
`SymbolStr` simple. Plus it's only used in a handful of places that
only require minor changes.

As of LLVM 9, this is required for 32-bit PowerPC to properly generate
PLT references. Previously, only BigPIC was supported; now LLVM supports
both BigPIC and SmallPIC, and there is no default value provided.

This system call is present on all supported NetBSD versions and
provides an endless stream of non-blocking random data from the
kernel's ChaCha20-based CSPRNG. It doesn't require a file descriptor
to be opened.

The system call is documented here (under kern.arandom):
https://netbsd.gw.com/cgi-bin/man-cgi?sysctl+7+NetBSD-7.0

And defined here:
https://nxr.netbsd.org/xref/src/sys/sys/sysctl.h#273

The semantics are the same as FreeBSD so reading 256 bytes per call
is fine.

Similar change for getrandom crate: rust-random/getrandom#115

This is a copy of thumbv7neon-unknown-linux-gnueabihf with musl changes
merged from armv7-unknown-linux-musleabihf.

This updates the libc that the `wasm32-wasi` target links against to the
latest revision, mostly just bringing in minor bug fixes and minor wasm
size improvements.

…ing-and-more, r=estebank

Rename `LocalInternedString` and more

This PR renames `LocalInternedString` as `SymbolStr`, removes an unnecessary `impl` from it, improves comments, and cleans up some `SymbolStr` uses.

r? @estebank

…ochenkov

caller_location: point to macro invocation sites, like file!/line!, and use in core::panic!.

The main change here is to `core::panic!`, trying to fix this remaining regression: rust-lang#65927 (comment)

However, in order for `caller_location` to be usable from macros the same way `file!()`/`line!()` are, it needs to have the same behavior (of extracting the macro invocation site `Span` and using that).

Arguably we would've had to do this at some point anyway, if we want to use `#[track_caller]` to replace the `file!()`/`line!()` uses from macros, but I'm not sure the RFC mentions this at all.

r? @petrochenkov cc @anp @nnethercote

…matklad

librustc_lexer: Refactor the module

This PR introduces a refactoring of the `librustc_lexer` in order to improve readability.

All the changes performed are only cosmetic and do not introduce any changes the lexer logic or performance.

Newly introduced modules `literal`, `token` and `utils` are just copy-pasted from the `lib.rs` and do not contain even cosmetic changes (I decided to do so so it'll be easier to review changes looking only on diff).

r? @petrochenkov

cc @Centril @matklad

Configure LLVM module PIC level

As of LLVM 9, this is required for 32-bit PowerPC to properly generate
PLT references. Previously, only BigPIC was supported; now LLVM supports
both BigPIC and SmallPIC, and there is no default value provided.

bump smallvec to 1.0

This includes servo/rust-smallvec#162, fixing an unsoundness in smallvec.

See servo/rust-smallvec#175 for the 1.0 release announcement.

Cc @mbrubeck @emilio

Use KERN_ARND syscall for random numbers on NetBSD, same as FreeBSD.

This system call is present on all supported NetBSD versions and provides an endless stream of non-blocking random data from the kernel's ChaCha20-based CSPRNG. It doesn't require a file like `/dev/urandom` to be opened.

The system call is documented here (under kern.arandom):
https://netbsd.gw.com/cgi-bin/man-cgi?sysctl+7+NetBSD-7.0

And defined here:
https://nxr.netbsd.org/xref/src/sys/sys/sysctl.h#273

The semantics are the same as FreeBSD so reading 256 bytes per call is fine.

Similar change for getrandom crate: rust-random/getrandom#115

Add target thumbv7neon-unknown-linux-musleabihf

This is a copy of thumbv7neon-unknown-linux-gnueabihf with musl changes
merged from armv7-unknown-linux-musleabihf. This appears to have been
missed when adding the other ARMv7-A thumb targets.

…rk-Simulacrum

Update the bundled `wasi-libc` repository

This updates the libc that the `wasm32-wasi` target links against to the
latest revision, mostly just bringing in minor bug fixes and minor wasm
size improvements.

use American spelling for `pluralize!`