Make only rustc_trans depend on rustc_llvm
With these changes, only rustc_trans depends directly on rustc_llvm (and no crate gained a new dependency on trans). This means changing LLVM doesn't rebuild librustc or rustc_metadata, only rustc_trans, rustc_driver and the rustc executable
Also, rustc_driver technically doesn't know about LLVM any more (of course, it still handles a ton of options that conceptually refer to LLVM, but it delegates their implementation to trans).
What I *didn't* implement was merging most or all of rustc_llvm into rustc_trans. I ran into a nasty bug, which was probably just a silly typo somewhere but I probably won't have the time to figure it out in the next week or two. I opened #41699 for that step.
Fixes#41473
Update to the Rusty rust-installer
This updates the rust-installer submodule to the new version written in Rust (rust-lang/rust-installer#62), now moved to `src/tools/rust-installer` and invoked in `dist.rs` as a cargo-based tool command. All of the former shell-script invocations now invoke the tool, otherwise keeping the same arguments as before.
As a small bonus, `rustc-src` now also uses the same tarball generator, so it gains a smaller `.tar.xz` too.
Fixes#41569. r? @alexcrichton
linkchecker: Add support for <base> tag
Add support for the HTML <base> tag as used by mdBook so The Unstable
Book can be checked.
Also cleanup a few things:
* Stop checking the name attribute. It should never have been used and
mdBook has since been fixed not to use it.
* Make sure we only check html files.
* Remove a few unnecessary allocations.
Finally, dead links in The Unstable Book have been fixed.
This does not actually improve build times, since it still depends
on rustc_trans, but is better layering and fits the multi-backend
future slightly better.
Consequently, session creation can no longer initialize LLVM.
The few places that use the compiler without going through
rustc_driver/CompilerCalls thus need to be careful to manually
initialize LLVM (via rustc_trans!) immediately after session
creation.
This means librustc is not rebuilt when LLVM changes.
fix confusion about parts required for float formatting
The documentation for flt2dec doesn't match up with the actual
implementation, so fix the documentation to align with reality.
Presumably due to the mismatch, the formatting code for floats in
std::fmt can use correspondingly shorter arrays in some places, so fix
those places up as well.
Fixes#41304.
There's no shell interpreting the file paths under the new Rusty
rust-installer, so we don't need to use `sanitize_sh` for it. Plus,
the drive-letter transformation is actually harmful for the now-native
Windows rust-installer to understand those paths.
Make diagnostic note for existing method with unsatisfied trait bounds
multiline for cleaner output.
```
= note: the method `count` exists but the following trait bounds were not satisfied:
`[closure@../../src/test/compile-fail/issue-36053-2.rs:17:39: 17:53] : std::ops::FnMut<(&_,)>`
`std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>> [closure@../../src/test/compile-fail/issue-36053-2.rs:17:39: 17:53]> : std::iter::Iterator`
Before:
```
= note: the method `count` exists but the following trait bounds were not satisfied: `[closure@../../src/test/compile-fail/issue-36053-2.rs:17:39: 17:53] : std::ops::FnMut<(&_,)>`, `std::iter::Filter<std::iter::Fuse<std::iter::Once<&str>>, [closure@../../src/test/compile-fail/issue-36053-2.rs:17:39: 17:53]> : std::iter::Iterator`
```
Move the code for loading metadata from rlibs and dylibs from
rustc_metadata into rustc_trans, and introduce a trait to avoid
introducing a direct dependency on rustc_trans.
This means rustc_metadata is no longer rebuilt when LLVM changes.
Part of #29378 .
- In particular explains *why* we would use the builder instead of
the free function.
- Changes the parent-child explanation for a spawned-caller.
- Add link to `io::Result` in `thread::Builder`
- Corrects the `thread::Builder::spawn` documentation.
Add support for the HTML <base> tag as used by mdBook so The Unstable
Book can be checked.
Also cleanup a few things:
* Stop checking the name attribute. It should never have been used and
mdBook has since been fixed not to use it.
* Make sure we only check html files.
* Remove a few unnecessary allocations.
Finally, dead links in The Unstable Book have been fixed.
Update RLS to solve serious crash
As a follow-up to rust-lang-nursery/rls#312, this PR contains the fix to the latest experienced RLS crashes, which should hopefully reach the nightly release as soon as possible.
LLVM: Add support for EABI-compliant libcalls on MSP430.
This change will allow rust code to have proper support for division
and multiplication using libgcc.
r? @alexcrichton
cc @awygle
Disallow ._ in float literal.
This patch makes lexer stop parsing number literals before `._`, as well as before `.a`. Underscore itself is still allowed like in `4_000_000.000_000_`.
Fixes a half part of #41723. The other is `""_`.
