std: move stdio to `sys`
As per #117276, this moves the platform definitions of `Stdout` and friends into `sys`. This PR also unifies the UNIX and Hermit implementations and moves the `__rust_print_err` function needed by libunwind on SGX into the dedicated module for such helper functions.
doctests: fix merging on stable
Fixes#137898
The generated multi-test harness relies on nightly-only APIs, so the only way to run it on stable is to enable them.
To prevent the executing test case from getting at any of the stuff that the harness uses, they're built as two separate crates. The test bundle isn't built with RUSTC_BOOTSTRAP, while the runner harness is.
This prevents the included test case from getting at nightly-only
features when run on stable. The harness builds with
RUSTC_BOOTSTRAP, but the bundle doesn't.
Fixes#137898
The generated multi-test harness relies on nightly-only APIs,
so the only way to run it on stable is to enable them. Since
tests that use crate attrs don't be merged, there's no way to use
nightly-only features on it anyway.
As per #117276, this moves the platform definitions of `Stdout` and friends into `sys`. This PR also unifies the UNIX and Hermit implementations and moves the `__rust_print_err` function needed by libunwind on SGX into the dedicated module for such helper functions.
Windows: Don't link std (and run-make) against advapi32, except on win7
Std no longer depends on any functionality provided by advapi32, so we can remove it from the list of external libraries we link against. Except, the win7 targets do still rely on advapi32-provided functionality. This PR therefore moves linking against it to only occur on win7 targets, so that no new uses of it slip in without being noticed.
Apply dllimport in ThinLTO
This partially reverts https://github.com/rust-lang/rust/pull/103353 by properly applying `dllimport` if `-Z dylib-lto` is passed. That PR should probably fully be reverted as it looks quite sketchy. We don't know locally if the entire crate graph would be statically linked.
This should hopefully be sufficient to make ThinLTO work for rustc on Windows.
r? ``@wesleywiser``
---
Edit: This PR is changed to just generally revert https://github.com/rust-lang/rust/pull/103353.
Rollup of 12 pull requests
Successful merges:
- #136127 (Allow `*const W<dyn A> -> *const dyn A` ptr cast)
- #136968 (Turn order dependent trait objects future incompat warning into a hard error)
- #137319 (Stabilize `const_vec_string_slice`)
- #137885 (tidy: add triagebot checks)
- #138040 (compiler: Use `size_of` from the prelude instead of imported)
- #138084 (Use workspace lints for crates in `compiler/`)
- #138158 (Move more layouting logic to `rustc_abi`)
- #138160 (depend more on attr_data_structures and move find_attr! there)
- #138192 (crashes: couple more tests)
- #138216 (bootstrap: Fix stack printing when a step cycle is detected)
- #138232 (Reduce verbosity of GCC build log)
- #138242 (Revert "Don't test new error messages with the stage 0 compiler")
r? `@ghost`
`@rustbot` modify labels: rollup
bootstrap: Fix stack printing when a step cycle is detected
When bootstrap detects a step dependency cycle (which represents a bootstrap bug), it is supposed to print out the contents of the step stack as part of its panic message.
However, while investigating #138205 it was found that bootstrap was actually printing out several copies of `Any { .. }`, because that is the Debug implementation for `dyn Any`. This is sadly not very helpful.
This PR fixes that problem by introducing a `trait AnyDebug: Any + Debug` that delegates to the underlying type's Debug implementation, while still allowing downcasting via Any.
---
The fixed behaviour can be verified manually (and is tested automatically) via a new dummy command, `./x run cyclic-step`:
```
$ x run cyclic-step
Building bootstrap
Finished `dev` profile [unoptimized] target(s) in 0.02s
thread 'main' panicked at src/bootstrap/src/core/builder/mod.rs:1521:17:
Cycle in build detected when adding CyclicStep { n: 0 }
CyclicStep { n: 0 }
CyclicStep { n: 1 }
CyclicStep { n: 2 }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Build completed unsuccessfully in 0:00:00
```
depend more on attr_data_structures and move find_attr! there
r? ``@oli-obk``
This should be an easy one. It just moves some imports around. This is necessary for other changes that I'm working on not to have import cycles. However, it's an easy one to just merge on its own.
Move more layouting logic to `rustc_abi`
Move all `LayoutData`-constructing code to `rustc_abi`:
- Infaillible operations get a new `LayoutData` constructor method;
- Faillible ones get a new method on `LayoutCalculator`.
compiler: Use `size_of` from the prelude instead of imported
Use `std::mem::{size_of, size_of_val, align_of, align_of_val}` from the prelude instead of importing or qualifying them. Apply this change across the compiler.
These functions were added to all preludes in Rust 1.80.
r? ``@compiler-errors``
