This allows using the `./configure` script to enable rustbuild to compile
multiple musl targets at once. We'll hopefully use this soon on our bots to
produce a bunch of targets.
`BufRead` comments, in the `Seek` trait implementation, was talking
about allocating 8 *ebibytes*. It was a typo, the correct unit is
*exbibytes*, since *ebibytes* don't even exist. The calculation is
correct, though.
stop having identity casts be lexprs
that made no sense (see test), and was incompatible with borrowck.
Fixes#36936.
beta-nominated since (bad) regression.
r? @eddyb
The previous panic message delivered when a musl target was specified
but musl-root was not specified incorrectly instructed the user to add
the musl-root key to the "build" section of config.toml. The key
actually needs to be added to the "rust" section.
In #36292, support was added to target musl libc for ARM targets using
rustbuild. Specifically, that change allowed the addition of per-target
"musl-root" options in the rustbuild config.toml so that multiple
targets depending on musl could be built. However, that implementation
contained a couple of omissions: the musl-root option was added to the
config, but was never added to the TOML parsing, and therefore was not
actually being loaded from config.toml. This commit rectifies that and
allows successful building of musl-based ARM targets.
Refactoring/bugfixing around definitions for struct/variant constructors
d917c364ad separates definitions for struct/variant constructors living in value namespace from struct/variant type definitions.
adfb37827b fixes cross-crate resolution of reexports reexporting half-items, like struct constructors without struct type or types without constructor. Such reexports can appear due to glob shadowing.
Resolution now is not affected by the order in which items and reexports are decoded from metadata (cc https://github.com/rust-lang/rust/issues/31337#issuecomment-183996263). `try_define` is not used during building reduced graph anymore.
500 lines of this PR are tests for this exotic situation, the remaining line diff count is actually negative! :)
c695d0c875 (and partially aabf132de0) moves most of pattern resolution checks from typeck to resolve (except those checking for associated items), uses the same wording for pattern resolution error messages from both typeck and resolve and makes the messages more precise.
11e3524e5a fixes seemingly incorrectly set `NON_ZERO_SIZED` attributes for struct/variant ctors in const eval.
4586fea253 eliminates `ty::VariantKind` in favor of `def::CtorKind`. The logic is that variant kinds are irrelevant for types, they make sense only when we deal with constructor functions/constants. Despite that `VariantDefData` still keeps a copy of `CtorKind`, but it's used only for various kinds of pretty-printing (and for storing in metadata).
aabf132de0 is mostly a cleanup of various impossible or improperly used definitions, and other small definition cleanups.
cc @jseyfried
r? @eddyb
rustc: Try again to disable NEON on armv7 linux
This is a follow-up to #35814 which apparently didn't disable it hard enough. It
looks like LLVM's default armv7 target enables NEON so we'd otherwise have to
pass `-neon`, but we're already enabling armv7 with `+v7` supposedly, so let's
try just telling LLVM that the armv7 target is arm and then enable features
selectively.
Closes#36913
This is a follow-up to #35814 which apparently didn't disable it hard enough. It
looks like LLVM's default armv7 target enables NEON so we'd otherwise have to
pass `-neon`, but we're already enabling armv7 with `+v7` supposedly, so let's
try just telling LLVM that the armv7 target is arm and then enable features
selectively.
Closes#36913
add Thumbs to the compiler
this commit adds 4 new target definitions to the compiler for easier
cross compilation to ARM Cortex-M devices.
- `thumbv6m-none-eabi`
- For the Cortex-M0, Cortex-M0+ and Cortex-M1
- This architecture doesn't have hardware support (instructions) for
atomics. Hence, the `Atomic*` structs are not available for this
target.
- `thumbv7m-none-eabi`
- For the Cortex-M3
- `thumbv7em-none-eabi`
- For the FPU-less variants of the Cortex-M4 and Cortex-M7
- On this target, all the floating point operations will be lowered
software routines (intrinsics)
- `thumbv7em-none-eabihf`
- For the variants of the Cortex-M4 and Cortex-M7 that do have a FPU.
- On this target, all the floating point operations will be lowered
to hardware instructions
No binary releases of standard crates, like `core`, are planned for
these targets because Cargo, in the future, will compile e.g. the `core`
crate on the fly as part of the `cargo build` process. In the meantime,
you'll have to compile the `core` crate yourself. [Xargo] is the easiest
way to do that as in handles the compilation of `core` automatically and
can be used just like Cargo: `xargo build --target thumbv6m-none-eabi`
is all that's needed.
[Xargo]: https://crates.io/crates/xargo
---
cc @brson @alexcrichton
