Commit Graph

8 Commits

Author SHA1 Message Date
Kevin Reid
d2ed8cf661 Optionally add type names to TypeIds.
This feature is intended to provide expensive but thorough help for
developers who have an unexpected `TypeId` value and need to determine
what type it actually is. It causes `impl Debug for TypeId` to print
the type name in addition to the opaque ID hash, and in order to do so,
adds a name field to `TypeId`. The cost of this is the increased size of
`TypeId` and the need to store type names in the binary; therefore, it
is an optional feature.

It may be enabled via `cargo -Zbuild-std -Zbuild-std-features=debug_typeid`.
(Note that `-Zbuild-std-features` disables default features which you
may wish to reenable in addition; see
<https://doc.rust-lang.org/cargo/reference/unstable.html#build-std-features>.)

Example usage and output:

```
fn main() {
    use std::any::{Any, TypeId};
    dbg!(TypeId::of::<usize>(), drop::<usize>.type_id());
}
```

```
TypeId::of::<usize>() = TypeId(0x763d199bccd319899208909ed1a860c6 = usize)
drop::<usize>.type_id() = TypeId(0xe6a34bd13f8c92dd47806da07b8cca9a = core::mem::drop<usize>)
```

Also added feature declarations for the existing `debug_refcell` feature
so it is usable from the `rust.std-features` option of `config.toml`.
2025-02-11 18:42:19 -08:00
Zalathar
bae25968dd Make profiler_builtins an optional dependency of sysroot, not std
This avoids unnecessary rebuilds of std (and the compiler) when
`build.profiler` is toggled off or on.
2024-10-17 22:08:36 +11:00
bors
80d8270d84 Auto merge of #125016 - nicholasbishop:bishop-cb-112, r=tgross35
Update compiler_builtins to 0.1.114

The `weak-intrinsics` feature was removed from compiler_builtins in https://github.com/rust-lang/compiler-builtins/pull/598, so dropped the `compiler-builtins-weak-intrinsics` feature from alloc/std/sysroot.

In https://github.com/rust-lang/compiler-builtins/pull/593, some builtins for f16/f128 were added. These don't work for all compiler backends, so add a `compiler-builtins-no-f16-f128` feature and disable it for cranelift and gcc.
2024-07-29 07:41:33 +00:00
Nicholas Bishop
ecf2963baf Update compiler_builtins to 0.1.114
The `weak-intrinsics` feature was removed from compiler_builtins in
https://github.com/rust-lang/compiler-builtins/pull/598, so dropped the
`compiler-builtins-weak-intrinsics` feature from alloc/std/sysroot.

In https://github.com/rust-lang/compiler-builtins/pull/593, some
builtins for f16/f128 were added. These don't work for all compiler
backends, so add a `compiler-builtins-no-f16-f128` feature and disable
it for cranelift and gcc. Also disable it for LLVM targets that don't
support it.
2024-07-28 20:43:07 -04:00
Chris Denton
e136f08a6f
Add experimental raw-dylib feature to std
For Windows, this allows defining imports without needing the user to have import libraries. It's intended for this to become the default.
2024-07-05 16:11:25 +00:00
Dion Dokter
9ab0af820d Add flag to sysroot 2024-05-11 14:31:55 +02:00
Amanieu d'Antras
4a9f292e50 Expose compiler-builtins-weak-intrinsics feature for -Zbuild-std
This was added in rust-lang/compiler-builtins#526 to force all
compiler-builtins intrinsics to use weak linkage.
2023-06-23 11:15:34 +01:00
John Kåre Alsaker
fd4c81f4c1 Add a sysroot crate to represent the standard library crates 2023-04-25 13:40:36 +02:00