Note that RUSTFLAGS_BOOTSTRAP should always be added to the end of
RUSTFLAGS to be actually effective (e.g., if we have `-Dwarnings` in
RUSTFLAGS, passing `-Awarnings` from RUSTFLAGS_BOOTSTRAP should override it).

Signed-off-by: onur-ozkan <[email protected]>

To get GNU/Hurd support, so that CI of external repositories (e.g. getrandom)
can build std.

…piler-errors

improve the suggestion of `generic_bound_failure`

- Fixes rust-lang#115375
- suggest the bound in the correct scope: trait or impl header vs assoc item. See `tests/ui/suggestions/lifetimes/type-param-bound-scope.rs`
- don't suggest a lifetime name that conflicts with the other late-bound regions of the function:
```rust
type Inv<'a> = *mut &'a ();
fn check_bound<'a, T: 'a>(_: T, _: Inv<'a>) {}
fn test<'a, T>(_: &'a str, t: T, lt: Inv<'_>) { // suggests a new name `'a`
    check_bound(t, lt); //~ ERROR
}
```

…acrum

add test for wasm linker override=clang

addressing rust-lang#109728

Bump libc dependency

To get GNU/Hurd support, so that CI of external repositories (e.g. getrandom) can build std.

…rap-on-bootstrap, r=albertlarsan68

Add RUSTFLAGS_BOOTSTRAP to RUSTFLAGS for bootstrap compilation

Adds `RUSTFLAGS_BOOTSTRAP` to `RUSTFLAGS` for bootstrap compilation when `RUSTFLAGS_BOOTSTRAP` exists in the environment. With this PR, `RUSTFLAGS_BOOTSTRAP` will affect every build(as we already do for rustc and std) compiled with stage0 compiler.

Resolves rust-lang#94234