…=Kobzol

handle stage0 `cargo` and `rustc` separately

This change allows setting either `build.cargo` or `build.rustc` without requiring both to be set simultaneously, which was not possible previously.

To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.

Blocker for rust-lang#129152

Rollup of 8 pull requests

Successful merges:

 - rust-lang#126985 (Implement `-Z embed-source` (DWARFv5 source code embedding extension))
 - rust-lang#128935 (More work on `zstd` compression)
 - rust-lang#129134 (bootstrap: improve error recovery flags to curl)
 - rust-lang#129190 (Add f16 and f128 to tests/ui/consts/const-float-bits-conv.rs)
 - rust-lang#129416 (library: Move unstable API of new_uninit to new features)
 - rust-lang#129418 (rustc: Simplify getting sysroot library directory)
 - rust-lang#129459 (handle stage0 `cargo` and `rustc` separately)
 - rust-lang#129511 (Update minifier to 0.3.1)

r? `@ghost`
`@rustbot` modify labels: rollup

…=Kobzol

handle stage0 `cargo` and `rustc` separately

This change allows setting either `build.cargo` or `build.rustc` without requiring both to be set simultaneously, which was not possible previously.

To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.

Blocker for rust-lang#129152

…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#128919 (Add an internal lint that warns when accessing untracked data)
 - rust-lang#129134 (bootstrap: improve error recovery flags to curl)
 - rust-lang#129416 (library: Move unstable API of new_uninit to new features)
 - rust-lang#129459 (handle stage0 `cargo` and `rustc` separately)
 - rust-lang#129487 (repr_transparent_external_private_fields: special-case some std types)
 - rust-lang#129511 (Update minifier to 0.3.1)
 - rust-lang#129523 (Make `rustc_type_ir` build on stable)
 - rust-lang#129546 (Get rid of `predicates_defined_on`)

r? `@ghost`
`@rustbot` modify labels: rollup

…=Kobzol

handle stage0 `cargo` and `rustc` separately

This change allows setting either `build.cargo` or `build.rustc` without requiring both to be set simultaneously, which was not possible previously.

To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.

Blocker for rust-lang#129152

…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#129091 (add Box::as_ptr and Box::as_mut_ptr methods)
 - rust-lang#129134 (bootstrap: improve error recovery flags to curl)
 - rust-lang#129416 (library: Move unstable API of new_uninit to new features)
 - rust-lang#129459 (handle stage0 `cargo` and `rustc` separately)
 - rust-lang#129487 (repr_transparent_external_private_fields: special-case some std types)
 - rust-lang#129511 (Update minifier to 0.3.1)
 - rust-lang#129523 (Make `rustc_type_ir` build on stable)

r? `@ghost`
`@rustbot` modify labels: rollup

…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#129091 (add Box::as_ptr and Box::as_mut_ptr methods)
 - rust-lang#129134 (bootstrap: improve error recovery flags to curl)
 - rust-lang#129416 (library: Move unstable API of new_uninit to new features)
 - rust-lang#129459 (handle stage0 `cargo` and `rustc` separately)
 - rust-lang#129487 (repr_transparent_external_private_fields: special-case some std types)
 - rust-lang#129511 (Update minifier to 0.3.1)
 - rust-lang#129523 (Make `rustc_type_ir` build on stable)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#129459 - onur-ozkan:separate-stage0-bins, r=Kobzol

handle stage0 `cargo` and `rustc` separately

This change allows setting either `build.cargo` or `build.rustc` without requiring both to be set simultaneously, which was not possible previously.

To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.

Blocker for rust-lang#129152