bootstrap: Promote some build_steps comments to docs
No new content, just makes some comments readable when viewing the docs with `--document-private-items`.
Add localtime_r shim
- Implement ``localtime_r`` shim as mentioned in #2057
Note:
- ``tm_zone``, ``tm_gmtoff`` might not be consistent with ``libc::localtime_r`` as custom implementation is provided through ``chrono``. Due to the lack of daylight saving information in ``chrono``, ``is_dst`` value will always be ``-1``.
Fix ICE when there is a non-Unicode entry in the incremental crate directory
Fix the ICE that occurs when there is a non-Unicode entry in the incremental crate directory by replacing uses of `to_string_lossy` + `assert_no_characters_lost` with `to_str`. The added test would cause the compiler to ICE before this PR.
This option allows to pass environment variables to the interpreted program without needing to modify the host environment (which may have undesired effects in some cases).
The description was most accurate when it was still called rustbuild,
and I presume indeed did mostly run in CI. It has become something more
so try to describe it better for current-day usage.
Add an intrinsic for `ptr::from_raw_parts(_mut)`
Fixes#123174
cc `@CAD97` `@saethlin`
r? `@cjgillot`
As suggested in https://github.com/rust-lang/rust/pull/123190#issuecomment-2028717967, this adds a new `AggregateKind::RawPtr` for creating a pointer from its data pointer and its metadata.
That means that `slice::from_raw_parts` and friends no longer need to hard-code pointer layout into `libcore`, and because it no longer does union hacks the MIR is shorter and more amenable to optimizations.
fix normalizing in different `ParamEnv`s with the same `InferCtxt`
This PR changes the key of the projection cache from just `AliasTy` to `(AliasTy, ParamEnv)` to allow normalizing in different `ParamEnv`s without resetting caches. Previously, normalizing the same alias in different param envs would always reuse the cached result from the first normalization, which is incorrect if the projection clauses in the param env have changed.
Fixing this bug allows us to get rid of `InferCtxt::clear_caches`, which was only used by the `AutoTraitFinder`, because it requires normalizing in different param envs.
r? `@fmease`
