1e6fe5855a
library: Move `CStr` to libcore, and `CString` to liballoc Closes https://github.com/rust-lang/rust/issues/46736 Interesting points: - Stability: - To make `CStr(ing)` from libcore/liballoc unusable without enabling features I had to make these structures unstable, and reexport them from libstd using stable type aliases instead of `pub use` reexports. (Because stability of `use` items is not checked.) - Relying on target ABI in libcore is ok: - https://github.com/rust-lang/rust/pull/94079#issuecomment-1044263371 - `trait CStrExt` (UPDATE: used only in `cfg(bootstrap)` mode, otherwise lang items are used instead) - https://github.com/rust-lang/rust/pull/94079#issuecomment-1047863450 - `strlen` - https://github.com/rust-lang/rust/pull/94079#issuecomment-1047863450 Otherwise it's just a code move + some minor hackery usual for liballoc in `cfg(test)` mode.