Tracking Issue for c-char-type

[azhogin]

This is a tracking issue for the -Zc-char-type='unsigned|signed|default' (configurable c_char override to i8/u8).
The feature gate for the issue is #![feature(c_char_type)].

Requested by Rust-For-Linux as gcc/clang -funsigned-char analog: Rust-for-Linux/linux#355.

About tracking issues

Tracking issues are used to record the overall progress of implementation.
They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions.
A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature.
Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.
Discussion comments will get marked as off-topic or deleted.
Repeated discussions on the tracking issue may lead to the tracking issue getting locked.

Steps

• Implementation PR: -Zc-char-type=unsigned|signed|default flag for c_char->u8/i8 selection override #138290
• Adjust documentation (see instructions on rustc-dev-guide)
• Formatting for new syntax has been added to the Style Guide (nightly-style-procedure)
• Stabilization PR (see instructions on rustc-dev-guide)

Unresolved Questions

Implementation history

Implementation PR: #138290