Allow combining `--help -C help -Z help -W help` in one invocation

[jyn514]

Proposal

Current, passing any number of flags after --help acts as if the remaining flags are ignored. For rust-lang/rust#98977, it would be convenient if there were a way to get all help output at once.

I propose that rustc --help -C help be changed to behave the same as rustc --help && rustc -C help to make this easier. Ditto for -Z help and -W help.

I would expect these to be printed in the order they're specified on the command line, rather than in some fixed order.

Mentors or Reviewers

@jyn514

Process

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[rustbot]

Important

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cc @rust-lang/compiler

[Urgau]

@rustbot second

[rustbot]

The final comment period is now complete, this major change is now accepted. 🎉

As the automated representative, I want to express gratitude to the author for their work and everyone else who contributed to this major change proposal.

If you think this major change shouldn't have been accepted, feel free to remove the major-change-accepted label and reopen this issue.

Note

Further progress is now tracked over at rust-lang/rust#150442.