-C target-cpu=help won’t print anything unless compilation reaches trans

[nagisa]

target-cpu=help
Selects a target processor. If the value is 'help', then a list of available CPUs is printed.

$ rustc -C target-cpu=help
error: no input filename given

It works if file compiles and manages to reach trans, though.

[steveklabnik]

Triage: same issue today.

[bluss]

This is basically #30961

[nagisa]

I disagree. The linked issue is only complaining about us suggesting to use llc whereas here the issue is about option value working this or another way depending on whether a specific stage of compilation is reached.

[ranma42]

This is going to be affected by #31709, as it moves the initialisation of LLVM to a much earlier stage.

[xen0n]

Random triage: already fixed by #31709.

[bluss]

Thanks, this is now fixed. (The fix is in Rust 1.13 at least, may be earlier).