`rustc --print target-features` doesn't print `crt-static`

[petrochenkov]

despite it being usable in -C target-feature.

This issue has been assigned to @ryzokuken via this comment.

[ryzokuken]

@rustbot claim

[xabxx]

@ryzokuken hi there. Are you still working on this? :)

[ryzokuken]

@xabxx couldn't find the time to look into this deeper, sorry. Feel free to pick it up.

[aszenz]

@petrochenkov
The target features for a particular architecture are taken from llvm in llvm_util.rs line 341.

The crt-static seems to be a rust-specific target feature that is not present in llvm feature table, I think its the only one right now. I have made a basic naive pr which just prints it out since I'm hoping to get feedback for improving it