Do we have already a mean to have rustc emit the debug information as a separate file, if not, would be acceptable to add this feature?
(maybe try asking on users.rust-lang.org for greater visibility)
Users or internals?
Actually I found https://github.com/rust-lang/rust/issues/34651 :)
well, asking "can rustc do that" is a users question I think, then if the answer is no, "would it be acceptable to add this feature" is internals material
splitting can be done as a post-processing step. is there anything that requires rustc to produce a split debug directly?
The improved link time, assuming it would work like it does for clang and gcc :)