dep-info for link is wrong when --emit is given a path.

[TheDreadedAndy]

When compiling with --emit link=path,dep-info, the resulting dependency file is wrong.

Instead of containing the given path for link, the dependency file will contain the platform dependent default name for that link option. For example, I passed rustc the flags --crate-type proc-macro --emit link=rust/build/output/libforward.so,dep-info=rust/build/output/forward.d, and the resulting dependency file contained libforward.so: rust/proc-macro/forward/forward.rs instead of rust/build/output/libforward.so: rust/proc-macro-forward/forward.rs.

I observed this issue with both the rlib and proc-macro crate types on nightly 1.64.0.

Similar issue: #68839

[Enselic]

Triage: Can you still reproduce after #68839 was fixed?

[jieyouxu]

Triage: closing due to missing recent repro, please feel free to reopen if this is still a problem.