Add /SOURCELINK debug support on Windows
It would be useful to add support for the VC++ linker option /SOURCELINK. This option embeds a json file mapping local source file paths to URLs to enable debugging on machines that might not have source. Documentation is here.
/SOURCELINK requires asomewhat recent versions of MSVC, so Rust support probably requires a version test for MSVC or some opt-in mechanism.
Visiting for wg-debugging triage.
@wesleywiser or @michaelwoerister , can one of you figure out whether the requested feature would require a rustc command line option (and thus this requires an MCP), or if the requested feature is something we can unconditionally provide (assuming it uses a version test as described in the issue)?