It should be possible to override the dsymutil path

[sfackler]

The compiler currently invokes dsymutil directly, but a cross compilation toolchain may have it located under a different name like x86_64-apple-darwin15-dsymutil. There should be a compiler flag to override it like there is for the linker.

[alexcrichton]

The "best" option here would actually be to vendor llvm-dsymutil the way we do llvm-ar (just link to it). At a first glance, however, it looks like it may not be librarified so we may not be able to benefit :(

This would likely manifest itself as -C dsymutil=foo the same way -C linker=foo exists.

[steveklabnik]

Triage: not aware of any changes here