My jenkins master is running on linux, and I have both mac as well as windows slave nodes. There is a "Tool locations" section that git / perforce and other tools allow customizing the location per-node, and this would be nice for RTC as well.

Currently, I am pretty much stuck using "scm" instead of "lscm" since it is the one common name that can be recognized across all three platforms. It would be nice to use the more efficient lscm though.