[PATCH] D36501: Add flag to request Clang is ABI-compatible with older versions of itself

[Paul Robinson via Phabricator via cfe-commits]

probinson added a comment.

I would prefer a diagnostic if PS4 && >3.2.  Whether you map "latest" to 3.2 or diagnose that also, up to you, I'm okay either way.


Repository:
  rL LLVM

https://reviews.llvm.org/D36501