[llvm] [ORC-RT] Initial check-in for a new, top-level ORC runtime project. (PR #113499)

[Lang Hames via llvm-commits]

lhames wrote:

> The existing runtimes build is designed to only support building the runtimes with the just-built compiler, so it does not support multi configuration building with the host compiler.

Is there any desire to support multi-configuration builds with the host compiler? In the ORC runtime's case I'd expect this to work pretty well (I expect most if not all of the code to be standard C++ and a little custom assembly), but I know in general runtimes are often tightly coupled to their associated compilers.

https://github.com/llvm/llvm-project/pull/113499