[llvm-branch-commits] [llvm] [CI] Migrate to runtimes build (PR #142696)

[Vlad Serebrennikov via llvm-branch-commits]

Endilll wrote:

> > It doesn't relate to multilib, I understand that, but does it mean we're going to test more than one runtime or that we'll test the same runtime multiple ways?
> 
> It's runtimes that we test in multiple ways (`-std=c++26` and `enable_modules=clang` currently). I felt multiconfig covered that and couldn't really think of a better name. If anyone else has better ideas I'd be happy to change it up.

Multiconfig in this context has some strong associations with CMake's Ninja Multi-Config generator for me. My suggestion is `needs_reconfig`.

https://github.com/llvm/llvm-project/pull/142696