[llvm] Improve compiler-rt build structure and export compilation info (PR #190088)

[Aaron Siddhartha Mondal via llvm-commits]

aaronmondal wrote:

Not sure whether I'm a fan of the new rules. While concise, it deviates from the CMake build quite a bit. Wouldn't the logic in there (which lists the files explicitly) be 1:1 translateable directly? While more verbose it would also be more obvious from just looking at the build file.

It's currently unclear to me whether this abstraction has more benefits than drawbacks.

https://github.com/llvm/llvm-project/pull/190088