[llvm-branch-commits] [flang] [llvm] [Flang] Move runtime library files to FortranRuntime. NFC (PR #110298)

[Peter Klausler via llvm-branch-commits]

klausler wrote:

> > A Fortran compiler and its runtime are tightly coupled; the compiler can only work with this runtime, this runtime can only be used by this compiler, and they share common API definitions and data structures.
> 
> So is c C/C++ compiler and its runtime(s). There is still a need to support cross-compilation and other build modes like `FLANG_EXPERIMENTAL_CUDA_RUNTIME`.
> 
> > I don't mind if you move the sources and headers that are used _only_ by the runtime into a new top-level directory, if you must. But moving common headers and sources used by _both_ the compiler and the runtime builds out of the compiler tree makes no sense to me.
> 
> As said, this was the result of the RFC. I can update the PR and leave them in `flang/`.

I am not in disagreement with your objectives.  But I think that you will be able to achieve them without scrambling the source locations so much that I won't be able to continue maintaining them upstream.

https://github.com/llvm/llvm-project/pull/110298