[Openmp-commits] [openmp] [OpenMP] Use Clang resource dir only in bootstrapping build (PR #156018)

[Michael Kruse via Openmp-commits]

Meinersbur wrote:

I forgot that LLVM_RUNTIMES_BUILD does not imply LLVM_TREE_AVAILABLE (happens in non-boostrapping build: https://github.com/llvm/llvm-project/blob/8cc1d6fb2197bc02d778969fd81a712a25e9b9f5/runtimes/CMakeLists.txt#L97-L100). Re-added LLVM_TREE_AVAILABLE condition and switched the if/else to keep the condition simplier.

Please re-approve if you are OK with this change.

https://github.com/llvm/llvm-project/pull/156018