[flang-commits] [clang] [flang] [llvm] [mlir] [polly] [CMake][LLVM] Add PCH infrastructure and LLVMSupport PCH (PR #176420)

[Jakub Kuderski via flang-commits]

kuhar wrote:

@aengelke how do we enable PCH? Is there some standard cmake flag or an llvm-specific one?

https://github.com/llvm/llvm-project/pull/176420