[flang-commits] [clang] [flang] [flang][Frontend] Implement printing defined macros via -dM (PR #87627)

[Kelvin Li via flang-commits]

kkwli wrote:

@kparzysz Is it supposed to also print the predefined macros? Or only the user-defined macros?

https://github.com/llvm/llvm-project/pull/87627