Haskell: How to only generate .hi file with ghc?

Question

I would like to generate an .hi interface file and only that (no object file, no code generation at all).

I tried

ghc -         


        

Answer 1

Around 2014, there was an option added to GHC specifically for this. Now, you can invoke:

ghc -fno-code -fwrite-interface ...

It actually speeds up compilation by about a quarter in some cases.