Matthew Pickering
I added the wiki page now: https://ghc.haskell.org/trac/ghc/wiki/Building/InGhci
Do you mean just adding the .ghci file? It seems that this might be something that would be good to add to hadrian so that it can control the locations of the object files rather than splurging them over the build tree.
Just adding the .ghci file is a start. However, ideally it would be something that will be more resistant to bitrotting that we might even be able to test. For instance, a shell script or build system rule that can generate the .ghci file from GHC's cabal file and launch ghc --interactive. We could then test this during CI as I think there is enough interest in this workflow that we should really try to support it. Cheers, - Ben