July Edition — In July I’ve been playing around a bit more with -target. At this point I believe the best solution is to have a minimal ghc that doesn’t ship with any libraries; and all libraries are built on demand per target. We will likely want to pre-build and ship the Runtime…

June Edition — This post will be quite brief. I wasn’t able to carve out much time in June as my wife an I have just welcomed a new human being. As the 8.6.1 alpha was just announced, I’m trying to finish adapting the llvm-ng backend as quickly as I can and build a fresh set of pre-built ghc 8.6.1 cross compilers.

May Edition — With GHC 8.6.1 being released soon, the windows for patches was closing fast. While not necessarily cross compilation related, I was still able to get a patch in the infamous load command size limit issue on macOS. Interestingly windows suffers from a similar issue. On windows we have a command…

March & April Edition — Due to some travel in April, I wasn’t able to write up an update for what happened in March. So today we’ll have a combined update for March and April. Alp Mestanogullari has finished hadrian#531, which was a clean up of my earlier hadrian#445. As such we now build relocatable…

haskell.sg Meetup — March 2018 — At the haskell.sg March Meetup I gave a short presentation on how to cross compile dhall-json to raspberry pi, and the issues you might run into. …

February Edition — While I didn’t manage to find the time to write anything here in February, I did make some progress on the cross compilation front. cabal can now be invoked outside of the source folder, and tries to not pollute the source tree with generated files anymore (haskell/cabal#4874). The --with-PROG flag…

January Edition — After setting up hackage.mobilehaskell.org with S3 and fastly backing in December, I automated the overlay generation in January. This means that any patches pushed to the overlay repository will be automatically reflected in the overlay after a few minutes. Now all that’s missing is patches for common packages! I’ve also managed to write a patch for cabal so that new-build properly propagates --with-PROG flags into dependencies. This should make it work much better for cross compilation, once the patch is merged. I’m hopeful this will happen soon.

Nix is a purely functional package manager and NixOS is a purely functional Linux distribution. I have been running a NixOS server for a while now, and been quite happy with the configuration. However updating it has essentially been copying the configuration.nix file over and calling nixos-rebuild switch --upgrade. This…

haskell.sg Meetup — January 2018 — At the haskell.sg January Meetup I presented building Android apps with Haskell yesterday. As we have recordings set up for a while now, you can follow it below. The talk is rather short and will only outline how to install the cross compilers, setup an Android app and call Haskell…