I finally got some PowerPC output but found it hung (on the target). I suspected it might be that we're using an SPE rather than the more common EABI but quickly found that it is due to https://ghc.haskell.org/trac/ghc/ticket/7695, possibly to be fixed soon according to the clear status notes for 7.10.1 and in any case easily work roundable by providing a UTF-32.so . Further good news is that what we want to do is purely mathematical manipulating only bitmaps, already has an implementation with tests in another language and ought to lend itself well to Haskell according to my learned colleague. So we can now proceed with some gentle performance testing on both our product platforms. I assume that NGC is what you get by default. helloworld works with or without -fvia-C when it clearly uses power---gcc. Jon