In case anyone wanted to start writing haskell android code now, jhc fully supports android as a target. here is an app made with it
https://play.google.com/store/apps/details?id=org.metasepi.ajhc.android.cube this was made with Kiwamu's ajhc branch but code has been merged back into the main tree. On Wed, Jul 2, 2014 at 5:54 PM, Carter Schonwald <carter.schonw...@gmail.com> wrote: > This would probably be a great boon for those trying to use haskell for > Android and IOS right? how might the emulation setup work for those? > > > > > On Wed, Jul 2, 2014 at 2:20 PM, Carter Schonwald > <carter.schonw...@gmail.com> wrote: >> >> wow, this is great work! >> >> If theres a clear path to getting the generic tooling into 7.10, i'm all >> for it :) (and willing to help on concrete mechanical subtasks) >> >> >> On Wed, Jul 2, 2014 at 12:14 PM, Luite Stegeman <stege...@gmail.com> >> wrote: >>> >>> hi all, >>> >>> I've added some code [1] [2] to GHCJS to make it run Template Haskell >>> code on node.js, rather than using the GHC linker. GHCJS has supported TH >>> for a long time now, but so far always relied on native (host) code for it. >>> This is the main reason that GHCJS always builds native and JavaScript code >>> for everything (another is that Cabal Setup.hs scripts need to be compiled >>> to some host-runnable form, but that can also be JavaScript if you have >>> node.js) >>> >>> Now besides the compiler having to do twice the work, this has some other >>> disadvantages: >>> >>> - Our JavaScript code has the same dependencies (packages) as native >>> code, which means packages like unix or Win32 show up somewhere, depending >>> on the host environment. This also limits our options in choosing >>> JS-specific packages. >>> - The Template Haskell code runs on the host environment, which might be >>> slightly different from the target, for example in integer size or operating >>> system specific constants. >>> >>> Moreover, building native code made the GHCJS installation procedure more >>> tricky, making end users think about libgmp or libiconv locations, since it >>> basically required the same preparation as building GHC from source. This >>> change will make installing much easier and more reliable (we still have to >>> update the build scripts). >>> >>> How it works is pretty simple: >>> >>> - When any code needs to be run on the target (hscCompileCoreExpr, >>> through the Hooks API new in GHC 7.8), GHCJS starts a node.js process with >>> the thrunner.js [3] script, >>> - GHCJS sends its RTS and the Template Haskell server code [1] to >>> node.js, the script starts a Haskell thread running the server, >>> - for every splice, GHCJS compiles it to JavaScript and links it using >>> its incremental linking functionality. The code for the splice, including >>> dependencies that have not yet been sent to the runner (for earlier >>> splices), is then sent in a RunTH [4] message, >>> - the runner loads and runs the code in the Q monad, can send queries to >>> GHCJS for reification, >>> - the runner sends back the result as a serialized Template Haskell AST >>> (using GHC.Generics for the Binary instances). >>> >>> All Template Haskell functionality is supported, including recent >>> additions for reifying modules and annotations. I still need to clean up and >>> push the patches for the directory and process packages, but after that, the >>> TH code can read/write files, run processes and interact with them and make >>> network connections, all through node.js. >>> >>> Now since this approach is in no way specific to JavaScript, I was >>> wondering if there's any interest in getting this functionality into GHC >>> 7.10 for general cross compilation. The runner would be a native (target) >>> program with dynamic libraries (or object files) being sent over to the >>> target machine (or emulator) for the splices. >>> >>> Thanks to Andras Slemmer from Prezi who helped build the initial proof of >>> concept (without reification) at BudHac. >>> >>> cheers, >>> >>> Luite >>> >>> [1] >>> https://github.com/ghcjs/ghcjs/blob/414eefb2bb8825b3c4c5cddfec4d79a142bc261a/src/Gen2/TH.hs >>> [2] >>> https://github.com/ghcjs/ghcjs-prim/blob/2dffdc2d732b044377037e1d6ebeac2812d4f9a4/GHCJS/Prim/TH/Eval.hs >>> [3] >>> https://github.com/ghcjs/ghcjs/blob/414eefb2bb8825b3c4c5cddfec4d79a142bc261a/lib/etc/thrunner.js >>> [4] >>> https://github.com/ghcjs/ghcjs-prim/blob/2dffdc2d732b044377037e1d6ebeac2812d4f9a4/GHCJS/Prim/TH/Types.hs#L29 >>> >>> _______________________________________________ >>> Glasgow-haskell-users mailing list >>> Glasgow-haskell-users@haskell.org >>> http://www.haskell.org/mailman/listinfo/glasgow-haskell-users >>> >> > > > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users > -- John Meacham - http://notanumber.net/ _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users