Hi Wookey, the great Colin Watson has already done a whole great job in this! https://lists.debian.org/debian-haskell/2014/04/msg00000.html
I think you will find interesting his work, it is for 7.8 but I think with some backports can be done with ghc 7.6 too... Did you already saw the work? best regards Gianfranco Il Venerdì 4 Aprile 2014 16:21, Wookey <[email protected]> ha scritto: On Apr 3, 2014 4:45 PM, "Wookey" <[2][email protected]> wrote: > >I'm involved as a Linaro Google summer of code (GSOC) admin as well as >Debian GSOC mentor. (linaro is an arm linux/open source non-profit >engineering organisation if you've never heard of it http://linaro.org/ >who have been paying for me to do a lot of good stuff in Debian) > > We have one student proposing to port ghc to arm64, which is a very > useful and interesting piece of work, which I'd like to see happen, > but I know absolutely nothing about haskell so would need a > co-mentor. (but obviously I do know about arm64/aarch64, porting in > general and debian bootstrapping/crossbuilding machinery). > > Can anyone help me as a co-mentor in the form of 'haskell techincal >advisor' > > First, though, the immediate need is to review the proposal and > talk to the student. I can do that but I need some details on how > big a job it is and some way to determine if we think the student > is up to the task. I don't feel that I know enough to ask sensible > questions, or judge the answers right now... > > I'm in a hurry on this as decisions on slots need to be made by the > end of the weekend, so do please get in touch forthwith if you can > help me with that (no need to commit to mentoring as well, but that > would be good :-) > > For this project to happen it will need someone with a clue to > volunteer as mentor (i.e apart from me), for us to judge the > student as reasonably likely to get somewhere in 3 months (in which > case we will ask for a slot), and for Linaro to then be allocated a > slot (this project will be in the 'would be nice', as opposed to > 'core projects' category. > > GSOC mentoring is very satisfying in my experience. You get to > teach people about free software and the community, as well as the > technical task at hand, and if you do that well they are likely to > stay around and do useful stuff for years to come. > > The timeline is here: > [3]http://www.google-melange.com/gsoc/events/google/gsoc2014 > > Our project ideas page, just to give you some idea of what's going on: > [4]https://wiki.linaro.org/SummerOfCode2014/ProjectIdeas > > ghc porting comes under the "AArch64 porting" heading. > > Below is part of the proposal the guy sent in. You can tell me if > he has any idea what he's doing or not (he originally applied to do > something entirely different, but was told it was already done so > suggested this instead). He appears to have a reasonable idea of > what to do, and have got stuck in in the short time he had before > the proposal deadline. I have no idea if this port is a realistic > task for a student in 3 months. Is it? > > Any comments people have would be of interest, and of course if you are > able to say you'll help out that would be great. How much time it takes > varies enormously depending how good the student is. I've had ones that > are way smarter than me and needed no help at all, and ones who needed > quite a lot of handholding. > > > ---------------- > Name: Kishor Mohite > Email: [6][email protected] > > 4) Implementation > > i) It is quite exciting and challenging to port the software used > everyday by developers to a completely new architecture. In the initial > stages I will pick the Glasgow Haskell Compiler for porting as it is not > ported yet to AArch64. > > ii) I am currently working to get unregistered build of ghc working on > Aarch64. First steps for which are compiling intermediate C (.hc) files > using vanilla C. Unregistered build costs about a factor of two in > performance but it is just a step to get full registered port. Full > registered port gets bootstrapped with unregistered build on a new > architecture. > > iii) I have been able to setup a cross compiler toolchain on Ubuntu > (x86_64) which will be the host machine for the porting purpose. Also I > have been able to get foundation model for ARMv8 working with this > kernel image and this rootfs disk image, though I am not able to ssh to > the foundation model from host machine. I have cross compiled some C > programs on host machine and able to get them working on a foundation > model. > > iv) I have made changes in ghc ./configure script to recognize > aarch64-unknown-linux as a target platform. Script is running with > x86_64 as host and build architecture and aarch64 as target > architecture. configure stops with error "configure: error: building > ghc-pwd failed", now looking into that issue. > > 5) Timeline > > i) Last week of April and First week of May: > > My end term examinations will end in third week of April after which I > will be completely available for the project. I will give two weeks to > study the code which is ported already by Linaro Engineers studying > carefully the coding style and understanding the actual code with the > help of mentor. At the same time I will read the documentation written > by Linaro Engineers and get to know about detailed working of 64 bit > execution state of ARMv8 as I have already worked on MIPS it will not > take much time. > > ii) Second week of May to First week of June: > > From the second week I will start working on ghc, by the time I will > have a complete development environment setup. First working to get > unregistered build working on a new architecture which might take some > time because of minor porting issues that may arise. > > iii) Second week of June and Third week of June: > > Unregistered build of ghc will be ready for AArch64 by the end of third > week of June and will be completely tested for any issues in this > period. > > iv) Last week of June: > > Project will be ready for submitting in mid term evaluations. > > v) First week of July to Second week of August: > > In the second phase I will work on making completely registered build > for AArch64 using unregistered build for bootstrapping purpose and > resolving any issues which will arise while building in this period. And > if it doesn't take that long to build registerised ghc I will pick one > more project, most probably gnu-smalltalk for porting to aarch64. > > vi) Third week of August: > > Required code samples will be provided to Google. > > ------------------------- > > Wookey > -- > Principal hats: �Linaro, Emdebian, Wookware, Balloonboard, ARM > [7]http://wookware.org/ > >References > > Visible links > 1. http://rrt.sc3d.org/ > 2. mailto:[email protected] > 3. http://www.google-melange.com/gsoc/events/google/gsoc2014 > 4. https://wiki.linaro.org/SummerOfCode2014/ProjectIdeas > 5. >https://www.google-melange.com/gsoc/proposal/review/org/google/gsoc2014/kishorm23/5629499534213120?verified=True > 6. mailto:[email protected] > 7. http://wookware.org/ > >----- End forwarded message ----- >Wookey >-- >Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM >http://wookware.org/ > > >-- >To UNSUBSCRIBE, email to [email protected] >with a subject of "unsubscribe". Trouble? Contact [email protected] >Archive: https://lists.debian.org/[email protected] > > > >
