Re: Error building ghc on raspberry pi.
Guys, I've installed raspbian into ubuntu chroot on my panda. Now to simulate what GHC detects on your hardware, could you be so kind and send me output of: uname -m uname -r uname -s uname -v this looks like a needed info for config.guess to detect machine hardware well. Also if you send me output of: sh config.guess it would be great. Everything of course run on your rpi board! Thanks, Karel ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Master thesis
Hi, I am looking to hack on ghc/haskell for my master thesis. What are some areas that I should be looking into? Any suggestions are welcome. ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: What is the scheduler type of GHC?
On 16/01/13 08:32, Magicloud Magiclouds wrote: Hi, Just read a post about schedulers in erlang and go lang, which informed me that erlang is preemptive and go lang is cooperative. So which is used by GHC? From ghc wiki about rts, if the question is only within haskell threads, it seems like cooperative. GHC is pre-emptive, but see http://hackage.haskell.org/trac/ghc/ticket/367. Cheers, Simon ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Master thesis
Shameless plug: Cloud Haskell. See the links below for a list of open issues, some really complex, some really simple. Not sure if any are suitable for a master thesis, but feel free to look and see if there's anything meaty enough. https://github.com/haskell-distributed/distributed-process/issues https://github.com/haskell-distributed/distributed-process-platform/issues https://github.com/haskell-distributed/distributed-process-platform/wiki/Contributing (same guidelines apply for both projects) Versioning and conversion of serialized types (between versions) would be a boon to us if you could think of a neat way to do that. It would also come in handy for dphd I'm sure - see distributed-process-static and https://github.com/haskell-distributed/distributed-process/issues/106 for some of the reasons why we might want that. On 16 Jan 2013, at 09:11, Vikraman wrote: Hi, I am looking to hack on ghc/haskell for my master thesis. What are some areas that I should be looking into? Any suggestions are welcome. ___ 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
Re: Error building ghc on raspberry pi.
I looked at that route - the issue is that the emulator only has 256M of RAM (and that's not changeable) - so there are going to be build issues with the GHC tool chain - it was then that I moved to real hardware. Neil On 15 Jan 2013, at 17:01, rocon...@theorem.ca wrote: On Tue, 15 Jan 2013, Thijs Alkemade wrote: Op 15 jan. 2013, om 17:36 heeft rocon...@theorem.ca het volgende geschreven: Okay, I tried: SRC_HC_OPTS= -H64m -Rghc-timing -optc-mfloat-abi=hard -optc-march=armv6 -optc-mfpu=vfp -optlc=-mattr=+vfp2 GhcStage1HcOpts= -O -fllvm GhcStage2HcOpts= -O0 -fllvm GhcLibHcOpts = -O -fllvm -optlc-float-abi=hard and I got the same error at a different build step. I'm not sure if it is earlier or later. It seems still not everything is using the hard-float ABI. ===--- building final phase make -r --no-print-directory -f ghc.mk phase=final all HC [stage 1] utils/hsc2hs/dist-install/build/tmp/hsc2hs /usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses VFP register arguments, utils/hsc2hs/dist-install/build/Main.o does not /usr/bin/ld: failed to merge target specific data of file utils/hsc2hs/dist-install/build/Main.o ... Did you do a `make clean` first? If not, try removing just (some of) the offending .o files, and see if rebuilding just those results in the same error. I did a make clean first I'm afarid. -- Russell O'Connor http://r6.ca/ ``All talk about `theft,''' the general counsel of the American Graphophone Company wrote, ``is the merest claptrap, for there exists no property in ideas musical, literary or artistic, except as defined by statute.'' ___ 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
Re: Error building ghc on raspberry pi.
Ok - I'll put up a machine in a DMZ sometime later today (RPi just arrived by post) . I'll make it available on an non-standard ssh port - I suggest access via ssh-key only. If you want to email me the appropriate line for .ssh/authorizedkeys please do. If you want to encrypt it with gpg, that's fine - use key id FF677414 (neil.dav...@pnsol.com) Neil On 15 Jan 2013, at 17:16, Karel Gardas karel.gar...@centrum.cz wrote: Well, if you make some board available in DMZ I'm certainly interested to run at least configure on it from GHC HEAD to see what we need to hack in order to add support for RPi into GHC HEAD. Unfortunately GHC HEAD is now in a wrong state w.r.t. LLVM based build, but Austin is working on this. I think I can hack support for RPi in the meantime for testing later on fixed GHC HEAD LLVM build... Karel On 01/15/13 06:07 PM, rocon...@theorem.ca wrote: In theory we could try a couple variations of builds at the same time. But at the moment, I'm running low on ideas on what to try. I just got the, extensive, raspbian patches for 7.4.1 and I'm going to browse through them when I get time (apt-get source ghc). On Tue, 15 Jan 2013, Neil Davies wrote: Hi - would another RPi (or even 2 from tomorrow another one arriving) help? I can make them accessible (i.e. in our DMZ) - Neil On 15 Jan 2013, at 16:36, rocon...@theorem.ca wrote: On Mon, 14 Jan 2013, Thijs Alkemade wrote: Op 14 jan. 2013, om 17:30 heeft rocon...@theorem.ca het volgende geschreven: On Thu, 10 Jan 2013, Karel Gardas wrote: Hmm, are you using Raspbian? I.e. hard-float abi caught my eye in case of ARMv6/ARM11 chip here... I'm afraid LLVM is not well guided in your case so could you be so kind and test if adding -optlc=-mattr=+vfp2 helps? You need to add it to your build.mk probably and you will need to rebuild everything again... No change with SRC_HC_OPTS = -H64m -Rghc-timing -optc-mfloat-abi=hard -optc-march=armv6 -optc-mfpu=vfp -optlc=-mattr=+vfp2 GhcStage1HcOpts = -O -fllvm GhcStage2HcOpts = -O0 -fllvm GhcLibHcOpts = -O -fllvm I still get the error: ===--- building final phase make -r --no-print-directory -f ghc.mk phase=final all LD libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o /usr/bin/ld: error: libraries/ghc-prim/dist-install/build/cbits/debug.o uses VFP register arguments, libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o does not /usr/bin/ld: failed to merge target specific data of file libraries/ghc-prim/dist-install/build/cbits/debug.o I don't really understand what is going on here. The file libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o doesn't even exist, so when I manually run /usr/bin/ld I get: $ /usr/bin/ld libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o /usr/bin/ld: cannot find libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o: No such file or directory What is make really doing here? My research suggests that this error is a symptom of trying to link something without the hard-float ABI together with something with a soft-float ABI. But I don't know where libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o is coming from. libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o is the output ld was asked to generate. Apparently, some of the input .o files didn't use VFP register arguments, so ld concluded that the output should also not use VFP register arguments. But then ld encountered a .o file that did use VFP register arguments, and threw an error (something in cbits, so probably built with different CFLAGS). From your flags I'd say you miss -optlc-float-abi=hard. I had it in GhcLibHcOpts, but I'm not sure that is the correct way to ensure it is passed to everything exactly once. Okay, I tried: SRC_HC_OPTS = -H64m -Rghc-timing -optc-mfloat-abi=hard -optc-march=armv6 -optc-mfpu=vfp -optlc=-mattr=+vfp2 GhcStage1HcOpts = -O -fllvm GhcStage2HcOpts = -O0 -fllvm GhcLibHcOpts = -O -fllvm -optlc-float-abi=hard and I got the same error at a different build step. I'm not sure if it is earlier or later. It seems still not everything is using the hard-float ABI. ===--- building final phase make -r --no-print-directory -f ghc.mk phase=final all HC [stage 1] utils/hsc2hs/dist-install/build/tmp/hsc2hs /usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses VFP register arguments, utils/hsc2hs/dist-install/build/Main.o does not /usr/bin/ld: failed to merge target specific data of file utils/hsc2hs/dist-install/build/Main.o /usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses VFP register arguments, utils/hsc2hs/dist-install/build/HSCParser.o does not /usr/bin/ld: failed to merge target specific data of file utils/hsc2hs/dist-install/build/HSCParser.o /usr/bin/ld: error: utils/hsc2hs/dist-install/build/tmp/hsc2hs uses VFP register arguments,
Re: Error building ghc on raspberry pi.
On Wed, 16 Jan 2013, Karel Gardas wrote: Guys, I've installed raspbian into ubuntu chroot on my panda. Now to simulate what GHC detects on your hardware, could you be so kind and send me output of: uname -m armv6l uname -r 3.6.11+ uname -s Linux uname -v #346 PREEMPT Fri Dec 28 00:50:33 GMT 2012 this looks like a needed info for config.guess to detect machine hardware well. Also if you send me output of: sh config.guess armv6l-unknown-linux-gnueabihf it would be great. Everything of course run on your rpi board! Thanks, Karel -- Russell O'Connor http://r6.ca/ ``All talk about `theft,''' the general counsel of the American Graphophone Company wrote, ``is the merest claptrap, for there exists no property in ideas musical, literary or artistic, except as defined by statute.'' ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Error building ghc on raspberry pi.
Good! So the patch I already provided is working fine at least w.r.t. change in configure. I've tested it here on my raspbian chroot on pandaboard where I've hacked config.guess to print exactly what you get on real rpi. Now, I'm curious if the hack in DriverPipeline.hs helps too. Were you able to merge the patch into your GHC? And rebuild? What was the result? Thanks, Karel On 01/16/13 08:02 PM, rocon...@theorem.ca wrote: On Wed, 16 Jan 2013, Karel Gardas wrote: Guys, I've installed raspbian into ubuntu chroot on my panda. Now to simulate what GHC detects on your hardware, could you be so kind and send me output of: uname -m armv6l uname -r 3.6.11+ uname -s Linux uname -v #346 PREEMPT Fri Dec 28 00:50:33 GMT 2012 this looks like a needed info for config.guess to detect machine hardware well. Also if you send me output of: sh config.guess armv6l-unknown-linux-gnueabihf it would be great. Everything of course run on your rpi board! Thanks, Karel ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Error building ghc on raspberry pi.
On Wed, 16 Jan 2013, Karel Gardas wrote: Good! So the patch I already provided is working fine at least w.r.t. change in configure. I've tested it here on my raspbian chroot on pandaboard where I've hacked config.guess to print exactly what you get on real rpi. Now, I'm curious if the hack in DriverPipeline.hs helps too. Were you able to merge the patch into your GHC? And rebuild? What was the result? I'm still trying to figure out the correct usage of -optlc-float-abi=hard in mk/build.mk. I've ben getting a lot of errors about two occurances of the float-abi=hard flag. Thanks, Karel On 01/16/13 08:02 PM, rocon...@theorem.ca wrote: On Wed, 16 Jan 2013, Karel Gardas wrote: Guys, I've installed raspbian into ubuntu chroot on my panda. Now to simulate what GHC detects on your hardware, could you be so kind and send me output of: uname -m armv6l uname -r 3.6.11+ uname -s Linux uname -v #346 PREEMPT Fri Dec 28 00:50:33 GMT 2012 this looks like a needed info for config.guess to detect machine hardware well. Also if you send me output of: sh config.guess armv6l-unknown-linux-gnueabihf it would be great. Everything of course run on your rpi board! Thanks, Karel -- Russell O'Connor http://r6.ca/ ``All talk about `theft,''' the general counsel of the American Graphophone Company wrote, ``is the merest claptrap, for there exists no property in ideas musical, literary or artistic, except as defined by statute.'' ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: What is the scheduler type of GHC?
Excerpts from Magicloud Magiclouds's message of Wed Jan 16 00:32:00 -0800 2013: Hi, Just read a post about schedulers in erlang and go lang, which informed me that erlang is preemptive and go lang is cooperative. So which is used by GHC? From ghc wiki about rts, if the question is only within haskell threads, it seems like cooperative. Additionally, the current scheduler is round-robin with some heuristics for when threads get to cut the line, so we do not have priorities for threads. I'm currently working on a patch which allows for more flexible scheduling. Edward ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Error building ghc on raspberry pi.
On 01/16/13 08:12 PM, rocon...@theorem.ca wrote: On Wed, 16 Jan 2013, Karel Gardas wrote: Good! So the patch I already provided is working fine at least w.r.t. change in configure. I've tested it here on my raspbian chroot on pandaboard where I've hacked config.guess to print exactly what you get on real rpi. Now, I'm curious if the hack in DriverPipeline.hs helps too. Were you able to merge the patch into your GHC? And rebuild? What was the result? I'm still trying to figure out the correct usage of -optlc-float-abi=hard in mk/build.mk. I've ben getting a lot of errors about two occurances of the float-abi=hard flag. You should not IMHO. My patch should solve all your issues. :-) The only issue you may get is that your distro ghc will compile for soft-float ABI and your compiled GHC will compile to hard-float and object files will get mixed somewhere. But I trust your distro ghc builders that this is not the case so both GHCs should compile using hard-float. So issue solved, at least should be. Now I'm just waiting if you verify this or not so I'm either able to submit the patch for inclusion or hack it more... Karel ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Irritating compilation error on Windows32.
Hi all. I wrote the following test program: bar x = x * x on a Win32 (SP3) machine using the Haskell Platform and GHC-7.6.1 (standalone) and I have noticed the same frustrating errors. Any suggestions would be most appreciated. Thanks, ~Caitlin C:\ghci GHCi, version 7.4.2: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude Prelude :l bar [1 of 1] Compiling Main ( bar.hs, interpreted ) *** Exception: CreateDirectory .: permission denied (Access is denied.) :l bar.hs [1 of 1] Compiling Main ( bar.hs, interpreted ) *** Exception: CreateDirectory .: permission denied (Access is denied.) :l C:\\bar.hs [1 of 1] Compiling Main ( C:\bar.hs, interpreted ) *** Exception: CreateDirectory C:\\: permission denied (Access is denied.) ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
