- iPhone - Haskell.org

New wiki sections on Xcode integration and troubleshooting
by Luke Iannini 18 Dec '12

18 Dec '12

Hi all! I just added a couple sections to the ghc-ios wiki: https://github.com/ghc-ios/ghc/wiki See "Integrating with Xcode" and "Troubleshooting". Please let me know if you have any ideas for additions or improvements. Cheers Luke

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FFI for living in C
by Casey Basichis 03 Dec '12

03 Dec '12

Hi, I've been reading about the FFI for getting Haskell to communicate with C code (C++ really). My intention is to handle most of the app - the GUI events in C++ and sending all of the processing logic in Haskell - including a database etc. Is the FFI the right tool for a situation where, while used extensively, Haskell is more or less there to take in data, like lists and spit out data like vectors etc back to C. I am looking to get a few test running where I can pass data in an out of Haskell like vectors of floats. Also, I noticed on the wiki example: Haskell start c_main I was a little confused by this. Does Haskell load up first because its a library? I couldn't figure out where it was being called in the C code or why Haskell loads first. Not a biggie just a bit of an impediment in understanding how it all works. Thanks, Casey -- Casey James Basichis Composer - Cartoon Network http://www.caseyjamesbasichis.com caseybasichis(a)gmail.com 310.387.7540

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new user
by joe stinton 01 Dec '12

01 Dec '12

hi all I am a new user of the I phone 5 I did use the I phone 3gs but well never really got on all that well with it but well I do love the I phone 5, well that's enoth of that time for my first of many many questions!! I have been trying to get a new ring tone as I want something funny but I am getting no wear I tried to down load a few from I tunes they are on my phone if you go in to ring tones and then to store but I cant work out what to do from there. oh and I down loaded them from the pc I tunes and not the phone not sure if that makes any difference. well thanks for any help and I will try to keep my questions down as low as I can !! Joe

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ghc-ios build issue pt.2
by Casey Basichis 30 Nov '12

30 Nov '12

Hi, I'm unable to get past the make install stage of building ghc-ios. I installed llvm3.0, set it as the default compiler and and followed the instructions on the wiki several times, deleting the folder and starting from scratch each time. Here is what I get for make install. I have the full terminal session log for the wiki install procedure if that I can send as well (I think it may be to large to post to the mailing list) ===--- building phase 0 make -r --no-print-directory -f ghc.mk phase=0 phase_0_builds includes/ghc.mk:156: warning: overriding commands for target `inplace/bin/mkDerivedConstants' includes/ghc.mk:146: warning: ignoring old commands for target `inplace/bin/mkDerivedConstants' includes/ghc.mk:200: warning: overriding commands for target `inplace/bin/mkGHCConstants' includes/ghc.mk:188: warning: ignoring old commands for target `inplace/bin/mkGHCConstants' make[1]: Nothing to be done for `phase_0_builds'. ===--- building phase 1 make -r --no-print-directory -f ghc.mk phase=1 phase_1_builds includes/ghc.mk:156: warning: overriding commands for target `inplace/bin/mkDerivedConstants' includes/ghc.mk:146: warning: ignoring old commands for target `inplace/bin/mkDerivedConstants' includes/ghc.mk:200: warning: overriding commands for target `inplace/bin/mkGHCConstants' includes/ghc.mk:188: warning: ignoring old commands for target `inplace/bin/mkGHCConstants' make[1]: Nothing to be done for `phase_1_builds'. ===--- building final phase make -r --no-print-directory -f ghc.mk phase=final install includes/ghc.mk:156: warning: overriding commands for target `inplace/bin/mkDerivedConstants' includes/ghc.mk:146: warning: ignoring old commands for target `inplace/bin/mkDerivedConstants' includes/ghc.mk:200: warning: overriding commands for target `inplace/bin/mkGHCConstants' includes/ghc.mk:188: warning: ignoring old commands for target `inplace/bin/mkGHCConstants' /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/share/man" /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/share/man/man1" /usr/bin/install -c -m 644 docs/man/ghc.1 "/usr/local/ghc-iphone/share/man/man1" /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127" /usr/bin/install -c -m 755 driver/split/dist/ghc-split "/usr/local/ghc-iphone/lib/ghc-7.5.20121127" /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include" /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/." && /usr/bin/install -c -m 644 includes/./*.h "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/./" && /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/rts" && /usr/bin/install -c -m 644 includes/rts/*.h "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/rts/" && /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/rts/prof" && /usr/bin/install -c -m 644 includes/rts/prof/*.h "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/rts/prof/" && /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/rts/storage" && /usr/bin/install -c -m 644 includes/rts/storage/*.h "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/rts/storage/" && /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/stg" && /usr/bin/install -c -m 644 includes/stg/*.h "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/stg/" && true /usr/bin/install -c -m 644 includes/ghcautoconf.h includes/ghcplatform.h includes/dist-ghcconstants/header/GHCConstants.h includes/dist-derivedconstants/header/DerivedConstants.h "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/" /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include" /usr/bin/install -c -m 644 rts/dist/build/ffi.h rts/dist/build/ffitarget.h "/usr/local/ghc-iphone/lib/ghc-7.5.20121127/include/" /usr/bin/install -c -m 755 -d "/usr/local/ghc-iphone/bin" install: chmod 755 /usr/local/ghc-iphone/bin: Operation not permitted "rm" -f "/usr/local/ghc-iphone/bin/arm-apple-darwin10-hsc2hs" create () { touch "$1" && chmod 755 "$1" ; } && create "/usr/local/ghc-iphone/bin/arm-apple-darwin10-hsc2hs" touch: /usr/local/ghc-iphone/bin/arm-apple-darwin10-hsc2hs: Permission denied make[1]: *** [install_utils/hsc2hs_dist_wrapper] Error 1 make: *** [install] Error 2 CASEYs-MacBook-Pro:ghc caseybasichis$

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ghc-ios build issue
by Robert Lorentz 27 Nov '12

27 Nov '12

Hi everyone, Last night I spoke to two very helpful folks (Stephen and Luke) on the matter of ghc-ios not building for me. I haven't reached a solution yet and thought I would post my issue. Stephen thought maybe there was a version mismatch with Cabal, but Luke didn't seem to have any problems building.. Any thoughts on what is going wrong here? I'm following the directions EXPLICITLY from: https://github.com/ghc-ios/ghc/wiki I seem to have done the git branch selection properly: macbook-air:ghc rcl$ cd libraries/Cabal/Cabal/ macbook-air:Cabal rcl$ git branch * ios I'm using: macbook-air:ghc rcl$ ghc --version The Glorious Glasgow Haskell Compilation System, version 7.4.1 macbook-air:ghc rcl$ llc --version Low Level Virtual Machine (http://llvm.org/) llvm version 3.0 Optimized build. Built Nov 25 2012 (23:35:46). Host: x86_64-apple-darwin12.2.0 Host CPU: i686 Registered Targets: alpha - Alpha [experimental] arm - ARM … MacBook-Air:~ rcl$ uname -a Darwin MacBook-Air.local 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64 Mac OS X 10.8.2 Things I've tried since starting: At first, I had LLVM 3.1 so I switched. Then I had the latest GHC 'Haskell Package' which was 7.4.2, the wiki recommends 7.4.2 so I installed this older version from Haskell Package 2012.2.0.0 64bit. Then I thought perhaps I need to install 32 bit Haskell Package; I did this (7.4.1) and it also fails. When compiling ghc, Cabal fails: [68 of 68] Compiling Main ( utils/ghc-cabal/Main.hs, bootstrapping/Main.o ) utils/ghc-cabal/Main.hs:287:67: Couldn't match expected type `Data.ByteString.Lazy.Internal.ByteString' with actual type `String' In the return type of a call of `toUTF8' In the second argument of `writeFileAtomic', namely `(toUTF8 content)' In a stmt of a 'do' block: writeFileAtomic (distdir </> "inplace-pkg-config") (toUTF8 content) make[1]: *** [utils/ghc-cabal/dist/build/tmp/ghc-cabal] Error 1 The build starts off like this: "/usr/bin/ghc" -H64m -O2 --make utils/ghc-cabal/Main.hs -o utils/ghc-cabal/dist/build/tmp/ghc-cabal \ -no-user-package-conf \ -Wall \ -DCABAL_VERSION=1,17,0 \ -odir bootstrapping \ -hidir bootstrapping \ -ilibraries/Cabal/Cabal \ -ilibraries/filepath \ -ilibraries/hpc \

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Re: [Haskell-iPhone] Hey Stephen - more on cross compiling
by Stephen Paul Weber 23 Nov '12

23 Nov '12

Somebody claiming to be Gabor Greif wrote: >https://github.com/ggreif/ghc/blob/master/rules/build-package-data.mk#L67 >(this can be written simpler) I will try this on my next attempt. >Congrats to your stage1 GHC! I suspect some time will pass till all >nits are picked, but I am seeing very good progress here :-) Another question: when I try to compile things with `-threaded`, GHC seems to add `-lpthreads`. QNX supports pthreads, but right in libc. Where should I be looking to patch that? Thanks for all your help :) -- Stephen Paul Weber, @singpolyma See <http://singpolyma.net> for how I prefer to be contacted edition right joseph

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Re: [Haskell-iPhone] Hey Stephen - more on cross compiling
by Stephen Paul Weber 23 Nov '12

23 Nov '12

Somebody claiming to be Gabor Greif wrote: >Congrats to your stage1 GHC! I suspect some time will pass till all >nits are picked, but I am seeing very good progress here :-) So, I've run into an interesting problem. When I telnet in to my simulator and run something produced by my GHC, it works fine (well, it doesn't get access to the GUI display, but console output is fine). When I run it from the simulator GUI, it consumes more and more RAM until the OS denies it and it crashes. This massive RAM consumption happens *before* the first line of my `main` executes. I'm trying to find ways to determine what the differences in environment are, but in the meantime: what's the best way to debug this from the GHC side? I guess it'll be somewhere in the RTS boot up, are there debug statements in there I can turn on, or should I start inserting stuff? Which files are the right files to look in for this phase? Thanks, -- Stephen Paul Weber, @singpolyma See <http://singpolyma.net> for how I prefer to be contacted edition right joseph

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GHC as a cross-compiler
by Stephen Paul Weber 19 Nov '12

19 Nov '12

Hello all, I'm interested in getting a GHC cross-compiler going for the new QNX-based BlackBerry 10 OS launching in the new year, but the documentation on GHC as cross-compiler <http://hackage.haskell.org/trac/ghc/wiki/CrossCompilation> is pretty sparse and contradictory. You guys seem to be doing it. How complex is it? Where should I start looking for information about the configuration I'll need in the build system, etc? Do I need to know a lot about autotools hacking to get anywhere? Thanks, -- Stephen Paul Weber, @singpolyma See <http://singpolyma.net> for how I prefer to be contacted edition right joseph

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New iPhone user
by Catherine McAteer 22 Oct '12

22 Oct '12

Hello, Sorry for sending my last e-mail using the wrong e-mail address. I'm about to get my first iPhone and would like to know where I can find accessible information on how to use the iPhone 5 as a blind person. Many thanks, Catherine r

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Pointers coming back into haskell from FFI on iPhone getting destroyed
by Mike Rotondo 11 Sep '12

11 Sep '12

Hi there fellow adventurers, I'm currently working on getting distributed-process<http://hackage.haskell.org/package/distributed-process> working on iOS, and I'm running into some issues that I think are rooted in the ghc-ios fork, rather than in the networking code that I've been puzzling through. I'm making a call to Network.Socket.getAddrInfo, which does an FFI call to getaddrinfo, the POSIX function. This function takes a double pointer to a struct that it fills in with information about a network address, and this struct contains a pointer to another struct. Here's where things go awry: This nested pointer is intact and valid when the c function (getaddrinfo) returns (I'm calling it from a wrapper function so I can inspect the contents before we return to Haskell), but once Haskell gets control-flow back, the nested pointer has been over-written, either with NULL (usually) or a pointer to some faraway & invalid memory, either of which cause EXC_BAD_ACCESS when haskell tries to #peek values out of the nested struct. Because I can see that the C function is completing successfully, and that its pointers and contents are all valid before Haskell gets them, I suspect that there is some underlying issue with the way iOS/ARM is handling the pointers when they are returned to Haskell. I'm going to try to set up a minimal repro tomorrow so I can investigate further, but in the meantime, does anyone who has worked on implementing this ghc fork have a clue what might be going wrong? Thanks much, Mike R

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