- Glasgow-haskell-users

Re: [Haskell-cafe] Ghci dynamic linking (Was: C++ libraries and GHCI)
by Max Bolingbroke 02 Oct '09

02 Oct '09

(Moving to ghc-users) I'd never seen V in nm output before: """ The symbol is a weak object. When a weak defined symbol is linked with a normal defined symbol, the normal defined symbol is used with no error. When a weak undefined symbol is linked and the symbol is not defined, the value of the weak symbol becomes zero with no error. On some systems, uppercase indicates that a default value has been specified. """" Perhaps support needs to be added for this symbol type to the GHCi dynamic linker? (It would work in compiled programs b/c we call down to the system static linker in that case). Cheers, Max 2009/9/29 Paolo Losi <paolo.losi(a)gmail.com>: > Hi all, > > I would really appreciate if anyone could > give a look to the following problem. > > Thanks in advance!!! > Paolo > > > ---------- Forwarded message ---------- > From: Paolo Losi <paolo.losi(a)gmail.com> > Date: Mon, Sep 14, 2009 at 10:33 AM > Subject: C++ libraries and GHCI > To: glasgow-haskell-users(a)haskell.org > > > Hi all, > > I'm working on a tentative implementation of haskell binding to libsvm [1]: > > http://hackage.haskell.org/package/HSvm > > The package includes libsvm C++ sources. > While it works perfectly with ghc --make (try to install the package and > compile http://bitbucket.org/pao/hsvm/raw/6cf7ca91f1e5/test/test.hs) > it fails with ghci: > > (hsvm)(env)paolo@moltrasio:~/trash$ ghci test.hs > GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help > Loading package ghc-prim ... linking ... done. > Loading package integer ... linking ... done. > Loading package base ... linking ... done. > Ok, modules loaded: Main. > Prelude Main> main > Loading package syb ... linking ... done. > Loading package array-0.2.0.0 ... linking ... done. > Loading package containers-0.2.0.1 ... linking ... done. > Loading package HSvm-0.1.0.2.89 ... linking ... <interactive>: > /home/paolo/trash/hsvm/lib/HSvm-0.1.0.2.89/ghc-6.10.4/HSHSvm-0.1.0.2.89.o: > unknown symbol `_ZTV6Kernel' > ghc: unable to load package `HSvm-0.1.0.2.89' > > Please note that the symbol is available in libHSHSvm-0.1.0.2.89.a > > $ nm HSHSvm-0.1.0.2.89.o |grep _ZTV6Kernel > 00000000 V _ZTV6Kernel > $ nm libHSHSvm-0.1.0.2.89.a |grep _ZTV6Kernel > 00000000 V _ZTV6Kernel > > Can anyone give a look to the problem? > > Thanks > Paolo > > [1] http://www.csie.ntu.edu.tw/~cjlin/libsvm/ > > > > -- > Paolo Losi > e-mail: paolo(a)enuan.com > mob: +39 348 7705261 > > ENUAN Srl > Via XX Settembre, 12 - 29100 Piacenza > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe(a)haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >

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which difference...
by Luca Ciciriello 30 Sep '09

30 Sep '09

Hi all. I've recently changed my home machine (MacOS X 10.5.8 intel) and I've installed the GHC 6.10.4 using the pakage: GHC-6.10.4-i386.pkg. All works fine and I can continue all my research projects on my new machine. Then I've noticed that exists another kind of installation using the package: haskell-platform-2009.2.0.2-i386.dmg. What diferences exists between these two pakages? Am I missing something using the first pakage instead using the dmg distribution? Thanks in advance for any answer. Luca. Upgrade to Internet Explorer 8 Optimised for MSN. Download Now _________________________________________________________________ With Windows Live, you can organise, edit, and share your photos. http://clk.atdmt.com/UKM/go/134665338/direct/01/

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Intel's Concurrent Collections for Haskell
by Don Stewart 29 Sep '09

29 Sep '09

http://softtalkblog.wordpress.com/2009/09/29/more-about-haskell-and-intel-c… Intel involved in work to port Concurrent Collections to Haskell. Might be interesting for benchmarks on 6.12 -- Don

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Re: [Haskell-cafe] Status of GHC as a Cross Compiler
by Donnie Jones 24 Sep '09

24 Sep '09

Hello John, glasgow-haskell-users is a more appropriate list... http://www.haskell.org/mailman/listinfo/glasgow-haskell-users I went ahead and cc'd your message to the list. Any replies please include John's email address as I don't think he is subscribed to the list. Hope that helps... -- Donnie Jones On Wed, Sep 23, 2009 at 1:50 PM, John Van Enk <vanenkj(a)gmail.com> wrote: > Hi, > > This may be more appropriate for a different list, but I'm having a hard > time figuring out whether or not we're getting a cross compiler in 6.12 or > not. Can some one point me to the correct place in Traq to find this > information? > > /jve > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe(a)haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >

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ANNOUNCE: GHC 6.8.3 Release Candidate
by Ian Lynagh 22 Sep '09

22 Sep '09

We are pleased to announce the Release Candidate phase for GHC 6.8.3. Snapshots beginning with 6.8.2.20080527 are release candidates for 6.8.3 You can download snapshots from here: http://www.haskell.org/ghc/dist/stable/dist/ Right now we have the source bundles: http://www.haskell.org/ghc/dist/stable/dist/ghc-6.8.2.20080527-src.tar.bz2 http://www.haskell.org/ghc/dist/stable/dist/ghc-6.8.2.20080527-src-extralib… Only the first of these is necessary. The "extralibs" package contains various extra packages that are often supplied with GHC - unpack the extralibs tarball on top of the source tree to add them, and they will be included in the build automatically. There is also currently an installer for i386/Windows and binary distributions for x86_64/Linux and i386/Linux. More may appear later. Please test as much as possible; bugs are much cheaper if we find them before the release! We expect to release in a few days, assuming no major issues are discovered. Thanks Ian, on behalf of the GHC team

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How to solve ghc-stage2: mkTextEncoding: invalid argument (Invalid argument) issue.
by Karel Gardas 21 Sep '09

21 Sep '09

Hello, recently I've found out that my solaris-based GHC buildbot is completely unusable since it always (when it get to, which means it does not fail with usual magic number mismatch: old/corrupt interface file?) fails with: "inplace/bin/ghc-stage2" -H32m -O -DNEW_GHC_LAYOUT -hide-all-packages -i -iutils/haddock/src -iutils/haddock/dist/build -iutils/haddock/dist/build/autogen -Iutils/haddock/dist/build -Iutils/haddock/dist/build/autogen -optP-DIN_GHC_TREE -optP-include -optPutils/haddock/dist/build/autogen/cabal_macros.h -package Cabal-1.7.4 -package array-0.2.0.1 -package base-4.2.0.0 -package containers-0.2.0.1 -package directory-1.0.0.2 -package filepath-1.1.0.1 -package ghc-6.11.20090915 -package pretty-1.0.1.0 -funbox-strict-fields -O2 -Wall -XForeignFunctionInterface -XCPP -XPatternGuards -XDeriveDataTypeable -XScopedTypeVariables -XMagicHash -odir utils/haddock/dist/build -hidir utils/haddock/dist/build -stubdir utils/haddock/dist/build -hisuf hi -osuf o -hcsuf hc -c utils/haddock/src/Haddock/GhcUtils.hs -o utils/haddock/dist/build/Haddock/GhcUtils.o ghc-stage2: mkTextEncoding: invalid argument (Invalid argument) make[1]: *** [utils/haddock/dist/build/Haddock/GhcUtils.o] Error 1 make: *** [all] Error 2 I've even tried to update my building GHC from 6.8.3 to 6.10.4, but it still does not help. Since I would really like to resurrect my GHC buildbot, do you have any idea how to fix this issue? Thanks, Karel PS: for reference, please have a look at http://darcs.haskell.org/buildbot/all/builders/kgardas%20head

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Re: runghc failing sometimes on Linux/ppc?
by Christopher Lewis 20 Sep '09

20 Sep '09

> On Sun, May 03, 2009 at 03:02:50PM +1000, Jens Petersen wrote: > > 2009/5/2 Jens Petersen <petersen at haskell.org>: > > > So I tried doing an unregisterised ppc build with: > > > > > > echo "GhcUnregisterised=YES" >> mk/build.mk > > > echo "GhcWithNativeCodeGen=NO" >> mk/build.mk > > > echo "SplitObjs=NO" >> mk/build.mk > > > > Are these the right build config settings? > > Yes. > > > > but this failed with: > > : > > > Linking dist-stage2/build/ghc/ghc ... > > : > > > (.text+0x20): relocation truncated to fit: R_PPC_REL24 against symbol > > > `__libc_start_main@@GLIBC_2.0' defined in .glink section in > > > /usr/lib/gcc/ppc64-redhat-linux/4.4.0/../../../../lib/crt1.o > > > /usr/lib/gcc/ppc64-redhat-linux/4.4.0/crtbegin.o:(.fini+0x0): > > > relocation truncated to fit: R_PPC_REL24 against `.text' > > Does using -mlongcall help? e.g.: > > SRC_CC_OPTS += -mlongcall > SRC_HC_OPTS += -optc-mlongcall > > (you can probably get away with something rather more specific, but > hopefully this will work). I haven't seen a message confirming if the suggested solution worked, but I am experiencing a similar problem---failure to link GHC due to relocation truncation errors---on a different environment (Ubuntu, PowerPC 32 bit). I have tried the above workaround, but it did not solve my problem. Furthermore, based on this (http://osdir.com/ml/bug-binutils-gnu/2009-08/msg00068.html) binutils thread (sorry, there is probably a better source to reference), it appears this problem was not fixed until very recently. Any additional information or suggested workarounds would be much appreciated. {c}

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Re: How to move code from GHC to libraries?
by Simon Marlow 17 Sep '09

17 Sep '09

On 17/09/2009 04:43, Norman Ramsey wrote: > > > While we're on this topic, I've had several requests to pull HOOPL > > > (the new dataflow optimization code) out as a library so that we can > > > make it into a Hackage package. I'd like to do this, but the > > > situation is complicated because HOOPL depends on UniqFM, which is > > > GHC-specific. I thought that there was a similar implementation out > > > in the wild (based on Okasaki-Gill rather than Adams), but I can't > > > find it on hackage. > > > > Isn't Data.IntMap ~= UniqFM? > > Yes, thanks --- I couldn't remember the module name, and search did > not help. > > > > Is there an established procedure for moving a part of GHC into a > > > library without breaking everybody's build? ... > > > > The architecture of our library setup is here: > > > > http://hackage.haskell.org/trac/ghc/wiki/Commentary/Libraries > > > You'd be adding a new zero-boot package... > > OK, I would like to propose that I put Data.IntMap into a new > zero-boot package, and that I replace the existing UniqFM with a > compatibility layer over Data.IntMap, with the eventual goal of > expunging UniqFM from the GHC sources. > > Any comments or objections? You can assume that the bootstrapping compiler already has Data.IntMap, no need to put it in a 0-boot package. So in principle using Data.IntMap is a good thing, I wholeheartedly support using the standard libraries instead of in-house duplicates where possible. The only potential problem is performance: we rely heavily on UniqFM in GHC, so we'd have to make sure that any replacement is at least as fast. The only time to measure it is when making the changeover, when you can measure the change in isolation. Cheers, Simon

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C++ libraries and GHCI
by Paolo Losi 14 Sep '09

14 Sep '09

Hi all, I'm working on a tentative implementation of haskell binding to libsvm [1]: http://hackage.haskell.org/package/HSvm The package includes libsvm C++ sources. While it works perfectly with ghc --make (try to install the package and compile http://bitbucket.org/pao/hsvm/raw/6cf7ca91f1e5/test/test.hs) it fails with ghci: (hsvm)(env)paolo@moltrasio:~/trash$ ghci test.hs GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. Ok, modules loaded: Main. Prelude Main> main Loading package syb ... linking ... done. Loading package array-0.2.0.0 ... linking ... done. Loading package containers-0.2.0.1 ... linking ... done. Loading package HSvm-0.1.0.2.89 ... linking ... <interactive>: /home/paolo/trash/hsvm/lib/HSvm-0.1.0.2.89/ghc-6.10.4/HSHSvm-0.1.0.2.89.o: unknown symbol `_ZTV6Kernel' ghc: unable to load package `HSvm-0.1.0.2.89' Please note that the symbol is available in libHSHSvm-0.1.0.2.89.a $ nm HSHSvm-0.1.0.2.89.o |grep _ZTV6Kernel 00000000 V _ZTV6Kernel $ nm libHSHSvm-0.1.0.2.89.a |grep _ZTV6Kernel 00000000 V _ZTV6Kernel Can anyone give a look to the problem? Thanks Paolo [1] http://www.csie.ntu.edu.tw/~cjlin/libsvm/

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Re: How to move code from GHC to libraries?
by Simon Marlow 14 Sep '09

14 Sep '09

On 12/09/2009 00:02, Norman Ramsey wrote: > > Incedentally, the reason I'd like us to make a decision on this now is > > because I'm about to add two new boot libraries... > > While we're on this topic, I've had several requests to pull HOOPL > (the new dataflow optimization code) out as a library so that we can > make it into a Hackage package. I'd like to do this, but the > situation is complicated because HOOPL depends on UniqFM, which is > GHC-specific. I thought that there was a similar implementation out > in the wild (based on Okasaki-Gill rather than Adams), but I can't > find it on hackage. Isn't Data.IntMap ~= UniqFM? > Is there an established procedure for moving a part of GHC into a > library without breaking everybody's build? If so, where will I find > it on the developers' wiki? If not, who can advise me so I can create > a page on the developers' wiki? :-) The architecture of our library setup is here: http://hackage.haskell.org/trac/ghc/wiki/Commentary/Libraries Basically you'd be adding a new zero-boot package (that terminology isn't used in the build system, where they're called "boot packages"). The best way to find out how to add another one is to grep for an existing zero-boot package (e.g. Cabal) in the top-level ghc.mk to see the various things you need to add. The new package would need to have a repository created on darcs.haskell.org, and you'd need to add it to $(TOP)/packages too. When the changes are pushed, everyone has to "./darcs-all get" to get the new repository. Cheers, Simon

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