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Make shared library - questions
by Sergiy Nazarenko 26 Aug '11

26 Aug '11

Hi ! I'm trying to compile shared library. This library will use as part of plugin for some program. If I compile library with option -dynamic my library has links for HS libraries like libHSbase-4.2.0.2-ghc6.12.3.so and so on. But program has crashed constantly. Is it possible to make shared library without -dynamic flag? I want to try to make library without dependencies. According to http://www.well-typed.com/blog/30 theoretically I can do this but I found this impossible - http://hackage.haskell.org/trac/ghc/ticket/3704 My options to compile: ghc -O2 --make -no-hs-main -dynamic -shared -fPIC -optl '-shared' -optc '-DMODULE=MyLib' -o MyLib.so MyLib.hs module_init.c -optl-Wl -lHSrts-ghc6.12.3 If I try compile without -dynamic I get error: /usr/bin/ld: /usr/local/lib/ghc-6.12.3/base-4.2.0.2/libHSbase-4.2.0.2.a(Conc__270.o): relocation R_X86_64_32 against `base_GHCziConc_ensureIOManagerIsRunning1_closure' can not be used when making a shared object; recompile with -fPIC /usr/local/lib/ghc-6.12.3/base-4.2.0.2/libHSbase-4.2.0.2.a: could not read symbols: Bad value collect2: ld returned 1 exit status My system is: Cenos 5.6 ghc6.12.3 gcc-4.2.1 Cheers, Sergiy

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a minor bug (memory leak) in ListLike package
by bob zhang 26 Aug '11

26 Aug '11

Hi, John, there is a space leak problem in ListLike typeclass, in the method genericLength calclen !accum cl = calclen accum cl = --- thank you for your nice library btw, is there any way to derive ListLike interface automatically? for such type : newtype List a = List {[a]} Best,bob

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hoogle data no connection to host http://code.galois.com/darcs/haskell-platform ...
by informationen 26 Aug '11

26 Aug '11

Hi, i installed Hoogle succesfullly with cabal install hoogle then i try to run hoogle data but the connection to http://code.galois.com/darcs/haskell-platform/haskell-platform.cabal times out. How can i download the data needed for the hoogle command line tool? Greetings Chris

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ANN: shelltestrunner 1.1
by Simon Michael 26 Aug '11

26 Aug '11

I'm pleased to announce shelltestrunner 1.1. shelltestrunner tests command-line programs or arbitrary shell commands. It reads simple declarative tests specifying a command, some input, and the expected output, error output and exit status. Tests can be run selectively, in parallel, with a timeout, in color, and/or with differences highlighted. Projects using it include hledger, yesod, and berp. shelltestrunner is free software released under GPLv3+. New in 1.1: * bump process dependency to allow building with GHC 7.2.1 * new `-a/--all` flag shows all failure output without truncating Home page: http://joyful.com/shelltestrunner Install: $ cabal install shelltestrunner

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ping haskell.org timeout
by Greg Fitzgerald 26 Aug '11

26 Aug '11

"cabal update" hangs. "ping haskell.org" times out. But haskell.org and hackage webpages are loading just fine. What's going on? Thanks, Greg

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Cabal-1.10.1.0 and bytestring-0.9.2.0 hackage problem.
by Bertram Felgenhauer 25 Aug '11

25 Aug '11

Dear list, Cabal-1.10.1.0 contains a bug that causes it to fail to parse the test-suite target of bytestring-0.9.2.0. Since cabal-install parses all package descriptions to before resolving dependencies, users with that version of Cabal are stuck. Now it seems somebody realised this problem and removed bytestring-0.9.2.0 from hackage. However, 1. http://hackage.haskell.org/package/bytestring is now broken. 2. The downloadeble package index (00-index.tar) still contains the bytestring-0.9.2.0 cabal file, so the problem persists. As a workaround, one can remove the cabal file from the downloaded index manually, tar -f ~/.cabal/packages/hackage.haskell.org/00-index.tar --delete bytestring/0.9.2.0 (or rebuild Cabal / cabal-install starting with 'cabal unpack Cabal; cabal unpack cabal-install') But it really needs to be fixed on the hackage server. Best regards, Bertram

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do-re-mi
by Albert Y. C. Lai 25 Aug '11

25 Aug '11

do, a block, a monad block rec, a knot tied in the block mu, a name that calls itself (mu is pronounced as me in modern Greek) forM_, a long long list to run SO, a state aborting threads (SO is stack overflow) la, a state to follow SO T's, tranformers of monads that will bring us back to do

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Haddock chokes on function arguments
by Arnaud Bailly 25 Aug '11

25 Aug '11

Hello, while trying to generate Haddock documentation (Haddock version 2.9.2, (c) Simon Marlow 2006), it chokes on the following fragment -- |Apply a given function over all elements of a list and select one of the -- results. selector :: (Arbitrary b) => [a] -> -- ^ Elements to select from (a -> b) -> -- ^ Constructor to apply to selected element Gen b selector list ctor = oneof (map (return . ctor) list) with the following error message: ' parse error on input `-- ^ Elements to select from I am puzzled as this is exactly how arguments are supposed to be documented, according to http://www.haskell.org/haddock/doc/html/ch03s02.html#id565220 Any clues ? Arnaud

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PhD/PostDoc opening in programming techniques and technologies
by Ralf Laemmel 25 Aug '11

25 Aug '11

PhD/PostDoc opening in programming techniques and technologies in the Software Languages Team [1] in Koblenz. Applicants can safely assume that functional programming plays a huge role in this. The application deadline is 31 Aug. A German description of formalities is available [2]. One essential component of the position is research, teaching as well as development efforts on 101companies [3]. Regards, Ralf [4] [1] http://softlang.wikidot.com/ [2] http://softlang.uni-koblenz.de/docs/Ausschreibungstext_WiMi_HPII-Laemmel.pdf [3] http://101companies.org/ [4] http://softlang.wikidot.com/rlaemmel:home

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ANNOUNCE: HakkuTaikai: Haskell Hackathon in Tokyo, 25th September 2011
by Liyang HU 25 Aug '11

25 Aug '11

You may have heard the rumours, and I can confirm that it's true: HakkuTaikai is happening! After spending a long week at ICFP 2011 talking about Haskell, why not relax by actually hacking some Haskell? Full details on the wiki page: http://www.haskell.org/haskellwiki/HakkuTaikai When: Sunday, 25th September 2011 Where: Room 1208 of the NII building; the same location as ICFP. Registration is free! See the wiki page above for details. Feel free to email or IRC or twit me with any questions. Many thanks to http://www.nii.ac.jp/ for hosting the event! Cheers, /Liyang

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