October 2006 - Glasgow-haskell-users

Visual Haskell 2005?
by Michael Sparks 15 Oct '06

15 Oct '06

Are there any plans to make a version of Visual Haskell that works with Visual Studio 2005?

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ghc-6.6 candidate Win32 installer
by Sigbjorn Finne 14 Oct '06

14 Oct '06

Hi, for Win32 users wanting the latest GHC goodness, a candidate 6.6 installer is now available, http://haskell.org/ghc/dist/6.6/ghc-6-6.msi If anyone's willing to download it and kick the tires a bit, that'd be great. If nothing too egregious shows up, I'm planning to publish sometime tomorrow. thx --sigbjorn

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making docs for ghc6.6
by Michael Shulman 14 Oct '06

14 Oct '06

When I do `make html' in ghc6.6, haddock complains about an unrecognized option `source-modules'. It appears this option was added in the most recent haddock 0.8; perhaps ghc6.6 should check the version of haddock installed? I went ahead and installed haddock 0.8, and now the documentation gets made, but `make install-docs' only installs the library documentation, not the users guide. Am I doing something wrong? Mike

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ghc-6.6 under solaris
by Christian Maeder 13 Oct '06

13 Oct '06

I've created ghc-6.6 under solaris. This did only work with SplitObj=No in mk/build.mk. (There was an early split error, that I could reproduce.) When trying out this compiler, I got the following error (that I only post for the record): Cheers Christian [410 of 642] Compiling Proofs.HideTheoremShift ( Proofs/HideTheoremShift.hs, Proofs/HideTheoremShift.o ) ghc-6.6: panic! (the 'impossible' happened) (GHC version 6.6 for sparc-sun-solaris2): lookupDeprec main:GUI.ConsoleUtils.listBox{v r36Wf} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug gmake: *** [hets] Error 1

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searching docs in 6.6
by Serge D. Mechveliani 12 Oct '06

12 Oct '06

Please, who knows how to find (install) docs in ghc-6.6 ? I install ghc-6.6 from source to ~/ghc/6.6/ghc-6.6/inst by ./configure --prefix=/home/mechvel/ghc/6.6/inst make make install The installed system seems to work. Then, I apply the WWW brouser to see the documentation. It shows at ~/ghc/6.6/ghc-6.6/docs/ the files index.html, users_guide/ and such, but I cannot see the docs further because of that " ~/ghc/6.6/ghc-6.6/docs/users_guide/index.html cannot be found ". How to install it, please? Thank you in advance for help, ----------------- Serge Mechveliani mechvel(a)botik.ru

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Problem with ghc-6.5.20061008 on Mac OS X Intel
by Deborah Goldsmith 12 Oct '06

12 Oct '06

Hi, I was able to build this release using the 20060915 Intel build that's available, on 10.4.8. ghci seems to work OK (except for Readline), but an attempt to compile gives: $ ghc example25.hs /usr/bin/ld: Undefined symbols: _mtlzm1zi0_ControlziMonadziState_evalStateT_closure _mtlzm1zi0_ControlziMonadziState_gets_closure _mtlzm1zi0_ControlziMonadziState_zdf1_closure _mtlzm1zi0_ControlziMonadziState_zdf7_closure _mtlzm1zi0_ControlziMonadziState_zdf9_closure _mtlzm1zi0_ControlziMonadziWriter_zdf5_closure _mtlzm1zi0_ControlziMonadziWriter_zdf7_closure collect2: ld returned 1 exit status This didn't happen before. Any ideas? Am I doing something wrong, or is there something wrong with the 20061008 snapshot? Thanks, Deborah

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Using GHC-as-a-library
by Martin Grabmueller 12 Oct '06

12 Oct '06

Hello all, I've been playing around with GHC-as-a-library a bit now, and using yesterday's snapshot of GHC (ghc-6.5.20061004, compiled from source), I ran into the following problem: When using the Haskell program at the end of this mail, it compiles fine (after exposing the ghc package with ghc-pkg), but when running it complains: Main: Can't find package.conf as /usr/local/ghc/lib/ghc-6.5.20061004/driver/package.conf.inplace So it seems to search for a package.conf file in the build tree instead of an installed one. Passing in the path to the build tree (commented out in the program) to GHC.newSession works. Has anyone else encountered this problem? There is probably only a small fix necessary, but I have not yet been able to figure it out by myself. Thanks, Martin module Main where import qualified GHC import DynFlags (defaultDynFlags) import Outputable (ppr, showSDoc, text, (<+>), ($$), empty) import BasicTypes import Data.List -- This should work, but compiler complains: -- Main: Can't find package.conf as -- /usr/local/ghc/lib/ghc-6.5.20061004/driver/package.conf.inplace my_ghc_root = "/usr/local/ghc/lib/ghc-6.5.20061004" -- This does work: --my_ghc_root = "/home/misc/src/ghc-6.5.20061004" main = GHC.defaultErrorHandler defaultDynFlags $ do let ghcMode = GHC.JustTypecheck -- Create GHC session, passing GHC installation directory session <- GHC.newSession ghcMode (Just my_ghc_root) dflags0 <- GHC.getSessionDynFlags session GHC.defaultCleanupHandler dflags0 $ do GHC.setSessionDynFlags session dflags0 putStrLn "New session defined" let testModule = (GHC.mkModuleName "Test") t <- GHC.guessTarget "Test.hs" Nothing GHC.setTargets session [t] ok <- GHC.load session GHC.LoadAllTargets if failed ok then putStrLn "Loading failed!" else putStrLn "Loading OK!" checked <- GHC.checkModule session testModule case checked of Nothing -> putStrLn "Couldn't check" Just (GHC.CheckedModule parsed renamed typechecked info) -> do putStrLn (showSDoc (ppr parsed)) putStrLn (showSDoc (ppr renamed)) putStrLn (showSDoc (ppr typechecked)) putStrLn (showSDoc (case info of Just cm | Just scope <- GHC.modInfoTopLevelScope cm -> let (local,global) = partition ((== testModule) . GHC.moduleName . GHC.nameModule) scope in (text "global names: " <+> ppr global) $$ (text "local names: " <+> ppr local) _ -> empty))

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docs "not found" on GHC page
by Serge D. Mechveliani 12 Oct '06

12 Oct '06

I go by brouser to www.haskell.org/ghc, click at `Documentation', at `HTML.tar.gz' on The User's Guide ... Download: | HTML.tar.gz | PDF | A4 Postscript (gzipped) | And it responds The requested URL /ghc/docs/latest/users_guide.html.tar.gz was not found on this server. Is this a bug on the GHC page? ----------------- Serge Mechveliani mechvel(a)botik.ru

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RE: [Haskell-cafe] GHC Core still supported?
by Simon Peyton-Jones 11 Oct '06

11 Oct '06

Jim, and others (I'm ccing GHC users) External Core is a feature of GHC that is lonely and unloved. External Core longs to have someone to look after it, tell it that it is a Truly Useful Feature, and keep it working. Seriously, External Core has a strong tendency to bit-rot because (so far as I can tell) few people seem to use it, and hence it can lag behind changes in the rest of the compiler. Yes, in principle we at GHC HQ should push the entire compiler along in sync, but there are just too few hours in the day. Another contributory factor is that some of the things you might use External Core for can now be done by using the GHC API. So the true answer to your title line "Is External Core still supported?" is "there is no reason it can't be, but in fact at the moment it probably doesn't work right". I think this is a pity because External Core is a pretty good way for people interested in analyses and back ends to use GHC as a front end that translates all of Haskell into a small intermediate language. But all is not lost. External Core is a good example of a feature that doesn't require deep knowledge of GHC's internals to understand and maintain, so it's perfect for someone else to undertake. Is anyone (or a group of people) interested? We'd give plenty of support to such an effort. Meanwhile, if you want to use External Core, but can't because it doesn't work properly for you, don't be afraid to yell. (E.g. File a Trac bug report.) I don't want to promise an immediate fix, but the more people that use it the keener we are to get it done. thanks Simon | -----Original Message----- | From: haskell-cafe-bounces(a)haskell.org [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Jim | Apple | Sent: 11 October 2006 02:35 | To: haskell-cafe(a)haskell.org | Subject: [Haskell-cafe] GHC Core still supported? | | In http://www.haskell.org/ghc/dist/current/docs/users_guide/ext-core.html | , I see two notes that I can't verify: | | 1. I don't see any CORE pragma on | http://www.haskell.org/ghc/dist/current/docs/users_guide/pragmas.html | | 2. Using GHC 6.5.20060920, I compile | | module Core where | data Foo = Bar | | with -fext-core to get | | %module main:Core | %data main:Core.Foo = | {Bar}; | | I then compile the resulting hcr file with no flags to get | | <no location info>: | 1: Parse error | : | %data main:Core.Foo = | {Bar}; | | Jim | _______________________________________________ | Haskell-Cafe mailing list | Haskell-Cafe(a)haskell.org | http://www.haskell.org/mailman/listinfo/haskell-cafe

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UTF-8 decoding error
by Christian Maeder 10 Oct '06

10 Oct '06

How can I convince ghc version 6.5.20060919 to accept latin1 characters in literals? I wish to keep source files (containing umlauts in strings) that can be compiled by either ghc-6.4.2 and ghc-6.6. Christian

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