April 2005 - Glasgow-haskell-users

RE: Cabal as shiped with ghc...
by Simon Marlow 22 Apr '05

22 Apr '05

On 22 April 2005 01:29, Benjamin Franksen wrote: > ...has package version 1.0, but the current darcs repo (and the home > page) says latest version is 0.6. May I assume that the 1.0 > versioning is accidental (i.e. wrong)? It's accidental, I think the darcs repo is going to sync up with the package version - Isaac? Cheers, Simon

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RE: building guide
by Simon Marlow 22 Apr '05

22 Apr '05

On 21 April 2005 21:02, Bulat Ziganshin wrote: > Hello GHC, > > where i can find building guide in the html/pdf/... any other form > readable by windows/IE? The Building Guide is available in online HTML, downloadable HTML, PDF and PS from the GHC documentation page: http://www.haskell.org/ghc/documentation.html Cheers, Simon

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RE: Edison Libraries in ghc 6.4
by Simon Marlow 22 Apr '05

22 Apr '05

On 20 April 2005 01:46, ajb(a)spamcop.net wrote: > Quoting Simon Marlow <simonmar(a)microsoft.com>: > >> Edison hasn't been converted to use hierarchical modules, and it >> doesn't have an active maintainer. > > Edison has an inactive maintainer, but the only reason he's inactive > is that apparently nobody wants Edison. :-) > > Would it help if I cabalised it? Sure! Cheers, Simon

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Cabal as shiped with ghc...
by Benjamin Franksen 21 Apr '05

21 Apr '05

...has package version 1.0, but the current darcs repo (and the home page) says latest version is 0.6. May I assume that the 1.0 versioning is accidental (i.e. wrong)? Ben

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big FFI bug in x86_64
by John Meacham 21 Apr '05

21 Apr '05

ghc 6.4 x86_64 appears to be interpreting foreign import "&foo" as importing the value of foo rather than the address of foo. I wrote a test case that demonstrates this problem here http://repetae.net/john/ghc-bug.tar.gz correct output: ;./foo () 0x080774f0 0x080774f4 0xdeadbeef incorrect output: ;./foo () 0x00000000deadbeef 0xffffffffdeadbeef zsh: segmentation fault (core dumped) ./foo This is a pretty major bug. I don't know how the libraries are even working. John -- John Meacham - ⑆repetae.net⑆john⑈

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building guide
by Bulat Ziganshin 21 Apr '05

21 Apr '05

Hello GHC, where i can find building guide in the html/pdf/... any other form readable by windows/IE? -- Best regards, Bulat mailto:bulatz@HotPOP.com

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limited-scope retry?
by Abraham Egnor 21 Apr '05

21 Apr '05

Suppose that a program using the Control.Concurrent.STM module had a producer/consumer setup - one thread writing to a channel, the other thread reading from the channel. It seems natural to want a function that the producer can call that will block until the consumer has finished consuming everything currently in the channel. The way I first tried implementing this was: -- types simplified for this example flush :: TChan () -> STM () flush chan = do e <- isEmptyTChan if not e then retry else return () Used in isolation, i.e. atomically $ writeTChan chan () atomically $ flush chan it works fine. However, when composed (atomically $ writeTChan chan () >> flush chan), it causes a race condition, usually resulting in deadlock, as the "retry" in flush replays the call to writeTChan as well. This situation begs for a way to limit the scope of "retry", in which case flush would be: flush chan = limitRetry $ do e <- isEmptyTChan if not e then retry else return () Abe

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RE: ghc for hp-ux 10.20 or 11
by Simon Marlow 21 Apr '05

21 Apr '05

On 21 April 2005 11:56, Benjamin Franksen wrote: > On Thursday 21 April 2005 11:38, Benjamin Franksen wrote: >> Has anyone ever succeeded in porting ghc to HP-UX 10.20 or later? > > Sidenote: The background is that I want to persuade people at work to > switch from CVS to darcs. It would be a lot easier to do so if I could > get darcs to compile under (at least) HP-UX 11. There are binaries for 4.08.2 that work on HP-UX (not sure which version, though). It's a 2-step bootstrap from 4.08.2: build 5.04.3, then use that to build 6.4. There are more recent binaries for Debian on HPPA, if that's any use. Cheers, Simon

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ghc for hp-ux 10.20 or 11
by Benjamin Franksen 21 Apr '05

21 Apr '05

Has anyone ever succeeded in porting ghc to HP-UX 10.20 or later? Ben

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wx library trouble
by Patrick Scheibe 21 Apr '05

21 Apr '05

Hi, I compiled successful the wxHaskell lib. But when I want to start ghci -package wx following error occurs: Loading package concurrent-1.0 ... linking ... done. Loading package wxcore-0.9 ... linking ... ghc-6.4.20050320: /home/izbifs/scheibe/built/lib/wxcore2.o: unknown symbol `wxcWakeUpIdle' *** Deleting temp files Deleting: ghc-6.4.20050320: unable to load package `wxcore-0.9' I have a running wxHaskell home. Same configuration... wxGtk version, wxhaskell version, same config options except of the prefix. In university it is installed local but I set the LD_LIBRARY_PATH. How can I figure out what's wrong? Can find out where and why the function `wxcWakeUpIdle' is available home and where are the differences? Has anybody a good hint where to start or what to check? Any help is welcome Cheers Patrick PS: Additional informations.. i386 GNU/Linux Fedora gtk+-1.2.10-33 gtk+-devel-1.2.10-33 wxGTK-2.4.2 wxHaskell 0.9 ghc version 6.4.20050320

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