- Glasgow-haskell-users

problem compiling GUM
by Hal Daume III 26 Feb '02

26 Feb '02

Hi all, I'm not sure if this is the appropriate place to ask about this, but there's no GPH mailing list. I recently downloaded the source for GUM-4.06-291100 and am having difficulty getting it to compile. The complaint it gives is: utils/Argv.lhs: can't locate import `Addr' <<ghc: 1972928 bytes, 2 GCs, 112168/112168 avg/max bytes residency (1 samples),\ 5M in use, 0.02 INIT (0.02 elapsed), 0.04 MUT (0.23 elapsed), 0.07 GC (0.11 el\ apsed) :ghc>> gmake[2]: *** [depend] Error 1 gmake[1]: *** [boot] Error 1 gmake: *** [boot] Error 1 But I don't really know anything about what's going wrong :). I'm hoping someone can help me out. I've attached full transcripts of the build process (gzipped so people don't complain about huge attachments). Please please help me out here :). I already have ghc5.02.1 installed, so on one of the builds i specified --with-hc to use this; on the other i didn't. neither worked. Thanks! - Hal -- Hal Daume III "Computer science is no more about computers | hdaume(a)isi.edu than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume

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Re: Straightforward conversion from Int <-> Word
by Jan-Willem Maessen 26 Feb '02

26 Feb '02

Simon Marlow notes: > But fromIntegral *does* do the right thing, doesn't it? > > > Numeric.showHex (fromIntegral (-1 :: Int32) :: Word32) "" > "0xffffffff" Interesting. The fact that this fooled Julian as well as me suggests the behavior needs to be better documented. Interestingly, hugs yields an error. I'm going to follow up in more detail to haskell, as this is really about the behavior of "fromInteger", and has nothing to do with Word32 or Int32 per se at all. -Jan

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RE: multiple processes and threads
by Simon Marlow 26 Feb '02

26 Feb '02

> I have an application that uses multiple processes and > multiple threads > together. What's the best way to detect child process terminations? > > The initial thread in the inital process serves as driver of the > application. It creates child processes and threads to carry out > portions of the computation. A natural way to have the driver detect > termination of these child processes and threads would be to have the > driver "listen" on a single MVar to which termination notices are > "posted". Child threads would simply post their termination notices > directly. For child processes, I'd like to have a single > thread in the > initial process execute (getAnyProcessStatus True False) repeatedly, > posting a termination notice each time such a call returns. However, > with the current implementation of Concurrent Haskell, when the thread > pends on the getAnyProcessStatus call, the entire initial process > pends. The best solution I've come up with so far, which is > unsatisfying, is to have this thread poll periodically (that is, loop > over (getAnyProcessStatus False False) and (threadDelay)). Is there a > better way? One (possibly better) way is to listen for SIGCLD. This has been discussed a couple of times before, threads here: http://www.haskell.org/pipermail/glasgow-haskell-users/2001-July/002079.html http://www.haskell.org/pipermail/glasgow-haskell-users/2001-September/00227… The upshot is the GHC *should* provide a better mechanism than it does currently, but it doesn't, sorry :-) Cheers, Simon

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RE: Building ghc-5.00.2 from .hc files
by Simon Marlow 26 Feb '02

26 Feb '02

> I have tried do build ghc-5.00.2 from .hc files. I run > ditrib/hc-build, > but it fails: > > -------------------------------------------------------------- > ---------- > ===fptools== Finished making `all' in cbits ... > PWD = /tmp/ghc-5.00.2/hslibs/lang > -------------------------------------------------------------- > ---------- > make[1]: *** No rule to make target `Addr.o', needed by `libHSlang.a'. > Stop. > make: *** [all] Error 1 > make: Leaving directory `/tmp/ghc-5.00.2/hslibs' > > My box is ix86 running Linux (but I could not use binary version of > ghc). > Could you tell me what I should do to compile it from .hc files ? Building from .hc files is not very well supported, and is a highly involved process in 5.xx. If you really can't use any of the binary distributions, I suggest starting from 4.08.2 which should be a lot smoother to bootstrap from .hc files. Cheers, Simon

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RE: Doubts in GHC
by Simon Marlow 26 Feb '02

26 Feb '02

> I´m new in this list and I think that it´s a very good > idea, because we > can show our doubts. > I have a doubt in GHC: How can we include a folder in the compiling > process? Example: If one file called main.hs requires some > others modules > that are in one folder, how can compile it in GHC and include > this folder? ghc --make -i<folder> main.hs Cheers, Simon

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RE: Straightforward conversion from Int <-> Word
by Simon Marlow 26 Feb '02

26 Feb '02

If intToNat is a blunt instrument, then fromIntegral is the rapier :-) Remember Word is GHC-specific; the FFI doesn't define it. Simon > -----Original Message----- > From: Julian Seward (Intl Vendor) [mailto:v-julsew@microsoft.com] > Sent: 25 February 2002 16:57 > To: jmaessen(a)alum.mit.edu; glasgow-haskell-users(a)haskell.org > Subject: RE: Straightforward conversion from Int <-> Word > > > > I've found this annoying in the past, and have resorted to hitting > it on the head (GHC-specifically) with a blunt instrument: > > intToNat :: Int -> Word > intToNat (I# i#) = W# (unsafeCast# i#) > > This probably defeats the good intentions of the FFI designers, > but it kinda seems like it'll work on all reasonable architectures. > > J > > | -----Original Message----- > | From: Jan-Willem Maessen [mailto:jmaessen@alum.mit.edu] > | Sent: Monday, February 25, 2002 4:46 PM > | To: glasgow-haskell-users(a)haskell.org > | Subject: Straightforward conversion from Int <-> Word > | > | > | I've cast about a bit and haven't been able to find the appropriate > | functionality, so I'm asking here. > | > | I'd like to convert Int32 to and from Word32 in the good > old-fashioned > | bitwise fashion (perserving modular arithmetic). I have > the following > | code to show what I mean: > | > | intToNat i > | | i >= 0 = fromIntegral i > | | otherwise = fromIntegral (i - minBound) + negBound > | where negBound = fromInteger . negate . toInteger $ > | (minBound :: Int) > | > | One might think that "intToWord32" and "word32ToInt" in lang/Word > | would do what I want---but no! These are depracated, and I must use > | fromIntegral, which will only perform the conversion > correctly for the > | portions of the numeric range which overlap. > | > | How do I do the straightforward conversion module 2^32? > I'm sure it's > | buried in there somewhere... I can't even turn up an > appropriate type > | signature, though. > | > | -Jan-Willem Maessen > | > | _______________________________________________ > | Glasgow-haskell-users mailing list > | Glasgow-haskell-users(a)haskell.org > | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users > | > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users(a)haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users >

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RE: Straightforward conversion from Int <-> Word
by Simon Marlow 26 Feb '02

26 Feb '02

> -----Original Message----- > From: Jan-Willem Maessen [mailto:jmaessen@alum.mit.edu] > Sent: 25 February 2002 16:46 > To: glasgow-haskell-users(a)haskell.org > Subject: Straightforward conversion from Int <-> Word > > > I've cast about a bit and haven't been able to find the appropriate > functionality, so I'm asking here. > > I'd like to convert Int32 to and from Word32 in the good old-fashioned > bitwise fashion (perserving modular arithmetic). I have the following > code to show what I mean: > > intToNat i > | i >= 0 = fromIntegral i > | otherwise = fromIntegral (i - minBound) + negBound > where negBound = fromInteger . negate . toInteger $ > (minBound :: Int) > > One might think that "intToWord32" and "word32ToInt" in lang/Word > would do what I want---but no! These are depracated, and I must use > fromIntegral, which will only perform the conversion correctly for the > portions of the numeric range which overlap. > > How do I do the straightforward conversion module 2^32? I'm sure it's > buried in there somewhere... I can't even turn up an appropriate type > signature, though. But fromIntegral *does* do the right thing, doesn't it? > Numeric.showHex (fromIntegral (-1 :: Int32) :: Word32) "" "0xffffffff" it does it by a kind of roundabout route, but this is the defined behaviour (at least in GHC). And if you turn optimisation on, the fromIntegral should reduce to a simple cast. Cheers, Simon

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Doubts in GHC
by Fernando Lins 25 Feb '02

25 Feb '02

Hello, IŽm new in this list and I think that itŽs a very good idea, because we can show our doubts. I have a doubt in GHC: How can we include a folder in the compiling process? Example: If one file called main.hs requires some others modules that are in one folder, how can compile it in GHC and include this folder? Thanks, Fernando _________________________________________________________________ Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com

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multiple processes and threads
by Dean Herington 25 Feb '02

25 Feb '02

I have an application that uses multiple processes and multiple threads together. What's the best way to detect child process terminations? The initial thread in the inital process serves as driver of the application. It creates child processes and threads to carry out portions of the computation. A natural way to have the driver detect termination of these child processes and threads would be to have the driver "listen" on a single MVar to which termination notices are "posted". Child threads would simply post their termination notices directly. For child processes, I'd like to have a single thread in the initial process execute (getAnyProcessStatus True False) repeatedly, posting a termination notice each time such a call returns. However, with the current implementation of Concurrent Haskell, when the thread pends on the getAnyProcessStatus call, the entire initial process pends. The best solution I've come up with so far, which is unsatisfying, is to have this thread poll periodically (that is, loop over (getAnyProcessStatus False False) and (threadDelay)). Is there a better way? Dean Herington

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RE: Straightforward conversion from Int <-> Word
by Julian Seward (Intl Vendor) 25 Feb '02

25 Feb '02

I've found this annoying in the past, and have resorted to hitting it on the head (GHC-specifically) with a blunt instrument: intToNat :: Int -> Word intToNat (I# i#) = W# (unsafeCast# i#) This probably defeats the good intentions of the FFI designers, but it kinda seems like it'll work on all reasonable architectures. J | -----Original Message----- | From: Jan-Willem Maessen [mailto:jmaessen@alum.mit.edu] | Sent: Monday, February 25, 2002 4:46 PM | To: glasgow-haskell-users(a)haskell.org | Subject: Straightforward conversion from Int <-> Word | | | I've cast about a bit and haven't been able to find the appropriate | functionality, so I'm asking here. | | I'd like to convert Int32 to and from Word32 in the good old-fashioned | bitwise fashion (perserving modular arithmetic). I have the following | code to show what I mean: | | intToNat i | | i >= 0 = fromIntegral i | | otherwise = fromIntegral (i - minBound) + negBound | where negBound = fromInteger . negate . toInteger $ | (minBound :: Int) | | One might think that "intToWord32" and "word32ToInt" in lang/Word | would do what I want---but no! These are depracated, and I must use | fromIntegral, which will only perform the conversion correctly for the | portions of the numeric range which overlap. | | How do I do the straightforward conversion module 2^32? I'm sure it's | buried in there somewhere... I can't even turn up an appropriate type | signature, though. | | -Jan-Willem Maessen | | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users(a)haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users |

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