- Glasgow-haskell-users

Stack trace on error (and packages)
by Andrew Cooke 11 Apr '01

11 Apr '01

Hi, Is it possible to persuade ghc/RTS to provide a stack trace (or something similar) when an error occurs? I have some code that is generating a runtime error (appears to be due to division by almost-zero, provoking very large numbers and then a NaN in a case statement when coerced to Double) in a function that is used throughout my code - it would be a big help to know which function called the function that is generating the error. Also, less importantly, how do I generate packages? I have a bunch of .o files (modules) all compiled using -package-name and -c, but I can't find the correct ghc flag to link them into a library (.a/Linux). Apologies if both/either of these are covered in the docs - I couldn't find a simple way of getting a stack trace and no info on actually linking to create a package (when I try various "obvious" things I get errors indicating a missing main). Thanks, Andrew PS Away from home, so having to use my work address. Please reply to the list (which I can read on the 'net and will subscribe to when I get home) or, if you want to avoid that, andrew(a)andrewcooke.free-online.co.uk, which I will read this weekend. Work isn't happy about non-work-related emails to this account. Sorry.

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ghc5.00 binary on Sparc?
by George Russell 10 Apr '01

10 Apr '01

GHC 5.00 looks wonderful. Would it be possible to make a binary distribution available for Sparc? As you may remember, I've had difficulty compiling it myself for Sparc, for some reason I don't know, and even if I find a way of hacking things to compile it, I'd rather users (= students) didn't have to . . .

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RE: How to box/unbox values?
by Julian Seward (Intl Vendor) 10 Apr '01

10 Apr '01

| -----Original Message----- | From: Thomas Pasch [mailto:pasch@netzGeneration.com] | Sent: Tuesday, April 10, 2001 12:55 AM | To: glasgow-haskell-users(a)haskell.org | Subject: How to box/unbox values? | | | Hello, | | is there an easy way to box/unbox Types. | I need this for Int's, so is there | a function that does: | | Int# -> Int | Int -> Int# import GlaExts ( Int(..) ) iBox x = I# x iUnbox (I# x) = x

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How to box/unbox values?
by Thomas Pasch 10 Apr '01

10 Apr '01

Hello, is there an easy way to box/unbox Types. I need this for Int's, so is there a function that does: Int# -> Int Int -> Int# Regards, Thomas

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failed when trying to compile FranTk with ghc
by luc 09 Apr '01

09 Apr '01

I tried FranTk with ghc 4.08 and got : (this is the "fixed" FrankTk, alledged working with 4.06, if im not wrong) are there any difference with 4.06 and 4.08 ? ------------------------------------------------------------------------ ==fptools== gmake boot - --no-print-directory -r; in /home/luc/tmp/FranTk/src/FranSrc ------------------------------------------------------------------------ ghc -M -optdep-f -optdep.depend -optdep-o -optdepo -O -fglasgow-exts -recomp -dcore-lint -fvia-C -syslib concurrent -i../TclHaskellSrc Compatibility.ghc.hs BaseTypes.hs Force.hs MutSet.hs Event.hs BPrim.hs WorkPool.hs FranTime.hs Behavior.hs FranPrim.hs Listener.hs ColorCore.hs Vector2.hs VectorSpace.hs Point2.hs Vector3.hs Point3.hs Transform2.hs Rect.hs Transform3.hs StaticTypes.hs ColorCoreB.hs Point2B.hs Point3B.hs Vector2B.hs Vector3B.hs RectB.hs Transform2B.hs Transform3B.hs BehaviorTypes.hs VectorSpaceB.hs BehaviorIO.hs FranCore.hs FranBehavior.hs No file `PrelNumExtra.hi', `PrelNumExtra.lhs', `PrelNumExtra.hs' (reqd from file `Compatibility.ghc.hs') among import directories: ../TclHaskellSrc:. gmake[2]: *** [depend] Error 1 gmake[1]: *** [boot] Error 1

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Re: process file table full?
by Mike Gunter 07 Apr '01

07 Apr '01

One might think it would be best to trigger a garbage collection before giving up and raising the exception. Or no? mike "Simon Marlow" <simonmar(a)microsoft.com> writes: > > Yesterday I asked for the posssible reasons of > > > > > Fail: resource exhausted > > > Action: openFile > > > Reason: process file table full connect-985988146.log > > > > Writing that particular file wasn't the cause, but just a symptom. > > > > It seems that I forgot to close filehandles obtained from > > Socket.accept. > > I somehow thought they were garbage collecteted, but > > apparently the weren't. > > They should be garbage collected and closed automatically. But it may > be some time between the handle becoming garbage and it finally being > closed, so if you're accepting connections at a fast rate, it's always a > good idea to close the handle explicitly when you finish with it. > > Cheers, > Simon

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RE: About rules
by Simon Peyton-Jones 06 Apr '01

06 Apr '01

No good reason. I've implemented the one-line change in my copy but we're in a code freeze until we release GHCi 5.00 on Monday. After that I'll commit it. Good idea, thank you. Simon | -----Original Message----- | From: Josef Svenningsson [mailto:josefs@cs.chalmers.se] | Sent: 05 April 2001 16:29 | To: glasgow-haskell-users(a)haskell.org | Subject: About rules | | | Hi all! | | I've been playing around with the rules facility a bit. There | is a boring shortcoming when working with infix operators. It | seems that the rule parser doesn't like them at all. The | following example gives syntax error: | | {-# RULES | "plus/mult" forall p . p + p = 2 * p | #-} | | whereas the following is allright: | | {-# RULES | "plus/mult" forall p . (+) p p = (*) 2 p | #-} | | It's not a big problem, but it's rather inconvenient and | ugly. Is it easy to fix? | | Cheers, | /Josef | | | _______________________________________________ | 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: [Q] bootstrapping ghc on netbsd
by Simon Marlow 06 Apr '01

06 Apr '01

> QUESTION: Is there an easy way of keeping ghc-4.08.2 from using any > assembler code when compiling it from .hc files + sources? No, there isn't an easy way. When compiling via C, GHC "mangles" the assembly output from the C compiler in order to support tail calls and some other optimisations. There's a native code generator, but currenly it can't be used for some of the library code. > DETAILS: Why do I want to do this? gmp-2.0.2 has some problems > compiling on netbsd machines that can be solved by hiding all > assembler code from the compiler. I think this was a misconfiguration problem with GMP, as I mentioned in my other message to glasgow-haskell-bugs. > Having done so, I managed to > bootstrap on NetBSD 1.3.2, but still have an inplace-compiler failure > on 1.5. The error message is from the gcc assembler (see below), so I > thought trying a pure C variant might help somewhat. This is almost certainly an incompatibility between the exact flavour of GCC being used on NetBSD 1.5, and our assembly mangling machinery. If you add the flag -ddump-raw-asm, and send me the output, I might be able to tell what's wrong. Cheers, Simon

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About rules
by Josef Svenningsson 05 Apr '01

05 Apr '01

Hi all! I've been playing around with the rules facility a bit. There is a boring shortcoming when working with infix operators. It seems that the rule parser doesn't like them at all. The following example gives syntax error: {-# RULES "plus/mult" forall p . p + p = 2 * p #-} whereas the following is allright: {-# RULES "plus/mult" forall p . (+) p p = (*) 2 p #-} It's not a big problem, but it's rather inconvenient and ugly. Is it easy to fix? Cheers, /Josef

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[Q] bootstrapping ghc on netbsd
by fis＠ssh.com 05 Apr '01

05 Apr '01

Dear all, QUESTION: Is there an easy way of keeping ghc-4.08.2 from using any assembler code when compiling it from .hc files + sources? DETAILS: Why do I want to do this? gmp-2.0.2 has some problems compiling on netbsd machines that can be solved by hiding all assembler code from the compiler. Having done so, I managed to bootstrap on NetBSD 1.3.2, but still have an inplace-compiler failure on 1.5. The error message is from the gcc assembler (see below), so I thought trying a pure C variant might help somewhat. I undefined i386_{HOST,TARGET,BUILD}_ARCH in $(TOP)/mk/config.mk but it had no effect. thanks for any hints, Matthias ====================================================================== rm -f Addr.o ; if [ ! -d Addr ]; then mkdir Addr; else /usr/bin/find Addr -name '*.o' -print | xargs rm -f __rm_food ; fi ; ../../ghc/driver/ghc-inplace -recomp -cpp -fglasgow-exts -fvia-C -Rghc-timing -I../../ghc/includes -imonads -static -O -package-name lang -split-objs -c Addr.hc -o Addr.o -osuf o Funny global thing?: __stg_split_marker1: Funny global thing?: _module_registered: Funny global thing?: __init_Addr: Funny global thing?: __stg_split_marker2: Funny global thing?: __stg_split_marker3: [...] Funny global thing?: __stg_split_marker89: Funny global thing?: __stg_split_marker90: Prologue junk?: .globl __stg_split_marker2 __stg_split_marker2: ret .Lfe3: .size __stg_split_marker2,.Lfe3-__stg_split_marker2 .globl Addr_lvl_closure .data .align 4 .type Addr_lvl_closure,@object .size Addr_lvl_closure,4 Addr_lvl_closure: .long Addr_lvl_info .globl Addr_lvl_info .section .rodata .align 4 .type Addr_lvl_info,@object .size Addr_lvl_info,12 Addr_lvl_info: .long 0 .word 0 .word 0 .word 17 .word 0 .text .align 4 .globl Addr_lvl_entry .type Addr_lvl_entry,@function Addr_lvl_entry: gmake[2]: *** [Addr.o] Error 255 ====================================================================== -- Matthias Fischmann | Research Engineer | +358 (9) 8565 7474 fis(a)ssh.fi | SSH Communication Security Corp. | +358 (40) 752 5291

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