January 2007 - Yhc - Haskell.org

Data.Typeable
by Neil Mitchell 14 Jan '07

14 Jan '07

Hi Tom and Yhc, I remember that you previously mentioned that you had implemented Yhc.Typeable or something similar which provides an interface which is a superset of Data.Typeable. Is that reliable? Does it really provide a superset of the implementation? It appears that quite a few of the patches required to get Yhc compiling the base libraries are to remove Data.Typeable. These patches could be reduced if Data.Typeable could be implemented in a Yhc specific way. Thanks Neil

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Adding stuff to Prelude (cont'd)
by Dimitry Golubovsky 14 Jan '07

14 Jan '07

Hi, However, after I tried to recompile the whole yhc-base package with Prelude.hi left after the last compilation, I ended up with weird error messages, and only restoration of the Prelude interface file from bootstrap helped. So, what is the correct way to add stuff to Prelude? Thanks. -- Dimitry Golubovsky Anywhere on the Web

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buildbot failure in macosx_x86
by andrewjwilkinsonw＠gmail.com 12 Jan '07

12 Jan '07

The Buildbot has detected a failed build of macosx_x86. Full details are available at: http://www.indiegigs.co.uk:8010/macosx_x86/builds/32 Buildbot URL: http://www.indiegigs.co.uk:8010/ Buildslave for this Build: macosxx86 Build Reason: Build Source Stamp: HEAD Blamelist: Neil Mitchell BUILD FAILED: failed failed slave lost sincerely, -The Buildbot

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buildbot failure in gentoo_amd64
by andrewjwilkinsonw＠gmail.com 12 Jan '07

12 Jan '07

The Buildbot has detected a failed build of gentoo_amd64. Full details are available at: http://www.indiegigs.co.uk:8010/gentoo_amd64/builds/20 Buildbot URL: http://www.indiegigs.co.uk:8010/ Buildslave for this Build: gentooamd64 Build Reason: Build Source Stamp: HEAD Blamelist: Christopher Lane Hinson <lane(a)downstairspeople.org>,Neil Mitchell BUILD FAILED: failed library sincerely, -The Buildbot

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buildbot failure in gentoo_x86
by andrewjwilkinsonw＠gmail.com 12 Jan '07

12 Jan '07

The Buildbot has detected a failed build of gentoo_x86. Full details are available at: http://www.indiegigs.co.uk:8010/gentoo_x86/builds/53 Buildbot URL: http://www.indiegigs.co.uk:8010/ Buildslave for this Build: markus1 Build Reason: The web-page 'force build' button was pressed by '': Build Source Stamp: HEAD Blamelist: BUILD FAILED: failed library sincerely, -The Buildbot

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buildbot failure in gentoo_x86
by andrewjwilkinsonw＠gmail.com 12 Jan '07

12 Jan '07

The Buildbot has detected a failed build of gentoo_x86. Full details are available at: http://www.indiegigs.co.uk:8010/gentoo_x86/builds/52 Buildbot URL: http://www.indiegigs.co.uk:8010/ Buildslave for this Build: markus1 Build Reason: Build Source Stamp: HEAD Blamelist: Christopher Lane Hinson <lane(a)downstairspeople.org>,Neil Mitchell BUILD FAILED: failed library sincerely, -The Buildbot

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Added stuff to Prelude
by Dimitry Golubovsky 11 Jan '07

11 Jan '07

Hi, I've done it as Malcolm suggested, that is, manually. Now we have instance Functor Maybe. PS I tested full recompilation of both packages: worked for me. -- Dimitry Golubovsky Anywhere on the Web

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Re: Yhc Digest, Vol 14, Issue 3
by Christopher Lane Hinson 11 Jan '07

11 Jan '07

> An instance Functor Maybe was missing, and I tried to add it to > Prelude (where both Functor and Maybe are defined, to avoid orphan > instance issues). It turns out, every time Prelude.hs is recompiled, > its interface file is overwritten with one from bootstrap. What is the > purpose of this? I'd assume the opposite: if Prelude got recompiled, > the bootstrap interface has to be updated, so one getting a clean > distribution would have prelude interface intact. Is this an error in > SConscript? Or am I missing something? > > For now, I just commented out three lines in SConscript responsible > for the yhc-base package compilation. The new instance is now visible. > > I haven't committed this to the central repo; I'd like to get some > explanation of this first. I also haven't submitted a patch that also had to implement instance Functor Maybe. We seem to have a very similar problem. >> Apparently there are problems with orphan instances, and perhaps >> passing -prelude when compiling the file with the instance in it will >> work. If that doesn't work email the list, since its probably an nhc >> issue originally. For clarity: I did a quick test. I think that orphan instances work when they involve non-prelude names. What I was told by someone else is that all names that appear in the prelude might not be exported unless -prelude, which is a different problem. I originally suggested that orphan instances didn't work because it didn't occur to me that prelude names would be given special treatment. --Lane

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Adding stuff to Prelude (was: Trying to compile Fudgets with Yhc...)
by Dimitry Golubovsky 11 Jan '07

11 Jan '07

Hi, Following up my own message about problems compiling Fudgets with Yhc. An instance Functor Maybe was missing, and I tried to add it to Prelude (where both Functor and Maybe are defined, to avoid orphan instance issues). It turns out, every time Prelude.hs is recompiled, its interface file is overwritten with one from bootstrap. What is the purpose of this? I'd assume the opposite: if Prelude got recompiled, the bootstrap interface has to be updated, so one getting a clean distribution would have prelude interface intact. Is this an error in SConscript? Or am I missing something? For now, I just commented out three lines in SConscript responsible for the yhc-base package compilation. The new instance is now visible. I haven't committed this to the central repo; I'd like to get some explanation of this first. Thanks On 1/10/07, Neil Mitchell <ndmitchell(a)gmail.com> wrote: > Dimitry, > > Apparently there are problems with orphan instances, and perhaps > passing -prelude when compiling the file with the instance in it will > work. If that doesn't work email the list, since its probably an nhc > issue originally. -- Dimitry Golubovsky Anywhere on the Web

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Trying to compile Fudgets with Yhc...
by Dimitry Golubovsky 10 Jan '07

10 Jan '07

Hi, I am trying to get some pieces of Fudgets work in Javascript, and tried to compile some basic modules (stream processor primitives). My goal is to be able to compile unmodified code in its current (pre-cabalized) layout (there are more than 300 modules in Fudgets, so it is easy to break something if changing a lot) I cannot compile EitherUtils.hs http://www.golubovsky.org/repos/Fudgets/hsrc/utils/EitherUtils.hs ========================== Compiling EitherUtils ( ../../../home/dima/ext/workdirs/Fudgets/hsrc/utils/EitherUtils.hs ) yhc: The class Prelude.Functor has no instance for the type Prelude.Maybe. Possible sources for the problem are: 7:13-7:16 When type checking declarations at: 7:1-7:34 ========================== The line in question is: plookup p = fmap snd . find (p.fst) Commenting it out makes the module compilable, but plookup is indeed used somewhere. There was no needed instance in Prelude.hs. I added it (from Hugs, but I believe it is standard): instance Functor Maybe where fmap _ Nothing = Nothing fmap f (Just a) = Just (f a) and then recompiled everything under packages. The problem did not disappear. I even replaced `import Maybe' with `import Data.Maybe', it did not help. I moved the instance definition to Data/Maybe.hs, again no help. What could it be? Thanks. PS Fudgets were compilable by NHC98, weren't they? -- Dimitry Golubovsky Anywhere on the Web

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