February 2001 - Glasgow-haskell-users

RE: --add-package
by Simon Marlow 23 Feb '01

23 Feb '01

> In practice installation script of an external package does > --del-package before --add-package, because if it was > installed before, > --add-package would cause an error. > > Wouldn't be reasonable then to let --add-package overwrite > any existing > package of that name? There is no real safety, because the package > is explicitly deleted anyway. I don't think I agree. Installation of an external package shouldn't be doing --delete-package first: that should be left to the user (or rpm -e, or whatever). If you want to install a new package that replaces an existing one, you have to remove the existing one first. Cheers, Simon

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Re: Sockets on Windows
by Reuben Thomas 23 Feb '01

23 Feb '01

> administrator@DEFAULT /cygdrive/d/dom/home/socketTest > $ ./server1 8000 > > Fail: does not exist > Action: getProtocolByName > Reason: no such protocol entry Just from looking at the manpage for getprotobyname, I surmise that the problem is that you don't have an /etc/protocols file (or equivalent) under Windows. I'm not sure what's supposed to happen (or for that matter, what's supposed to work). Look in hslibs/net/BSD.lhs; I couldn't work out what was going on in a minute; perhaps someone else knows. The other thing I couldn't work out was where getProtocolByName was being called in the first place, but presumably it's to find the protocol number of tcp. -- http://sc3d.org/rrt/ | Slow Pedestrian Crossing

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Sockets on Windows
by Steinitz, Dominic J 23 Feb '01

23 Feb '01

I am was trying out sockets. These worked fine under linux. Under windows I get the following error. Does anyone know what it means and how I can fix it? I can telnet from within the cygwin window so I assume tcp/ip is running. Thanks, Dominic. administrator@DEFAULT /cygdrive/d/dom/home/socketTest $ ./server1 8000 Fail: does not exist Action: getProtocolByName Reason: no such protocol entry ------------------------------------------------------------------------------------------------- 21st century air travel http://www.britishairways.com

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--add-package
by qrczak＠knm.org.pl 23 Feb '01

23 Feb '01

In practice installation script of an external package does --del-package before --add-package, because if it was installed before, --add-package would cause an error. Wouldn't be reasonable then to let --add-package overwrite any existing package of that name? There is no real safety, because the package is explicitly deleted anyway. -- __("< Marcin Kowalczyk * qrczak(a)knm.org.pl http://qrczak.ids.net.pl/ \__/ ^^ SYGNATURA ZASTÊPCZA QRCZAK

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Re: Installation of mingw-20001111-1.tar.gz
by Byron Hale 21 Feb '01

21 Feb '01

Thanks, Reuben. You're very prompt. Byron byron.hale(a)einfo.com At 10:07 AM 2/21/2001 +0000, you wrote: > > I'm trying to install mingw-20001111-1.tar.gz for ghc4.08.2. The > > instructions on Win2K. The Web instructions seem a bit cavalier, but > > perhaps it is just my ignorance. > >Neither, really, it's just that we can't document our entire world >(documenting our system is hard enough). We are forced just to skate over >the externals. If you don't know about one or more of the pieces we rely on, >you should read their documentation (if it exists). > >However, within an hour or so I should have uploaded a fixed InstallShield >that works around what does indeed turn out to be a bug in mingwin, so you >won't need to bother with all this junk. > >-- >http://sc3d.org/rrt/ | Careful Cyclists Approaching From Right > > > >_______________________________________________ >Glasgow-haskell-users mailing list >Glasgow-haskell-users(a)haskell.org >http://www.haskell.org/mailman/listinfo/glasgow-haskell-users

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New GHC InstallShield: mingwin problem fixed
by Reuben Thomas 21 Feb '01

21 Feb '01

I have just uploaded a new GHC InstallShield. It fixes the recent problem with needing a particular version of the mingw package. Unfortunately the situation here is still unstable (roll on Cygwin 1.2), so it may break again, but it seems to work for now. -- http://sc3d.org/rrt/ | certain, a. insufficiently analysed

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Installation of mingw-20001111-1.tar.gz
by Byron Hale 21 Feb '01

21 Feb '01

Hi, I'm trying to install mingw-20001111-1.tar.gz for ghc4.08.2. The instructions on Win2K. The Web instructions seem a bit cavalier, but perhaps it is just my ignorance. ..."directory called mingw, place that in a directory called latest, then run the Cygwin installer "... Are these intended to be sub directories of Cygwin's "bin" directory, or what? Is the Cygwin "installer" "bin/install.exe?" If so, install with what options? Best Regards, Byron Hale byron.hale(a)einfo.com

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language shootout
by Brian Gregor 20 Feb '01

20 Feb '01

There's a page with microbenchmarks for a large array of languages, including Haskell: http://www.bagley.org/~doug/shootout/ and please note his disclaimer :-) : http://www.lib.uchicago.edu/keith/crisis/disclaimer.html Anyway, many of the categories are lacking a Haskell program. I've sent in 2. I thought that this could also serve as a nice little collection of examples for style and the use of some of the libraries in HSlibs for those of us (particularly me :) ) who are still learning the language. Any takers? -brian

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Exposing Haskell functions with String arguments in dll
by Janna Khegai 20 Feb '01

20 Feb '01

Hi, I want to expose the following Haskell function in dll to call it from Java application: trans: String -> IO String I read that I shoud use tools like GreenCard, HDirect or some marshalling libraries, but not sure, which way is better. If anyone has experience in this, I will be very grateful for an example, which shows the steps of bilding such dll. Thanks in advance, Janna Khegai.

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ANN: C->Haskell 0.8.1
by Manuel M. T. Chakravarty 19 Feb '01

19 Feb '01

I am pleased to announce the availability of version 0.8.1 of the interface generator C->Haskell. It works with the current stable release series 4.08.x of GHC as well as the current development series 4.11. For both versions of GHC, it supports the *same* FFI library that GHC natively only supports in the development version 4.11 and which constitutes the result of the work of the FFI Task Force over the last couple of months. The interface specification of the library is online available at http://www.cse.unsw.edu.au/~chak/haskell/c2hs/docu/c2hs-4.html For more information on C->Haskell and for downloading, see http://www.cse.unsw.edu.au/~chak/haskell/c2hs/ The main feature in this release is the new FFI library. It should allow users of the GHC stable series to use the new FFI library interface, which we hope to keep stable from now on. An update of the C->Haskell tool proper is being worked at. Happy Hacking, Manuel

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