RE: sigCHLD signal handling (Was: Re: pipes? threadWaitRead?)
I had thought of having the signal handler reap as many terminated child processes as possible, but had been concerned about a possible race condition. After you suggested that approach, I thought some more and decided that no race problem should exist. So I've implemented multiple reaping and it does help. I no longer have any tests hang as before. (Note that I still do see the occasional EVACUATED object entered! error.) However, the implementation turned out to be surprisingly complex. Can you manage to get a repeatable case of the 'EVACUATED object' error? I'd really like to track that one down. The first issue I confronted is that the get*ProcessStatus routines return an error rather than nothing if there is no candidate child process. (The GHC routines simply reflect the system call semantics.) So can't you just catch the error? Something like handler = do r - try (getAnyProcessStatus ...) case r of Left _ - return () Right _ - handler Cheers, Simon ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
RE: ObjectIO
I then upgraded my version to 5.02.3 and now ObjectIO doesn't work anywhere anymore. The linker complains in literally thousands of errors like the ones shown below. This is a shame because we did like the ObjectIO library. Ah, my colleague has just installed 5.02.1 and now it works on his system. Yes, if you upgrade your version of GHC you need to recompile *any* code that was compiled by a previous version of GHC. The compiler should be better about giving warnings in this case (I believe 5.04 will complain about patchlevel differences in interface files now). Chees, Simon ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
unable to create DLL with GHC 5.04
Hi! I seem to have some problem building DLLs under Win32 with GHC 5.04. When I follow the instructions from http://haskell.cs.yale.edu/ghc/docs/latest/html/users_guide/win32-dlls-foreign.html all looks ok until I do the last step. Then linker reports: /usr/lib/gcc-lib/i686-pc-cygwin/2.95.3-5/../../../../i686-pc-cygwin/bin/ld: warning: cannot find entry symbol _DllMainCRTStartup@12; defaulting to 63601000 C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xab1):StgMiscClosures.hc: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xae5):StgMiscClosures.hc: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xb19):StgMiscClosures.hc: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xb4d):StgMiscClosures.hc: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xb81):StgMiscClosures.hc: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xbb5):StgMiscClosures.hc: more undefined references to `_imp___iob' follow collect2: ld returned 1 exit status dllwrap: gcc exited with status 1 With GHC 5.02.x all seemed to work fine... Best regards, Mark ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: unable to create DLL with GHC 5.04
Hi, looks as if you're mixing mingw and cygwin object files. ghc-5.04 is mingw-based, so make sure you feed in the flag -mno-cygwin to gcc when compiling .c files. --sigbjorn - Original Message - From: Mark Tehver [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, July 11, 2002 12:42 Subject: unable to create DLL with GHC 5.04 Hi! I seem to have some problem building DLLs under Win32 with GHC 5.04. When I follow the instructions from http://haskell.cs.yale.edu/ghc/docs/latest/html/users_guide/win32-dlls-forei gn.html all looks ok until I do the last step. Then linker reports: /usr/lib/gcc-lib/i686-pc-cygwin/2.95.3-5/../../../../i686-pc-cygwin/bin/ld: warning: cannot find entry symbol _DllMainCRTStartup@12; defaulting to 63601000 C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xab1):StgMiscClosures.h c: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xae5):StgMiscClosures.h c: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xb19):StgMiscClosures.h c: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xb4d):StgMiscClosures.h c: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xb81):StgMiscClosures.h c: undefined reference to `_imp___iob' C:/ghc/ghc-5.04/libHSrts.a(StgMiscClosures.o)(.text+0xbb5):StgMiscClosures.h c: more undefined references to `_imp___iob' follow collect2: ld returned 1 exit status dllwrap: gcc exited with status 1 With GHC 5.02.x all seemed to work fine... Best regards, Mark ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
chat multitasking e suola di sesso live
http://www.ragazze-sexy.tv La boutique dell'eros si è arricchita di una chicca: nuovissima chat multisking, con riprese aeree multicam, con più inquadrature, e maggiore risoluzione. New entry anche di ragazze internazionali, per la chat multilingue. Scuola di sesso live con lezioni per allungamento del pene e individuazione punto G. http://www.ragazze-sexy.tv ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: ANNOUNCE: GHC version 5.04 released
Simon Marlow [EMAIL PROTECTED] writes: The (Interactive) Glasgow Haskell Compiler -- version 5.04 Packages will appear as they are built - if the package for your system isn't available yet, come back later. A Windows installer for 5.04 is now available via the GHC downloads page: http://haskell.org/ghc/download_ghc_504.html --sigbjorn ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: ANNOUNCE: GHC version 5.04 released
On Thursday 11 July 2002 19:19, Sigbjorn Finne wrote: A Windows installer for 5.04 is now available via the GHC downloads page: http://haskell.org/ghc/download_ghc_504.html /me pings debian people. we can't lag behind windows, come on ;) -- Eray Ozkural (exa) [EMAIL PROTECTED] Comp. Sci. Dept., Bilkent University, Ankara www: http://www.cs.bilkent.edu.tr/~erayo Malfunction: http://mp3.com/ariza GPG public key fingerprint: 360C 852F 88B0 A745 F31B EA0F 7C07 AE16 874D 539C ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: CATALOG RH 7.3
On Fri, Jul 12, 2002 at 12:34:39AM +1000, Manuel M T Chakravarty wrote: Since I updated to RedHat 7.3, configure doesn't seem to be able to determine a valid DocBook catalog anymore. Anybody else seen this problem or is there something wrong in my setup? Manuel Same problem on OpenBSD. The catalog file is stored in /usr/local/share/sgml on my system, and is not found. Hence: --- configure.orig Thu Jul 11 21:02:09 2002 +++ configure Thu Jul 11 21:02:51 2002 @@ -2550,7 +2550,7 @@ Test. EOF fptools_cv_sgml_catalog=no if test -z $SGML_CATALOG_FILES ; then - for fptools_catalog in /etc/sgml/catalog /etc/sgml.catalog /usr/share/sgml/CAT ALOG.docbkdsl glafp-utils/docbook/CATALOG*; do + for fptools_catalog in /usr/local/share/sgml/catalog /etc/sgml/catalog /etc/sg ml.catalog /usr/share/sgml/CATALOG.docbkdsl glafp-utils/docbook/CATALOG*; do ac_try=$JadeCmd -t rtf -d docs/fptools-both.dsl#print -c $fptools_catalog c onftest.sgml Don ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: ANNOUNCE: GHC version 5.04 released
At 2002-07-11 11:22, Eray Ozkural wrote: A Windows installer for 5.04 is now available via the GHC downloads page: http://haskell.org/ghc/download_ghc_504.html /me pings debian people. we can't lag behind windows, come on ;) I'm sure Michael Weber is working on it even as we speak... -- Ashley Yakeley, Seattle WA ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: CATALOG RH 7.3
[EMAIL PROTECTED] (Donald Bruce Stewart) wrote, On Fri, Jul 12, 2002 at 12:34:39AM +1000, Manuel M T Chakravarty wrote: Since I updated to RedHat 7.3, configure doesn't seem to be able to determine a valid DocBook catalog anymore. Anybody else seen this problem or is there something wrong in my setup? Same problem on OpenBSD. The catalog file is stored in /usr/local/share/sgml on my system, and is not found. Hence: I added the location needed for OpenBSD to configure.in in CVS. Thanks, Manuel ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
ANNOUNCE: GHC version 5.04 released
The (Interactive) Glasgow Haskell Compiler -- version 5.04
We are pleased to announce a new major release of the Glasgow Haskell
Compiler (GHC), version 5.04.
Highlights include:
* Hierarchical libraries, with documentation produced by Haddock.
* New type system extensions: full rank-N types and kind
annotations.
* New heap profiling facilities (retainer profiling, biographical
profiling).
* MacOS X support
See the release notes for a full list of the changes:
http://www.haskell.org/ghc/docs/latest/html/users_guide/release-5-04.htm
l
How to get it
~
The easy way is to go to the WWW page, which should be self-explanatory:
http://www.haskell.org/ghc/
We supply binary builds in the native package format for various
flavours of Linux and BSD, and in InstallShield form for Windows
folks. Binary builds for other platforms are available as a .tar.bz2
which can be installed wherever you want. The source distribution is
also available from the same place.
Packages will appear as they are built - if the package for your system
isn't available yet, come back later.
Background
~~
Haskell is a standard lazy functional programming language; the
current language version is Haskell 98, agreed in December 1998.
GHC is a state-of-the-art programming suite for Haskell. Included is
an optimising compiler generating good code for a variety of
platforms, together with an interactive system for convenient, quick
development. The distribution includes space and time profiling
facilities, a large collection of libraries, and support for various
language extensions, including concurrency, exceptions, and foreign
language interfaces (C, whatever). GHC is distributed under a
BSD-style open source license.
A wide variety of Haskell related resources (tutorials, libraries,
specifications, documentation, compilers, interpreters, references,
contact information, links to research groups) are available from the
Haskell home page (see below).
On-line GHC-related resources
~~
Relevant URLs on the World-Wide Web:
GHC home page http://www.haskell.org/ghc/
Haskell home page http://www.haskell.org/
comp.lang.functional FAQ http://www.cs.nott.ac.uk/~gmh/faq.html
System requirements
~~~
To compile programs with GHC, you need a machine with 64+MB memory, GCC
and perl. This release is known to work on the following platforms:
* i386-unknown-{linux,*bsd,mingw32}
* sparc-sun-solaris2
* alpha-dec-osf3
* powerpc-apple-darwin (MacOS/X)
Ports to the following platforms should be relatively easy (for a
wunderhacker), but haven't been tested due to lack of time/hardware:
* hppa1.1-hp-hpux{9,10}
* i386-unknown-solaris2
* mips-sgi-irix{5,6}
* {rs6000,powerpc}-ibm-aix
The builder's guide on the web site gives a complete run-down of what
ports work; it can be found at
http://www.haskell.org/ghc/docs/latest/html/building/building-guide.html
Mailing lists
~
We run mailing lists for GHC users and bug reports; to subscribe, use
the web interfaces at
http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
There are several other haskell and ghc-related mailing lists on
www.haskell.org; for the full list, see
http://www.haskell.org/mailman/listinfo/
Please report bugs using our SourceForge page at
http://sourceforge.net/projects/ghc/
or send them to [EMAIL PROTECTED]
GHC users hang out on [EMAIL PROTECTED] Bleeding
edge CVS users party on [EMAIL PROTECTED]
___
Haskell mailing list
[EMAIL PROTECTED]
http://www.haskell.org/mailman/listinfo/haskell
Re: ANNOUNCE: GHC version 5.04 released
Simon Marlow [EMAIL PROTECTED] writes: The (Interactive) Glasgow Haskell Compiler -- version 5.04 Packages will appear as they are built - if the package for your system isn't available yet, come back later. A Windows installer for 5.04 is now available via the GHC downloads page: http://haskell.org/ghc/download_ghc_504.html --sigbjorn ___ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
Re: ANNOUNCE: GHC version 5.04 released
On Thursday 11 July 2002 19:19, Sigbjorn Finne wrote: A Windows installer for 5.04 is now available via the GHC downloads page: http://haskell.org/ghc/download_ghc_504.html /me pings debian people. we can't lag behind windows, come on ;) -- Eray Ozkural (exa) [EMAIL PROTECTED] Comp. Sci. Dept., Bilkent University, Ankara www: http://www.cs.bilkent.edu.tr/~erayo Malfunction: http://mp3.com/ariza GPG public key fingerprint: 360C 852F 88B0 A745 F31B EA0F 7C07 AE16 874D 539C ___ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
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CFP: PADL'03
[ - Paper submission deadline is July 31 - BEST PAPER AWARD: A best paper award ($500) will be given to the paper judged most innovative and practical. - PADL'03 proceedings will be published as Springer Verlag LNCS, past proceedings can be found in LNCS 1551, 1753 and 1990, and 2257 ] CALL FOR PAPERS!!! Fifth International Symposium on Practical Aspects of Declarative Languages 2003 (PADL '03) http://www.research.avayalabs.com/user/wadler/padl03/ New Orleans, Louisiana, USA Jan 13-14, 2003 Co-located with POPL 2003 Nothing is so practical as a good theory. Declarative languages build on sound theoretical bases to provide attractive frameworks for application development. Declarative approaches to programming include those based on logic, constraints, functions, and concurrency. Declarative languages have been successfully applied to a wide variety of real-world situations, ranging from database management to active networks to software engineering to decision support systems. New developments in theory and implementation have opened up new application areas. At the same time, applications of declarative languages to novel problems raise research issues. Questions include designing for scalability, language extensions for application deployment, and programming environments. Thus, applications drive the progress in the theory and implementation of declarative systems, and benefit from this progress as well. PADL provides a forum for researchers, practitioners, and implementors of declarative languages to exchange ideas on application areas and on the requirements for effective deployment of declarative systems. We invite papers dealing with practical applications of logic, constraint, functional, and concurrent programming. The scope of PADL includes, but is not limited to: o Innovative applications of declarative languages o Declarative domain-specific languages and applications o New developments in declarative languages and their impact on applications o Practical experiences o Novel uses of declarative languages in the classroom o Evaluation of implementation techniques on practical applications o Application letters (Applets) - see below o Declarative pearls - see below Papers should highlight the practical contribution of the work and the relevance of declarative languages to achieve that end. PADL 2003 will co-locate with ACM POPL 2003, in New Orleans. Application Letters (Applets) Real-world users of declarative languages may be so fully occupied writing declarative programs that they lack the time to write a full paper describing their work. Conference attendees often hear only from those developing declarative languages --- the users are too busy using them. In order to attract greater participation from users, the conference solicits application letters describing experience using declarative languages to solve real-world problems. Such papers might be half the length of a full paper (though any length up to a full paper is fine), and may be judged by interest of the application and novel use of declarative languages as opposed to a crisp new research result. Declarative Pearls Program committees traditionally expect a paper to make a contribution of a certain size. Ideas that are small, rounded, and glow with their own light may have a number of venues, but conferences are not typically among them. (Among the outlets have been columns such as Bentley's Programming Pearls in Communications of the ACM, Rem's Small Programming Exercises in Science of Computer Programming, and Barendregt's Theoretical Pearls and Bird's Functional Pearls in the Journal of Functional Programming.) The conference invites papers that develop a short declarative program. Such papers might be half the length of a full paper (though any length up to a full paper is fine), and may be judged by elegance of development and clarity of expression as opposed to a crisp new research result. Most Practical Paper Award The paper deemed most practical by the programm committee will be awarded a cash prize of US$500. Criteria for judging include practicality, innovation, quality of the work, and clarity of presentation. All submitted papers will automatically be candidates for this award. The program committee may choose not to make an award; or may make multiple awards, in which case the award money will be equally divided. Important Dates: o Paper Submission: Jul. 31, 2002 o Notification: Oct. 2, 2002 o Camera Ready: Nov. 6, 2002 o
Job Advertisment
The ARM Web site is advertising a Principal Research Engineer position; see http://www.arm.com/hr.nsf/iwpList61/90A8BD2585A0CE2F80256BF10051000F?OpenDocumentstyle=HR_UK and the summary attached to the end of this mail message. Note that although the job is for a Principal Research Engineer with a strong emphasis on microprocessor architecture, a high degree of proficiency in programming, preferably Haskell and C, is regarded as essential. Chris Dornan Principal Research Engineer ARM RD [EMAIL PROTECTED]+44 (0)1223 400498 Principal Research Engineer, Cambridge Reference: 02MKRD003 The Research and Development Division are seeking a highly motivated individual who has research experience and who's interests lie in the fields of computer languages, microprocessor architecture, and/or microprocessor simulation. The successful candidate will be involved in a team developing next generation microprocessor architectures. As well as architecture development, this role will involve developing, implementing, and integrating a range of sophisticated tools to assist in the analysis of microprocessor architectures and implementations. The successful candidate will be working in an environment which allows experimentation and provides autonomy, but expects innovation and results; hence the candidate will be of a very high caliber. This post would suit a PhD graduate or someone with a background working in research in Industry. Skills Essential * A high degree of proficiency in programming (preferably in Haskell C). * A good understanding of microprocessor architectures. * A working understanding of computer languages. * A background in Research and innovation. ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: what's the difference?
Cagdas Ozgenc wrote: Greetings. What is the difference between the following two scenarios: 1) class Eq a where (==) :: a - a - Bool class Eq a = Ord a where ( ) :: a - a - Bool Here you are doing subtyping. A variable of type Ord can be substitued for variable of type Eq. (==) belongs to Ord interface. 2) class Eq a where (==) :: a - a - Bool class Ord a where (eq),( ) :: a - a - Bool instance Ord a = Eq a where (==) = eq Here Ord is not a subtype of Eq. Even (eq) and (==) have the same definition, (==) is not part of Ord's interface. You are doing delegation. For those instances of Eq who happens to implement Ord interface, delegate (==) to (eq). The second case is similar to private inheritance in C++. You are overiding the virtual (==) of base class (Eq) in the derived class (Ord), but (==) is not part of derived class' interface. eq is just a rename for == to avoid the nameclash The second scenario resembles Russell's Paradox. Typeclass of a typeclass. Anyhow we are loosing orthogonality here. Thanks ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
