Where has Control.Concurrent.STM gone? I cannot find it on http://www.haskell.org/ghc/docs/latest/html/libraries/ anymore!
I hope that is not what you meant by "Considerably improved support for parallel execution" ;-) /Dennis On Mon, Dec 14, 2009 at 2:36 PM, Ian Lynagh <[email protected]> wrote: > > ============================================================== > The (Interactive) Glasgow Haskell Compiler -- version 6.12.1 > ============================================================== > > The GHC Team is pleased to announce a new major release of GHC. There > have been a number of significant changes since the last major release, > including: > > * Considerably improved support for parallel execution. GHC 6.10 would > execute parallel Haskell programs, but performance was often not very > good. Simon Marlow has done lots of performance tuning in 6.12, > removing many of the accidental (and largely invisible) gotchas that > made parallel programs run slowly. > > * As part of this parallel-performance tuning, Satnam Singh and Simon > Marlow have developed ThreadScope, a GUI that lets you see what is > going on inside your parallel program. It's a huge step forward from > "It takes 4 seconds with 1 processor, and 3 seconds with 8 processors; > now what?". ThreadScope will be released separately from GHC, but at > more or less the same time as GHC 6.12. > > * Dynamic linking is now supported on Linux, and support for other > platforms will follow. Thanks for this most recently go to the > Industrial Haskell Group who pushed it into a fully-working state; > dynamic linking is the culmination of the work of several people over > recent years. One effect of dynamic linking is that binaries shrink > dramatically, because the run-time system and libraries are shared. > Perhaps more importantly, it is possible to make dynamic plugins from > Haskell code that can be used from other applications. > > * The I/O libraries are now Unicode-aware, so your Haskell programs > should now handle text files containing non-ascii characters, without > special effort. > > * The package system has been made more robust, by associating each > installed package with a unique identifier based on its exposed ABI. > Now, cases where the user re-installs a package without recompiling > packages that depend on it will be detected, and the packages with > broken dependencies will be disabled. Previously, this would lead to > obscure compilation errors, or worse, segfaulting programs. > > This change involved a lot of internal restructuring, but it paves the > way for future improvements to the way packages are handled. For > instance, in the future we expect to track profiled packages > independently of non-profiled ones, and we hope to make it possible to > upgrade a package in an ABI-compatible way, without recompiling the > packages that depend on it. This latter facility will be especially > important as we move towards using more shared libraries. > > * There are a variety of small language changes, including > * Some improvements to data types: record punning, declaring > constructors with class constraints, GADT syntax for type families > etc. > * You can omit the "$" in a top-level Template Haskell splice, which > makes the TH call look more like an ordinary top-level declaration > with a new keyword. > * We're are deprecating mdo for recursive do-notation, in favour of > the more expressive rec statement. > * We've concluded that the implementation of impredicative polymorphism > is unsustainably complicated, so we are re-trenching. It'll be > deprecated in 6.12 (but will still work), and will be either removed > or replaced with something simpler in 6.14. > > > The full release notes are here: > > http://haskell.org/ghc/docs/6.12.1/html/users_guide/release-6-12-1.html > > How to get it > ~~~~~~~~~~~~~ > > The easy way is to go to the web page, which should be self-explanatory: > > http://www.haskell.org/ghc/ > > We supply binary builds in the native package format for many > platforms, and the source distribution is available from the same > place. > > Packages will appear as they are built - if the package for your > system isn't available yet, please try again later. > > > Background > ~~~~~~~~~~ > > Haskell is a standard lazy functional programming language; the > current language version is Haskell 98, agreed in December 1998 and > revised December 2002. > > 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/ > GHC developers' home page http://hackage.haskell.org/trac/ghc/ > Haskell home page http://www.haskell.org/ > > > Supported Platforms > ~~~~~~~~~~~~~~~~~~~ > > The list of platforms we support, and the people responsible for them, > is here: > > http://hackage.haskell.org/trac/ghc/wiki/Contributors > > Ports to other platforms are possible with varying degrees of > difficulty. The Building Guide describes how to go about porting to a > new platform: > > http://hackage.haskell.org/trac/ghc/wiki/Building > > > Developers > ~~~~~~~~~~ > > We welcome new contributors. Instructions on accessing our source > code repository, and getting started with hacking on GHC, are > available from the GHC's developer's site run by Trac: > > http://hackage.haskell.org/trac/ghc/ > > > 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/ > > Some GHC developers hang out on #haskell on IRC, too: > > http://www.haskell.org/haskellwiki/IRC_channel > > Please report bugs using our bug tracking system. Instructions on > reporting bugs can be found here: > > http://www.haskell.org/ghc/reportabug > > _______________________________________________ > Haskell mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell > _______________________________________________ Haskell mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell
