ANNOUNCE: GHC version 6.12.1
berthold at Mathematik.Uni-Marburg.de
Mon Dec 14 14:04:02 EST 2009
to use Control.Parallel, you need to download and install two packages,
deepseq and parallel, from hackage.haskell.org.
Most likely this will work with cabal, or you just download the two
The reason is, when packaging "parallel", this package has been removed
from the GHC core libraries. BTW I am unsure whether this is at all
clever, since it needs specific GHC support (at least for now - am I
In addition, be informed that Control.Parallel.Strategies has been
heavily restructured just last month (splitting it into deepseq and
parallel is one of the changes, but not the most fundamental).
If you want to try examples from GpH publications, you will certainly
have some problems. parallel-1.x versions containing the original
definitions are on hackage as well and should work for experiments.
PS: Loading Control.Parallel into ghci is a handy debugging procedure
for the sequential parts of your program without any hassle, but if you
do not compile and link your program, it will not use any parallelism
(and run slow anyway).
> From: Luca Ciciriello <luca_ciciriello at hotmail.com>
> Subject: RE: ANNOUNCE: GHC version 6.12.1
> To: <marco-oweber at gmx.de>, <glasgow-haskell-users at haskell.org>
> Message-ID: <SNT128-W3217F8C02C7EAA2723E4339A890 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
> Installed 6.12.1 on MacOS X 10.6Now I'm unable to load in GHCi of that
> modules containing "import Control.Parallel"I'm missing something?
>> From: marco-oweber at gmx.de
>> To: glasgow-haskell-users at haskell.org
>> Date: Mon, 14 Dec 2009 15:24:48 +0100
>> Subject: RE: ANNOUNCE: GHC version 6.12.1
>> Excerpts from Luca Ciciriello's message of Mon Dec 14 15:12:45 +0100
>> > I've the 6.10.4 version installed on my MacOS X 10.6 OS. Have I to
>> > this version of GHC before installing the Mac .pkg for the 6.12.1?
>> Hi Luca,
>> You should be able to get some hints by looking at where ghc is
>> By default ghc puts its libraries into directory which contains the ghc
>> release name. So libs can be installed at the same time.
>> There are also ghc(i)-pkg-$GHC_VERSION executables.
>> So it should be possible. However I don't know about Mac details.
>> But maybe someone else can give you a more accurate answer.
>> Marc Weber
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