To elaborate, in the past, I had a lot of problems using libraries from the ghci prompt on the Mac but I haven't tried recently.
As an example, on the web page<http://www.cs.yale.edu/homes/hudak/SOE/software1.htm>for the book the Haskell School of Expression it says: Note for OS X users: running graphics applications from GHCi is no longer supported. Instead, one has to compile a graphics program using GHC in order to run it (see example/GMIExamples.lhs for an example). I had similar problems using the Yale Euterpea music program from ghci. When I inquired I was referred to https://ghc.haskell.org/trac/ghc/ticket/4244 and https://ghc.haskell.org/trac/ghc/ticket/781. I see that the latter is now scheduled for 7.10.1 On Wed, Apr 30, 2014 at 1:45 PM, Simon Marlow <marlo...@gmail.com> wrote: > On 30/04/2014 01:35, George Colpitts wrote: > >> It doesn't have anything about the dynamic linking changes made for 7.8. >> I think it's worth mentioning the improvements we expect to get from >> that. The highlights of the release notes do mention it, so maybe that >> suffices. >> >> In particular, I'm hoping that it is going to fix a lot of problems with >> using foreign libraries such as OpenGL from ghci. I could be wrong about >> that though. >> > > I'd like to understand more about what those problems are. As a data > point, at Facebook we're using static linking (I compiled GHC with > DYNAMIC_GHC_PROGRAMS=NO), we're loading upwards of 50 3rd-party C++ > libraries and one gigantic shared library consisting of a ton of in-house > C++ code, together with all our Haskell code into GHCi, and it works > perfectly. The key to using the static linker is to not use it for C++ > code - you want all your external C++ code in shared libraries and load > those using the system linker. > > Dynamic linking has been a huge headache in GHC, and it's not clear that > it's an overall improvement compared with the static linker. Now that 7.8 > is out of the way, it's time to have a conversation about whether we want > to do dynamic linking again for 7.10, or revert to static linking. I think > Austin is going to update https://ghc.haskell.org/trac/ > ghc/wiki/DynamicGhcPrograms, and then we'll see where we stand. > > Cheers, > Simon > > > > >> On Tue, Apr 29, 2014 at 6:13 PM, Simon Peyton Jones >> <simo...@microsoft.com <mailto:simo...@microsoft.com>> wrote: >> >> As Austin has told us, there’s a draft of the *GHC Status Report for >> the HCAR*, here:____ >> >> https://ghc.haskell.org/trac/ghc/wiki/Status/May14____ >> >> >> Have we missed out something you have been working hard on? Do >> take a moment to add a bullet in an appropriate place (it’s a >> wiki). I’d like to be sure that we are giving credit to all the >> appropriate people, so please help us fix that too. GHC is a team >> effort.____ >> >> Deadline is 1 May I think.____ >> >> Thanks____ >> >> Simon____ >> >> __ __ >> >> >> _______________________________________________ >> ghc-devs mailing list >> ghc-devs@haskell.org <mailto:ghc-devs@haskell.org> >> http://www.haskell.org/mailman/listinfo/ghc-devs >> >> >> >> >> >> _______________________________________________ >> ghc-devs mailing list >> ghc-devs@haskell.org >> http://www.haskell.org/mailman/listinfo/ghc-devs >> >>
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