GHC status report

[George Colpitts]

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 <marlowsd at 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
>> <simonpj at microsoft.com <mailto:simonpj at 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____
>>
>>     __ __
>>
>>
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>>
>>
>>
>>
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