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____
__ __
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