Another cool direction 7.8 will allow is using the various llvm ffi bindings from ghci!

On Wednesday, October 2, 2013, Paul Liu wrote:

Thanks. I've just built GHC HEAD on Mac OS X Lion, and tested by
installing libraries with --enable-shared and loading a GLFW program
into GHCi. Using ghci -fno-ghci-sandbox, everything works great
including closing and restarting GL window multiple times. Can't wait
for the official release of GHC 7.8!

On Tue, Oct 1, 2013 at 12:09 PM, Carter Schonwald
<carter.schonwald@gmail.com> wrote:
> thats the linker bug.
>
> the glfw stuff has been tested on ghc HEAD / 7.7 by folks on #haskell-game
> in recent memory. GHCI + foreign libs should work fine now (modulo thread
> local storage related thing).
>
> the historical element doesn't matter any more.
>
> To the best of my knowledge, all such issues should be gone. Anyone who
> cares about making sure GHCI+ gui libs play nice, PLEASE test with HEAD.
>
> the better this issue is properly tested (which i believe it has been), the
> more we can actually prevent it from happening. This requires people to test
> with HEAD GHCi now, rather than doing archaeology.
>
> anyone who cares, please play with GHCI in HEAD. If your lib doesn't work
> with ghci, please report a bug. It would be a new bug because it wont' be
> the previous reasons it hasnt' worked.
>
>
> tl;dr to the best of my knowledge this issue is resolved in HEAD. Test HEAD.
> Help us make sure it stays resolved by testing HEAD.
>
> thanks
> -Carter
>
>
>
>
> On Tue, Oct 1, 2013 at 1:20 PM, Paul Liu <ninegua@gmail.com> wrote:
>>
>> I reported a problem with statically linked GLFW library on Mac OS X
>> Lion in this thread:
>>
>> http://www.haskell.org/pipermail/haskell-cafe/2012-January/097355.html
>>
>> I do not know why this is broken on Mac OS X Lion, but not on Linux or
>> Windows. There was an EnableGUI hack for GHC 7.2 (and previous
>> versions) and OS X version before Lion, but it no longer works. So I'm
>> not sure if it is OS X Lion, or GLFW, or GHC, or a combination of them
>> that caused this problem.
>>
>> Regards,
>> Paul Liu
>>
>> On Tue, Oct 1, 2013 at 7:04 AM, Carter Schonwald
>> <carter.schonwald@gmail.com> wrote:
>> > Hey simon, the two issues that have recurrently bit ghci interaction
>> > with
>> > foreign GUI libs are
>> > 1) the ghci linker. This is fixed in head by now having ghci use the
>> > system
>> > linker
>> > 2) some GUI libs require thread local state, and ghci has a flag for
>> > that
>> > 3) I'm not aware of anyone reporting newly broken libs wrt GUI bindings
>> > when 7.6 rolled out. The only fix that's relevant to 7.8 is the
>> > dylinker
>> > bit, but that would have been a problem historically too.
>> >
>> > I believe a number of folks in #haskell-game have recently tested point
>> > one.
>> > (Though I should ask to double check)
>> >
>> > At the very least, I'm not aware of hearing of such a 7.6 specific ghci
>> > breakage before.
>> >
>> >
>> > On Tuesday, October 1, 2013, Simon Peyton-Jones wrote:
>> >>
>> >> Dear GHC devs
>> >>
>> >>
>> >>
>> >> See below (in red). I do not know the details of this, but it sounds
>> >> like
>> >> a pretty serious problem, and it used to work. Is whatever-it-is
>> >> confirmed
>> >> fixed in 7.8? Do we have a test that’ll trip if it breaks again? (I’m
>> >> guessing that the latter might be hard.)
>> >>
>> >>
>> >>
>> >> Thanks
>> >>
>> >>
>> >>
>> >> Simon
>> >>
>> >>
>> >>
>> >> -----Original Message-----
>> >> From: Haskell-Cafe [mailto:haskell-cafe-bounces@haskell.org] On Behalf
>> >> Of
>> >> Paul Liu
>> >> Sent: 30 September 2013 07:18
>> >> To: Conal Elliott
>> >> Cc: Haskell Cafe
>> >> Subject: Re: [Haskell-ca--
Regards,
Paul Liu