7.10.3 fails to build with Xcode 7.3

[George Colpitts]

Sorry I see that Manuel mentioned the problem with 8.0.1 rc2 alreadyin his
first email about this

On Wed, Apr 13, 2016 at 2:43 PM George Colpitts <george.colpitts at gmail.com>
wrote:

> It turns out, not surprisingly, that this also breaks ghc 8, but in a
> totally different way, see
> https://ghc.haskell.org/trac/ghc/ticket/11823#comment:13
>
>
>
> On Sat, Mar 26, 2016 at 6:35 AM Manuel M T Chakravarty <
> chak at justtesting.org> wrote:
>
>> I just noticed that GHC 7.10.3 (latest release version) fails to build
>> with version 7.3 of Xcode (which just came out of beta). Maybe this is due
>> to
>>
>>   https://ghc.haskell.org/trac/ghc/ticket/11744
>>
>> The problem manifests in the form of a SEGV when dll-split is invoked for
>> the first time — specifically lldb has the following to say,
>>
>> Process 17348 launched: '../lib/bin/dll-split' (x86_64)
>> Process 17348 stopped
>> * thread #1: tid = 0x4a821e, 0x0000000100e26357
>> libHSrts-ghc7.10.3.dylib`stg_returnToStackTop + 7, queue =
>> 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x1e)
>>     frame #0: 0x0000000100e26357
>> libHSrts-ghc7.10.3.dylib`stg_returnToStackTop + 7
>> libHSrts-ghc7.10.3.dylib`stg_returnToStackTop:
>> ->  0x100e26357 <+7>:  movq   0x1e(%rax), %rbx
>>     0x100e2635b <+11>: movq   0x10(%rbx), %rbp
>>     0x100e2635f <+15>: leaq   0x126(%rbx), %r15
>>     0x100e26366 <+22>: movq   $0x0, 0x904(%r13)
>>
>> Interestingly, the GHC 8.0.1-rc2 build does not exhibit that same
>> failure. It does, however, fail to build due to an undefined symbol:
>>
>> Undefined symbols for architecture x86_64:
>>   "_stg_sel_18_upd_info", referenced from:
>>       _sc9J_info in Monad.dyn_o
>> ld: symbol(s) not found for architecture x86_64
>> clang: error: linker command failed with exit code 1 (use -v to see
>> invocation)
>> `gcc' failed in phase `Linker'. (Exit code: 1)
>> make[1]: *** [ghc/stage2/build/tmp/ghc-stage2] Error 1
>> make: *** [all] Error 2
>>
>> (This may be unrelated to Xcode 7.3 and a known problem on OS X with that
>> RC. I didn’t follow the 8.0.1-rc2 tickets in detail.)
>>
>> As I assume that there will be no further 7.10 release, I am posting this
>> here just to save others the time to track the problem down.
>>
>> Manuel
>>
>> PS: I wish I had the time to check GHC builds with Xcode beta releases,
>> but alas, I usually don’t.
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>>
>
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