macOS 10.12

[Manuel M T Chakravarty]

BTW, here is an alternative fix (against 7.10.3) that uses the minimum deployment target to determine whether to use the new ’clock_gettime()’ on macOS to avoid the problem I mentioned in my previous message:

  https://github.com/mchakravarty/ghc/commit/da87a6551a528d51dfd4277c4468c57d5039ab59

(So far only tested by compiling against the macOS 10.12 SDK w/ Xcode 8 and running it on macOS 10.11.)

Manuel

> Manuel M T Chakravarty <chak at justtesting.org>:
> 
> Yes, it is exactly the issue Brandon references. Thanks.
> 
> I have got one concern with this fix, though: doesn’t that mean that a GHC *build* on macOS 10.12 will not run on earlier versions of macOS?
> 
> In the meantime, I found,
> 
>   https://github.com/Homebrew/homebrew-core/issues/1957#issuecomment-226328001 <https://github.com/Homebrew/homebrew-core/issues/1957#issuecomment-226328001>
> 
> which explains the issue. Now, when you compile on macOS 10.12 with this fix, GHC RTS will use ’clock_gettime’. However, that symbol is not available in the system libraries of earlier version of macOS, which will lead to a dyld failure when trying to run the executable.
> 
> In fact, given this is in the RTS, any Haskell program compiled with such as build of GHC would be unable to run on macOS versions older than 10.12 (unless I am mistaken). Has this been considered?
> 
> Manuel
> 
>> Brandon Allbery <allbery.b at gmail.com <mailto:allbery.b at gmail.com>>:
>> 
>> fwiw I suspect this is http://git.haskell.org/ghc.git/commit/a0f1809742160ca0c07778f91f3e2a8ea147c0a4 <http://git.haskell.org/ghc.git/commit/a0f1809742160ca0c07778f91f3e2a8ea147c0a4>
>> 
>> On Thu, Jul 28, 2016 at 5:13 PM, Carter Schonwald <carter.schonwald at gmail.com <mailto:carter.schonwald at gmail.com>> wrote:
>> Could you share your error messages ?
>> 
>> 
>> On Wednesday, July 27, 2016, Manuel M T Chakravarty <chak at justtesting.org <mailto:chak at justtesting.org>> wrote:
>> Has anybody tried compiling GHC with the (beta) macOS 10.12 Sierra SDK? I just gave it a shot trying to compile GHC 7.8.3 and ran into a problem with GetTime.c in the RTS. (I haven’t tried GHC 8.0.1.)
>> 
>> Manuel
>> 
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>> 
>> -- 
>> brandon s allbery kf8nh                               sine nomine associates
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