macOS 10.12

[Manuel M T Chakravarty]

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

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>:
> 
> 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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