Bug 41786 - Mono is broken when building with the macOS 10.12 SDK
Summary: Mono is broken when building with the macOS 10.12 SDK
Alias: None
Product: Runtime
Classification: Mono
Component: General ()
Version: unspecified
Hardware: PC Mac OS
: --- critical
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2016-06-14 07:25 UTC by Rolf Bjarne Kvinge [MSFT]
Modified: 2016-06-22 10:30 UTC (History)
3 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Rolf Bjarne Kvinge [MSFT] 2016-06-14 07:25:45 UTC
This happens:

Dyld Error Message:
  Symbol not found: _clock_getres
  Referenced from: /work/*/mono
  Expected in: /usr/lib/libSystem.B.dylib

because apparently macOS 10.12 has implemented clock_getres now, and we enter this: https://github.com/mono/mono/blob/master/mono/utils/mono-time.c#L150, but that obviously doesn't execute on older OSXes.
Comment 2 Rolf Bjarne Kvinge [MSFT] 2016-06-14 14:15:47 UTC
This might be a bug in Apple's headers, which don't hide the symbol when targeting an earlier macOS: https://gist.github.com/rolfbjarne/b2160f954f8b6ab1debd7c1ec22e9851
Comment 3 Alexander Köplinger [MSFT] 2016-06-14 14:48:03 UTC
I sent a PR which should workaround this: https://github.com/mono/mono/pull/3165
Comment 4 Alexander Köplinger [MSFT] 2016-06-14 17:16:11 UTC
Committed to master and 4.5.1.

@Rolf: can you please file a radar with Apple so that they can fix this?