[ruby-core:77482] [Ruby trunk Bug#12808] Ruby builds do not produce Process::UPTIME constant on macOS Sierra

From: iamasmith.home@...
Date: 2016-10-04 14:15:56 UTC
List: ruby-core #77482
Issue #12808 has been reported by Andrew Smith.

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Bug #12808: Ruby builds do not produce Process::UPTIME constant on macOS Sierra
https://bugs.ruby-lang.org/issues/12808

* Author: Andrew Smith
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.1.9p490 (2016-03-30 revision 54437) [x86_64-darwin16]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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Due to the fact that macOS Sierra does not define CLOCK_UPTIME in /usr/include/time.h the UPTIME constant is never generated during the Ruby build.

macOS defines CLOCK_UPTIME_RAW instead as..

clock that increments monotonically, in the same manner as CLOCK_MONOTONIC_RAW, but that does not increment while the system is asleep.  The returned value
is identical to the result of mach_absolute_time() after the appropriate mach_timebase conversion is applied.

It appears this is done to provide a selection for uptime value based on sleeping or non sleeping return value.





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