Hi Dan,

I suspect this is one for Jon/Kyle or others but looking through
kernel bits and patches it seems that these features are completely
agnostic to HW and in fact the patches [1] seem to have come from the
ARM community from Android Alarm Timers [2]. One thing I would check
is if on the particular platform being tested against has a RTC
registered. We build a few RTCs into the kernel and dozens of other
less common ones as modules.

Peter

[1] https://lkml.org/lkml/2011/4/19/553
[2] https://lwn.net/Articles/429925/

On Tue, Oct 15, 2013 at 7:26 AM, Dan Horák <[email protected]> wrote:
> forwarding a message from our Ruby maintainer asking for help
>
> looks like a kernel problem, please see also
> https://bugs.ruby-lang.org/issues/9008#note-3
>
>
>                 Dan
>
> -------- Původní zpráva --------
> Předmět:        Does clock_gettime support CLOCK_REALTIME_ALARM and
> CLOCK_BOOTTIME_ALARM?
> Datum:  Thu, 10 Oct 2013 13:48:01 +0200
> Od:     Vít Ondruch <[email protected]>
> Komu:   [email protected]
>
>
>
> Hi,
>
> I am trying to build Ruby 2.1 for F21 and I observe following test
> errors:
>
>    3) Error:
> TestProcess#test_clock_getres_constants:
> Errno::E524: Unknown error 524 - clock_getres
>      
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1752:in
> `clock_getres' 
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1752:in
> `block in
> test_clock_getres_constants' 
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1749:in
> `each' 
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1749:in
> `test_clock_getres_constants'
>    4) Error:
> TestProcess#test_clock_gettime_constants:
> Errno::E524: Unknown error 524 - clock_gettime
>      
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1676:in
> `clock_gettime' 
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1676:in
> `block in
> test_clock_gettime_constants' 
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1673:in
> `each' 
> /builddir/build/BUILD/ruby-2.1.0-preview1/test/ruby/test_process.rb:1673:in
> `test_clock_gettime_constants'
>
>
> It looks like CLOCK_REALTIME_ALARM and CLOCK_BOOTTIME_ALARM are not
> supported, but the error code is completely strange to me. According to
> the documentation, it should return EINVAL.
>
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html
>   |
>   | [EINVAL]
>   | The clock_id argument does not specify a known clock.
>
> Any help is appreciated.
>
> Thanks
>
>
>
> Vít
>
>
>
>
> P.S. This is my upstream report: http://bugs.ruby-lang.org/issues/9008
> P.S.2 I am not subscribed to this list, please keep me in the CC.
>
>
>
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