_POSIX_CLOCK_SELECTION

[David Schultz]

On Sat, Nov 12, 2011, Oliver Heesakkers wrote:
> After submitting a little patch for VLC I found out that the upcoming 1.2 
> release will use, or rather require, _POSIX_CLOCK_SELECTION to be defined > 1.
> 
> >From what little that I understand from C, the fact that 
> /usr/include/sys/unistd.h declares _POSIX_CLOCK_SELECTION to be -1 means that 
> it has not been implemented. Am I correct?
> 
> At least it means VLC 1.2 will (currently) fail to build:
> http://git.videolan.org/?p=vlc.git;a=blob;f=src/posix/thread.c;h=8e94ead26537eb398c3555288877eb0d2d70e28d;hb=HEAD#l460
> 
> Am I correct in concluding that FreeBSD is late in implementing 
> _POSIX_CLOCK_SELECTION (required since 2008), or is there another other way, 
> that I'm currently not seeing, to satisfy VLC 1.2 in it's requirement?

As far as I can tell, the clock selection option is fully
supported, and only the macro is wrong.  I'm CCing some of the
people who work on libthr for verification.