Re: thread_test's sched_yield requires -lrt on solaris

Oskari Saarenmaa wrote:
> I configured the dingo and binturong Solaris 10 animals to build 9.3
> some time ago but apparently they always failed the configure phase.
> Turns out this is caused by thread_test's usage of sched_yield which is
> in librt on Solaris but which is not pulled in by anything on 9.3 and
> earlier on my box.
> 
> Apparently the other Solaris animal (castoroides) requires librt for
> fdatasync, but that's not required on my system.  On 9.4 and master
> librt is required for shm_open so the check doesn't fail there.
> 
> Attached a patch to check for sched_yield in configure, the patch only
> applies against 9.0 - 9.3 which are using autoconf 2.63.  We should
> probably check for sched_yield anyway on all branches even if it's not
> strictly required on 9.4+ at the moment.

I'm going to apply this patch to all branches.  (I don't think it's so
cool to rely on librt being pulled in by unrelated functions.)

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
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