From 72ff908eaffd3dcab63a69f898673d96c2a9226b Mon Sep 17 00:00:00 2001
From: Jeremy Evans <code@jeremyevans.net>
Date: Fri, 1 Jun 2018 13:45:09 -0700
Subject: [PATCH] Initialize condattr_monotonic via pthread_condattr_init

Some operating systems will work without calling
pthread_condattr_init, but some won't (such as OpenBSD). Prior
to r63238, pthread_condattr_init was always called before
calling pthread_condattr_setclock.
---
 thread_pthread.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/thread_pthread.c b/thread_pthread.c
index e17ca36819..069c50ed7a 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -399,7 +399,10 @@ Init_native_thread(rb_thread_t *th)
 {
 #if defined(HAVE_PTHREAD_CONDATTR_SETCLOCK)
     if (condattr_monotonic) {
-        int r = pthread_condattr_setclock(condattr_monotonic, CLOCK_MONOTONIC);
+        int r = pthread_condattr_init(condattr_monotonic);
+        if (r == 0) {
+            r = pthread_condattr_setclock(condattr_monotonic, CLOCK_MONOTONIC);
+        }
         if (r) condattr_monotonic = NULL;
     }
 #endif
-- 
2.16.2