* thread_pthread.c (thread_timer): call prctl(PR_SET_NAME) only if

PR_SET_NAME is available.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Thu Dec  1 23:21:58 2011  CHIKANAGA Tomoyuki  <nagachika00@gmail.com>
+
+	* thread_pthread.c (thread_timer): call prctl(PR_SET_NAME) only if
+	  PR_SET_NAME is available.
+
 Thu Dec  1 22:31:16 2011  Tanaka Akira  <akr@fsij.org>
 
 	* io.c (linux_get_maxfd): change local variable name.

thread_pthread.c

@@ -1130,7 +1130,7 @@ thread_timer(void *p)
 
     if (TT_DEBUG) WRITE_CONST(2, "start timer thread\n");
 
-#ifdef __linux__
+#if defined(__linux__) && defined(PR_SET_NAME)
     prctl(PR_SET_NAME, "ruby-timer-thr");
 #endif