From 107dc2378aac8d4a56b2c1c7356124dee768f9af Mon Sep 17 00:00:00 2001
From: "bernard.xiong" <bernard.xiong@gmail.com>
Date: Thu, 10 Mar 2011 06:39:58 +0000
Subject: [PATCH] fix CLOCK_REALTIME definitions.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1324 bbd45198-f89e-11dd-88c7-29a3b14d5316
---
 components/pthreads/pthread.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/components/pthreads/pthread.h b/components/pthreads/pthread.h
index 30a1cbc4fd..58a1bb7423 100644
--- a/components/pthreads/pthread.h
+++ b/components/pthreads/pthread.h
@@ -262,7 +262,9 @@ struct sigevent {
 #define MICROSECOND_PER_TICK	(MICROSECOND_PER_SECOND / RT_TICK_PER_SECOND)
 #define NANOSECOND_PER_TICK		(NANOSECOND_PER_SECOND  / RT_TICK_PER_SECOND)
 
+#ifndef CLOCK_REALTIME
 #define CLOCK_REALTIME      0
+#endif
 
 int clock_getres  (clockid_t clockid, struct timespec *res);
 int clock_gettime (clockid_t clockid, struct timespec *tp);