diff -Nru oops-1.5.23.orig/src/lib/rwlock/rwlock.c oops-1.5.23/src/lib/rwlock/rwlock.c
--- oops-1.5.23.orig/src/lib/rwlock/rwlock.c	2000-11-29 19:03:35.000000000 +0200
+++ oops-1.5.23/src/lib/rwlock/rwlock.c	2006-09-06 00:30:36.000000000 +0300
@@ -53,6 +53,8 @@
 #include <pthread.h>
 #include "rwlock.h"
 
+#if defined(OOPS_IMPLEMENT_RWLOCK)
+
 /* maximum number of times a read lock may be obtained */
 #define	MAX_READ_LOCKS		(INT_MAX - 1)
 
@@ -375,4 +377,6 @@
 	return(0);
 }
 
+#endif /* defined(OOPS_IMPLEMENT_RWLOCK) */
+
 #endif /* _THREAD_SAFE || _PTHREADS || _REENTRANT */
diff -Nru oops-1.5.23.orig/src/lib/rwlock/rwlock.h oops-1.5.23/src/lib/rwlock/rwlock.h
--- oops-1.5.23.orig/src/lib/rwlock/rwlock.h	2003-10-06 17:15:40.000000000 +0300
+++ oops-1.5.23/src/lib/rwlock/rwlock.h	2006-09-06 00:29:46.000000000 +0300
@@ -53,6 +53,7 @@
 
 #if	!defined(PTHREAD_RWLOCK_INITIALIZER)
 #define	PTHREAD_RWLOCK_INITIALIZER	NULL
+#define OOPS_IMPLEMENT_RWLOCK 1
 
 struct	pthread_rwlock {
 	pthread_mutex_t	lock;		/* monitor lock */