--- a/targets/Xenomai/plc_Xenomai_main.c	Fri Feb 27 00:40:44 2015 +0100
+++ b/targets/Xenomai/plc_Xenomai_main.c	Fri Mar 13 17:19:58 2015 +0100
@@ -363,23 +363,3 @@
     }    /* as plc does not wait for lock. */
 }
 
-int CheckRetainBuffer(void)
-{
-	return 1;
-}
-
-void ValidateRetainBuffer(void)
-{
-}
-
-void InValidateRetainBuffer(void)
-{
-}
-
-void Retain(unsigned int offset, unsigned int count, void *p)
-{
-}
-
-void Remind(unsigned int offset, unsigned int count, void *p)
-{
-}