diff --git a/include/gcc/ck_pr.h b/include/gcc/ck_pr.h
index 505153d..aa92eb4 100644
--- a/include/gcc/ck_pr.h
+++ b/include/gcc/ck_pr.h
@@ -31,9 +31,20 @@
 #error Do not include this file directly, use ck_pr.h
 #endif
 
+#include <ck_cc.h>
+
+CK_CC_INLINE 
+static void ck_pr_barrier(void)
+{
+
+	__asm__ __volatile__("" ::: "memory");
+	return;
+}
+
+#ifndef CK_F_PR
+#define CK_F_PR
 #include <stdbool.h>
 #include <ck_stdint.h>
-#include <ck_cc.h>
 
 /*
  * The following represent supported atomic operations.
@@ -110,28 +121,20 @@ ck_pr_fence_load_depends(void)
 #define CK_PR_FENCE(T)					\
 	CK_CC_INLINE static void			\
 	ck_pr_fence_strict_##T(void)			\
-	{						\
-		__sync_synchronize();			\
-	}						\
-	CK_CC_INLINE static void ck_pr_fence_##T(void)	\
 	{						\
 		__sync_synchronize();			\
 	}
 
 CK_PR_FENCE(load)
+CK_PR_FENCE(load_load)
+CK_PR_FENCE(load_store)
 CK_PR_FENCE(store)
+CK_PR_FENCE(store_store)
+CK_PR_FENCE(store_load)
 CK_PR_FENCE(memory)
 
 #undef CK_PR_FENCE
 
-CK_CC_INLINE static void
-ck_pr_barrier(void)
-{
-
-	__asm__ __volatile__("" ::: "memory");
-	return;
-}
-
 /*
  * Atomic compare and swap.
  */
@@ -275,5 +278,5 @@ CK_PR_UNARY_S(8, uint8_t)
 
 #undef CK_PR_UNARY_S
 #undef CK_PR_UNARY
-
+#endif /* !CK_F_PR */
 #endif /* _CK_PR_GCC_H */
diff --git a/include/gcc/ppc/ck_pr.h b/include/gcc/ppc/ck_pr.h
index 8b14772..1c53171 100644
--- a/include/gcc/ppc/ck_pr.h
+++ b/include/gcc/ppc/ck_pr.h
@@ -41,6 +41,11 @@
  */
 #include "ck_f_pr.h"
 
+/*
+ * Minimum interface requirement met.
+ */
+#define CK_F_PR
+
 /*
  * This bounces the hardware thread from low to medium
  * priority. I am unsure of the benefits of this approach
diff --git a/include/gcc/ppc64/ck_pr.h b/include/gcc/ppc64/ck_pr.h
index aebd2c9..a99e89c 100644
--- a/include/gcc/ppc64/ck_pr.h
+++ b/include/gcc/ppc64/ck_pr.h
@@ -40,6 +40,11 @@
  */
 #include "ck_f_pr.h"
 
+/*
+ * Minimum interface requirement met.
+ */
+#define CK_F_PR
+
 /*
  * This bounces the hardware thread from low to medium
  * priority. I am unsure of the benefits of this approach
diff --git a/include/gcc/sparcv9/ck_pr.h b/include/gcc/sparcv9/ck_pr.h
index fe6991a..ac2d243 100644
--- a/include/gcc/sparcv9/ck_pr.h
+++ b/include/gcc/sparcv9/ck_pr.h
@@ -40,6 +40,11 @@
  */
 #include "ck_f_pr.h"
 
+/*
+ * Minimum interface requirement met.
+ */
+#define CK_F_PR
+
 /*
  * Order loads at the least.
  */