diff --git a/lib/compiler.h b/lib/compiler.h
index bbfe01b569..e805eb8be4 100644
--- a/lib/compiler.h
+++ b/lib/compiler.h
@@ -123,15 +123,6 @@ extern "C" {
 #define assume(x)
 #endif
 
-/* pure = function does not modify memory & return value is the same if
- * memory hasn't changed (=> allows compiler to optimize)
- *
- * Mostly autodetected by the compiler if function body is available (i.e.
- * static inline functions in headers).  Since that implies it should only be
- * used in headers for non-inline functions, the "extern" is included here.
- */
-#define ext_pure	extern __attribute__((pure))
-
 /* for helper functions defined inside macros */
 #define macro_inline	static inline __attribute__((unused))
 #define macro_pure	static inline __attribute__((unused, pure))
diff --git a/lib/table.h b/lib/table.h
index 7e383dce80..5dec69ee7e 100644
--- a/lib/table.h
+++ b/lib/table.h
@@ -197,29 +197,25 @@ static inline void route_table_set_info(struct route_table *table, void *d)
 	table->info = d;
 }
 
-/* ext_pure => extern __attribute__((pure))
- *   does not modify memory (but depends on mem), allows compiler to optimize
- */
-
 extern void route_table_finish(struct route_table *table);
-ext_pure struct route_node *route_top(struct route_table *table);
-ext_pure struct route_node *route_next(struct route_node *node);
-ext_pure struct route_node *route_next_until(struct route_node *node,
-					     const struct route_node *limit);
+extern struct route_node *route_top(struct route_table *table);
+extern struct route_node *route_next(struct route_node *node);
+extern struct route_node *route_next_until(struct route_node *node,
+					   const struct route_node *limit);
 extern struct route_node *route_node_get(struct route_table *table,
 					 union prefixconstptr pu);
-ext_pure struct route_node *route_node_lookup(struct route_table *table,
-					      union prefixconstptr pu);
-ext_pure struct route_node *route_node_lookup_maynull(struct route_table *table,
-						      union prefixconstptr pu);
-ext_pure struct route_node *route_node_match(struct route_table *table,
-					     union prefixconstptr pu);
-ext_pure struct route_node *route_node_match_ipv4(struct route_table *table,
-						  const struct in_addr *addr);
-ext_pure struct route_node *route_node_match_ipv6(struct route_table *table,
-						  const struct in6_addr *addr);
+extern struct route_node *route_node_lookup(struct route_table *table,
+					    union prefixconstptr pu);
+extern struct route_node *route_node_lookup_maynull(struct route_table *table,
+						    union prefixconstptr pu);
+extern struct route_node *route_node_match(struct route_table *table,
+					   union prefixconstptr pu);
+extern struct route_node *route_node_match_ipv4(struct route_table *table,
+						const struct in_addr *addr);
+extern struct route_node *route_node_match_ipv6(struct route_table *table,
+						const struct in6_addr *addr);
 
-ext_pure unsigned long route_table_count(struct route_table *table);
+extern unsigned long route_table_count(struct route_table *table);
 
 extern struct route_node *route_node_create(route_table_delegate_t *delegate,
 					    struct route_table *table);
@@ -228,10 +224,10 @@ extern void route_node_destroy(route_table_delegate_t *delegate,
 			       struct route_table *table,
 			       struct route_node *node);
 
-ext_pure struct route_node *route_table_get_next(struct route_table *table,
-						 union prefixconstptr pu);
-ext_pure int route_table_prefix_iter_cmp(const struct prefix *p1,
-					 const struct prefix *p2);
+extern struct route_node *route_table_get_next(struct route_table *table,
+					       union prefixconstptr pu);
+extern int route_table_prefix_iter_cmp(const struct prefix *p1,
+				       const struct prefix *p2);
 
 /*
  * Iterator functions.