Index: generic/nsfInt.h
===================================================================
diff -u -rd9344280c05990c0254aa652a08a09da3e5822b1 -r76bdfab614f658464ee9e020d0275868cdd61026
--- generic/nsfInt.h	(.../nsfInt.h)	(revision d9344280c05990c0254aa652a08a09da3e5822b1)
+++ generic/nsfInt.h	(.../nsfInt.h)	(revision 76bdfab614f658464ee9e020d0275868cdd61026)
@@ -76,6 +76,12 @@
 #  define likely(x) (x)
 #endif
 
+#if __GNUC_PREREQ(2, 96)
+# define pure __attribute__((pure))
+#else
+# define pure
+#endif
+
 #if __GNUC_PREREQ(3, 3)
 # define nonnull(ARGS) __attribute__((__nonnull__(ARGS)))
 #else
@@ -88,6 +94,12 @@
 # define returns_nonnull
 #endif
 
+#if __GNUC_PREREQ(4, 9)
+# define returns_nonnull __attribute__((returns_nonnull))
+#else
+# define returns_nonnull
+#endif
+
 /*
  * Tries to use gcc __attribute__ unused and mangles the name, so the
  * attribute could not be used, if declared as unused.