+/*
+ * Suppress the argument to __malloc__ in Clang (not supported in at least
+ * version 13) and GCC versions prior to 11.
+ */
+#if !defined(__attribute__) && !defined(__malloc__)
+# if defined(__clang__) || __GNUC__ < 11
+# define __malloc__(dalloc) __malloc__
+# endif
+#endif
+