--- DES.xs.orig	2020-11-26 16:40:18.000000000 -0800
+++ DES.xs	2020-11-26 16:41:18.000000000 -0800
@@ -24,6 +24,8 @@
 MODULE = Crypt::DES		PACKAGE = Crypt::DES		PREFIX = _des_
 PROTOTYPES: DISABLE
 
+#pragma clang diagnostic ignored "-Wimplicit-function-declaration"
+
 char *
 _des_expand_key(key)
 	char *	key = NO_INIT