--- isl/config.sub.orig	2020-12-31 14:34:29.000000000 +0000
+++ isl/config.sub	2024-12-27 17:22:37.855989000 +0000
@@ -516,6 +517,12 @@
 		basic_machine=m68k-apollo
 		os=-bsd
 		;;
+	arm64)
+		basic_machine=aarch64-unknown
+		;;
+	arm64-*)
+		basic_machine=aarch64-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		;;
 	aros)
 		basic_machine=i386-pc
 		os=-aros