diff -bur mcpp-2.7.2.1-orig/config/config.sub mcpp-2.7.2.1/config/config.sub
--- mcpp-2.7.2.1-orig/config/config.sub	2025-04-05 21:16:05.372574100 -0600
+++ mcpp-2.7.2.1/config/config.sub	2025-04-05 21:19:12.961005800 -0600
@@ -366,7 +366,7 @@
 	| tron-* \
 	| v850-* | v850e-* | vax-* \
 	| we32k-* \
-	| x86-* | x86_64-* | xps100-* | xscale-* | xscalee[bl]-* \
+	| x86-* | x86_64-* | aarch64-* | xps100-* | xscale-* | xscalee[bl]-* \
 	| xstormy16-* | xtensa-* \
 	| ymp-* \
 	| z8k-*)