Index: share/mk/bsd.compiler.mk
===================================================================
--- share/mk/bsd.compiler.mk
+++ share/mk/bsd.compiler.mk
@@ -255,6 +255,15 @@
 ${X_}COMPILER_FEATURES+=	fileprefixmap
 .endif
 
+# Architecture specific features
+
+.if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 130000) || \
+	(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 90000)
+# AArch64 sha512 intrinsics are supported (and have been tested) in
+# clang 13 and gcc 9.
+${X_}COMPILER_FEATURES+=	aarch64-sha512
+.endif
+
 .else
 # Use CC's values
 X_COMPILER_TYPE=	${COMPILER_TYPE}