Stuff regarding the platform triplet.

Author: johnzhou721

configure

@@ -888,6 +888,26 @@ if test "$cross_compiling" = yes; then
 	*-*-cygwin*)
 		_host_ident=
 		;;
+	*-apple-ios*-macabi)
+		_host_os=`echo $host | cut -d '-' -f3`
+		_host_device=`echo $host | cut -d '-' -f4`   # should be macabi
+		_host_device=${_host_device:=os}
+
+		# IPHONEOS_DEPLOYMENT_TARGET is the minimum supported iOS version
+		AC_MSG_CHECKING([iOS deployment target])
+		IPHONEOS_DEPLOYMENT_TARGET=$(echo ${_host_os} | cut -c4-)
+		IPHONEOS_DEPLOYMENT_TARGET=${IPHONEOS_DEPLOYMENT_TARGET:=14.0}  # else it returns invalid version number
+		AC_MSG_RESULT([$IPHONEOS_DEPLOYMENT_TARGET])
+
+		case "$host_cpu" in
+			aarch64)
+				_host_ident=${IPHONEOS_DEPLOYMENT_TARGET}-arm64-iphoneos-${_host_device}   # platform_triplet.c uses iphoneos-macabi
+				;;
+			*)
+				_host_ident=${IPHONEOS_DEPLOYMENT_TARGET}-$host_cpu-iphoneos-${_host_device}
+				;;
+		esac
+		;;
 	*-apple-ios*)
 		_host_os=`echo $host | cut -d '-' -f3`
 		_host_device=`echo $host | cut -d '-' -f4`