This option was removed in JRE 10 and its presence causes error on startup. Artemis still does not compile on JDK 9 and up, so what I tried was to compile on JDK 1.8 and then start Artemis on 1.8 and 10. That now works for me.
https://issues.apache.org/jira/browse/ARTEMIS-113 Better organize examples https://issues.apache.org/jira/browse/ARTEMIS-114 Some openwire examples