[jboss-jira] [JBoss JIRA] (WFLY-13652) Compile using JDK 11

Compile using JDK 11 -------------------- Key: WFLY-13652 URL: https://issues.redhat.com/browse/WFLY-13652 Project: WildFly Issue Type: Task Components: Build System Affects Versions: 20.0.0.Final Reporter: Paul Ferraro Assignee: Paul Ferraro Priority: Major As discussed on wildfly-dev mailing list, to enable the use of multi-release wildfly modules, we will: * Require JDK 11 to compile (for all modules except testsuite modules) ** Adjust compiler flags to use --release=8 *** This is equivalent to: -source N -target N -bootclasspath <bootclasspath-from-N> * To ensure surefire tests are run against each supported JRE (wherever necessary), we will update the CI server maven settings to specify system properties for: ** java8.home ** java11.home * Update JDK8 specific CI servers to build with JDK 11, but run integration tests using Java 8.