I've ported all my packages to be buildable with OpenJDK 17. I have not pushed the changes to dist-git yet, but I will do it before the end of the week. I wanted to share common problems I encountered and solutions I came up with. I hope that this will help others trying to port their packages. Problem 1: Compiler source/target levels 1.6 are no longer supported Solution: Bump source/target levels to 1.7 or 1.8

Hi, On Wed, Nov 3, 2021 at 10:32 AM Mikolaj Izdebski <mizdebsk(a)redhat.com&gt; wrote: In my opinion, we really shouldn't be enabling the use of this outdated tech, which is very likely to be deployed in all sorts of very insecure ways.

PR for the changes were submitted, tested and merged into dist-git.

FTR, pull requests implementing the change: - apache-commons-beanutils: https://src.fedoraproject.org/rpms/apache-commons-beanutils/pull-request/2 - apache-commons-collections: https://src.fedoraproject.org/rpms/apache-commons-collections/pull-request/3 - apache-commons-jxpath: https://src.fedoraproject.org/rpms/apache-commons-jxpath/pull-request/1 - apache-commons-logging: https://src.fedoraproject.org/rpms/apache-commons-logging/pull-request/3 - apache-commons-net: https://src.fedoraproject.org/rpms/apache-commons-net/pull-request/1 - apiguardian: https://src.fedoraproject.org/rpms/apiguardian/pull-request/3 - atinject: https://src.fedoraproject.org/rpms/atinject/pull-request/1 - bsf: https://src.fedoraproject.org/rpms/bsf/pull-request/4 - cglib: https://src.fedoraproject.org/rpms/cglib/pull-request/3 - easymock: https://src.fedoraproject.org/rpms/easymock/pull-request/2 - jakarta-mail: https://src.fedoraproject.org/rpms/jakarta-mail/pull-request/1 - java_cup: https://src.fedoraproject.org/rpms/java_cup/pull-request/2 - javapackages-bootstrap: https://src.fedoraproject.org/rpms/javapackages-bootstrap/pull-request/5 - javapackages-tools: https://src.fedoraproject.org/rpms/javapackages-tools/pull-request/7 - jdom: https://src.fedoraproject.org/rpms/jdom/pull-request/3 - jdom2: https://src.fedoraproject.org/rpms/jdom2/pull-request/4 - jsch: https://src.fedoraproject.org/rpms/jsch/pull-request/2 - junit: https://src.fedoraproject.org/rpms/junit/pull-request/5 - jzlib: https://src.fedoraproject.org/rpms/jzlib/pull-request/1 - maven: https://src.fedoraproject.org/rpms/maven/pull-request/30 - maven-file-management: https://src.fedoraproject.org/rpms/maven-file-management/pull-request/1 - maven-plugin-testing: https://src.fedoraproject.org/rpms/maven-plugin-testing/pull-request/1 - maven-shared-io: https://src.fedoraproject.org/rpms/maven-shared-io/pull-request/1 - mockito: https://src.fedoraproject.org/rpms/mockito/pull-request/3 - munge-maven-plugin: https://src.fedoraproject.org/rpms/munge-maven-plugin/pull-request/1 - objectweb-asm: https://src.fedoraproject.org/rpms/objectweb-asm/pull-request/7 - opentest4j: https://src.fedoraproject.org/rpms/opentest4j/pull-request/2 - osgi-annotation: https://src.fedoraproject.org/rpms/osgi-annotation/pull-request/3 - plexus-build-api: https://src.fedoraproject.org/rpms/plexus-build-api/pull-request/2 - qdox: https://src.fedoraproject.org/rpms/qdox/pull-request/4 - sisu-mojos: https://src.fedoraproject.org/rpms/sisu-mojos/pull-request/4 - univocity-parsers: https://src.fedoraproject.org/rpms/univocity-parsers/pull-request/5 - xalan-j2: https://src.fedoraproject.org/rpms/xalan-j2/pull-request/3 - xbean: https://src.fedoraproject.org/rpms/xbean/pull-request/7 - xml-commons-apis: https://src.fedoraproject.org/rpms/xml-commons-apis/pull-request/1 - xmvn: https://src.fedoraproject.org/rpms/xmvn/pull-request/8 -- Mikolaj Izdebski On Wed, Nov 3, 2021 at 10:29 AM Mikolaj Izdebski <mizdebsk(a)redhat.com&gt; wrote: > > Hello, > > I've ported all my packages to be buildable with OpenJDK 17. > I have not pushed the changes to dist-git yet, but I will do it before > the end of the week. > > I wanted to share common problems I encountered and solutions I came up with. > I hope that this will help others trying to port their packages. > > Problem 1: Compiler source/target levels 1.6 are no longer supported > Solution: Bump source/target levels to 1.7 or 1.8 > Packages affected: > - apache-commons-beanutils > - apache-commons-collections > - apache-commons-jxpath > - apache-commons-logging > - apache-commons-net > - apiguardian > - atinject > - bsf > - cglib > - java_cup > - jdom > - jdom2 > - jsch > - junit > - jzlib > - maven-file-management > - maven-plugin-testing > - maven-shared-io > - munge-maven-plugin > - opentest4j > - osgi-annotation > - plexus-build-api > - qdox > - sisu-mojos > - xalan-j2 > - xbean > - xml-commons-apis > > Problem 2: Tests that use reflection fail with <<module java.base does > not "opens java.lang">> or similar error > Solution: Run tests with appropriate --add-opens parameter passed to JVM > Packages affected: > - easymock > - mockito > - xmvn > > Problem 3: Code does not recognize Java bytecode version 61.0 > Solution: Update to newer upstream version that supports newer Java bytecode. > Package affected: > - objectweb-asm > > Problem 4: Code is compiled with -Werror passed to javac, but OpenJDK > 17 introduces new warnings > Solution: Do not pass -Werror to Java compiler > Package affected: > - jakarta-mail > > Problem 5: Wildcard imports are used in the code, but OpenJDK 17 > introduces new classes that cause import ambiguity > Solution: Add explicit imports > Package affected: > - univocity-parsers > > Packages that needed changes to make RPM Java packaging tooling to > work with OpenJDK 17: > - javapackages-bootstrap > - javapackages-tools > - maven > > -- > Mikolaj