Hi, thanks for your assistance, comments inline: On Mon, 4 May 2020 at 10:48, Jiri Vanek <jva...@redhat.com> wrote: > > Generally, no program can say, that do not support jdk11, because any > javac/java application can be > *hacked* to work with java11 - see > https://jvanek.fedorapeople.org/devconf/2017/portingjavaInternalToJdk9/portingOfItwToJdk9-II.pdf > (really all except package split over modules, which is impossible) > > Now above mentione approaches are indeed *hacked*, and I discourage everybody > to do so.
As you mentioned below, I depend on GWT, and it's waaay to complex to take this approach. > If you package is really bound to jdk8, you can move to the version-full > requires: > BuildRequires: java-1.8.0-openjdk-devel (or java-devel <= 1:1.8.0 or similar) > ... > Requires: java-1.8.0-openjdk(-headless) (or java(-headless) <= 1:1.8.0 or > similar) > > However there is an trap - packages you depends on. Once some of your > dependencies will be compiled > with --target > 8, you are doomed, and you have to bundle it or create its > compact version. By doing > so you can easily end in dependency hell. RStudio only uses Java to compile a series of web components during build time. Then, the requires are clean from Java components, and its usage doesn't invoke the JVM. So it's been identified as a Java app because build-requires java-devel, but it's not really a Java app. > With GWT, I'm afraid you will need to try this approach, as it is to complex > framework that any > hacking on this field is really risky. And I'm sorry to hear they are not on > jdk11 already, as this > fate can likely met many other packages. They build against a very specific version of GWT, and that's why it's bundled. Future versions will update GWT and we will probably be able to use Java 11. Let's see. > Looking to spec of rstudio, and considering it have nearly no not-bundled > dependence, and its > upstream being stuck on jdk8, requiring jdk8 looks like correct step for a > while. If yo have any > influence in upstream, please be force GWT to move to jdk11. > Be aware, that you may end in needing to adapt also launcher, as > japackage-tools will be enforcing > java-11-openjdk. You can easily do it by exporting JAVA_HOME with > /usr/lib/jvm/java-1.8.0-openjdk value > > Good luck, > Please let me know once you success with it. I willa dd an chapter to > https://fedoraproject.org/wiki/Changes/Java11#common_issues_packagers_can_face_and_gathered_solutions Thanks, but as I said above, the RStudio rpms don't pull the JVM, because it's not required at runtime. So I suppose that, beyond fixing the java-devel version in BuildRequires, I don't need to do anything more, right? -- Iñaki Úcar _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org
