One idea: we could move (actually copy) the StackLocator interface to the Java 9 module. This allows us to build the Java 9 module first. Then, when building the log4j-api module, the Java 9 classes can be shaded into the log4j-api jar (excluding StackLocator since we want to compile that interface with Java 7).
That way all modules depend on Java 7 except the log4j-api-java9 module which depends on Java 9. This is clean, works well in IDEs and does not require the toolchain workaround. The whole project could probably be compiled with just JDK 9 this way. Started to play with this but could not finish today. Need to continue tomorrow. On Tue, May 23, 2017 at 12:59 AM, Ralph Goers <ralph.go...@dslextreme.com> wrote: > Java 9 now has a —release option which should help. However, if we set it > to Java 7 I suspect the build will fail on the Java 9 stuff even though we > are using the Java 9 compiler. I really don’t see a way to do this except > by calling the compiler multiple times. > > Ralph > > > On May 22, 2017, at 8:49 AM, Matt Sicker <boa...@gmail.com> wrote: > > > > I still want to see a better Maven plugin for handling Java 9 > multi-release > > jars and things like that. The whole Java 9 build is still rather hacky. > If > > the entire project was buildable in Java 9 and could still target 7, 8, > and > > 9, then that would be a simpler solution IMO. > > > > On 22 May 2017 at 06:16, Mikael Ståldal <mi...@apache.org> wrote: > > > >> IntelliJ IDEA is "smart" enough to automatically pick up the > >> src/main/java9 folder. > >> > >> > >> > >> On 2017-05-21 22:26, Ralph Goers wrote: > >> > >>> Since src/main/java9 isn’t normally considered a source directory you > >>> should be able to work with Java 7 as well. It will just ignore the > Java 9 > >>> files. > >>> > >>> Ralph > >>> > >>> On May 21, 2017, at 5:50 AM, Gary Gregory <garydgreg...@gmail.com> > wrote: > >>>> > >>>> I set the JRE for that project to Java 9. I do not think you can set > the > >>>> JRE per source folder, only per project. > >>>> > >>>> Gary > >>>> > >>>> On May 21, 2017 1:29 AM, "Ralph Goers" <ralph.go...@dslextreme.com> > >>>> wrote: > >>>> > >>>> I’ve modified the build to put the Java 9 classes of the API into a > >>>> separate source directory. Can you see if that helps things in > Eclipse? > >>>> > >>>> Ralph > >>>> > >>> > >>> > >> > > > > > > -- > > Matt Sicker <boa...@gmail.com> > > >
