Setting JavaVersion sourceCompatibility in Leiningen (Clojure) for Android (Java 1.7 vs 1.8)

1
votes

I'm trying to get Clojure compiling for Android following this tutorial : https://github.com/clojure-android/lein-droid/wiki/Tutorial

However, I'm hitting an 

unsupported class file version 52.0

error.

This seems to be because I have Java 1.8, but my code needs to be compatible with 1.7 for Android projects.

Got "unsupported class file version 52.0" after including a module to a project seems to suggest I can just set the sourceCompatibility and targetCompatibility (there in the gradle build file.)

Presumably there's an equivalent in Leiningen project.clj files. But I can't find what it is.

So how can I set source and target Compatibility in Leiningen?

1
javaandroidclojureleiningen

1 Answers

1
votes

OK. I managed to resolve my problem with information from here :

https://github.com/clojure-android/lein-droid/issues/161?_pjax=%23js-repo-pjax-container

Basically it's the javac-options attribute.

:javac-options ["-target" "1.7" "-source" "1.7" "-Xlint:-options"]

But I needed to update the annotations.jar (as described on that GitHub page) too.