Clojurians Log v2
Clojure programming
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tatut 2025-06-04T12:20:11.641689Z
if I do b/compile-clj what ClassVersion will the generated classes have? does it depend on the jdk used in the compilation process?
tatut 2025-06-04T12:25:59.101979Z
looks like 52 ( Java 8 ) , as per javap -v (compiled with openjdk23)
dpsutton 2025-06-04T13:28:44.857479Z
i believe that’s the classfile version of the Clojure compiler and cannot be adjusted higher or lower.
dpsutton 2025-06-04T13:29:03.715439Z
ie, whether bytecode is in memory or disk you are getting java 8 bytecode
Alex Miller (Clojure team) 2025-06-04T14:05:48.799739Z
Correct, it is always Java 8 bytecode, this is hardcoded in the compiler
Alex Miller (Clojure team) 2025-06-04T14:06:16.622309Z
(Likely to move forward in clojure 1.13)
Alex Miller (Clojure team) 2025-06-04T14:10:31.165729Z
Does not use the Java compiler, so that’s irrelevant here
✅ 1
tatut 2025-06-05T07:19:34.457719Z
for context, I had a case of having to upgrade JVM used in Github Actions because the newer google closure had jdk21 (65) class versions, so I wanted to check that it won't affect the build