Compile failure using JDK 21

[DarkTyger]

$ java --version
openjdk 21.0.1 2023-10-17 LTS
OpenJDK Runtime Environment (build 21.0.1+12-LTS)
OpenJDK 64-Bit Server VM (build 21.0.1+12-LTS, mixed mode, sharing)
$ cd /tmp
$ git clone https://github.com/TheLogicMaster/clearwing-vm
$ chmod +x gradlew
$ ./gradlew jar

Expected
JAR file is built.

Actual

FAILURE: Build failed with an exception.

* What went wrong:
Could not open settings generic class cache for settings file '/tmp/clearwing-vm/settings.gradle' ($HOME/.gradle/caches/7.4/scripts/dr00kelqk5ipjhe1a5mvwuy8p).
> BUG! exception in phase 'semantic analysis' in source unit '_BuildScript_' Unsupported class file major version 65

Additional details

$ gradle --version

------------------------------------------------------------
Gradle 8.5
------------------------------------------------------------

Build time:   2023-11-29 14:08:57 UTC
Revision:     28aca86a7180baa17117e0e5ba01d8ea9feca598

Kotlin:       1.9.20
Groovy:       3.0.17
Ant:          Apache Ant(TM) version 1.10.13 compiled on January 4 2023
JVM:          21.0.1 (BellSoft 21.0.1+12-LTS)
OS:           Linux 6.6.7-arch1-1 amd64
$ gradle jar

Output:

$ gradle jar

> Task :annotations:compileJava
warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
3 warnings

> Task :example:compileJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':example:compileJava'.
> Could not resolve all files for configuration ':example:compileClasspath'.
   > Could not find com.thelogicmaster.clearwing-vm:annotations:2.0.0.
     Searched in the following locations:
       - file:$HOME/.m2/repository/com/thelogicmaster/clearwing-vm/annotations/2.0.0/annotations-2.0.0.pom
       - https://repo.maven.apache.org/maven2/com/thelogicmaster/clearwing-vm/annotations/2.0.0/annotations-2.0.0.pom
       - https://jitpack.io/com/thelogicmaster/clearwing-vm/annotations/2.0.0/annotations-2.0.0.pom
     Required by:
         project :example

[nulldoubt]

I hope I'm not late. It seems like your issue is most likely with the versioning.

Take a look at the JitPack for this library.

The versions have a prefixed v in them, e.g. v2.1.0, v2.0.0 and your repository configuration doesn't seem to include that prefixed v.

Try changing the com.thelogicmaster.clearwing-vm:annotations:2.0.0 line in your build.gradle file with com.thelogicmaster.clearwing-vm:annotations:v2.0.0

Or even better, use the latest version: com.thelogicmaster.clearwing-vm:annotations:v2.1.0