Trying to build j-extract on Linux throws "java.lang.module.FindException: Module jdk.compiler not found"

[Gavin Ray]

Hello all,

I'm trying to generate jextract types for io_uring (I didn't find any
non-JNI/JNA libraries to use it from JVM)
Unfortunately, following the instructions I've hit a snag.

Building it with JDK 19, I get:
=============================================
[user at MSI jextract]$ sh ./gradlew \
-Pjdk19_home=/usr/lib/jvm/java-19-openjdk-19.0.0.0.36-2.rolling.fc38.x86_64
\
-Pllvm_home=/home/user/downloads/clang+llvm-15.0.0-aarch64-linux-gnu clean
verify

> Task :compileJava
Note: Some input files use preview features of Java SE 19.
Note: Recompile with -Xlint:preview for details.

> Task :createJextractImage FAILED
Error: Module jdk.compiler not found
java.lang.module.FindException: Module jdk.compiler not found
        at java.base/java.lang.module.Resolver.findFail(Resolver.java:892)
        at java.base/java.lang.module.Resolver.resolve(Resolver.java:129)
        at
java.base/java.lang.module.Configuration.resolve(Configuration.java:420)
        at
java.base/java.lang.module.Configuration.resolve(Configuration.java:254)
        at
jdk.jlink/jdk.tools.jlink.internal.Jlink$JlinkConfiguration.resolve(Jlink.java:217)
        at
jdk.jlink/jdk.tools.jlink.internal.JlinkTask.createImageProvider(JlinkTask.java:536)
        at
jdk.jlink/jdk.tools.jlink.internal.JlinkTask.createImage(JlinkTask.java:424)
        at
jdk.jlink/jdk.tools.jlink.internal.JlinkTask.run(JlinkTask.java:276)
        at jdk.jlink/jdk.tools.jlink.internal.Main.run(Main.java:56)
        at jdk.jlink/jdk.tools.jlink.internal.Main.main(Main.java:34)
=============================================

Would it make sense to add a Dockerfile for Linux to the repo that can
reliably build the latest version?
That way folks don't have to mess around with finding and installing LLVM
and whatnot.

I'm happy to submit a PR for this if someone can tell me why the regular
build command is failing, ha.
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