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

[Gavin Ray]

Thanks for the swift reply Sundararajan,

Running this seems to produce one output, it looks like something is there:

[user at MSI] $
/usr/lib/jvm/java-19-openjdk-19.0.0.0.36-2.rolling.fc38.x86_64/bin/java
--list-modules | grep jdk.compiler
jdk.compiler at 19

Where the output line is "jdk.compiler at 19"

[image: image.png]

It's not so much a big deal, I installed JDK 17 and used that as the Gradle
compiler and it worked
Probably it is something I am doing wrong and not worth investing time into

I have written a Dockerfile that builds jextract from source and allows you
to use it without installing anything
It is late here so I haven't had time to test it yet, but I will
double-check it tomorrow and submit it as a PR to repo so folks can use
this if they want:

https://gist.github.com/GavinRay97/45365bf3b7d49ae335c525ffd51605c4

Then anyone can run jextract like:
docker run --rm -it jextract:v0.x <flags>

=)


On Tue, Sep 20, 2022 at 11:36 PM Sundararajan Athijegannathan <
sundararajan.athijegannathan at oracle.com> wrote:

> Hi,
>
> I just checked with Oracle jdk19 installation + jextract repo's master
> branch. Build/verify worked as expected on mac.
>
> From the error message you posted, it seems "jdk.compiler" module is
> missing in your jdk19 installation. jextract needs jdk.compiler module to
> compile the extracted Java sources to produce .class files.
>
> Will you please check if the following command prints "jdk.compiler"?
>
> /usr/lib/jvm/java-19-openjdk-19.0.0.0.36-2.rolling.fc38.x86_64/bin/java
> --list-modules | grep jdk.compiler
>
> For example, in my case
>
> $ /Library/Java/JavaVirtualMachines/jdk-19.jdk/Contents/Home/bin/java \
>
> >   --list-modules | grep jdk.compiler
>
> jdk.compiler at 19
>
>
> If not, that installation may be missing compiler module (perhaps
> generated by jlink invocation). Solution is to install a full JDK 19.
>
>
> Hope this helps,
>
> -Sundar
>
>
>
>
> ------------------------------
> *From:* panama-dev <panama-dev-retn at openjdk.org> on behalf of Gavin Ray <
> ray.gavin97 at gmail.com>
> *Sent:* 21 September 2022 07:35
> *To:* panama-dev at openjdk.org <panama-dev at openjdk.org>
> *Subject:* Trying to build j-extract on Linux throws
> "java.lang.module.FindException: Module jdk.compiler not found"
>
> 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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