Orion,
I believe you have to use openjdk 24 as gradle 8.14.x doesn't support 25.
I also had to add -Dorg.gradle.java.home=/correct/path as it insisted on
using the wrong version of many installed locally.
Otherwise I found it pretty trivial to build, good luck.
Z
On 14/10/25 10:52, Orion Poplawski wrote:
So I'm stepping back to simply try building openjfx with gradlew but I
get:
$ sh gradlew --info build
Initialized native services in: /home/orion/.gradle/native
Initialized jansi services in: /home/orion/.gradle/native
The client will now receive all logging from the daemon (pid: 253483).
The daemon log file:
/home/orion/.gradle/daemon/8.14.2/daemon-253483.out.log
Starting 2nd build in daemon [uptime: 2 mins 22.763 secs, performance:
97%, GC rate: 0.00/s, heap usage: 2% of 512 MiB, non-heap usage: 9% of
384 MiB]
Using 6 worker leases.
Now considering [/home/orion/openjfx-25/jfx25u-25-29] as hierarchies
to watch
Now considering [/home/orion/openjfx-25/jfx25u-25-29/buildSrc,
/home/orion/openjfx-25/jfx25u-25-29] as hierarchies to watch
Watching the file system is configured to be enabled if available
File system watching is active
Starting Build
Caching disabled for Groovy DSL script compilation (settings) because:
Build cache is disabled
Not worth caching.
Compiling settings file
'/home/orion/openjfx-25/jfx25u-25-29/settings.gradle' using
BuildScriptTransformer.
FAILURE: Build failed with an exception.
* What went wrong:
BUG! exception in phase 'semantic analysis' in source unit
'_BuildScript_' Unsupported class file major version 69
> Unsupported class file major version 69
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
BUILD FAILED in 466ms
$ java --version
openjdk 25 2025-09-16
OpenJDK Runtime Environment (Red_Hat-25.0.0.0.36-1) (build 25+36)
OpenJDK 64-Bit Server VM (Red_Hat-25.0.0.0.36-1) (build 25+36, mixed
mode, sharing)
What am I doing wrong?
