[BUG] java.lang.UnsatisfiedLinkError undefined symbol: _ZTIN16QNativeInterface7Private10QXcbScreenE

[januhlir]

Failure to load QtJambi libraries.

Trying to run the most basic Qt example, it fails on the fist line:

        QApplication.initialize(args);

Exception:

/home/espinosa/bin/jdk-21.0.2/bin/java -Djava.library.path=/home/espinosa/build/qt-build/qt-everywhere-src-6.6.2/build-123/qtbase/lib -javaagent:/home/espinosa/bin/idea-IC-231.9011.34/lib/idea_rt.jar=36465:/home/espinosa/bin/idea-IC-231.9011.34/bin -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath /home/espinosa/workspace2/qt-jambi-1/target/classes:/home/espinosa/.m2/repository/io/qtjambi/qtjambi/6.6.2/qtjambi-6.6.2.jar:/home/espinosa/.m2/repository/io/qtjambi/qtjambi-native-linux-x64/6.6.2/qtjambi-native-linux-x64-6.6.2.jar org.example.Main
Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/QtJambi6.6.2_6334/lib/libQtJambiGui.so.6.6.2: /tmp/QtJambi6.6.2_6334/lib/libQtJambiGui.so.6.6.2: undefined symbol: _ZTIN16QNativeInterface7Private10QXcbScreenE, version Qt_6_PRIVATE_API
    at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)
    at java.base/jdk.internal.loader.NativeLibraries$NativeLibraryImpl.open(NativeLibraries.java:331)
    at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:197)
    at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:139)
    at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2418)
    at java.base/java.lang.Runtime.load0(Runtime.java:852)
    at java.base/java.lang.Runtime.load(Runtime.java:838)
    at io.qt.internal.LibraryUtility.loadNativeLibrary(LibraryUtility.java:2408)
    at io.qt.internal.LibraryUtility.loadQtJambiLibrary(LibraryUtility.java:1990)
    at io.qt.internal.LibraryUtility.loadQtJambiLibrary(LibraryUtility.java:1813)
    at io.qt.internal.NativeUtility.loadQtJambiLibrary(NativeUtility.java:614)
    at io.qt.Utility.loadQtJambiLibrary(QtObject.java:146)
    at io.qt.QtUtilities.loadQtJambiLibrary(QtUtilities.java:115)
    at io.qt.gui.QtJambi_LibraryUtilities.<clinit>(QtJambi_LibraryUtilities.java:37)
    at io.qt.gui.QGuiApplication.<clinit>(QGuiApplication.java:13)
    at org.example.Main.main(Main.java:17)

It's run from IntelliJ, hence the javaagent bit. QtJambi s from Maven.

System

• OS: Linux, openSuse Slowroll
• Java version: 21.0.2 for Adoptium (Temurin)
• QtJambi version: 6.2.2
  • Qt version: 6.2.2 compiled from source

[omix]

This is not a bug. Either use pre-built Qt binaries from Qt installer or also build QtJambi from source based on your Qt build.

[januhlir]

build QtJambi from source based on your Qt build.

Unfortunately, that would not work in other distributions. I'm looking for a cross-distribution friendly solution.

pre-built Qt binaries from Qt installer

That requires Qt account and not sure if I can distribute them with my app.

I tried binaries from Flatpak, from QtCreator, from Flathub, and I got similar error. Though the Qt version there is 6.6.3 version. Flatpak/FlatHub distributed Qt would be the best solution. Truly working everywhere. I would like to eventually distribute my app through Flatpak/Flathub.

[omix]

The cross distro solution is to ship your software along with Qt and Jambi binaries. It doesn't matter if you ship your own builds or those of Qt installer+Maven Jambi. The license terms of Qt installer is GPL/LGPL, i.e. you can use these also for distribution according to my understanding.

The Qt builds on different Linux distros are too different to find a general solution. This is because they differ in enabled features, dependencies, used compilers and compiler versions.