[Bug]: configure.py and kBuild hardcode 'VBox' Qt library infix (-lQt6CoreVBox) and legacy GTK2 plugins when building with --with-qt-dir on Linux

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Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
52/100
Tipo di issue
Bug
Chiarezza
Abbastanza chiara
Stato di attività
Attiva
Stack tecnologico
c, cpp
Ambito
build-system, devtools

Direzione di ricerca

Start by reading configure.py and the kBuild rules that select Qt libraries and stage plugins; the report identifies those as the failing paths but does not give specific rule files. Reproduce with the stated Qt 6.8 SDK and --with-qt-dir, then inspect the missing library and GTK2 plugin dependencies. Done when configuration and staging work with upstream Qt 6.8 without the reported missing targets.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

bug
Version

7.2.22

Host OS Type

Linux

Host OS name + version

Debian 12 (Bookworm)

Host Architecture

x86

Guest OS Type

other

Guest Architecture

x86

Guest OS name + version

N/A (Host build system: configure.py and kBuild)

Component

Other

What happened?

When building VirtualBox trunk (r113835) on Debian 12 x86_64 using a standard upstream Qt 6.8.0 SDK directory via --with-qt-dir=$HOME/Qt/6.8.0/gcc_64, three build issues occur:

1. configure.py hardcodes -lQt6CoreVBox instead of -lQt6Core

Running:

./configure --disable-hardening --disable-docs --disable-java --with-qt-dir=$HOME/Qt/6.8.0/gcc_64

fails the Qt library check because configure.py links the test binary against Oracle's internal suffixed library name -lQt6CoreVBox:

[WARN]: Compilation of test program for qt failed
[WARN]:    g++ -I/usr/include/c++/12 -I/home/adrian/Qt/6.8.0/gcc_64/include -L/home/adrian/Qt/6.8.0/gcc_64/lib /tmp/tmp61yp9ocv/testlib.cpp -fPIC -o /tmp/tmp61yp9ocv/testlib -std=c++17 -Wl,-rpath,/home/adrian/Qt/6.8.0/gcc_64/lib -lQt6CoreVBox
[WARN]: /usr/bin/ld: cannot find -lQt6CoreVBox: No such file or directory
collect2: error: ld returned 1 exit status
2. kBuild still expects the VBox infix on Qt6 libraries and plugins

After patching configure.py (s/Qt6CoreVBox/Qt6Core/g), configure.py succeeds, but kmk fails because the VBox infix is still expected on the libraries and plugins inside --with-qt-dir:

kmk: *** No rule to make target '/home/adrian/Qt/6.8.0/gcc_64/lib/libQt6CoreVBox.so', needed by '/home/adrian/vbox-build/vbox/out/linux.amd64/release/obj/VBoxDbg/VBoxDbg.so'.  Stop.
kmk: *** No rule to make target '/home/adrian/Qt/6.8.0/gcc_64/plugins/platforms/libqxcbVBox.so', needed by '/home/adrian/vbox-build/vbox/out/linux.amd64/release/obj/qt-bin/plugins/platforms/libqxcbVBox.so'.  Stop.
3. Pass - Staging requires legacy GTK2 Qt plugins removed in Qt 6

During kBuild: Pass - Staging, the build fails looking for libqgtk2VBox.so and libqgtk2styleVBox.so:

kmk: *** No rule to make target '/home/adrian/Qt/6.8.0/gcc_64/plugins/platformthemes/libqgtk2VBox.so', needed by '/home/adrian/vbox-build/vbox/out/linux.amd64/release/obj/qt-bin/plugins/platformthemes/libqgtk2VBox.so'.  Stop.
kmk: *** No rule to make target '/home/adrian/Qt/6.8.0/gcc_64/plugins/styles/libqgtk2styleVBox.so', needed by '/home/adrian/vbox-build/vbox/out/linux.amd64/release/obj/qt-bin/plugins/styles/libqgtk2styleVBox.so'.  Stop.

In Qt 6.8, GTK2 plugins do not exist (replaced by plugins/platformthemes/libqgtk3.so).

Workaround used to complete the build
  1. Replace Qt6CoreVBox with Qt6Core in configure.py.
  2. Create *VBox.so symlinks for lib/libQt6*.so* and plugins/**/*.so in the Qt 6.8 SDK directory.
  3. Symlink plugins/platformthemes/libqgtk2VBox.so and plugins/styles/libqgtk2styleVBox.so.
How can we reproduce this?
  1. On Debian 12 (x86_64), check out VirtualBox trunk: 
    svn co https://www.virtualbox.org/svn/vbox/trunk vbox
cd vbox
  2. Install an upstream Qt 6.8.0 SDK (linux_gcc_64) into $HOME/Qt/6.8.0/gcc_64.
  3. Run ./configure pointing --with-qt-dir to the Qt 6.8.0 directory: 
    export LD_LIBRARY_PATH="$HOME/Qt/6.8.0/gcc_64/lib:$LD_LIBRARY_PATH"
export PATH="$HOME/Qt/6.8.0/gcc_64/bin:$PATH"
./configure --disable-hardening --disable-docs --disable-java --with-qt-dir=$HOME/Qt/6.8.0/gcc_64
    -> Observe configure.log failing with /usr/bin/ld: cannot find -lQt6CoreVBox.
  4. Replace Qt6CoreVBox with Qt6Core in configure.py, re-run ./configure, source ./env.sh, and run kmk -j$(nproc):
    -> Observe kmk stopping on missing libQt6CoreVBox.so, libqxcbVBox.so, libqgtk2VBox.so, and libqgtk2styleVBox.so.
Did you upload all of your necessary log files, screenshots, etc.?
  • Yes, I've uploaded all pertinent files to this issue.
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