[SOLVED]Linking a QT5 gui target fails with undefined reference errors.

[vfclists]

A QT5 GUI target fails with the errors below on the latest Lazarus release, ie the 2023-12-23 version.

What could I be missing?

Warning: linker: /usr/bin/ld: ../Lazarus-3.0.0-2023-12-23/lazarus/lcl/units/x86_64-linux/qt5/qtint.o: in function `CREATE':
qtobject.inc(44,0) Error: linker: undefined reference to `QGuiApplication_setFallbackSessionManagementEnabled'
Warning: linker: /usr/bin/ld: ../Lazarus-3.0.0-2023-12-23/lazarus/lcl/units/x86_64-linux/qt5/qtobjects.o: in function `ENDX11SELECTIONLOCK':
qtobjects.pas(3873,0) Error: linker: undefined reference to `QTimer_singleShot3'
dbBrowser2.lpr(37,1) Error: Error while linking

Update:

The latest download from https://github.com/davidbannon/libqt5pas/releases works fine.

[zeljko]

You must rebuild libQt5Pas manually, since your distro did not provide it yet.

[vfclists]

You must rebuild libQt5Pas manually, since your distro did not provide it yet.

Are the releases at https://github.com/davidbannon/libqt5pas suitable?

The latest one there notes:

Whats new
Zeljan says "removed QTimer_singleShot4() overload because it cannot be used with Qt5 < 5.10"

So I take it that QTimer_singleShot3 has now being included and QTimer_singleShot4 deprecated on the Pascal end?

[dbannon]

yes, the libraries at https://github.com/davidbannon/libqt5pas will support anything you can write with Lazarus 3.0 Qt5.

The same library is now available in Debian unstable, should make it to Testing (Trixie) soon. The other deb based distros will start to pick it up then.

Davo