[Lazarus] IDE qt5 compile error

[John Landmesser]

I can't compile lazarus IDE anymore:

Lazarus 2.3.0 (rev main-2_3-991-ge2ad6b3d8d) FPC 3.2.2 x86_64-linux-gtk2

error:

Error: /home/john1/lazarus/lcl/interfaces//qt5/qtobject.inc:42:
undefined reference to `QGuiApplication_setFallbackSessionManagementEnabled'

I am on Manjaro Linux stable branch:

System:
   Host: manjaro Kernel: 5.15.28-1-MANJARO x86_64 bits: 64
     Desktop: Xfce 4.16.0 Distro: Manjaro Linux

The package qt5pas was updated 14,03,2022 the packager tells as source:

https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/main/lcl/interfaces/qt5/cbindings

Because i think freepascal changed something i post this here.

Manjaro tells me to the last update:

Qt5 got an official update after one year and is now at 5.15.3 6
including the regular KDE patch-sets. Be sure you rebuild any AUR Qt
package against this one.

What to do?