[Interest] how to link my own DBus lib build to Qt 6.4?

[Dennis Luehring]

it works so far with m own Glib build but the dbus lib is always the
systems one

my steps

build dbus

   cd ~/qt6_dev
   git clone https://github.com/freedesktop/dbus.git
   cd dbus
   git checkout dbus-1.14.4
   cd ..
   mkdir dbus-build
   cd dbus-build
   cmake ../dbus -DCMAKE_INSTALL_PREFIX=~/qt6_dev/dbus-install
   cmake --build . --parallel 4
   cmake --install .

creates a dbus-1.pc pkgconfig in ~/qt6_dev/dbus-install/lib/pkgconfig
and a libdbus-1.so, libdbus-1.so.3 etc in ~/qt6_dev/dbus-install/lib

build qt

   cd ~/qt6_dev
   git clone git://code.qt.io/qt/qt5.git qt6
   cd qt6
   git checkout v6.4.0
   perl init-repository
   cd ..
   mkdir qt6-build
   cd qt6-build
   PKG_CONFIG_PATH=~/qt6_dev/dbus-install/lib/pkgconfig
../qt6/qtbase/configure -debug -opensource -nomake examples -nomake
tests -prefix ~/qt6_dev/qt6-install
   cmake --build . --parallel 4
   cmake --install .

but libQt6DBus.so.6 still referes to the systems libdbus-1.so.3

linux at linux-virtual-machine:~/qt6_dev/qt6-build$ ldd
/home/linux/qt6_dev/qt6-build/lib/libQt6DBus.so.6
   linux-vdso.so.1 (0x00007ffc965eb000)
   libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3
(0x00007f43375bf000)
   libQt6Core.so.6 => /home/linux/qt6_dev/qt6-build/lib/libQt6Core.so.6
(0x00007f4336f1b000)
   libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007f4336cf1000)
   libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4336ac9000)
   ...

works out of the box with Glib (only the PKG_CONFIG_PATH is different)
it seems that my dbus pkgconfig seems to be ignored

and raising the log-level doesn't give more information