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

Dennis Luehring dl.soluz at gmx.net
Thu Nov 17 21:15:20 CET 2022

Am 17.11.2022 um 20:42 schrieb Alexey Edelev:
> Hi,
> You may try to override the system library using the LD_PRELOAD environment
> variable. So ld will prefer to resolve the missing symbols from your
> library but not the system one:
> https://man7.org/linux/man-pages/man8/ld.so.8.html
> Also IRRC, setting LD_LIBRARY_PATH to the directory containing the custom
> library, may force using your library instead of the system one.
> Regards,
> Alexey.

i will try that thanks

but why is that LD_PRELOAD/LD_LIBRARY_PATH-stuff not needed for a self
build Glib?

build Glib

   cd ~/qt6_dev
   git clone https://gitlab.gnome.org/GNOME/glib.git
   cd glib
   git checkout 2.72.1
   cd ..
   mkdir glib-build
   cd glib-build
   meson setup ../glib -Dbuildtype=debug --prefix ~/qt6_dev/glib-install
   meson compile
   meson install

rebuild qt6 with my build Glib

   cd qt6-build
   rm * -rf
../qt6/qtbase/configure -debug -opensource -nomake examples -nomake
tests -prefix ~/qt6_dev/qt6-install
   cmake --build . --parallel 4
   cmake --install .

only difference to dbus is the PKG_CONFIG_PATH

as a result is that all qt libs are directly refering to my self build Glib

ldd /home/linux/qt6_dev/qt6-build/lib/libQt6Core.so | grep glib
   libglib-2.0.so.0 =>

ldd /home/linux/qt6_dev/qt6-build/lib/libQt6DBus.so.6 | grep glib
   libglib-2.0.so.0 =>

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