Problems linking DBus on Trusty starting with Qt 5.11

Garagorn

Starting with Qt 5.11 (both .0 and .1), projects using DBus are failing to link on some older build platforms, including Ubuntu Trusty (14.x).

Note: Using pre-built Qt linux x64 binaries installed via the online installer.

Happens with our project, also with Qt samples using DBus when try to build them in Qt Creator. Get a bunch of linker errors.

5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_message_copy@LIBDBUS_1_3' 5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_bus_register@LIBDBUS_1_3'
5.11.1/gcc_64/lib/libQt5WebEngineCore.so.5.11.1: undefined reference to dbus_watch_get_data@LIBDBUS_1_3' 5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_server_set_timeout_functions@LIBDBUS_1_3'
5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_connection_close@LIBDBUS_1_3' 5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_message_get_signature@LIBDBUS_1_3'
5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_message_new_signal@LIBDBUS_1_3' 5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_message_iter_append_fixed_array@LIBDBUS_1_3'
5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_message_set_sender@LIBDBUS_1_3' 5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to dbus_message_get_type@LIBDBUS_1_3'
5.11.1/gcc_64/lib/libQt5DBus.so.5.11.1: undefined reference to `dbus_message_new_method_call@LIBDBUS_1_3'

SGaist

Hi,

What version of DBus do you have installed on your system ?

Garagorn

Discussing in a Qt bug: https://bugreports.qt.io/browse/QTBUG-69100

SGaist

Thanks for the link.

So as I suspected, you are using too old of a version of that library.