qtx11extras5-dbg software package provides Qt 5 X11 extras libraries debugging symbols, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install qtx11extras5-dbg
qtx11extras5-dbg is installed in your system.
Make ensure the qtx11extras5-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep qtx11extras5-dbg *
You will get with qtx11extras5-dbg package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Debug packages |
| Package | qtx11extras5-dbg |
| Version | 5.2.1-1 |
| Description | Qt 5 X11 extras libraries debugging symbols |
| Sub Section | debug |