libgmlib1-dbg software package provides gnome-mplayer library (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 libgmlib1-dbg
libgmlib1-dbg is installed in your system.
Make ensure the libgmlib1-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep libgmlib1-dbg *
You will get with libgmlib1-dbg package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Debug packages |
| Package | libgmlib1-dbg |
| Version | 1.0.8-3 |
| Description | gnome-mplayer library (debugging symbols) |
| Sub Section | debug |