qtcreator-dev software package provides Qt Creator plugin development files, 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 qtcreator-dev
qtcreator-dev is installed in your system.
Make ensure the qtcreator-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep qtcreator-dev *
You will get with qtcreator-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Development |
| Package | qtcreator-dev |
| Version | 3.0.1-0ubuntu4 |
| Description | Qt Creator plugin development files |
| Sub Section | devel |