qtdeclarative5-dev software package provides Qt 5 declarative 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 qtdeclarative5-dev
qtdeclarative5-dev is installed in your system.
Make ensure the qtdeclarative5-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep qtdeclarative5-dev *
You will get with qtdeclarative5-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | qtdeclarative5-dev |
| Version | 5.2.1-3ubuntu15 |
| Description | Qt 5 declarative development files |
| Sub Section | libdevel |