libxres-dev software package provides X11 Resource extension library (development headers), 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 libxres-dev
libxres-dev is installed in your system.
Make ensure the libxres-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libxres-dev *
You will get with libxres-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libxres-dev |
| Version | 2:1.0.7-1 |
| Description | X11 Resource extension library (development headers) |
| Sub Section | libdevel |