libgflags-dev software package provides commandline flags module for C++ (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 libgflags-dev
libgflags-dev is installed in your system.
Make ensure the libgflags-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libgflags-dev *
You will get with libgflags-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libgflags-dev |
| Version | 2.0-1.1ubuntu1 |
| Description | commandline flags module for C++ (development files) |
| Sub Section | libdevel |