gobjc-4.7 software package provides GNU Objective-C compiler, 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 gobjc-4.7
gobjc-4.7 is installed in your system.
Make ensure the gobjc-4.7 package were installed using the commands given below,
$ sudo dpkg-query -l | grep gobjc-4.7 *
You will get with gobjc-4.7 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Development |
| Package | gobjc-4.7 |
| Version | 4.7.3-12ubuntu1 |
| Description | GNU Objective-C compiler |
| Sub Section | devel |