libmng-dev software package provides M-N-G 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 libmng-dev
libmng-dev is installed in your system.
Make ensure the libmng-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libmng-dev *
You will get with libmng-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libmng-dev |
| Version | 2.0.2-0ubuntu3 |
| Description | M-N-G library (Development headers) |
| Sub Section | libdevel |