lib32gcc-4.7-dev software package provides GCC support library (32 bit 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 lib32gcc-4.7-dev
lib32gcc-4.7-dev is installed in your system.
Make ensure the lib32gcc-4.7-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep lib32gcc-4.7-dev *
You will get with lib32gcc-4.7-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | lib32gcc-4.7-dev |
| Version | 4.7.3-12ubuntu1 |
| Description | GCC support library (32 bit development files) |
| Sub Section | libdevel |