gcc-4.7 software package provides GNU C compiler, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gcc-4.7
gcc-4.7 is installed in your system.
Make ensure the gcc-4.7 package were installed using the commands given below,
$ sudo dpkg-query -l | grep gcc-4.7 *
You will get with gcc-4.7 package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Development |
| Package | gcc-4.7 |
| Version | 4.7.2-5 |
| Description | GNU C compiler |
| Sub Section | devel |