fortran77-compiler software package provides virtual package provided by fort77, 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 fortran77-compiler
fortran77-compiler is installed in your system.
Make ensure the fortran77-compiler package were installed using the commands given below,
$ sudo dpkg-query -l | grep fortran77-compiler*
You will get with fortran77-compiler package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Virtual packages |
| Package | fortran77-compiler |
| Version | |
| Description | virtual package provided by fort77 |
| Sub Section | virtual |