autoconf software package provides automatic configure script builder, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install autoconf
autoconf is installed in your system.
Make ensure the autoconf package were installed using the commands given below,
$ sudo dpkg-query -l | grep autoconf *
You will get with autoconf package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Development |
| Package | autoconf |
| Version | 2.68-1ubuntu2 |
| Description | automatic configure script builder |
| Sub Section | devel |