Install autoconf 2.69 on Ubuntu 12.04

Question

The default version of autoconf in 12.04 is version 2.8. How can I upgrade to autoconf 2.9?

Answer 1

It looks like the ppa:costamagnagianfranco PPA is no longer active or at least didn't work for me.

Instead there is a PPA available for a lot of GNU libraries at https://launchpad.net/~dns/+archive/ubuntu/gnu

For example this allowed me to install Autoconf 2.69 on Travis:

before_script:
  - sudo add-apt-repository ppa:dns/gnu -y
  - sudo apt-get update -q
  - sudo apt-get install --only-upgrade autoconf

Answer 2

Use a PPA: ppa:costamagnagianfranco/autoconf

For information on how to PPAs see: What are PPAs and how do I use them?