Here’s how I backported the Ubuntu package for CMake 2.8.5 to natty, making it available in a Launchpad PPA. Instead of using apt-get source, debuild and dput manually I opted for the handy script backportpackage, which can be found in the ubuntu-dev-utils package.

The problem: writing a very simple Makefile to build a C shared library. Let’s say we have just coded the most wonderful library foo, which – not too surprisingly – has greetings as its main purpose.