Getting started with pion network library

I have downloaded and installed the pion network library.

I am trying to build the sample web services (HelloService etc). However, I cannot find instructions on how to build the examples. Running make in the directory returns 'Nothing to be done for all'

Has anyone ever managed to build the pion network library web service examples?

I am developing on Ubuntu开发者_开发技巧 10.x

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There is an interesting tutorial here : http://prog-xp.blogspot.fr/2011/01/creating-simple-web-server-with-pion.html