Hello,
The link from this page:
http://www.ros.org/wiki/DevelopersGuide#Code_layout
to
https://code.ros.org/svn/ros/stacks/ros/trunk/3rdparty/pycrypto/Makefile?view=markup
is broken because now pycrypto is a system-level dependency.
It would be nice to find another example of how to wrap an external library.
Kind regards and a happy new year,
Stéphane
--
Dr Stéphane Magnenat
http://stephane.magnenat.net