The current version of DMTCP doesn't support RPi. In future it may support depending upon the user requirements. If you have a use case which would require DMTCP support for RPi, you should write to dmtcp-forum mailing list on source forge (more details here: http://dmtcp.sourceforge.net/contactUs.html) and we will be happy to work on it.
EDIT: The latest DMTCP release (2.3.1) has added support for RPi.