I applied that patch, turned on fastmint in the Makefile and put it in:
http://www.hashcash.org/source/current/hashcash-1.03/hashcash -1.03pr1.tgz
I notice the fastest version on P4 seems to have decided it doesn't work on this hardware:
Rate Name (* machine default)
1536929 ANSI Compact 1-pipe *
-------------------------------------------------------------- from: Jonathan "Chromatix" Morton mail: chromi@xxxxxxxxxxxxxxxxxxxxx website: http://www.chromatix.uklinux.net/ tagline: The key to knowledge is not to rely on people to teach you it.