We’ve wanted some advaced feature in the Fhtagn! builds, which would have been pretty ugly to hack up in autotools. For that reason, and because it just makes building a bit nicer, we’ve moved trunk over to use SCons.
Now don’t get me wrong, SCons isn’t the answer to all build problems — but it’s quite a bit better than most build systems out there.
I’d suggest heading over to the SCons User Guide for a bit of background. The README bundled in trunk includes instructions specific to Fhtagn! But if you’re impatient, building Fhtagn! shouldn’t really be a lot more effort than running
scons on the command line.