Following some threads a while back on optimizing ssh
performance on sun4m systems, and after a few iterations i
ended up with "COPTS+=-O2 -mcpu=supersparc" in /etc/mk.conf

However, after looking through my 1.6 build logs, i have now
realized that this resulted in a whooping 50 lines or so
including the directives.. not exactly what i had in mind.

so which variables should i use instead?  CFLAGS (and
CXXFLAGS incidentally)?  Anything else/better suited?

(And am i just reading mk.conf(5) wrong or is it just
misleading about COPTS?)