I built an "optimized" Crux 2.4 using the following parameters: export CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" export CXXFLAGS="${CFLAGS}" export MAKEFLAGS="-j3" I then built core, opt and xorg and mastered an iso image per these instructions: http://article.gmane.org/gmane.linux.distributions.crux.general/2561/match=i... The new system is up and running fine. I'd like to do it this way instead: http://crux.nu/Public/BuildingISO (the git pull must be done inside the iso dir, btw) but I could use more up to date instructions. Anyone have an "official" list of commands that will cause the git sources to build? I've had success with some that I could figure out: make kernel (custom for my hardware) make core make opt (pruned to match the crux iso) make xorg (pruned to match my video hardware) but not with make bootstrap make iso etc. Thanks, Chris Any, yes, I realize that my "tuning" probably did little or nothing; in fact I've probably just wasted many hours on a worthless endeavor. But, sometimes you've just got to prove things to yourself the hard way. The joke is REALLY on me if -march-prescott is indeed identical to -march=i686 :)