I agree with removing most of the optimization overrides. I routinely build good systems with with O3pipe_march as default (every package) with only a single override: binutils. Binutitls will not build for me using O3 so I created another mode called O2pipe_march which works great. Mind you, I'm not running any test suites so I don't know which ones are failing, but the complete system runs fine. Therefore it stands to good reason that a user following the book will not need optimization at all. And if a user does want them, it should follow that they will want it for every package except those that that they specify. (Make them figure it out.) Also, I have little free time at the moment, but I am/was working on a way to make job control configurable instead of hard coded. I work on 4 different workstations throughout the day so I can't effectively use svn to store my changes. That's the reason I suggested moving to github so that anyone can fork and do work when they can without disrupting everyone else.
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