Optimization level 9 (-O9)? Thats a laugh. Read the GCC man page, the optimization levels are just groupings of other optimization flags (-O1, -O2, -O3, -O0, -Os), with optimization level 3 (-O3) containing the most optimization flags. The numbers don't correlate to any kind of optimization level (i.e. -O99 wouldn't be "99%" optimized or some equivilent malarky). The numbers might as well be letters like A, B, C.... In fact, if you know anything about programming, most of the -O3 flags and beyond become very code specific, and sometimes only work with programs written a certain way or run on certain processors. This just goes towards my general opinion that Gentoo users in general see gcc cflags as some kind of magic incantation and no little about their purpose, potential, or meaning. -funroll-loops anyone?
-Ryan Lynch On Monday 23 May 2005 05:09 pm, Colin <[EMAIL PROTECTED]> wrote: > On Monday 23 May 2005 05:09 pm, Colin <[EMAIL PROTECTED]> wrote: > > -O3: The highest performance optimization level before code starts to > > break. It goes up to -O9 if you're daring. (Use -Os to compile for > > size.) Implies a lot of stuff. -- gentoo-user@gentoo.org mailing list
