Messages in this thread | | | Date | Sun, 19 Oct 2003 16:15:30 +0200 | From | "Ihar 'Philips' Filipau" <> | Subject | Re: [2.6 patch] add a config option for -Os compilation |
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Adrian Bunk wrote: > On Sat, Oct 18, 2003 at 07:10:22PM +0200, Ihar 'Philips' Filipau wrote: > >>Martin J. Bligh wrote: >>>If you have a puny 128K L2 cache, it might help, > > Martin was ironically talking about people who are ignorant of machines > with _huge_ caches. >
Oh. Sorry. Probably I need to work on my English bit more.
> I the context of this thread he wanted to vote for making -Os > conditionally and not unconditionally enabled by telling that he knows > of situations where -O2 produces faster code.
Absolutely. High-end toys, after all, optimized to handle this.
IMHO this should be settled on per-target basis: embedded system - -Os; servers - -O2; desktops - -O3 ;) So instead of CONFIG_EMBEDDED better to have CONFIG_TARGET=[desktop|server|embedded].
Inroducing one more variable into builds - is really painful. I was hit by gcc miscompiles and internal errors not once (especially with -O[23]). Tracking down this kind of issues would be made more problematic.
P.S. I'm really sorry for my rude response.
-- Ihar 'Philips' Filipau / with best regards from Saarbruecken. -- "... and for $64000 question, could you get yourself vaguely familiar with the notion of on-topic posting?" -- Al Viro @ LKML
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