Re: [2.6 patch] add a config option for -Os compilation

[Ihar 'Philips' Filipau]

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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