Re: gcc 3.0.2/kernel details (-O issue)

From: Pavel Machek (pavel@suse.cz)
Date: Sat Dec 22 2001 - 15:54:58 EST


Hi!

> > It is interesting that 2.2 can be done with -O. Also I'd expect
> > errors during compilation and not silent crash...
>
> Well, you certainly won't get errors, because compiler optimizations
> shouldn't change expected syntax.
>
> -O2 is the standard optimization level for the kernel; everything is
> compiled via it. When developers test their code, nuances that the
> optimization introduce are accepted. Removing the optimization may
> break those expectations. Thus the kernel requires it.

Huh? Those expectations are *bugs*.

Kernel will not link without optimalizations because it *needs*
inlining. Any else dependency is a *bug*.
                                                                        Pavel

-- 
(about SSSCA) "I don't say this lightly.  However, I really think that the U.S.
no longer is classifiable as a democracy, but rather as a plutocracy." --hpa
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Sun Dec 23 2001 - 21:00:28 EST