Re: gcc 3.0.2/kernel details (-O issue)
H. Peter Anvin (hpa@zytor.com)
19 Dec 2001 19:39:25 -0800
Followup to: <20011220001006.GA18071@arthur.ubicom.tudelft.nl>
By author: Erik Mouw <J.A.K.Mouw@its.tudelft.nl>
In newsgroup: linux.dev.kernel
>
> It doesn't change syntax, but anything lower than -O1 simply doesn't
> inline functions with an "inline" attribute. The result is that the
> inline functions in header files won't get inlined and the compiler
> will complain about missing functions at link time (or module insert
> time).
>
> I'm actually surprised that 2.2 can be compiled with -O, AFAIK
> linux-2.2 also has a lot of inline functions in headers. I know from
> experience that -Os works for 2.4 kernels on ARM, I haven't tested it
> with 2.2 or x86.
>
-O is -O1. If you turn on the optimizer at all you get inlining.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
-
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/