Re: [gentoo-amd64] Requesting advice on PIC and amd64

On Friday 21 October 2005 01:49, Bob Young wrote:
> I’m re-installing Gentoo64 yet-again on my dual Opteron box, this time I
> want to build with nptl and nptlonly use flags starting from stage1. ( <-
> I’ d welcome thoughts/opinions on this as well).
>
> In deciding on what other use flags I want, I noticed the pic flag, with
> it’ s accompanying warning of “Do not utilize this flag unless you know
> what you're doing.” So I figured I’d better do some research. I’ve read
> http://www.gentoo.org/proj/en/hardened/pic-guide.xml and
> http://www.gentoo.org/proj/en/hardened/pic-internals.xml. It seems that
> using PIC is primarily a security feature/enhancement. The box is a
> workstation, and has no public IP address, I’m more interested in
> performance than security, but if the PIC adds significant security without
> noticeably impacting performance on amd64, I’m wondering if adding the pic
> use flag in make.conf might be a good idea.

no it is not.
Almost all ebuilds, supporting the PIC flag, have it set, the rest should not 
use it.
>From what I remember, PIC on binaries make them a lot slower (and there is a
reason nvidia does not use it for their libs.

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