linux-kernel - Re: Possibility of adding -march=native to x86

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <fc94aae90710251209n74e2cffbj2e3cdd321f36da0d@mail.gmail.com>
Date:	Thu, 25 Oct 2007 20:09:56 +0100
From:	"Michael Lothian" <mike@...eburn.co.uk>
To:	"Adrian Bunk" <bunk@...nel.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Possibility of adding -march=native to x86

Actually I changed the Makefile.cpu and changed the -march to native
which did slightly change the size of the kernel (slightly larger I
think)

So what else does that option change?

Mike

On 25/10/2007, Adrian Bunk <bunk@...nel.org> wrote:
> On Thu, Oct 25, 2007 at 07:33:35PM +0100, Michael Lothian wrote:
> > Hi
> >
> > I was wondering if it was possible to add -march=native support to the
> > processor options of the new x86 architecture if gcc 4.2 or greater is being
> > used.
> >
> > I'm not suggesting this should be a default at all, merely an extra option
> > similar to selecting P4, Athlon or even -Os.
> >
> > I've manually tried this flag at home with no ill effects.
>
> Selecting your CPU in the kernel configuration has more effects than
> just setting the gcc flag, so it wouldn't gain you anything since you
> anyway have to choose the correct CPU.
>
> > Mike
>
> cu
> Adrian
>
> --
>
>        "Is there not promise of rain?" Ling Tan asked suddenly out
>         of the darkness. There had been need of rain for many days.
>        "Only a promise," Lao Er said.
>                                        Pearl S. Buck - Dragon Seed
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/