Re: [gentoo-amd64] Re: Re: x86_64 optimization patches for glibc.

[Nuitari <nuitari@melchior.nuitari.net>]

Same here for the USE flags.

I'm also starting to get used to these kinds of problems with mod_php & 
apache.

On Sun, 31 Jul 2005, Jared Lindsay wrote:

> Date: Sun, 31 Jul 2005 11:46:59 -0700
> From: Jared Lindsay <cinder.sub@gmail.com>
> Reply-To: gentoo-amd64@lists.gentoo.org
> To: gentoo-amd64@lists.gentoo.org
> Subject: Re: [gentoo-amd64] Re: Re: x86_64 optimization patches for glibc.
> 
> Yeah, netcat, hehe.
>
> emerge -pv netcat
> ...
> [ebuild  N    ] net-analyzer/netcat
> [110-r8]                       -GAPING_SECURITY_HOLE +crypt -ipv6
> -static 107 kB
>
> I would be interested in a USE flag for this glibc patch.
>
> On 7/31/05, Ben Skeggs <darktama@iinet.net.au> wrote:
>> Duncan wrote:
>>
>>> Brian Hall posted <20050731085600.65fc8657.brihall@pcisys.net>, excerpted
>>> below,  on Sun, 31 Jul 2005 08:56:00 -0600:
>>>
>>>
>>>
>>>> Perhaps a USE flag could be created to enable the glibc patches, then a
>>>> emerge --newuse could recompile glibc and the problem apps (or
>>>> everything); maybe a mini-howto document would also be helpful.
>>>>
>>>> I would certainly like an easy way to enable any "free" performance
>>>> boost I can get!
>>>>
>>>>
>>>
>>> Something like USE=dangerous-amd64-hack? <g>
>>>
>>> (Seriously, there at least used to be a local use flag
>>> USE=frickin-big-security-hole, or some such, on some app I can't remember
>>> at the moment.  Turns out a teacher was using that app in his class as a
>>> an example or something, so the dev left the ability to create it there,
>>> but with a USE flag nobody in their right mind would normally enable.  I
>>> wish I could remember what it was, but grepping use.local.desc for
>>> anything that might be related doesn't seem to bring it up.  Perhaps the
>>> app, or anyway the USE flag, has now been removed from portage?)
>>>
>>> The use.local.desc description could point to the bug, which is IIRC what
>>> the one above did, for those wanting more information about just why such
>>> a USE flag exists, and just why someone might be persuaded to enable it.
>>>
>>>
>>>
>> Are you talking about GAPING_SECURITY_HOLE?  If so, this flag is still
>> in use by the net-analyzer/netcat package.  It enables the "-E" (iirc)
>> switch
>> which allows you to do something like:
>>        nc -l -p 12345 -E /bin/bash
>>
>> This(or something close to it) would cause netcat to listen on port 12345,
>> and forward the person who connects to it a nice bash shell.
>>
>> Ben.
>> --
>> gentoo-amd64@gentoo.org mailing list
>>
>>
>
>
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