[gentoo-user] CHOST="i486-pc-linux-gnu" ?

[gentoo-user] CHOST="i486-pc-linux-gnu" ?

[Grant]

I'm installing Gentoo on an Acer Aspire 110.  It's one of the
"netbook" laptops.  /etc/make.conf says:

CHOST="i486-pc-linux-gnu"

Is that correct?

- Grant

[gentoo-user] Re: CHOST="i486-pc-linux-gnu" ?

[Nikos Chantziaras]

Grant wrote:
> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
> "netbook" laptops.  /etc/make.conf says:
> 
> CHOST="i486-pc-linux-gnu"
> 
> Is that correct?

If it's an Intel-compatible (x86) and Gentoo is 32-bit, then yes, that's 
correct.

Re: [gentoo-user] Re: CHOST="i486-pc-linux-gnu" ?

[Grant]

>> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
>> "netbook" laptops.  /etc/make.conf says:
>>
>> CHOST="i486-pc-linux-gnu"
>>
>> Is that correct?
>
> If it's an Intel-compatible (x86) and Gentoo is 32-bit, then yes, that's
> correct.

OK, does i686 indicate 64-bit?

- Grant

Re: [gentoo-user] Re: CHOST='i486-pc-linux-gnu' ?

[Jesús Guerrero]

El Lun, 2 de Febrero de 2009, 6:54, Grant escribió:
>>> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
>>> "netbook" laptops.  /etc/make.conf says:
>>>
>>>
>>> CHOST="i486-pc-linux-gnu"
>>>
>>>
>>> Is that correct?
>>>
>>
>> If it's an Intel-compatible (x86) and Gentoo is 32-bit, then yes,
>> that's correct.
>
> OK, does i686 indicate 64-bit?

Nope. i686 is still x86.

But that's the lesser of your problems. If you really meant
to install a 64 bits Gentoo, and your make.conf has that CHOST
line, that means that you chose the wrong stage3 file, and
maybe also the wrong livecd. You need a 64 bits livecd and a
64 bits stage3.

-- 
Jesús Guerrero

[gentoo-user] Re: CHOST="i486-pc-linux-gnu" ?

[Nikos Chantziaras]

Grant wrote:
>>> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
>>> "netbook" laptops.  /etc/make.conf says:
>>>
>>> CHOST="i486-pc-linux-gnu"
>>>
>>> Is that correct?
>> If it's an Intel-compatible (x86) and Gentoo is 32-bit, then yes, that's
>> correct.
> 
> OK, does i686 indicate 64-bit?

No.  64-bit is "x86_64-pc-linux-gnu".  I don't know why you have i486 
instead of i686, but I do know that i486 is correct too.  If it has any 
drawbacks compared to i686, no idea.

Re: [gentoo-user] Re: CHOST='i486-pc-linux-gnu' ?

[Grant]

>>>> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
>>>> "netbook" laptops.  /etc/make.conf says:
>>>>
>>>>
>>>> CHOST="i486-pc-linux-gnu"
>>>>
>>>>
>>>> Is that correct?
>>>>
>>>
>>> If it's an Intel-compatible (x86) and Gentoo is 32-bit, then yes,
>>> that's correct.
>>
>> OK, does i686 indicate 64-bit?
>
> Nope. i686 is still x86.
>
> But that's the lesser of your problems. If you really meant
> to install a 64 bits Gentoo, and your make.conf has that CHOST
> line, that means that you chose the wrong stage3 file, and
> maybe also the wrong livecd. You need a 64 bits livecd and a
> 64 bits stage3.

It's a 32-bit CPU.  I'm just confused as to why it doesn't qualify as
a 686 instead of 486.

- Grant

Re: [gentoo-user] Re: CHOST='i486-pc-linux-gnu' ?

[Jesús Guerrero]

El Lun, 2 de Febrero de 2009, 7:12, Grant escribió:
>> But that's the lesser of your problems. If you really meant
>> to install a 64 bits Gentoo, and your make.conf has that CHOST line, that
>> means that you chose the wrong stage3 file, and maybe also the wrong
>> livecd. You need a 64 bits livecd and a 64 bits stage3.
>>
>
> It's a 32-bit CPU.  I'm just confused as to why it doesn't qualify as
> a 686 instead of 486.

It does qualify as 686. Anything from pentium pro and above (if
my memory serves correctly) does qualify as i686. Of course, previous
arches up to i386 will work as well, since the new ones are all
supersets of the original i386 instructions set.

So, you could use either. But i686 will be more optimal.

However, make sure you check the guide if you plan to change
the CHOST. It's not just as straight as changing it on your
make.conf

http://www.gentoo.org/doc/en/change-chost.xml

-- 
Jesús Guerrero

Re: [gentoo-user] CHOST="i486-pc-linux-gnu" ?

[Stroller]

On 2 Feb 2009, at 04:32, Grant wrote:

> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
> "netbook" laptops.  /etc/make.conf says:
>
> CHOST="i486-pc-linux-gnu"
>
> Is that correct?

This thread has gotten confusing. If you mean the Acer Aspire One  
netbook (of which the A110 is a sub-model) then it uses an Intel Atom  
N270 processor.

http://en.wikipedia.org/wiki/Aspire_One


It appears to be i686 & Gentoo wiki alleges the safe CFLAGS thusly:
    CHOST="i686-pc-linux-gnu"
    CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer"
    CXXFLAGS="${CFLAGS}"

http://en.gentoo-wiki.com/wiki/Safe_Cflags/Intel#Atom_N270

(This took me 2 minutes on Google).

Stroller.

Re: [gentoo-user] CHOST="i486-pc-linux-gnu" ?

[AllenJB]

Hi,

It looks like you've probably used the "x86" stage3 tarball instead of 
the "i686" one. While you can change it [0], the best option is probably 
to start again using the correct tarball.

Note that if you do want to change CHOST, you _MUST_ follow the guide[0] 
or you will end up with problems.

[0] http://www.gentoo.org/doc/en/change-chost.xml

AllenJB

Grant wrote:
> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
> "netbook" laptops.  /etc/make.conf says:
> 
> CHOST="i486-pc-linux-gnu"
> 
> Is that correct?
> 
> - Grant
> 

Re: [gentoo-user] CHOST="i486-pc-linux-gnu" ?

[Grant]

> It looks like you've probably used the "x86" stage3 tarball instead of the
> "i686" one. While you can change it [0], the best option is probably to
> start again using the correct tarball.
>
> Note that if you do want to change CHOST, you _MUST_ follow the guide[0] or
> you will end up with problems.
>
> [0] http://www.gentoo.org/doc/en/change-chost.xml

Thanks a lot, I read somewhere that I should not change my CHOST so I
was trying to figure out what was going on as opposed to figuring out
how to change it.

- Grant

>> I'm installing Gentoo on an Acer Aspire 110.  It's one of the
>> "netbook" laptops.  /etc/make.conf says:
>>
>> CHOST="i486-pc-linux-gnu"
>>
>> Is that correct?
>>
>> - Grant

[gentoo-user] Re: CHOST='i486-pc-linux-gnu' ?

[James]

Grant <emailgrant <at> gmail.com> writes:


> >>>> CHOST="i486-pc-linux-gnu"

> It's a 32-bit CPU.  I'm just confused as to why it doesn't qualify as
> a 686 instead of 486.


Run:
cat /proc/cpuinfo
to be certain about the cpu.  YOu can usually do this with any boot/install
disk, prior to installation.


James

Re: [gentoo-user] CHOST="i486-pc-linux-gnu" ?

[Florian Philipp]

AllenJB schrieb:
> Hi,
> 
> It looks like you've probably used the "x86" stage3 tarball instead of 
> the "i686" one. While you can change it [0], the best option is probably 
> to start again using the correct tarball.
> 
> Note that if you do want to change CHOST, you _MUST_ follow the guide[0] 
> or you will end up with problems.
> 
> [0] http://www.gentoo.org/doc/en/change-chost.xml
> 

Is there any drawback from an i486 CHOST when -march settings indicate 
an i686? Does it produce slower code?