Re: [gentoo-user] march cflag for Intel Pentium Dual-Core E2160 SLA8Z Malay processor

[Jack <ostroffjh@users.sourceforge.net>]

On 9/19/18 5:45 PM, gevisz wrote:
> вт, 18 сент. 2018 г. в 22:44, George Kettleborough <kettleg@gmail.com>:
>> If you can run gcc on the new system first you can find out what flags
>> -march=native would produce and use those. See:
>> https://blogs.gentoo.org/mgorny/2014/06/23/inlining-marchnative-for-distcc/
> Thank you for the link.
>
> It would be useful if I had an access to the target computer and decided
> to set up distcc. May be I would. In the future. However, currently, I don't
> have access to the target computer and hope to get without such an access.
> Just with the full name of the processor and the output of lspci command
> run on the target computer, which I got only a few minutes ago.
> The corresponding image is attached to this e-mail.
>> On Tue, 18 Sep 2018 at 08:24, gevisz <gevisz@gmail.com> wrote:
>>> Currently, I am prepairing to build Gentoo system on
>>> computer with AMD Athlon 64 X2 for computer with
>>> Intel Pentium Dual-Core E2160 SLA8Z Malay processor.
>>>
>>> What will be the correct march cflag for Intel Pentium
>>> Dual-Core E2160 SLA8Z Malay processor to set up in
>>> make.conf ?
>>>
>>> Am I right to use amd64 stage3 for Intel Pentium
>>> Dual-Core E2160 SLA8Z Malay processor?
>>>
>>> Thank you in advance.

Unless I'm missing something, I'm surprised nobody has mentioned one 
potential problem.  Unless you are careful, code you compile for an AMD 
may not run on an Intel.  If you are just going to compile binary 
packages to move and install, this might be OK (assuming you don't trip 
over trying to run test during a build.) You should be able to come up 
with settings so compiled code will run on either architecture, but I 
have no idea what the side effects might be, such as larger and/or less 
efficient code.  I almost wonder if this doesn't count as 
cross-compiling, even though it is not a totally incompatible 
architecture.  Hopefully someone can either expand on this, or tell me 
why I'm barking up the wrong tree.

Jack