[lfs-dev] LFS and 32-bit systems

Douglas R. Reno renodr2002 at gmail.com
Sun Dec 11 15:25:52 PST 2016


On Sun, Dec 11, 2016 at 5:11 PM, Bruce Dubbs <bruce.dubbs at gmail.com> wrote:

> akhiezer wrote:
>
>> From: Bruce Dubbs <bruce.dubbs at gmail.com>
>>> Date: Sun, 11 Dec 2016 11:29:42 -0600
>>> Subject: [lfs-dev] LFS and 32-bit systems
>>>
>>> Do any of you still have a 32-bit Intel system that you use to test/run
>>> LFS?
>>>
>>
>>
>> 'Yes', nine different 32-bit machines; plus three 64-bit running 32-bit
>> os.
>>
>> *BUT*, these are for not-by-the-books builds: instead, they're for
>> builds/tests that derive in parts from the books.
>>
>>
>>
>>> I am thinking about rewriting the LFS preface section on architecture to
>>> say:
>>>
>>> The primary target architecture of LFS is the AMD/Intel x86_64 (64-bit)
>>> CPU. In addition instructions are included that allow a build on older
>>> 32-bit Intel CPUs, but testing is not regularly done on that
>>> architecture.
>>>
>>
>>
>> s/regularly done/done regularly/
>>
>
> Minor, but OK.
>
> The instructions in this book are also known to work, with some
>>> modifications, with the Power PC and ARM CPUs.  ...
>>>
>>> I would then remove the second and third paragraphs and the small table
>>> between them.
>>>
>>>
>>
>> Both paras and table are ok to leave in, until as/when 32-bit is
>> dropped altogether.
>>
>
> When I originally did that, the stats were from a Core2Duo as documented.
> Even that is a bit long-in-the-tooth.  I don't know how valid that
> comparison is today.
>
> It may be useful/'nice' to include stats from recent by-the-book 32-/64-
>> bit (properly-comparable) builds.
>>
>
> I could do that if I had the stats.  I don't have a reasonable way to
> compare today.  I don't think giving numbers for a 3.3 GHz i7-5820K really
> is a good platform for the stats.
>
> My latest build took 64 minutes (vice Core2 at 190.6 minutes), but that
> was at -j8 and omitted some, but not all tests in chapter 6.
>
>   -- Bruce
>

I can remotely wake up my Core2 if you want those stats (same system, not
much has changed). I have a Xeon-based system here already with a 2.6 GHz
CPU with 4 cores if you want those instead.
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