Re: git: c8c2d4f22536 - main - lang/python3: allow using LTO on powerpc64

Am 26.02.23 um 14:50 schrieb Jan Beich:
> Matthias Andree <matthias.andree@tu-dortmund.de> writes:
> 
>> Am 24.02.23 um 16:48 schrieb Piotr Kubaj:
>>
>>> The branch main has been updated by pkubaj:
>>> URL:
>>> https://cgit.FreeBSD.org/ports/commit/?id=c8c2d4f2253694802ef720f098c57800570ad2fc
>>> commit c8c2d4f2253694802ef720f098c57800570ad2fc
>>> Author:     Piotr Kubaj <pkubaj@FreeBSD.org>
>>> AuthorDate: 2023-02-24 15:48:16 +0000
>>> Commit:     Piotr Kubaj <pkubaj@FreeBSD.org>
>>> CommitDate: 2023-02-24 15:48:16 +0000
>>>       lang/python3: allow using LTO on powerpc64
>>>            It was recently fixed and will be available in
>>> 13.2-RELEASE.
>>>       Since LTO is not enabled by default, it's ok to make it available.
>>
>> Careful. LTO causes EXCESSIVE memory use for the build.
>> I've had to disable it for a low-memory server I operate (amd64 based,
>> but that's the LTO feature itself, not the CPU).
> 
> Are you sure 570Mb RAM is EXCESSIVE for amd64 ? For example,

I certainly could not build the default Python a few months ago on 1 GB 
RAM + 1 GB swap. Possibly this was allowing a small number of jobs (like 
2 or 3) on a single-core vServer.

For the big things (compilers) you want some parallelism because half a 
dozen threads is better than just 1. Especially on server-class hardware 
which has low clock rates and many cores.