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From: Robert Berger <xenomai.list@gmail.com>
To: Greg Gallagher <greg@embeddedgreg.com>
Cc: "Xenomai@xenomai.org" <xenomai@xenomai.org>
Subject: Re: xenomai 3.1/ipipe-core-4.19.128-cip28-arm-10.patch
Date: Wed, 8 Jul 2020 01:57:43 +0300	[thread overview]
Message-ID: <2ebbba9d-19be-86fe-59ee-6981f0dc5930@gmail.com> (raw)
In-Reply-To: <CALLqZ8REwJXSjZ4m3D3_VGdfgf66ZcG0_oWq0MajEn3jMCXQWw@mail.gmail.com>

Hi,

I just had a chat on the Yocto IRC and they claim, that I should not 
rebuild glibc against different kernel headers. That's yet another no no ;)

Which version of glibc do you use?

I have version 2.31.

01:38:11) RP: RobertBerger: one llbc can be run against multiple kernels 
and multiple kernel versions
(01:39:26) rber@freenode: Yep, but I thought it's built against a kernel 
version/some number of syscalls and you can upgrade the kernel 
underneath, but not downgrade
(01:40:26) rber@freenode: If you downgrade the kernel potentially 
syscalls are being called which are not available in the old kernel.
(01:41:27) RP: RobertBerger: that isn't how it works
(01:41:42) rber@freenode: Ah OK ;)
(01:41:50) rber@freenode: So you say it's a runtime thing?
(01:42:46) RP: RobertBerger: the libc adapts to the kernel version its 
running against. That kernel is in the range of "latest linux kernel 
when the libc was released" to OLDEST_KERNEL
(01:43:07) rber@freenode: OK

Regards,

Robert


  parent reply	other threads:[~2020-07-07 22:57 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-06 23:28 xenomai 3.1/ipipe-core-4.19.128-cip28-arm-10.patch Robert Berger
2020-07-06 23:49 ` Greg Gallagher
2020-07-07 10:06   ` Robert Berger
2020-07-07 16:30   ` Robert Berger
2020-07-07 17:48     ` Greg Gallagher
2020-07-07 21:12       ` Robert Berger
2020-07-07 22:57       ` Robert Berger [this message]
2020-07-07 23:04       ` Robert Berger
2020-07-08 12:41         ` Greg Gallagher
2020-07-08 21:19           ` Robert Berger
2020-07-09  3:55             ` Greg Gallagher
2020-07-13 17:08         ` Jan Kiszka
2020-07-13 22:00           ` Robert Berger
  -- strict thread matches above, loose matches on Subject: below --
2020-07-04 18:59 Robert Berger
2020-07-04 19:03 ` Robert Berger

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