Re: [SPAM] Re: Is there a minimum version requirement for glibc and GCC using EPICS

[Érico Nogueira Rolim via Tech-talk <tech-talk at aps.anl.gov>]

As another option, which we use at Sirius.

When deploying to a legacy environment where containers weren't an (good) option, and developing/building on the deployment environment wasn't possible because we wanted access to more modern C/C++ standards, updated libraries, etc, we used fully statically linked IOCs (instead of linking only EPICS libraries statically).

This doesn't work well on glibc, as has been extensively documented, but it works perfectly well on musl.

This depends on a yet unmerged epics-base PR, to support fully static linking: https://github.com/epics-base/epics-base/pull/413

And we use an Alpine-based container image to actually build the IOCs and package them into tarballs: https://github.com/cnpem/epics-in-docker/?tab=readme-ov-file#building-fully-static-iocs

Cheers,

Érico

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De: Tech-talk <tech-talk-bounces at aps.anl.gov> em nome de Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>
Enviado: segunda-feira, dezembro 23, 2024 12:50:21 AM
Para: Johnson, Andrew N. <anj at anl.gov>; Maren Purves <m.purves at eaobservatory.org>; shenzb at ihep.ac.cn <shenzb at ihep.ac.cn>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Assunto: Re: [SPAM] Re: Is there a minimum version requirement for glibc and GCC using EPICS

• Based on the information that you provide, I can only switch to a higher version of the Linux system as the OS in order to use the module I developed. Is my understanding correct?

Yes, if you develop on Ubuntu 22.04.1 then it won't run on CentOS 7.9.  But you do the opposite, develop on CentOS 7.9 and run on Ubuntu 22.04.1 it will normally work.

Mark

---

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Zhibang Shen via Tech-talk <tech-talk at aps.anl.gov>
Sent: Sunday, December 22, 2024 9:55 PM
To: Johnson, Andrew N. <anj at anl.gov>; Maren Purves <m.purves at eaobservatory.org>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: [SPAM] Re: Is there a minimum version requirement for glibc and GCC using EPICS

 

Hi,

 

Thank you for your help.

I develop and successfully run my code on Ubuntu 22.04.1 LTS.

The OS of the production environment is CentOS 7.9.

Based on the information that you provide, I can only switch to a higher version of the Linux system as the OS in order to use the module I developed. Is my understanding correct?

Best regards,

Zhibang

-----原始邮件-----
发件人: "Johnson, Andrew N." <anj at anl.gov>
发送时间: 2024-12-21 18:43:53 (星期六)
收件人: "Maren Purves" <m.purves at eaobservatory.org>, "shenzb at ihep.ac.cn" <shenzb at ihep.ac.cn>
抄送: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
主题: [SPAM] Re: Is there a minimum version requirement for glibc and GCC using EPICS

Hi,

In a general if you are running different versions of Linux on your systems, you have to compile the software on the oldest OS version that you want to run it on. This isn’t an EPICS restriction, newer GLIBC versions contain compatibility code so that programs compiled against older versions can still run against it, but the reverse can’t be done. Using Maren’s example, building your EPICS code on RHEL-5 should allow the result to also run on RHEL-6 and 7.

HTH,

- Andrew

__ 

Complexity is free, you pay for Simplicity

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Maren Purves via Tech-talk <tech-talk at aps.anl.gov>
Sent: Saturday, December 21, 2024 3:35:02 AM
To: shenzb at ihep.ac.cn <shenzb at ihep.ac.cn>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: Is there a minimum version requirement for glibc and GCC using EPICS

 

What is your operating system (in both systems)?

We (running CentOS5, 6, or 7), on different machines, some of which
probably aren't upgradable) have run into (not EPICS related, this is
for Chrome - none of the CentOS5 machines have Chrome, they're older
processing computers) :

Failed to build transaction:
google-chrome-stable-131.0.6778.204-1.x86_64 requires
libc.so.6(GLIBC_2.25)(64bit)

but installing that libc version would break the operating system on
those machines, so before you install a newer version of libc.so to
what it says you need you would have to check whether that would
require an operating system upgrade or possibly break the current one.

HTH, and aloha,
Maren Purves
Head of Instrument and Telescope Software
East Asian Observatory / JCMT


On Fri, Dec 20, 2024 at 4:59 PM Zhibang Shen via Tech-talk
<tech-talk at aps.anl.gov> wrote:
>
> Hi,
>
>
> I have developed a modbus protocol based motor submodule in my own environment. It is successfully compiled and running without any issue in my development setup.
>
>
> However, while migrating the module to the production environment, we encounter an error of low version library.
>
>
>
> [hp@localhost iocLeadshine]$ ./st.cmd
>
> ../../bin/linux-x86_64/leadshine: /usr/lib64/libc.so.6: version `GLIBC_2.34' not found (required by ../../bin/linux-x86_64/leadshine)
>
>
>
> The libc.so.6 can be found at directory /usr/lib64. It seems to be an issue that the glibc version is too low.
>
>
>
> [hp@localhost iocLeadshine]$ strings /usr/lib64/libc.so.6 | grep GLIBC_
>
> GLIBC_2.0
>
> GLIBC_2.1
>
> GLIBC_2.1.1
>
> GLIBC_2.1.2
>
> GLIBC_2.1.3
>
> GLIBC_2.2
>
> GLIBC_2.2.1
>
> GLIBC_2.2.2
>
> GLIBC_2.2.3
>
> GLIBC_2.2.4
>
> GLIBC_2.2.6
>
> GLIBC_2.3
>
> GLIBC_2.3.2
>
> GLIBC_2.3.3
>
> GLIBC_2.3.4
>
> GLIBC_2.4
>
> GLIBC_2.5
>
> GLIBC_2.6
>
> GLIBC_2.7
>
> GLIBC_2.8
>
> GLIBC_2.9
>
> GLIBC_2.10
>
> GLIBC_2.11
>
> GLIBC_2.12
>
> GLIBC_2.13
>
> GLIBC_2.14
>
> GLIBC_2.15
>
> GLIBC_2.16
>
> GLIBC_2.17
>
> GLIBC_PRIVATE
>
>
>
> Is there a minimum version requirement for glibc when using the synApps/motor package?
>
>
> We tried to compile the glibc from the source. But it is prompted that the gcc version is also not appropriate.
>
>
> As a reference, here are the version of the packages in the production environment.
>
>
> EPICS base 3.15.9
>
> asyn R4-41
>
> seq 2-2-5
>
> busy R1-7
>
> modbus R3-2
>
> motor R7-1
>
>
>
> Best regards,
>
> Zhibang

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