[lttng-dev] Patches to enable building on CentOS 5.x (glibc 2.5)

[yin sun]

Support lower version of glibc does provide value. In my case, it will
enable me easily port to existing production system, which is always
several versions behind.

Thanks,
/Yin

On Thu, May 16, 2013 at 11:52 PM, David OShea <David.OShea at quantum.com> wrote:
> Hi Yannick,
>
>
>
> Yes, we patched the latest (as of around a month ago) versions to work on
> CentOS 5.  Sorry, I neglected to mention that this is for UST only, not
> kernel tracing, hence my not saying anything about the modules!
>
>
>
> If the changes aren’t going to go upstream into the git repositories, I
> imagine there is more chance of the CentOS 5 support becoming broken –
> something could be committed upstream that requires further patching, or
> conflicts with the patches.  In this case, then, I don’t think EPEL packages
> would help us much, and quite possibly nobody else is interested in CentOS 5
> :)  Also, we needed to backport some lttng-ust commits from master to get
> support for dynamic trace providers to work, so we’re more interested in
> seeing future releases include the changes than seeing a patched version of
> the current release, and therefore I don’t think there would be any value in
> us moving to an EPEL package for the same version of LTTng that we’re
> already using.
>
>
>
> I can certainly provide the patches to you anyway, but I’m not so keen to
> spend time improving them if they’re not going upstream, e.g. one thing I
> think needs to be investigated is whether the kernel versions provided by
> CentOS 5 include the system calls that we had to add wrappers for; I haven’t
> paid any attention to what kernel version I’m using, I’m not sure if it is a
> standard CentOS 5 one.
>
>
>
> Thanks!
> David
>
>
>
>
>
> From: Brosseau, Yannick [mailto:yannick.brosseau at gmail.com]
> Sent: Friday, 17 May 2013 12:44 AM
> To: David OShea
> Cc: lttng-dev at lists.lttng.org
> Subject: Re: [lttng-dev] Patches to enable building on CentOS 5.x (glibc
> 2.5)
>
>
>
> Hi,
>
> So you made it work with CentOS 5?
>
> I don't know if we want it upstream, but I could maybe use them to build a
> package for EPEL5.
>
> Yannick
>
>
>
> On Wed, May 15, 2013 at 7:38 AM, David OShea <David.OShea at quantum.com>
> wrote:
>
> Hi,
>
> Would contributions of patches to enable lttng-tools and lttng-ust to build
> with glibc 2.5 (as is shipped with CentOS 5.x) and to enable lttng-gen-tp to
> run with Python 2.4 (as shipped on CentOS 5.x) be accepted?
>
> What is missing from glibc 2.5 is:
>
> - a system call wrapper for sched_getcpu()
> - a system call wrapper for sync_file_range()
> - htobe32() and other similar endian conversion functions
>
> babeltrace and userspace-rcu did not require patching.
>
> Thanks in advance,
> David
>
> P.S. If you see this, thanks for all your recent replies, Mathieu, I will
> try to get back to you soon!
>
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> --
> Yannick Brosseau
> yannickbrosseau.com
>
>
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