Ubuntu 20.04 EOL

Ubuntu 20.04 EOL

[Stephen Hemminger]

Looks like Ubuntu 20.04 LTS (Focal Fossa) reached the end of standard support.
Should we drop it for DTS?

Asking because the recent patch to handle shadow warnings doesn't work on
compilers like Gcc 9.4 which don't know what -Wshadow is.

RE: Ubuntu 20.04 EOL

[Morten Brørup]

> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, 28 August 2025 06.35
> 
> Looks like Ubuntu 20.04 LTS (Focal Fossa) reached the end of standard support.

Paid support is available until May 2030:
https://ubuntu.com/blog/ubuntu-20-04-lts-end-of-life-standard-support-is-coming-to-an-end-heres-how-to-prepare

> Should we drop it for DTS?
> 
> Asking because the recent patch to handle shadow warnings doesn't work on
> compilers like Gcc 9.4 which don't know what -Wshadow is.

Our current minimum GCC compiler requirement is version 8.0:
https://git.dpdk.org/dpdk/tree/doc/guides/linux_gsg/sys_reqs.rst#n32

Which GCC version is required to support -Wshadow, and which GCC versions are included in relevant distros?

Maybe the -Wshadow can be added conditionally, depending on compiler version.
Shadow variables will not be caught locally, if using an old compiler version. But the CI will catch them in the tests running on recent compiler versions.

RE: Ubuntu 20.04 EOL

[Morten Brørup]

> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Thursday, 28 August 2025 06.35
> 
> Looks like Ubuntu 20.04 LTS (Focal Fossa) reached the end of standard support.

Paid support is available until May 2030:
https://ubuntu.com/blog/ubuntu-20-04-lts-end-of-life-standard-support-is-coming-to-an-end-heres-how-to-prepare

> Should we drop it for DTS?

I'm in favor of removing unsupported distros from the CI.
The lack of security updates could be a reason.

> 
> Asking because the recent patch to handle shadow warnings doesn't work on
> compilers like Gcc 9.4 which don't know what -Wshadow is.

Our current minimum GCC compiler requirement is version 8.0:
https://git.dpdk.org/dpdk/tree/doc/guides/linux_gsg/sys_reqs.rst#n32

Which GCC version is required to support -Wshadow, and which GCC versions are included in relevant distros?

Maybe the -Wshadow can be added conditionally, depending on compiler version.
Shadow variables will not be caught locally, if using an old compiler version. But the CI will catch them in the tests running on recent compiler versions.

Re: Ubuntu 20.04 EOL

[Stephen Hemminger]

On Thu, 28 Aug 2025 08:50:23 +0200
Morten Brørup <mb@smartsharesystems.com> wrote:

> > 
> > Asking because the recent patch to handle shadow warnings doesn't work on
> > compilers like Gcc 9.4 which don't know what -Wshadow is.  
> 
> Our current minimum GCC compiler requirement is version 8.0:
> https://git.dpdk.org/dpdk/tree/doc/guides/linux_gsg/sys_reqs.rst#n32
> 
> Which GCC version is required to support -Wshadow, and which GCC versions are included in relevant distros?
> 
> Maybe the -Wshadow can be added conditionally, depending on compiler version.
> Shadow variables will not be caught locally, if using an old compiler version. But the CI will catch them in the tests running on recent compiler versions.
> 


Meson handles that part fine. It is the Pragma logic that seems to confuse.
Working on doing it without pragma