Since this topic keeps coming up in other threads I'll chime in with my
$0.01 here.  We've been using CentOS 7 for awhile (and working on migrating
off) but have had to leverage devtoolset/llvmtoolset for various reasons.
I remember a discussion of installing a different compiler coming up but
don't remember which thread that was in/what the outcome was.  While I'd
like to just brush over C7 and say there is a compatible compiler available
so just make the change I also realize that making that change could be
quite disruptive to existing code bases.

However, the 22.11 LTS will be EOL in Nov 2024.  CentOS 7 is EOL Jun 2024.
For the 23.x series and going forward I don't think starting with a C11
requirement is an unreasonable ask.

On Thu, Jan 12, 2023 at 6:36 AM Bruce Richardson <bruce.richardson@intel.com>
wrote:

> Traditionally, DPDK has never specified a minimum C standard used either
> in DPDK builds or for applications using DPDK. Following discussion
> on-list about C standards, this RFC attempts to start the process of
> codifying what our standards expectations are. No code changes are made
> by this RFC, instead only the build parameters are changed to explicitly
> specify:
>
> * C99 standard is used to build DPDK itself. This is supported by all
>   supported compiler versions of GCC and Clang.
> * The headers are checked for compatibility with gcc89 standard, which
>   was the default standard used by the oldest supported version of GCC.
>   DPDK headers do not build with the official C89 standard, and, to the
>   best of my knowledge, have never done so.
>
> Bruce Richardson (1):
>   build: increase minimum C standard for DPDK builds
>
>  buildtools/chkincs/meson.build | 1 +
>  meson.build                    | 1 +
>  2 files changed, 2 insertions(+)
>
> --
> 2.37.2
>
>