[PATCH v2] build: announce requirement for C11

[Mattias Rönnblom]

On 2023-05-03 19:30, Bruce Richardson wrote:
> Add a deprecation notice informing users that we will require a C11
> compiler from 23.11 release onwards. This requirement was agreed by
> technical board to enable use of newer C language features, e.g.
> standard atomics. [1]
> 
> [1] http://inbox.dpdk.org/dev/DBAPR08MB58148CEC3E1454E8848A938998AB9@DBAPR08MB5814.eurprd08.prod.outlook.com/
> 
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> Acked-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
> 
> ---
> 
> V2:
> - add requirement for stdatomics
> - fix sphinx formatting
> ---
>   doc/guides/rel_notes/deprecation.rst | 9 +++++++++
>   1 file changed, 9 insertions(+)
> 
> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
> index dcc1ca1696..70c6019d26 100644
> --- a/doc/guides/rel_notes/deprecation.rst
> +++ b/doc/guides/rel_notes/deprecation.rst
> @@ -11,6 +11,15 @@ here.
>   Deprecation Notices
>   -------------------
>   
> +* C Compiler: From DPDK 23.11 onwards,
> +  building DPDK will require a C compiler which supports the C11 standard,
> +  including support for C11 standard atomics.

The whole of C11, or just the mandatory parts (+atomics)?

> +
> +  Please note:
> +
> +  * C11 is supported from GCC version 5 onwards, and is the default language version in that release
> +  * C11 is the default compilation mode in Clang from version 3.6
> +
>   * kvargs: The function ``rte_kvargs_process`` will get a new parameter
>     for returning key match count. It will ease handling of no-match case.
>