[PATCH v2] build: announce requirement for C11

[Tyler Retzlaff]

On Thu, May 04, 2023 at 09:48:59AM +0100, Bruce Richardson wrote:
> On Thu, May 04, 2023 at 09:50:09AM +0200, Mattias Rönnblom wrote:
> > 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)?
> > 
> I assume we only need mandatory + atomics, however perhaps someone more
> knowledgable about what the optional parts of the spec are, can correct me
> on this. Once clarified, I maybe should reword this yet again to call it
> out even more specificallly.

mandatory + atomics, no more than that.

so -std=c11 and __STDC_NO_ATOMICS__ is not defined, that is all.

> 
> /Bruce