[dpdk-dev] [dpdk-techboard] [PATCH 1/1] doc: add deprecation notice for CPU build flags

[Bruce Richardson]

On Wed, Aug 05, 2020 at 04:57:42PM +0200, Thomas Monjalon wrote:
> 05/08/2020 16:21, Bruce Richardson:
> > The RTE_MACHINE_CPUFLAGS_* macros in DPDK build just duplicate info from
> > the compiler macros, so we can remove them and just use the compiler
> > versions directly.
> > 
> > Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> > ---
> > --- a/doc/guides/rel_notes/deprecation.rst
> > +++ b/doc/guides/rel_notes/deprecation.rst
> > +* build macros: The macros defining RTE_MACHINE_CPUFLAG_* will be removed
> > +  from the build. The information provided by these macros is available
> > +  through standard compiler macros. For example, RTE_MACHINE_CPUFLAG_SSE3
> > +  duplicates the compiler-provided macro __SSE3__.
> 
> I see 2 advantages of having alias:
> 	- if 2 compilers differ, we can manage
> 	- we can find all such macros with grep RTE_MACHINE_CPUFLAG
>

Sure, if you think it's worthwhile keeping them, we can do so. It's just
right now they seem to be largely a waste of space. For #2, I'm not sure
when we would want to grep for them all, except possibly to remove them.
:-)