[RFC v2] eal: provide option to use compiler memcpy instead of RTE

[Stephen Hemminger]

On Tue, 28 May 2024 18:03:27 +0200
Mattias Rönnblom <hofors at lysator.liu.se> wrote:

> > Lets go farther.
> > 
> > 1. Announce that rte_memcpy will be marked deprecated in 24.11 release
> > 
> > 2. In 24.11 do a global replace of rte_memcpy on the tree.
> >     And mark rte_memcpy as deprecated.
> > 
> > 3. In 25.11 it can go away.  
> 
> If/when rte_memcpy.h is just a tiny memcpy() wrapper, the maintenance 
> burden is pretty much eliminated.
> 
> Keeping it around will allow for older applications to compile against 
> newer DPDK version.
> 
> You can always discourage its use in the API documentation.
> 
> Also, hopefully, some day, we will have a non-temporal memcpy(), and 
> those functions needs a home.

I was thinking a wrapper but have it marked __rte_deprecated so that
warnings result and people are motivated to fix.