[24.03 RFC 1/3] args: new library to allow easier manipulation of cmdline args

[Honnappa Nagarahalli]

<snip>

> 
> 02/11/2023 18:28, Bruce Richardson:
> > Add a new small library to make it easier for apps to work with
> > cmdline arguments and build up args to use when initializing EAL.
> >
> > This library is optional, and can be disabled at build time using the
> > disable libraries meson option.
> 
> This is an optional helper, so why not.
> 
> Another help for applications would be to allow initializing DPDK without the
> need of passing or building argc/argv arguments.
> I think we could add new functions rte_eal_init_*().
> Example:
> 	rte_eal_init_prepare()
> 	rte_eal_init_memory(memory parameters)
> 	rte_eal_init_devices(devargs)
> 	rte_eal_init_threads()
> 
> It should be possible to rebuild rte_eal_init() using above smaller functions to
> keep the big old rte_eal_init with argc/argv for compatibility.
We have to ensure these new APIs and argc/argv are in sync in future changes. For ex: if we add a new parameter to the API, we need a new argv. This is not a problem, but we have to do this manually.

>