out of tree driver builds broken with C++

[Thomas Monjalon]

15/02/2022 07:10, Tyler Retzlaff:
> On Mon, Feb 14, 2022 at 10:22:08AM +0100, Thomas Monjalon wrote:
> > 14/02/2022 10:13, Tyler Retzlaff:
> > > while the driver api is "internal" we agreed some time ago that drivers
> > > could be built external to the dpdk tree. by enabling the meson setup
> > > option -Denable_driver_sdk=true.
> > > 
> > > it was agreed that the driver api was internal and would attract no
> > > binary compatibility support which was fine.  this change has now
> > > imposed a further restriction that out of tree drivers have to be
> > > authored in C only as non-C++ compatible code will invariably leak into
> > > the internal structures.
> > > 
> > > you won't allow us to build C++ drivers in the dpdk tree and it seems
> > > now you are preventing building of C++ drivers outside of the tree too.
> > 
> > That's the problem of non-written assumptions, they are unknown or forgotten.
> > Did we agree to support out-of-tree drivers in C++?
> > 
> > We really need to make things clear and written in documentation.
> 
> how / where would you prefer this be documented?

I think we could add a general explanation about driver SDK
in doc/guides/contributing/design.rst