[PATCH v2] build: check drivers class dependencies early

[Bruce Richardson]

On Tue, Aug 01, 2023 at 03:41:33PM +0200, David Marchand wrote:
> Drivers implementing a class of devices (for example, drivers/event)
> depend on the associated abstraction library (lib/eventdev).
> This dependency is expressed in the top level meson.build for this class
> (drivers/event/meson.build).
> 
> As we are making more libraries optional, custom constructs referencing
> the class dependencies in some drivers meson.build (event/dlb2) may break.
> 
> It would be possible to add more checks in those drivers meson.build but
> it is more straightforward to not even consider a driver meson.build when
> the class dependencies are not met.
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> Acked-by: Morten Brørup <mb at smartsharesystems.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>