Emil Velikov (12022-07-19):
> As you may know the libva* set of libraries share an internal ABI
> between them. In a resent libva commit, the va_fool API was removed.
> 
> Thus if one is to mix different versions of libva.so and libva-x11.so
> they will get an error, leading to a crash of the whole stack.
> 
> The simple solution is

... a configure check.

If the person who installs replaces a library with another, it is their
responsibility to check they are compatible.

Regards,

-- 
  Nicolas George