Re: [PATCH v3 3/3] meson: generate trace events for qmp commands

[Markus Armbruster <armbru@redhat.com>]

Paolo Bonzini <pbonzini@redhat.com> writes:

> On 1/18/22 11:30, Markus Armbruster wrote:
>>> +# Please keep ordering between 'qapi' and 'trace' subdirs:
>>> +# We should first handle 'qapi' subdir, so that all
>>> +# generated trace events be generated prior handling 'trace'
>>> +# subdir.
>> I naively expect explicit dependencies to be used for ordering, but I'm
>> a Meson noob.  I'd like an ACK from a non-noob on this one.
>> 
>
> The Make-time dependencies are just fine, but still the Meson language
> is imperative (with generally immutable objects in order to avoid 
> aliasing horrors) and variables in Meson are all of the ":=" kind;
> there's no equivalent for Make's "=".  So you have to do
>
> 	subdir('qapi')
> 	subdir('trace')
>
> in this order so that the variables defined by qapi/ are found in trace/.
>
> Acked-by: Paolo Bonzini <pbonzini@redhat.com>
>
> but I would replace the comment with:
>
> # NOTE: the trace/ subdirectory needs the qapi_trace_events variable
> # that is filled in by qapi/.
>
> Paolo

Thanks!

Please also have a look at Vladimir's "supporting auto-generated trace
points for qga qmp commands requires some deeper refactoring" in reply
to PATCH 2.