Re: [Qemu-devel] [PATCH v2 10/12] qapi: document DisplayType enum

[Gerd Hoffmann]

On Thu, Dec 20, 2018 at 08:46:13AM -0600, Eric Blake wrote:
> On 12/20/18 8:15 AM, Marc-André Lureau wrote:
> > Signed-off-by: Marc-André Lureau <address@hidden>
> > ---
> >   qapi/ui.json | 24 ++++++++++++++++++++++++
> >   1 file changed, 24 insertions(+)
> > 
> > diff --git a/qapi/ui.json b/qapi/ui.json
> > index 5ad13248d5..3f2f662dca 100644
> > --- a/qapi/ui.json
> > +++ b/qapi/ui.json
> > @@ -1075,6 +1075,30 @@
> >   #
> >   # Display (user interface) type.
> >   #
> > +# @default: The default user interface.
> 
> Any more hints on how this default is determined?  Is it a compile-time
> decision, based on what libraries were linked in?

Basically yes.  A bit more complicated due to modules.  gtk, sdl and
cocoa are checked, in that order.  And if none of them is available the
vnc server is enabled.

> Does the work on adding
> #if support to qapi make it introspectible what the default is?

Due to modules it isn't a compile time constant.  With a modular build
and gtk being packaged as separate sub-rpm the default depends on
whenever the sub-rpm is installed or not.

So I guess the answer is "no".

cheers,
  Gerd