[RFC QEMU PATCH] ui: Make the DisplayType enum entries conditional

[Gerd Hoffmann]

On Wed, Jun 09, 2021 at 12:02:40PM +0200, Thomas Huth wrote:
> Libvirt's "domcapabilities" command has a way to state whether
> certain graphic frontends are available in QEMU or not. Originally,
> libvirt looked at the "--help" output of the QEMU binary to determine
> whether SDL was available or not (by looking for the "-sdl" parameter
> in the help text), but since libvirt stopped doing this analysis of
> the help text, the detection of SDL is currently broken, see:
> 
>  https://bugzilla.redhat.com/show_bug.cgi?id=1790902
> 
> QEMU should provide a way via the QMP interface instead. The simplest
> way, without introducing additional commands, is to make the DisplayType
> enum entries conditional, so that the enum only contains the entries if
> the corresponding CONFIG_xxx switches have been set.

Hmm, that'll break for the "dnf remove qemu-ui-sdl" case ...

take care,
  Gerd