diff options
author | Thomas Huth <thuth@redhat.com> | 2021-06-15 11:04:39 +0200 |
---|---|---|
committer | Gerd Hoffmann <kraxel@redhat.com> | 2021-06-23 14:42:30 +0200 |
commit | 66c2207fd28a6025792fbb75151ee848b911dc35 (patch) | |
tree | 5815e6844de7e74f9b6c04eb78be057e886ef587 /softmmu/vl.c | |
parent | ddc717581c2ea45c38423d24f2157572c73b8e75 (diff) |
ui: Make the DisplayType enum entries conditional
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. A simple 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. This of course
only gives an indication which possibilities have been enabled during
compile-time of QEMU (and does not take into account whether modules
are later available or not for example - for this we'd need a separate
command), but anyway, this should already be good enough for the above
bug ticket, and it's a good idea anyway to make the QMP interface
conditional here, so let's simply do it.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210615090439.70926-1-thuth@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'softmmu/vl.c')
-rw-r--r-- | softmmu/vl.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/softmmu/vl.c b/softmmu/vl.c index feb4d201f3..d99e2cbdbf 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -1068,6 +1068,7 @@ static void parse_display(const char *p) * Not clear yet what happens to them long-term. Should * replaced by something better or deprecated and dropped. */ +#if defined(CONFIG_SDL) dpy.type = DISPLAY_TYPE_SDL; while (*opts) { const char *nextopt; @@ -1131,6 +1132,10 @@ static void parse_display(const char *p) } opts = nextopt; } +#else + error_report("SDL display supported is not available in this binary"); + exit(1); +#endif } else if (strstart(p, "vnc", &opts)) { /* * vnc isn't a (local) DisplayType but a protocol for remote @@ -1867,13 +1872,22 @@ static void qemu_apply_machine_options(void) static void qemu_create_early_backends(void) { MachineClass *machine_class = MACHINE_GET_CLASS(current_machine); +#if defined(CONFIG_SDL) + const bool use_sdl = (dpy.type == DISPLAY_TYPE_SDL); +#else + const bool use_sdl = false; +#endif +#if defined(CONFIG_GTK) + const bool use_gtk = (dpy.type == DISPLAY_TYPE_GTK); +#else + const bool use_gtk = false; +#endif - if ((alt_grab || ctrl_grab) && dpy.type != DISPLAY_TYPE_SDL) { + if ((alt_grab || ctrl_grab) && !use_sdl) { error_report("-alt-grab and -ctrl-grab are only valid " "for SDL, ignoring option"); } - if (dpy.has_window_close && - (dpy.type != DISPLAY_TYPE_GTK && dpy.type != DISPLAY_TYPE_SDL)) { + if (dpy.has_window_close && !use_gtk && !use_sdl) { error_report("-no-quit is only valid for GTK and SDL, " "ignoring option"); } |