[PATCH] qemu: domain: raise an error when no emulator is found

[Cole Robinson <crobinso@xxxxxxxxxx>]

$ cat f | grep -e arch -e emulator
    <type arch='mipsel'>hvm</type>
$ sudo virsh define f
error: Failed to define domain from f
error: An error occurred, but the cause is unknown

After:
$ sudo virsh define f
error: Failed to define domain from f
error: unsupported configuration: No emulator found for arch 'mipsel'

Signed-off-by: Cole Robinson <crobinso@xxxxxxxxxx>
---
 src/qemu/qemu_domain.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index a15364a71e..6f53e17b6a 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -4687,8 +4687,12 @@ qemuDomainDefPostParseBasic(virDomainDefPtr def,
     /* check for emulator and create a default one if needed */
     if (!def->emulator) {
         if (!(def->emulator = virQEMUCapsGetDefaultEmulator(
-                  driver->hostarch, def->os.arch)))
+                  driver->hostarch, def->os.arch))) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                           _("No emulator found for arch '%s'"),
+                           virArchToString(def->os.arch));
             return 1;
+        }
     }
 
     return 0;
-- 
2.23.0

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