From 01ce04375c3348fd683475e5aa5231149ef6a78a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Fri, 11 May 2018 14:27:02 +0200
Subject: [PATCH] build: require Jansson if QEMU driver is enabled
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If the QEMU driver was requested, require Jansson, since we need to use
the JSON monitor to probe capabilities for all QEMU version supported
by libvirt.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
---
 m4/virt-driver-qemu.m4 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/m4/virt-driver-qemu.m4 b/m4/virt-driver-qemu.m4
index ddb2834705..2d9992d0dc 100644
--- a/m4/virt-driver-qemu.m4
+++ b/m4/virt-driver-qemu.m4
@@ -27,6 +27,9 @@ AC_DEFUN([LIBVIRT_DRIVER_ARG_QEMU], [
 
 AC_DEFUN([LIBVIRT_DRIVER_CHECK_QEMU], [
   AC_REQUIRE([LIBVIRT_CHECK_JANSSON])
+  if test "$with_qemu:$with_jansson" = "yes:no"; then
+    AC_MSG_ERROR([Jansson >= 2.5 is required to build QEMU driver])
+  fi
   if test "$with_qemu" = "check"; then
     with_qemu=$with_jansson
   fi