a11y: add runtime checking for xcb only calls

This amends d23562da1c4cb525d4012bee55bd665c6cafef04 .

Task-number: QTBUG-117535
Change-Id: I33f97f3c26409a33c8a069f9dcdfe61bbd88e2ec
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit 7e14e6c2d3bb5297eefa273d5a23836c931c7517)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit efbcd597955d19abe838b4f9b544e41aed324214)

1 files changed, 7 insertions, 5 deletions

diff --git a/src/gui/accessible/linux/dbusconnection.cpp b/src/gui/accessible/linux/dbusconnection.cpp
index b4a8643474..10bd10927e 100644
--- a/src/gui/accessible/linux/dbusconnection.cpp
+++ b/src/gui/accessible/linux/dbusconnection.cpp
@@ -56,11 +56,13 @@ DBusConnection::DBusConnection(QObject *parent)
     if (c.interface()->isServiceRegistered(A11Y_SERVICE))
         serviceRegistered();
 
-    // In addition try if there is an xatom exposing the bus address, this allows applications run as root to work
-    QString address = getAddressFromXCB();
-    if (!address.isEmpty()) {
-        m_enabled = true;
-        connectA11yBus(address);
+    if (QGuiApplication::platformName().startsWith("xcb"_L1)) {
+        // In addition try if there is an xatom exposing the bus address, this allows applications run as root to work
+        QString address = getAddressFromXCB();
+        if (!address.isEmpty()) {
+            m_enabled = true;
+            connectA11yBus(address);
+        }
     }
 }