kutils: implement KDNSSD::isSupported()

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>

kutils/kdnssd/kdnssd.cpp

@@ -458,6 +458,15 @@ KDNSSD::~KDNSSD()
     delete d;
 }
 
+bool KDNSSD::isSupported()
+{
+#if defined(HAVE_AVAHI)
+    return true;
+#else
+    return false;
+#endif
+}
+
 bool KDNSSD::publishService(const QByteArray &servicetype, const uint serviceport, const QString &servicename)
 {
     return d->publishService(servicetype, serviceport, servicename);

kutils/kdnssd/kdnssd.h

@@ -71,6 +71,8 @@ public:
     KDNSSD(QObject *parent = nullptr);
     ~KDNSSD();
 
+    static bool isSupported();
+
     /*!
         @brief Publishes service of type @p servicetype on port @p serviceport with name
         @p servicename on the default domain.