Define -DQT_NO_CAST_TO_ASCII and fix compilation

CMakeLists.txt

@@ -49,7 +49,7 @@ include(ECMOptionalAddSubdirectory)
 include(ECMConfiguredInstall)
 include(ECMQtDeclareLoggingCategory)
 
-add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0 -DQT_USE_QSTRINGBUILDER -DQT_NO_URL_CAST_FROM_STRING)
+add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0 -DQT_USE_QSTRINGBUILDER -DQT_NO_URL_CAST_FROM_STRING -DQT_NO_CAST_TO_ASCII)
 
 # Prevent EGL headers from including platform headers, in particular Xlib.h.
 add_definitions(-DMESA_EGL_NO_X11_HEADERS)

src/plugins/platforms/virtual/virtual_output.cpp

@@ -53,10 +53,10 @@ void VirtualOutput::init(const QPoint &logicalPosition, const QSize &pixelSize)
     mode.size = pixelSize;
     mode.flags = KWaylandServer::OutputDeviceInterface::ModeFlag::Current;
     mode.refreshRate = refreshRate;
-    initInterfaces(QByteArray("model_").append(QString::number(m_identifier)),
-                   QByteArray("manufacturer_").append(QString::number(m_identifier)),
-                   QByteArray("UUID_").append(QString::number(m_identifier)),
-                   pixelSize, { mode }, QByteArray("EDID_").append(QString::number(m_identifier)));
+    initInterfaces(QByteArray("model_").append(QByteArray::number(m_identifier)),
+                   QByteArray("manufacturer_").append(QByteArray::number(m_identifier)),
+                   QByteArray("UUID_").append(QByteArray::number(m_identifier)),
+                   pixelSize, { mode }, QByteArray("EDID_").append(QByteArray::number(m_identifier)));
     setGeometry(QRect(logicalPosition, pixelSize));
 }