Adapt to build against qt6

CMakeLists.txt

@@ -5,14 +5,12 @@ set(PROJECT_VERSION "5.24.80")
 set(PROJECT_VERSION_MAJOR 5)
 
 set(QT_MIN_VERSION "5.15.0")
-set(KF5_MIN_VERSION "5.86")
+set(KF5_MIN_VERSION "5.90")
 set(KDE_COMPILERSETTINGS_LEVEL "5.82")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED NO_MODULE)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
 
-find_package(Qt5 ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Qml Quick Widgets)
-find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS CoreAddons I18n Declarative ItemModels Service Plasma Runner)
 
 include(FeatureSummary)
 include(KDEInstallDirs)
@@ -23,6 +21,9 @@ include(GenerateExportHeader)
 include(KDEClangFormat)
 include(KDEGitCommitHooks)
 
+find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Qml Quick Widgets)
+find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS CoreAddons I18n Declarative ItemModels Service Plasma Runner)
+
 add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050c00)
 
 add_definitions(-DQT_NO_FOREACH -DQT_NO_KEYWORDS)

lib/sourcesmodel.cpp

@@ -261,8 +261,11 @@ void SourcesModel::slotMatchesChanged(const QList<Plasma::QueryMatch> &l)
     // that do not
     // The rest are given the same preference as given by the runners.
     const QString simplifiedQuery = m_queryString.simplified();
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     const auto words = simplifiedQuery.splitRef(QLatin1Char(' '), Qt::SkipEmptyParts);
-
+#else
+    const auto words = QStringView(simplifiedQuery).split(QLatin1Char(' '), Qt::SkipEmptyParts);
+#endif
     QSet<QString> higherTypes;
     for (const QString &type : qAsConst(m_types)) {
         const TypeData td = m_matches.value(type);

lib/test/CMakeLists.txt

-find_package(Qt5 ${REQUIRED_QT_VERSION} CONFIG REQUIRED Test)
+find_package(Qt${QT_MAJOR_VERSION} ${REQUIRED_QT_VERSION} CONFIG REQUIRED Test)
 include_directories(
   ${CMAKE_CURRENT_SOURCE_DIR}/..
 )