Switch from Qt5 to Qt6 (#13)

* Switch from Qt5 to Qt6 by default

- Fix compile with Qt6

* Use QT_MAJOR_VERSION and set to 6 as default

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.16.0)
 
 # Version setup
 set(OPENBSDISKS_VERSION_MAJOR "0")
-set(OPENBSDISKS_VERSION_MINOR "4")
+set(OPENBSDISKS_VERSION_MINOR "5")
 set(OPENBSDISKS_VERSION_PATCH "0")
 set(OPENBSDISKS_VERSION "${OPENBSDISKS_VERSION_MAJOR}.${OPENBSDISKS_VERSION_MINOR}.${OPENBSDISKS_VERSION_PATCH}")
 
@@ -17,6 +17,8 @@ if(NOT CMAKE_BUILD_TYPE)
             FORCE)
 endif()
 
+set(QT_MAJOR_VERSION 6 CACHE STRING "Qt version to use (5 or 6), defaults to 6")
+
 include(GNUInstallDirs)
 
 option(INSTALL_POLKIT_RULES "Install polkit rules" OFF)
@@ -25,8 +27,7 @@ option(INSTALL_MAN_PAGES "Install man pages" ON)
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_AUTOMOC ON)
 
-set(QT5COMPONENTS Core DBus)
-find_package(Qt5 COMPONENTS ${QT5COMPONENTS} REQUIRED)
+find_package(Qt${QT_MAJOR_VERSION} COMPONENTS Core DBus REQUIRED)
 find_package(Threads REQUIRED)
 
 set(SOURCE
@@ -46,7 +47,7 @@ set(SOURCE
 )
 add_executable(openbsdisks2 ${SOURCE})
 
-target_link_libraries(openbsdisks2 Qt5::DBus Qt5::Core util)
+target_link_libraries(openbsdisks2 Qt${QT_MAJOR_VERSION}::DBus Qt${QT_MAJOR_VERSION}::Core util)
 
 target_compile_features(openbsdisks2 PRIVATE cxx_std_17)
 target_compile_options(openbsdisks2 PRIVATE "-Wall")

src/adaptors.h

@@ -18,7 +18,6 @@ class QByteArray;
 template<class T> class QList;
 template<class Key, class Value> class QMap;
 class QString;
-class QStringList;
 class QVariant;
 
 #include <QVariantMap>

src/disk_label.cpp

@@ -84,7 +84,7 @@ void DiskLabel::analyseDev(const QString& dev)
     for (int i = 0; i < lab.d_npartitions; i++) {
         pp = &lab.d_partitions[i];
         if (DL_GETPSIZE(pp) > 0) {
-            QString p('a' + i);
+            const QString p = QChar('a' + i);
             if (p != QStringLiteral("c")) {
                 if (isValidFileSysetem(pp->p_fstype)) {
                     auto block = createBlock(

src/manageradaptor.h

@@ -17,8 +17,8 @@
 class QByteArray;
 template<class T> class QList;
 template<class Key, class Value> class QMap;
+
 class QString;
-class QStringList;
 class QVariant;
 
 typedef QMap<QString, QVariantMap> QVariantMapMap;