Use versionless Qt cmake target. This makes it easier to build against both Qt5 and Qt6

CMakeLists.txt

@@ -8,7 +8,7 @@ set (RELEASE_SERVICE_VERSION "${RELEASE_SERVICE_VERSION_MAJOR}.${RELEASE_SERVICE
 
 project(KSystemlog VERSION ${RELEASE_SERVICE_VERSION})
 
-set (QT_MIN_VERSION "5.14.0")
+set (QT_MIN_VERSION "5.15.0")
 set (KF5_MIN_VERSION "5.80.0")
 
 find_package (ECM ${KF5_MIN_VERSION} REQUIRED NO_MODULE)

autotests/CMakeLists.txt

@@ -14,7 +14,7 @@ include_directories(
 
 add_library(testCore STATIC testUtil.cpp testResources.qrc )
 target_link_libraries(testCore PUBLIC
-    Qt5::Test
+    Qt::Test
     ksystemlog_lib
     ksystemlog_base_mode
     ksystemlog_config

src/lib/CMakeLists.txt

@@ -50,8 +50,8 @@ add_dependencies(
 
 target_link_libraries(ksystemlog_lib
     ksystemlog_config
-    Qt5::Widgets
-    Qt5::PrintSupport
+    Qt::Widgets
+    Qt::PrintSupport
     KF5::I18n
     KF5::Archive
     KF5::ConfigWidgets

src/modes/journald/CMakeLists.txt

@@ -29,6 +29,6 @@ target_link_libraries(
     ksystemlog_base_mode
     ksystemlog_config
     ${JOURNALD_LIBRARIES}
-    Qt5::Concurrent
-    Qt5::Network
+    Qt::Concurrent
+    Qt::Network
 )