Fix builds would compile parts for both Qt 5 and 6

CMAKE_PREFIX_PATHs that contained both Qt 5 and 6 would trigger
lines specific to both versions of the framework instead of only
running lines specific to the version being used for compilation

Solves #997

plugins/CMakeLists.txt

@@ -7,7 +7,7 @@
 # Contact KDAB at <[email protected]> for commercial licensing options.
 #
 
-if(TARGET Qt5::Core)
+if(QT_VERSION_MAJOR EQUAL 5 AND TARGET Qt5::Core)
     add_subdirectory(codecbrowser)
 endif()
 if((QT_VERSION_MAJOR EQUAL 5) OR (QT_VERSION_MAJOR EQUAL 6 AND TARGET Qt6::StateMachine))
@@ -35,7 +35,7 @@ if(TARGET Qt::Gui)
     add_subdirectory(guisupport)
     add_subdirectory(textdocumentinspector)
 endif()
-if(TARGET Qt5::Gui OR TARGET Qt6::OpenGL)
+if((QT_VERSION_MAJOR EQUAL 5 AND TARGET Qt5::Gui) OR (QT_VERSION_MAJOR EQUAL 6 AND TARGET Qt6::OpenGL))
     add_subdirectory(openglsupport)
 endif()
 

plugins/network/CMakeLists.txt

@@ -23,7 +23,7 @@ if(NOT GAMMARAY_CLIENT_ONLY_BUILD)
         networksupportinterface.cpp
         networksupportinterface.h
     )
-    if(TARGET Qt5::Network)
+    if(${QT_VERSION_MAJOR} EQUAL 5 AND TARGET Qt5::Network)
         list(APPEND gammaray_network_srcs networkconfigurationmodel.cpp networkconfigurationmodel.h)
     endif()
     gammaray_add_plugin(

plugins/openglsupport/CMakeLists.txt

@@ -18,7 +18,7 @@ if(NOT GAMMARAY_CLIENT_ONLY_BUILD)
         openglsupport.h
     )
     target_link_libraries(gammaray_openglsupport gammaray_core Qt::Gui Qt::CorePrivate)
-    if(TARGET Qt6::OpenGL)
+    if(QT_VERSION_MAJOR EQUAL 6 AND TARGET Qt6::OpenGL)
         target_link_libraries(gammaray_openglsupport Qt6::OpenGL)
     endif()
 endif()

plugins/statemachineviewer/CMakeLists.txt

@@ -49,7 +49,7 @@ if(NOT GAMMARAY_CLIENT_ONLY_BUILD)
     if(TARGET Qt::Scxml)
         target_link_libraries(gammaray_statemachineviewer_plugin Qt::Scxml Qt::ScxmlPrivate)
     endif()
-    if(TARGET Qt6::StateMachine)
+    if(QT_VERSION_MAJOR EQUAL 6 AND TARGET Qt6::StateMachine)
         target_link_libraries(gammaray_statemachineviewer_plugin Qt6::StateMachine Qt6::StateMachinePrivate)
     endif()
 endif()
@@ -83,7 +83,7 @@ if(GAMMARAY_BUILD_UI AND GAMMARAY_WITH_KDSME)
         gammaray_ui
     )
 
-    if(TARGET Qt6::StateMachine)
+    if(QT_VERSION_MAJOR EQUAL 6 AND TARGET Qt6::StateMachine)
         target_link_libraries(gammaray_statemachineviewer_ui_plugin Qt6::StateMachine)
     endif()
 endif()

tests/CMakeLists.txt

@@ -445,7 +445,7 @@ target_link_libraries(
     fontdatabasemodeltest Qt::Gui
 )
 
-if(TARGET Qt5::Core)
+if(QT_VERSION_MAJOR EQUAL 5 AND TARGET Qt5::Core)
     gammaray_add_test(
         codecmodeltest codecmodeltest.cpp ${CMAKE_SOURCE_DIR}/plugins/codecbrowser/codecmodel.cpp
         $<TARGET_OBJECTS:modeltestobj>
@@ -518,7 +518,7 @@ if(NOT GAMMARAY_CLIENT_ONLY_BUILD)
         )
 
         # only opengl rhi backend is supported atm
-        if(TARGET Qt6::Quick)
+        if(QT_VERSION_MAJOR EQUAL 6 AND TARGET Qt6::Quick)
             set_tests_properties(
                 quickinspectortest PROPERTIES ENVIRONMENT "QT_QUICK_BACKEND=rhi;QSG_RHI_BACKEND=opengl"
             )
@@ -528,7 +528,7 @@ if(NOT GAMMARAY_CLIENT_ONLY_BUILD)
             quickinspectortest2 quickinspectortest2.cpp quickinspectortest.qrc $<TARGET_OBJECTS:modeltestobj>
         )
         target_link_libraries(quickinspectortest2 gammaray_core gammaray_quickinspector_shared Qt::Quick)
-        if(TARGET Qt6::Quick)
+        if(QT_VERSION_MAJOR EQUAL 6 AND TARGET Qt6::Quick)
             set_tests_properties(
                 quickinspectortest2 PROPERTIES ENVIRONMENT "QT_QUICK_BACKEND=rhi;QSG_RHI_BACKEND=opengl"
             )