Workaround qt5.13 bug

CMakeLists.txt

@@ -142,7 +142,12 @@ configure_file(config-enterprise.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-ente
 include_directories(${kmail_SOURCE_DIR} ${kmail_BINARY_DIR})
 configure_file(kmail-version.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/kmail-version.h @ONLY)
 
-add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
+# workaround for https://bugreports.qt.io/browse/QTBUG-74665 (bug in qt5.13 reevaluate it)
+if (${Qt5Widgets_VERSION} STRGREATER "5.13")
+   MESSAGE(STATUS "Qt version: ${Qt5Widgets_VERSION} DISABLE compile without deprecated methods. bug QTBUG-74665")
+else()
+   add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
+endif()
 if (${KF5Config_VERSION} STRGREATER "5.56.0")
         add_definitions(-DQT_NO_FOREACH)
         MESSAGE(STATUS "compile without foreach")