Changed: Use Threads CMake module and CMAKE_DL_LIBS

--HG--
branch : develop

code/CMakeModules/FindHelpers.cmake

@@ -947,7 +947,8 @@ MACRO(FIND_QT5)
           ${CARBON_FRAMEWORK}
           ${SECURITY_FRAMEWORK})
       ELSEIF(UNIX)
-        SET(QT_LIBRARIES ${QT_LIBRARIES} ${ZLIB_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT} -ldl -lrt)
+        FIND_PACKAGE(Threads)
+        LIST(APPEND QT_LIBRARIES ${ZLIB_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS} -lrt)
       ENDIF()
     ELSE()
       SET(QT_LIBRARIES Qt5::Widgets Qt5::Network Qt5::Xml Qt5::Gui Qt5::OpenGL Qt5::Core)