cpack and third-party libs on mac os

Hi, thanks for your very fast answer.
I found this command:

add_custom_command(TARGET executable 
    POST_BUILD COMMAND 
    ${CMAKE_INSTALL_NAME_TOOL} -add_rpath "@executable_path/../../Frameworks/"
    $<TARGET_FILE:executable>)

My problem is: how can I run it recursively to non-system libraries?
Thanks
Angelo