[CMake] multiple line of comment howto

[luxInteg]

Greetings

I am learniong cmake.  From the documentation:-
 add_custom_target(Name [ALL] [command1 [args1...]]
                    [COMMAND command2 [args2...] ...]
                    [DEPENDS depend depend depend ... ]
                    [WORKING_DIRECTORY dir]
                    [COMMENT comment] [VERBATIM]
                    [SOURCES src1 [src2...]])




I want to  generate multiple line   in the compiler output
  when using add_custom_target()  such as  shown below

#-----------
set(line0 ""                )
set(line1     "############################" )
set(line2    "compiling $some_source_code} ' )
#------

add_custom_command(whatever ALL
  .......
COMMAND ${whatever}
COMMENT  ${line0}  ${line1}  ${line2} ${line1} ${line0}
VERBATIM )


is the above recommended   to generate multiple lines?
Guidance would be appreciated.