Conditioning the /Copy Function

Does anyone out there programming using free format use the " /If Defined (
CopyfFunctionName )" and  also use cross-reference utility Hawkeye. 
For the past year we kind a made standard to use this technique for defining
prototypes in our programs. The members that contain our prototype
definitions can be rather lengthy with many definitions. Therefore this way
it will only include the prototypes that are being used.  Hawkeye had
recently sent out a new release to handle more functionality with AS400
releases. Since this last release their code cannot handle the conditioning
of copyfunctions. It seems to pull in all files in all programs where that
function is used. After working with them they are not sure if the task to
fix this major problem warrants the effort. 
        I am just curious and would like to know about many out there use
this technique. Or how many out there have Hawkeye and use functions and
procedures?