LINK Help (linker.hlp) (Table of Contents; Topic list)
/PACKF Option
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     Syntax:  /PACKF[UNCTIONS]
 
     The /PACKF option removes unreferenced packaged functions. If a
     packaged function is defined but not called, LINK removes the
     definition from the executable file. /PACKF is on by default.
     See: Packaged Functions
 
     Use the /NOPACKF option to preserve the definitions. If /NOPACKF
     is set in an environment variable (such as LINK), you can use
     /PACKF to override /NOPACKF.
     See: /NOPACKF Option
 
     /PACKF is not recursive; LINK does not remove any external
     definitions brought in by the unused packaged function.
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