VMS Help CC, /PROTOTYPE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

     /PROTOTYPE[=(option[,...])]
     /NOPROTOTYPE (D)

  Creates an output file containing function prototypes for all
  global functions defined in the module being compiled.

  The qualifier options are:

  [NO]IDENTIFIERS       Indicates that identifier names are to be
                        included in the prototype declarations that
                        appear in the output file.  The default is
                        NOIDENTIFIERS.

  [NO]STATIC_FUNCTIONS  Indicates that prototypes for static function
                        definitions are to be included in the output
                        file.  The default is NOSTATIC_FUNCTIONS.

  FILE=filename         Specifies the output file name.  When not
                        specified, the output file name has the same
                        defaults as the listing file, except that the
                        file extension is .CH instead of .LIS.

  The default is /NOPROTOTYPES.