cDEC$ MESSAGE

  Specifies a character string to be sent to the standard output
  device during the first compiler pass; this aids debugging.

  This directive takes the following form:

  cDEC$ MESSAGE:string

    c        Is one of the following: C (or c), !, or *.

    string   Is a character constant specifying a message.

  For compatibility, !MS$MESSAGE can be used in place of cDEC$
  MESSAGE.

  Examples:

  Consider the following:

  !DEC$ MESSAGE:'Compiling Sound Speed Equations'