cDEC$ DECLARE
  cDEC$ NODECLARE

  The DECLARE directive generates warnings for variables that have
  been used but have not been declared (like the IMPLICIT NONE
  statement).  The NODECLARE directive (the default) disables these
  warnings.

  The "c" in cDEC$ is one of the following:  a C (or c), !, or *.

  The DECLARE directive is primarily a debugging tool that locates
  variables that have not been properly initialized, or that have
  been defined but never used.

  For compatibility, !MS$DECLARE and !MS$NODECLARE can be used in
  place of cDEC$ DECLARE and cDEC$ NODECLARE.