anchor.diff:        integer, parameter :: PL_FONT_STANDARD   =  0
         integer, parameter :: PL_FONT_EXTENDED   =  1
   
  +      real(kind=plflt), parameter :: PL_NOTSET = -42.0_plflt
  +
         !
         ! TODO:
         ! Parameters for fill patterns and symbols
  
positive.code: 
        interface
           subroutine plsori( rot )
              use plplot_flt
              real(kind=plflt) :: rot
           end subroutine plsori
        end interface
  
  
negative.code:       end interface
  
        interface
           subroutine plstar( nx, ny )
              integer :: nx, ny
           end subroutine plstar
        end interface
  
  