- Generate a pointer to a CHARACTER argument
Ensure that there exists a pointer to the character variable that
has been passed as an actual argument to the C routine. Also
generate a variable that contains the length of the actual
character argument and call it `arg_length'.
The dummy argument.
will expand as follows:
char x = x_arg-dsc$a_pointer;
int x_length = x_arg-dsc$w_length;
On Unix systems, this macro is null, but on a VAX/VMS system,
this macro actually declares the variables that are the pointer
to the character string and the integer that contains its