gawk cannot control the use of interval expressions from within a program

[Ruy Exel]

Is it possible to make gawk understand interval expressions (like when it is
given the option --re-interval) from within a gawk program?

I want to run a gawk program via the `#!' script interpreter and I do not know
how to pass options to gawk in this case.  I attempted to start my script with
the line:

    #!/usr/bin/gawk --re-interval -f

but it does not work.

Apparently the only option that may be controlled from within a program is the
--lint option, given that the section on Built-in Variables of the manual
says:

LINT        Provides dynamic control of the --lint option from within an  AWK  
pro-
          gram.   When  true, gawk prints lint warnings. When false, it does 
not.
          When assigned the string value  "fatal",  lint  warnings  become  
fatal
          errors,  exactly  like  --lint=fatal.  Any other true value just 
prints
          warnings.

Many thanks for any help.

Ruy Exel