A lex question

[Edward C. Bennett]

	I'm in the process of trying to learn something about lex and yacc.
After typing in a lex demonstration program from "The UNIX Operating System"
by Kaare Christian (Hi Kaare!), compiling it revealed the symbol 'yywrap'
to be undefined. Why did this happen? How do i fix this problem? (Correctly,
of course. No kludges)

	I guess I should mention that I work on a PDP-11/44 running
2.9BSD.

-- 
edward

		 {ucbvax,unmvax,boulder,research}!anlams! -|
			{mcvax!qtlon,vax135,mddc}!qusavx! -|-->	ukma!edward
							   |
		{decvax,ihnp4,mhuxt,seismo}! -+-> cbosgd! -|
		{clyde,osu-eddie,ulysses}! ---|

	"Well, what's on the television then?"
	"Looks like a penguin."

	()
	|
        |--		Support barrier free design
       /|---
      |     \  _
       \___/ \=