C linkage query

[Shankar Unni]

> > >I.e., if you compile a file containing
> > >	extern int foo;
> > >	main() {}
> > >and link that *with no other object files and with no libraries that
> > >define "foo"*, will the link fail?
> I have since learned that this is explicitly legal in ANSI C.

True. Section 3.7.1, footnote 75 in the Dec 88 draft.

>From the Dec 88 dpANS:

  75. Thus, if an identifier declared with external linkage is not used
      in an expression, there need be no external definition for it.

---
Shankar.