low level optimization

[David Brooks]

In article <21868 at lanl.gov>, jlg at cochiti.lanl.gov (Jim Giles) writes:
|> I see that I'm going to have to give a specific example.  Suppose
|> that functions A and B are in two separate files.  Suppose that
|> I compile them 'together' in some way (that is, the compiler makes
|> some use of internal knowledge of B while translating A and vice-versa).
|> Now, suppose I _change_ A and retranslate just A (I do _not_ retranslate
|> B).  The standard requires that I still be able to link both into a
|> single program.

This has never been the case.  Using pre-ANSI syntax:

B:

	some_routine(123);

A:

	some_routine(arg)
	int arg;
	{...

A after editing:

	some_routine(flag, arg)
	int flag, arg;
	{...
-- 
David Brooks				dbrooks at osf.org
Systems Engineering, OSF		uunet!osf.org!dbrooks
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