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Date: Thu, 30 Aug 2007 19:37:08 -0400
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From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
In-reply-to: <TfIBi.37363$rr5.32521@newsfe1-win.ntli.net>
	(My_address AT end DOT of DOT post)
Subject: Re: struct vs. typedef struct
References:  <TfIBi.37363$rr5 DOT 32521 AT newsfe1-win DOT ntli DOT net>
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> I'm not sure whether this is a DJGPP question or a C question,

It's a C question.

> but I think the problem is due to the single-pass compilation of
> DJGPP.

Nope.

> ... the compiler doesn't like it, I guess because when it encounters *next, 
> it hasn't seen the reference to S yet.

typedet struct S1
{
  struct S1 *next;
} S2;

You can't use a typedef (S2) until after it's defined.  You can use a
struct (S1) without a full reference; a typedef like the above can
include a struct definition (S1) and a "forward" struct usage (struct
S1 ...).

Normally, you'd use the same name for S1 and S2 in the example above.