From: "Edmund Horner" <edmund1 AT geocities DOT com>
Newsgroups: comp.os.msdos.djgpp
References: <n1colsooqlrmkltk8f3b2hgnbinmj67jvk AT 4ax DOT com>
Subject: Re: problems with extern
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Date: Fri, 30 Jun 2000 18:21:43 +1200
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Tips:
* Look at the offending line, and count how many strings it contains -- my
estimate is 1.5 (I think you are missing a " in there).
* In file2.h, you'll need to include 'file1.h', so it has access to the
Location definitions/
* In file2.h, the 'init_location' prototype should have an 'extern' in front
of it.

I hope that was useful.

"Sean Proctor" <sproctor AT ccs DOT neu DOT edu> wrote in message
news:n1colsooqlrmkltk8f3b2hgnbinmj67jvk AT 4ax DOT com...
> alright, either there's a bug in djgpp or I'm an idiot... I have 4
> files. okay, here's how it's set up, pretty much
> file1.c:
> ...
> #include "file1.h"
> #include "file2.h"
> ...
> int function(Blah a)
> {
> init_location(locations);
> FILE *fp = fopen("file", "rt); /* this is the offending line
> according to the compiler... but the error goes away if I comment out
> the line above, no I didn't forget the semi-colon. ;) */
> ...
> }
> ...
>
> file1.h:
> ...
> typedef struct LOCATION Location;
> typedef struct BLAH Blah;
> ...
> struct LOCATION
> {
> ...
> };
> struct BLAH
> {
> ...
> };
> ...
>
> file2.c:
> ...
> Location *locations[NUMBER];
> ...
> void init_location(Location *loc[])
> {
> ...
> }
>
> file2.h
> void init_location(Location *[]);
> ...
> extern Location *locations[];
>
> and I believe that's all that's relevant... I don't see anything wrong
> with it... but of course I don't, I wrote it.
>
> Sean