From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Mon, 26 Nov 2012 08:25:13 -0500
To: 9fans@9fans.net
Message-ID: <a5617143b9125972cb18e1c5d4d1e4ef@brasstown.quanstro.net>
In-Reply-To: <afa0ce6d-0159-4ac6-b750-9eb924032635@googlegroups.com>
References: <afa0ce6d-0159-4ac6-b750-9eb924032635@googlegroups.com>
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Subject: Re: [9fans] Linking error with 8l, guys,
	could you tell me where to look?
Topicbox-Message-UUID: e4931e98-ead7-11e9-9d60-3106f5b1d025

On Mon Nov 26 04:56:23 EST 2012, zhangrui0000@gmail.com wrote:
> The message is:
>
> (2050) DATA  opnames<1>+116(SB)/4,$string<1>+739(SB)
> memccpy: multiple initialization
> (2170) DATA  etnames<1)+72(SB)/4,$string<1>+912(SB)
> memccpy: multiple initialization
>
> I know 2050 is somehow related to the line number where opnames appear in the code, and so is 2170 with etnames.
> I know it's suggesting I had an opnames initialized some where, but I just don't know where to look. I read the 8l man, but it seems there is no other docs where I can check for detail information.
> Can anybody tell me what the rest number of the message means, where should I look for the duplicate code?

this is the format from 8l/list.c:/^Pconv

			snprint(str, sizeof(str), "(%ld)	%A	%D,%D",
				p->line, p->as, &p->from, &p->to);

it looks like memccpy is defined twice in the same .8.
i'd look for the symbol rather than the line number.

the format of the line number doesn't fit the plumbable
convention, which would be file:line, and also appears to
not be the line number you are expecting.  it's
the line number after include files are processed.  which
while not wrong, is not helpful either.

- erik

---
example:

; cat mdef.c
#include <u.h>
#include <libc.h>

void
x(void)
{
}

void
x(void)
{
}

void
main(void)
{
}
; tmk mdef.c
6c -FVTw mdef.c
6l -o 6.mdef mdef.6
x: mdef.6: redefinition: x
(818)	TEXT	x+0(SB),$0
; # modified 8c to output line numbers in comments
; /sys/src/cmd/8c/6.out -S mdef.c
	TEXT	x+0(SB),0,$0	/* 806 */
	RET	,	/* 808 */
	TEXT	x+0(SB),0,$0	/* 811 */
	RET	,	/* 813 */
	TEXT	main+0(SB),0,$0	/* 816 */
	RET	,	/* 818 */
	END	,	/* 818 */