[pups] Stupid question.. - TUHS

15 Jan 2001

Hey.

I'm playing around with a /53 running 2.11BSD, trying to port some 
software, and I have a (probably stupid) problem: environ.

When I write a simple program like

#include <stdio.h>

extern char **environ;

void main(argc, argv)
int argc;
char **argv;
{
    printf("Hello world!");
    environ=environ;
}

and compile & link it using cc ("cc -o test test.c"), things go fine, 
however if I link things manually ("cc -c test.c ; ld -o test test.o -lc")
I get an unresolved _environ. By some experimentation, I noticed that
including /lib/crt0.o in the linker helps to some extent - however,
the binary generated by cc works like a charm, while the manually
linked version quits with a bus error. Any ideas?

-- 
    Martijn van Buul -  Pino(a)dohd.org - http://www.stack.nl/~martijnb/
	 Geek code: G--  - Visit OuterSpace: mud.stack.nl 3333
   Kees J. Bot: The sum of CPU power and user brain power is a constant.

Received: (from major@localhost)
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) id JAA08435
	for pups-liszt; Tue, 16 Jan 2001 09:22:57 +1100 (EST)
	(envelope-from owner-pups(a)minnie.cs.adfa.edu.au)
...
 From "Steven M. Schultz"
&lt;sms(a)moe.2bsd.com&gt; Tue Jan 16 08:15:45 2001 Received: from
henry.cs.adfa.edu.au (henry.cs.adfa.edu.au [131.236.21.158])
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id JAA08430
	for &lt;pups(a)minnie.cs.adfa.edu.au&gt;; Tue, 16 Jan 2001 09:22:55 +1100 (EST)
	(envelope-from wkt(a)henry.cs.adfa.edu.au)
Received: (from wkt@localhost)
	by henry.cs.adfa.edu.au (8.11.1/8.9.3) id f0FMTm309828
	for pups(a)minnie.cs.adfa.edu.au; Tue, 16 Jan 2001 09:29:48 +1100 (EST)
	(envelope-from wkt)
Received: from moe.2bsd.com (MOE.2BSD.COM [206.139.202.200])
	by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id JAA08355
	for &lt;pups(a)minnie.cs.adfa.edu.au&gt;; Tue, 16 Jan 2001 09:17:00 +1100 (EST)
	(envelope-from sms(a)moe.2bsd.com)
Received: (from sms@localhost)
	by moe.2bsd.com (8.10.1/8.10.1) id f0FMFjJ26746
	for pups(a)minnie.cs.adfa.edu.au; Mon, 15 Jan 2001 14:15:45 -0800 (PST)
Date: Mon, 15 Jan 2001 14:15:45 -0800 (PST)
From: "Steven M. Schultz" &lt;sms(a)moe.2bsd.com&gt;
Message-Id: &lt;200101152215.f0FMFjJ26746(a)moe.2bsd.com&gt;
To: pups(a)minnie.cs.adfa.edu.au
Subject: Re: [pups] Stupid question..
Sender: owner-pups(a)minnie.cs.adfa.edu.au
Precedence: bulk

Hi -

...
  From: Martijn van Buul &lt;pino(a)dohd.org&gt;

 however if I link things manually ("cc -c test.c ; ld -o test test.o -lc")
 I get an unresolved _environ. By some experimentation, I noticed that
 including /lib/crt0.o in the linker helps to some extent - however,
 the binary generated by cc works like a charm, while the manually
 linked version quits with a bus error. Any ideas? 
	Try placing /lib/crt0.o before the test.o:

		ld -o test /lib/crt0.o test.o -lc

	on another note it's usually not a good idea to call a program 'test'
	because when you are least expecting it you will end up running
	/bin/test and wonder what is wrong.

	Steven