Date: Thu, 18 Jan 1996 09:45:41 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: Peter Plum <enoch AT terranet DOT terranet DOT ab DOT ca>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: Peter: More help with undefined references and yes -Wall


On Wed, 17 Jan 1996, Peter Plum wrote:

> If a certain.h file is needed do we need to have
> the corresponding certain.c file as well?
> I was trying to conpile the following file from
> \SRC\BINUT-2.4\BINUTILS\ directory and got the 
> following response.  As you can see I tried
> -lpc.  I did have to find and install bfd.h
> ansidecl.h, bucomm.h and getopt.h where they 
> could be found.  What else is necessary?
> 
> Thanks again!
> 
> -2.4\BINUTILS>gcc STRINGS.c -lpc   -liostr
>  undefined reference to `program_name'

You can't easily build a single program from a GNU package without 
building the entire package.  GNU software is typically set up so that 
you have a few programs which share a common library (or libraries) of 
functions.  The Makefile you get with the package builds the library(ies) 
first, then the programs.  In your case, STRINGS needs some functions 
from the libraries whose source is included in the Binutils package, but 
you either didn't give their names on the command line or didn't build 
the libraries at all in the first place.

The correct way of building STRINGS would be to go to the main directory 
where you unpacked the package and say `make strings'.  That should do 
the necessary steps in the necessary sequence automatically (that is what 
Make and Makefiles are for).