From: David Stes <stes AT mundivia DOT es>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: please help me to compile an Objective-C program
Date: Thu, 13 Aug 1998 08:35:39 +0000
Organization: Mundivia, Santander
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Flatulator wrote:
> 
> Hi.  I'm new to Objective-C and I'm trying to compile this sample
> program.  I'm using DJGPP v2 to do it. 
> ...
> main.o(.text+0x31):main.m: undefined reference to `objc_get_class'
> main.o(.text+0x3c):main.m: undefined reference to `objc_msg_lookup'

Looks like you don't have runtime libraries.  There are libraries and
packages at sunsite for Linux. 
(http://sunsite.unc.edu/pub/Linux/devel/lang/objc/).