From: broeker AT acp3bf DOT knirsch DOT de (Hans-Bernhard Broeker)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: assembly procedures w/ extern
Date: 18 Sep 1999 09:46:38 +0200
Organization: RWTH Aachen, III. physikalisches Institut B
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Bart Trzynadlowski (trzy AT powernet DOT net) wrote:
> Hi,
>     Ive been tearing my hair out trying to get extern to work in my
> DJGPP-compiled programs. What I want to do is have the program call an
> assembly subroutine. I declare it with extern but I can't even compile
> the program because it complains about an undefined reference. 

Careful, here. The message 'undefined reference' implies that you *did*
succeed in compiling the program, actually. It's the linker that failed,
probably because you didn't pass the .o file of the compiled .asm module,
along with the C part, when you did the final step. 

As a rough outline:

	nasm <options...> file1.asm -o file1.o
	gcc -c file2.c

	gcc -o program.exe file1.o file2.o


	
-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.