Xref: news2.mv.net comp.os.msdos.djgpp:5041
From: brucef AT central DOT co DOT nz (Bruce Foley)
Newsgroups: comp.os.msdos.djgpp
Subject: Help new user with linking problems...
Date: Sat, 15 Jun 1996 20:40:15 GMT
Organization: Internet Company of New Zealand
Lines: 28
Message-ID: <4pvael$dic@status.gen.nz>
NNTP-Posting-Host: brucef.central.co.nz
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp


Hi.

I have just downloaded DJGPP.  Up until now I have been a Borland
User, and have (almost) completed my first game using these tools.
Since I want to move to a DPMI environment for future efforts, and
having heard about this great GNU port called DJGPP, I have decided to
have a look.
I'm pretty damn impressed, but I have hit my first problem, which I am
sure has a simple and obvious answer.
I want to be able to write external assembler routines to supplement
my main C program.  With this in mind, I wrote a simple AT&T module
and assembled it with "as", producing a .o object file.
By looking at other code, it appears that all I need to do is declare
the routine as .global to make it accessable to a C program.
I then wrote a simple C program that prototypes the external routine
as extern, but I get an "undefined reference" error message  in my C
program when linking.  What am I doing wrong?  I used the following
command lines:
gcc -o test.exe s1.s c1.c
gcc -o test.exe s1.o c1.c

<and a few others>  but I always get the same error.
Any help would be greatly appreciated.

Bruce.