Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!mcnc!rutgers!mtune!codas!burl!clyde!feg
From: feg@clyde.ATT.COM (Forrest Gehrke)
Newsgroups: comp.lang.c
Subject: Re: Assembly langauge subroutines for use with C
Message-ID: <11594@clyde.ATT.COM>
Date: Wed, 29-Jul-87 12:37:36 EDT
Article-I.D.: clyde.11594
Posted: Wed Jul 29 12:37:36 1987
Date-Received: Sat, 1-Aug-87 22:19:48 EDT
References: <3647@watdcsu.waterloo.edu> <537@cup.portal.com>
Organization: AT&T Bell Labs, Whippany, NJ
Lines: 15
Summary: Another suggestion

> In article <3647@watdcsu.waterloo.edu>  ryders@watdcsu.UUCP writes:
> 
> >How does one go about writing an assembly function that can be linked
> >and used by a C program? I have tried several times to get my modules
> >to link properly but with the end result of "Unresolved external".
> >


Write a short C function which includes a couple of declarations. 
Compile with the assembly language output switch on. The resulting module
(having the suffix ".cod") will give you a template of what your 
assembly language function needs to look like. Pay attention to the
entry and exit "housekeeping" assembly language code statements.

Forrest Gehrke