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From: wallis@labc.enet.dec.com (Barry L. Wallis)
Newsgroups: comp.os.msdos.programmer
Subject: Re: TurboC++ link question...
Message-ID: <18616@shlump.nac.dec.com>
Date: 2 Jan 91 15:34:05 GMT
Sender: newsdaemon@shlump.nac.dec.com
Organization: Digital Equipment Corporation
Lines: 27


In article <1990Dec26.205710.24627@cunixf.cc.columbia.edu>, rk29@cunixb.cc.columbia.edu (Robert  Kulagowski) writes...
> 
>     Briefly, my question is this:
>       In Programmer's Journal Magazine there's been a series of articles
>for upping graphics function speeds by writing them in assembler.  I've
>tried to link them in, but have had _no_ luck at all. The linker is giving me
>an "unknown symbol" error in the modules which reference the assembler
>routines. Now, I've already used MASM to compile the assembler source into
>..OBJ; in the Project menu I have the 3 source files which make up the program.
>Two are C, one is the .OBJ file. Can someone give me a walkthrough of getting
>the linker in the IDE to include the .OBJ file? Needless to say, the manuals
>weren't very helpful...

If you are using Turbo C++ (as opposed to Turbo C) you should define the
prototype for the assembler routines as extern "C". For example: 

extern "C" void line(int, int);

I don't have my manuals with me, but, I'm fairly sure of the above syntax.

---
Barry L. Wallis			USENET: wallis@labc.dec.com
Database Consultant		Prodigy (don't laugh): DNMX41A
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