Date: Tue, 3 May 1994 09:32:07 -0400 (EDT)
From: Edwin Phillips <flaregun AT strauss DOT udel DOT edu>
Subject: Re: Problem with GAS :)
To: "Mark Wyman(AH)" <wymanm AT cork DOT cig DOT mot DOT com>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

On Tue, 3 May 1994, Mark Wyman(AH) wrote:

> How do you use .S files with the C++ compiler?
> 
> I have some functions written in GAS format that I used fine with
> the C compiler.  However, when I switched over to doing C++ I
> can't get the compiler to recognize the assembly functions.
> 
> For example, one of my routines is _SetPalette.  I included the
> .S file in the makefile (first thing I looked for :) ) and called
> _SetPalette from one of the .cc files.  Error came up saying unknown
> identifier.  I assembled the .cc file into a .S file to see what it
> was doing and it is trying to call _SetPalette__FlllPC.
> 
> Anyone know how to get it to recognize _SetPalette without renaming
> _SetPalette to _SetPalette__FlllPc?

  Mark,

	You need to use the following convention for prototyping C-compiled 
routines to call them from C++ (including GAS routines callable by C):

extern "C" {
	ret_type SetPalette(/* args and their types */);
}

  I has something to do with the way symbol names are constructed in C 
versus C++.  Note also that GAS defines _SetPallette, but you call it 
SetPallette from C or C++.

  Hope this helps,

  Ed

/***************************************************************************/
/* Ed Phillips  flaregun AT strauss DOT udel DOT edu      University of Delaware      */
/* Jr Systems Programmer  (302) 831-6082       NSS/Software Systems        */
/***************************************************************************/