Path: news.cs.au.dk!not-for-mail
From: datpete@mjolner.dk
Newsgroups: comp.lang.beta
Subject: Re: snd.obj : error LNK2001: unresolved external symbol _sndPlaySound
Date: 25 May 1999 09:16:13 -0000
Organization: Mjolner Informatics ApS
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Sascha Kimmel writes:
> 
> Hello!
> 
> I'm trying to use the MS WINAPI function sndPlaySound
> (http://msdn.microsoft.com/library/sdkdoc/multimed/mmfunc_4uzo.htm) from
> within BETA.
> The program looks as follows:
> 
> ---- cut here ----
> 
> ORIGIN '~beta/guienv/v1.6/guienvall';
> 
> INCLUDE '~beta/guienv/v1.6/private/winnt/guienv_ntiprivate'
> 		'~beta/guienv/v1.6/private/winnt/stddialogs_ntibody'
> 		'~beta/win32lib/v1.6/ntinterface'
> 		'~beta/win32lib/v1.6/winuserconsts';
> 
> BUILD nti '$$/snd.obj' 'snd.c' 'betacc $0 $1';
> 
....
> ---- /cut here ----
> 
> I'm using snd.c just for including the necessary mmsystem.h:
> 
> ---- cut here ----
> 
> #include <windows.h>
> #include <stdio.h>
> #include <mmsystem.h>
> #include <windowsx.h>
> #include <stdlib.h>
> 
> ---- /cut here ----
> 
> When I try to compile this program I get the following error message:
> 
> d:\beta\tricos\nti\ms\snd.obj : warning LNK4042: object specified more
> than once
> ; extras ignored
> snd.obj : error LNK2001: unresolved external symbol _sndPlaySound
> snd.exe : fatal error LNK1120: 1 unresolved externals
> A Link Error Occurred
> 

Hi,

as pointed out by Manmathan, there does not seem to be any need to
include a C file with just #includes in

However this is not the reason for the link error. Asuming that there
actually is something in the snd.c file that you need to link onto
your BETA program.  Then the reason for the link error is that you
beta program seems to be named snd.bet, and this program uses the
snd.c C file.
Both of these will result in nti\ms\snd.o being generated - one of
them overwriting the other.
The linker explains that nti\ms\snd.o appears twice in the link 
directive and  later that it misses the contents of one of them 
(leading to unresolved symbols).

Sincerely,

Peter Andersen, Mjolner Informatics