Vorbis - Jun 2003 - using win32 static libs

hi,

i hope this is not too "newbie-ish" but i've never programmed with
static libs before.

i've downloaded the win32sdk and try to build a simple wav->ogg/vorbis
encoder, but the linker complained about several redefinitions.

environment is visual studio .net 2003 on winxp and a standard mfc-app set up by
this project-wizzard that comes with vs.net2003 using the default settings.

here the code:
----------------------------------------------------------------------
#include "StdAfx.h"
#include ".\ogg2wav.h"

#include "oggvorbis\vorbisenc.h"

#pragma comment(lib,"oggvorbis\\ogg_static.lib")
#pragma comment(lib,"oggvorbis\\vorbis_static.lib")
#pragma comment(lib,"oggvorbis\\vorbisenc_static.lib")

void COgg2Wav::Convert(CString strWavPath, CString strOggPath)
{
        vorbis_info      vi;

        vorbis_info_init(&vi);
        // here comes *the* code, when i'm done with the linker-issue ;)
}
----------------------------------------------------------------------
the compiler runs fine but the linker complains:
----------------------------------------------------------------------
OggVorbisTest error LNK2005: __ldused already defined in a previous module
OggVorbisTest error LNK2005: __fltused already defined in a previous module
OggVorbisTest error LNK2005: _exit already defined in msvcrt.lib(MSVCR71.dll)
OggVorbisTest error LNK2005: __exit already defined in msvcrt.lib(MSVCR71.dll)
OggVorbisTest error LNK2005: __cexit already defined in msvcrt.lib(MSVCR71.dll)
OggVorbisTest error LNK2005: __c_exit already defined in msvcrt.lib(MSVCR71.dll)
OggVorbisTest error LNK2005: __XcptFilter already defined in
msvcrt.lib(MSVCR71.dll)
OggVorbisTest error LNK2005: ___xc_z already defined in msvcrt.lib(cinitexe.obj)
OggVorbisTest error LNK2005: ___xc_a already defined in msvcrt.lib(cinitexe.obj)
OggVorbisTest error LNK2005: ___xi_z already defined in msvcrt.lib(cinitexe.obj)
OggVorbisTest error LNK2005: ___xi_a already defined in msvcrt.lib(cinitexe.obj)
OggVorbisTest error LNK2005: __setmbcp already defined in
libcmt.lib(mbctype.obj)
OggVorbisTest warning LNK4098: defaultlib 'msvcrt.lib' conflicts with
use of other libs; use /NODEFAULTLIB:library
OggVorbisTest warning LNK4098: defaultlib 'libcmt.lib' conflicts with
use of other libs; use /NODEFAULTLIB:library
OggVorbisTest fatal error LNK1169: one or more multiply defined symbols found
----------------------------------------------------------------------

i've tried the suggested options, and /NODEFAULTLIB:libcmt.lib solves the
problem :)

btw: /NODEFAULTLIB:msvcrt.lib was not a good idea, because then some basic
symbols (malloc etc) were not defined.

can someone explain that to me? why are the conflicts with msvcrt.lib gone, when
i'm excluding libcmt.lib? these too can't be conflicting because they
are both default-libs.
libcmt stands for libc m(ulti)t(hreaded)

do the ogg/vorbis-libs require certain linker options to be set/unset? is there
anything i need to know when working with the *_static.lib files from the
ogg/vorbis-win32sdk?

thx again for your help..+-j!i0+:)rhZm1hNrybXuz/-*arj)
'+a{
+v&{ay,rR{.n+z,z{m^+-)emw

Rüpel wrote:
> environment is visual studio .net 2003 on winxp and a standard
> mfc-app set up by this project-wizzard that comes with vs.net2003
> using the default settings.
The static libs that come with the SDK are built with VS6. I recommend 
recompiling the libs with your version of VS.NET. It isn't difficult, 
and cuts down on these sorts of problems.
>  defaultlib 'msvcrt.lib' conflicts with use of other libs;
>  defaultlib 'libcmt.lib' conflicts with use of other libs;
The SDK is compiled against the multithreaded C library, and your code 
is compiled with the DLL version of the C library (or vice versa). You 
have to compile everything against the same C library.
> do the ogg/vorbis-libs require certain linker options to be
> set/unset? is there anything i need to know when working with the
> *_static.lib files from the ogg/vorbis-win32sdk?
Yes. Actually, it's a compiler option (see above).

Peter Harris

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> i've tried the suggested options, and /NODEFAULTLIB:libcmt.lib solves
the
> problem :)
>
> btw: /NODEFAULTLIB:msvcrt.lib was not a good idea, because then some basic
> symbols (malloc etc) were not defined.
>
> can someone explain that to me? why are the conflicts with msvcrt.lib gone,
> when i'm excluding libcmt.lib? these too can't be conflicting
because they
> are both default-libs. libcmt stands for libc m(ulti)t(hreaded)
You have to link against the _same_ version of the c runtime libraries as 
libvorbis is linked against. If you don't have those versions (or can't
use
them for some reason), you should rebuild libvorbis from source (MSVC project 
files are provided) with the options you want to use.

Mike

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