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From: NickP on 10 Feb 2006 10:03
Hi there,

I have a VC Win32 application compiling under VS.NET 2003 no problems,
but when attempting to compile under VS.NET 2005 I am recieving linker
problems. The only main difference between the 2 systems is that I am using
the latest platform SDK on the 2005 system in order to utilize the latest
DirectX (DirectShow) SDK.

Anyway, the linker error I'm recieving is

Error 79 error LNK2019: unresolved external symbol "wchar_t * __stdcall
_com_util::ConvertStringToBSTR(char const *)"
(?ConvertStringToBSTR@_com_util@@YGPA_WPBD@Z) referenced in function
"public: __thiscall _bstr_t::Data_t::Data_t(char const *)"
(??0Data_t@_bstr_t@@QAE(a)PBD@Z) MTDetector.obj
Error 80 error LNK2019: unresolved external symbol "char * __stdcall
_com_util::ConvertBSTRToString(wchar_t *)"
(?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) referenced in function
"public: char const * __thiscall _bstr_t::Data_t::GetString(void)const "
(?GetString(a)Data_t@_bstr_t@@QBEPBDXZ) MTDetector.obj
Error 81 error LNK2001: unresolved external symbol "char * __stdcall
_com_util::ConvertBSTRToString(wchar_t *)"
(?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) SrcFilter.obj
Error 82 error LNK2001: unresolved external symbol "char * __stdcall
_com_util::ConvertBSTRToString(wchar_t *)"
(?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) TCSource.obj
Error 83 fatal error LNK1120: 2 unresolved externals Raptor - <filename>

I can't find any references to this call in any of my source code so I
can only presume that something else I am linking in is requiring this
reference?

The libraries I am including and also include in VS.NET 2003 which
compiles perfectly are...

comctl32.lib
ws2_32.lib
gdiplus.lib
winmm.lib
strmbase.lib
kernel32.lib
user32.lib
gdi32.lib
advapi32.lib
shell32.lib
ole32.lib
oleaut32.lib
uuid.lib
msimg32.lib
imagehlp.lib
msxml2.lib
wmvcore.lib
wininet.lib
rpcrt4.lib

What confuses me most is why this would work in 2003 and not 2005? Had
anyone else experienced this problem and have any kind of a resolve? Thanks
I'm eagerly awaiting some answer, cheers in advance!

Nick.


From: Bruno van Dooren on 10 Feb 2006 11:00
> I have a VC Win32 application compiling under VS.NET 2003 no problems,
> but when attempting to compile under VS.NET 2005 I am recieving linker
> problems. The only main difference between the 2 systems is that I am
> using the latest platform SDK on the 2005 system in order to utilize the
> latest DirectX (DirectShow) SDK.
>
> Anyway, the linker error I'm recieving is
>
> Error 79 error LNK2019: unresolved external symbol "wchar_t * __stdcall
> _com_util::ConvertStringToBSTR(char const *)"
> (?ConvertStringToBSTR@_com_util@@YGPA_WPBD@Z) referenced in function
> "public: __thiscall _bstr_t::Data_t::Data_t(char const *)"
> (??0Data_t@_bstr_t@@QAE(a)PBD@Z) MTDetector.obj
> Error 80 error LNK2019: unresolved external symbol "char * __stdcall
> _com_util::ConvertBSTRToString(wchar_t *)"
> (?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) referenced in function
> "public: char const * __thiscall _bstr_t::Data_t::GetString(void)const "
> (?GetString(a)Data_t@_bstr_t@@QBEPBDXZ) MTDetector.obj
> Error 81 error LNK2001: unresolved external symbol "char * __stdcall
> _com_util::ConvertBSTRToString(wchar_t *)"
> (?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) SrcFilter.obj
> Error 82 error LNK2001: unresolved external symbol "char * __stdcall
> _com_util::ConvertBSTRToString(wchar_t *)"
> (?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) TCSource.obj
> Error 83 fatal error LNK1120: 2 unresolved externals Raptor - <filename>
>
> I can't find any references to this call in any of my source code so I
> can only presume that something else I am linking in is requiring this
> reference?
>
> The libraries I am including and also include in VS.NET 2003 which
> compiles perfectly are...
>
> comctl32.lib
> ws2_32.lib
> gdiplus.lib
> winmm.lib
> strmbase.lib
> kernel32.lib
> user32.lib
> gdi32.lib
> advapi32.lib
> shell32.lib
> ole32.lib
> oleaut32.lib
> uuid.lib
> msimg32.lib
> imagehlp.lib
> msxml2.lib
> wmvcore.lib
> wininet.lib
> rpcrt4.lib
>
> What confuses me most is why this would work in 2003 and not 2005? Had
> anyone else experienced this problem and have any kind of a resolve?
> Thanks I'm eagerly awaiting some answer, cheers in advance!

from the ConvertStringToBSTR documentation in MSDN 2005,
Header: comutil.h
Lib: comsuppw.lib or comsuppwd.lib (see /Zc:wchar_t (wchar_t Is Native Type)
for more information)

in MSDN2003, it specifies commsupp.lib, not comsuppw.lib

you lib list does not include comsuppw.lib. Try to add it.
I seem to remember someone mentioning on this list that this problem is
caused
by the fact that the default for wchar_t changed from VC2003 to VC2005.


--

Kind regards,
Bruno.
bruno_nos_pam_van_dooren(a)hotmail.com
Remove only "_nos_pam"


From: NickP on 10 Feb 2006 12:26
Hi Bruno,

I managed to get rid of the error finally by recompiling another library
that I hadnt mentioned I was linking in the list. It now doesnt look for
said function.

Cheers for your help and sorry for my delay getting back to you. And
cheers for telling me the reason why this happens, very informative!

Nick.

"Bruno van Dooren" <bruno_nos_pam_van_dooren(a)hotmail.com> wrote in message
news:%238mVYslLGHA.2624(a)TK2MSFTNGP12.phx.gbl...
>> I have a VC Win32 application compiling under VS.NET 2003 no problems,
>> but when attempting to compile under VS.NET 2005 I am recieving linker
>> problems. The only main difference between the 2 systems is that I am
>> using the latest platform SDK on the 2005 system in order to utilize the
>> latest DirectX (DirectShow) SDK.
>>
>> Anyway, the linker error I'm recieving is
>>
>> Error 79 error LNK2019: unresolved external symbol "wchar_t * __stdcall
>> _com_util::ConvertStringToBSTR(char const *)"
>> (?ConvertStringToBSTR@_com_util@@YGPA_WPBD@Z) referenced in function
>> "public: __thiscall _bstr_t::Data_t::Data_t(char const *)"
>> (??0Data_t@_bstr_t@@QAE(a)PBD@Z) MTDetector.obj
>> Error 80 error LNK2019: unresolved external symbol "char * __stdcall
>> _com_util::ConvertBSTRToString(wchar_t *)"
>> (?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) referenced in function
>> "public: char const * __thiscall _bstr_t::Data_t::GetString(void)const "
>> (?GetString(a)Data_t@_bstr_t@@QBEPBDXZ) MTDetector.obj
>> Error 81 error LNK2001: unresolved external symbol "char * __stdcall
>> _com_util::ConvertBSTRToString(wchar_t *)"
>> (?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) SrcFilter.obj
>> Error 82 error LNK2001: unresolved external symbol "char * __stdcall
>> _com_util::ConvertBSTRToString(wchar_t *)"
>> (?ConvertBSTRToString@_com_util@@YGPADPA_W@Z) TCSource.obj
>> Error 83 fatal error LNK1120: 2 unresolved externals Raptor - <filename>
>>
>> I can't find any references to this call in any of my source code so I
>> can only presume that something else I am linking in is requiring this
>> reference?
>>
>> The libraries I am including and also include in VS.NET 2003 which
>> compiles perfectly are...
>>
>> comctl32.lib
>> ws2_32.lib
>> gdiplus.lib
>> winmm.lib
>> strmbase.lib
>> kernel32.lib
>> user32.lib
>> gdi32.lib
>> advapi32.lib
>> shell32.lib
>> ole32.lib
>> oleaut32.lib
>> uuid.lib
>> msimg32.lib
>> imagehlp.lib
>> msxml2.lib
>> wmvcore.lib
>> wininet.lib
>> rpcrt4.lib
>>
>> What confuses me most is why this would work in 2003 and not 2005?
>> Had anyone else experienced this problem and have any kind of a resolve?
>> Thanks I'm eagerly awaiting some answer, cheers in advance!
>
> from the ConvertStringToBSTR documentation in MSDN 2005,
> Header: comutil.h
> Lib: comsuppw.lib or comsuppwd.lib (see /Zc:wchar_t (wchar_t Is Native
> Type) for more information)
>
> in MSDN2003, it specifies commsupp.lib, not comsuppw.lib
>
> you lib list does not include comsuppw.lib. Try to add it.
> I seem to remember someone mentioning on this list that this problem is
> caused
> by the fact that the default for wchar_t changed from VC2003 to VC2005.
>
>
> --
>
> Kind regards,
> Bruno.
> bruno_nos_pam_van_dooren(a)hotmail.com
> Remove only "_nos_pam"
>
>


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