Hello everyone,

I am using Visual Studio 2017 update 3 on windows 10 with cryptopp565, 
linking to the DLL. I am getting a failure to find certain symbols:

blah.obj) : error LNK2001: unresolved external symbol "protected: virtual 
bool __cdecl CryptoPP::FilterWithBufferedInput::DidFirstPut(void)const " 
(?DidFirstPut@FilterWithBufferedInput@CryptoPP@@MEBA_NXZ)
blah.obj) : error LNK2001: unresolved external symbol "protected: virtual 
unsigned __int64 __cdecl 
CryptoPP::FilterWithBufferedInput::GetBlockPutSize(void)const " 
(?GetBlockPutSize@FilterWithBufferedInput@CryptoPP@@MEBA_KXZ)
blah.obj) : error LNK2001: unresolved external symbol "protected: virtual 
unsigned __int64 __cdecl 
CryptoPP::FilterWithBufferedInput::GetFirstPutSize(void)const " 
(?GetFirstPutSize@FilterWithBufferedInput@CryptoPP@@MEBA_KXZ)
blah.obj) : error LNK2001: unresolved external symbol "protected: virtual 
unsigned __int64 __cdecl 
CryptoPP::FilterWithBufferedInput::GetLastPutSize(void)const " 
(?GetLastPutSize@FilterWithBufferedInput@CryptoPP@@MEBA_KXZ)

Any ideas why this might be? I see the functions are impure virtual and 
have inline implementations in filter.h. I also see that the class does do 
a DLL export. I note there is a new release that has been test built with 
VS2017. In the fullness of time we will probably move to that one but 
surely 565 should work....?

Regards,

Andrew M.

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