Debug build LNK2005 cryptopp

MartinD

Hi,
I built Crypto++ 7 library using msvc2013, release dll. I linked it to my msvc2013 Qt app. If my app is built in release mode it runs. When I build it in debug configuration, linker outputs several LNK2005 errors:

cryptopp.lib(cryptopp.dll):-1: error: LNK2005: "public: static char const * __cdecl CryptoPP::SHA256::StaticAlgorithmName(void)" (?StaticAlgorithmName@SHA256@CryptoPP@@SAPBDXZ) already defined in hwid.obj

cryptopp.lib(cryptopp.dll):-1: error: LNK2005: "public: __thiscall CryptoPP::NotImplemented::NotImplemented(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??0NotImplemented@CryptoPP@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) already defined in config.obj

cryptopp.lib(cryptopp.dll):-1: error: LNK2005: "public: unsigned int __thiscall CryptoPP::BufferedTransformation::Put(unsigned char const *,unsigned int,bool)" (?Put@BufferedTransformation@CryptoPP@@QAEIPBEI_N@Z) already defined in config.obj

I also trie to build debug cryptopp dll and link it with my app in debug configuration - with the same result.

What is wrong with my app or cryptopp build?

SGaist

Hi,

~~What version of SQLite are you using ?~~

MartinD

Why sqlite? I use it, I think it is built in Qt (5.7.1 in my case). Or not?

SGaist

Completely unrelated... A usual case of answer on the wrong thread.

The question was: how did you separate the debug and release builds of that library ?

MartinD

Crypto++ comes with Visual Studio solution files, it is possible to build debug and release versions. But it seems DLL is not recomended for use, one should go with static build. https://www.cryptopp.com/wiki/FIPS_DLL