Re: [Ccrtp-devel] Using the ccRTP project

[David Sugar]

Recent versions of ccrtp use gcrypt to support SRTP (and zrtp).  You can
disable this by making sure SRTP_SUPPORT is not defined in your
build environment and the config.h your using.  Or you can try porting
gcrypt (or openssl crypto) to MSVC and building with that.

Depending on the version of MSVC, you may still be unable to build under
MSVC, at least if you build ccrtp as a DLL.  ccrtp currently uses STL in
a few places, and more recent versions of MSVC have further broken
support for STL where it is no longer possible to effectively use STL
within a DLL and successfully link.

MyMailHobby wrote:
> Dear David!
> I use MSVC++ to compile the ccRTP project. During the compilation
> process, the following errors occur:
> 
> Linking...
> 1>control.obj : warning LNK4075: ignoring '/EDITANDCONTINUE' due to 
> '/INCREMENTAL:NO' specification
> 1>   Creating library .\Debug/ccrtp1.lib and object .\Debug/ccrtp1.exp
> 1>incqueue.obj : error LNK2019: unresolved external symbol "public: 
> __thiscall ost::CryptoContext::~CryptoContext(void)" 
> (address@hidden@@address@hidden) referenced in function "public: void * 
> __thiscall ost::CryptoContext::`scalar deleting destructor'(unsigned int)" 
> (address@hidden@@address@hidden)
> 1>outqueue.obj : error LNK2001: unresolved external symbol "public: 
> __thiscall ost::CryptoContext::~CryptoContext(void)" 
> (address@hidden@@address@hidden)
> 1>rtppkt.obj : error LNK2019: unresolved external symbol "public: void 
> __thiscall ost::CryptoContext::srtpAuthenticate(class ost::RTPPacket 
> *,unsigned int,unsigned char *)" 
> (address@hidden@ost@@address@hidden@address@hidden) referenced in function 
> "public: void __thiscall ost::OutgoingRTPPkt::protect(unsigned int,class 
> ost::CryptoContext *)" (address@hidden@ost@@address@hidden@@Z)
> 1>rtppkt.obj : error LNK2019: unresolved external symbol "public: void 
> __thiscall ost::CryptoContext::srtpEncrypt(class ost::RTPPacket *,unsigned 
> __int64,unsigned int)" (address@hidden@ost@@address@hidden@address@hidden) 
> referenced in function "public: void __thiscall 
> ost::OutgoingRTPPkt::protect(unsigned int,class ost::CryptoContext *)" 
> (address@hidden@ost@@address@hidden@@Z)
> 1>rtppkt.obj : error LNK2019: unresolved external symbol "public: void 
> __thiscall ost::CryptoContext::update(unsigned short)" 
> (address@hidden@ost@@address@hidden) referenced in function "public: int 
> __thiscall ost::IncomingRTPPkt::unprotect(class ost::CryptoContext *)" 
> (address@hidden@ost@@address@hidden@@Z)
> 1>rtppkt.obj : error LNK2019: unresolved external symbol "public: unsigned 
> __int64 __thiscall ost::CryptoContext::guessIndex(unsigned short)" 
> (address@hidden@ost@@address@hidden) referenced in function "public: int 
> __thiscall ost::IncomingRTPPkt::unprotect(class ost::CryptoContext *)" 
> (address@hidden@ost@@address@hidden@@Z)
> 1>rtppkt.obj : error LNK2019: unresolved external symbol "public: bool 
> __thiscall ost::CryptoContext::checkReplay(unsigned short)" 
> (address@hidden@ost@@address@hidden) referenced in function "public: int 
> __thiscall ost::IncomingRTPPkt::unprotect(class ost::CryptoContext *)" 
> (address@hidden@ost@@address@hidden@@Z)
> 1>Debug/ccrtp1.dll : fatal error LNK1120: 6 unresolved externals
> 
> Could you help me to solve these problems? 
> Could you describe the compilation procedure under MSVC++ step-by-step?
> 
> Thank you in advance,
> Alex
> 
> 
> 
> 
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