OpenSSL Unresolved External Symbol LNK2019 When Compiling Synergy in VS2013 - c++

First, let me start by saying I've read EVERY post, link, answer, etc I can find that points to Linking/External Symbol errors in Visual Studio/C++. With that said, here are the 27 errors I'm getting:
1>SecureSocket.obj : error LNK2019: unresolved external symbol CRYPTO_free referenced in function "private: void __cdecl SecureSocket::showCertificate(void)" (?showCertificate#SecureSocket##AEAAXXZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol OPENSSL_add_all_algorithms_noconf referenced in function "private: void __cdecl SecureSocket::initContext(bool)" (?initContext#SecureSocket##AEAAX_N#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol X509_free referenced in function "private: void __cdecl SecureSocket::showCertificate(void)" (?showCertificate#SecureSocket##AEAAXXZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol X509_NAME_oneline referenced in function "private: void __cdecl SecureSocket::showCertificate(void)" (?showCertificate#SecureSocket##AEAAXXZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol X509_get_subject_name referenced in function "private: void __cdecl SecureSocket::showCertificate(void)" (?showCertificate#SecureSocket##AEAAXXZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_CTX_new referenced in function "private: void __cdecl SecureSocket::initContext(bool)" (?initContext#SecureSocket##AEAAX_N#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_CTX_free referenced in function "public: virtual __cdecl SecureSocket::~SecureSocket(void)" (??1SecureSocket##UEAA#XZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_set_fd referenced in function "private: bool __cdecl SecureSocket::secureAccept(int)" (?secureAccept#SecureSocket##AEAA_NH#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_CTX_use_PrivateKey_file referenced in function "public: void __cdecl SecureSocket::loadCertificates(char const *)" (?loadCertificates#SecureSocket##QEAAXPEBD#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_CTX_use_certificate_file referenced in function "public: void __cdecl SecureSocket::loadCertificates(char const *)" (?loadCertificates#SecureSocket##QEAAXPEBD#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_load_error_strings referenced in function "private: void __cdecl SecureSocket::initContext(bool)" (?initContext#SecureSocket##AEAAX_N#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_get_peer_certificate referenced in function "private: void __cdecl SecureSocket::showCertificate(void)" (?showCertificate#SecureSocket##AEAAXXZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_CTX_check_private_key referenced in function "public: void __cdecl SecureSocket::loadCertificates(char const *)" (?loadCertificates#SecureSocket##QEAAXPEBD#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_new referenced in function "private: void __cdecl SecureSocket::createSSL(void)" (?createSSL#SecureSocket##AEAAXXZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_free referenced in function "public: virtual __cdecl SecureSocket::~SecureSocket(void)" (??1SecureSocket##UEAA#XZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_accept referenced in function "private: bool __cdecl SecureSocket::secureAccept(int)" (?secureAccept#SecureSocket##AEAA_NH#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_connect referenced in function "private: bool __cdecl SecureSocket::secureConnect(int)" (?secureConnect#SecureSocket##AEAA_NH#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_read referenced in function "public: virtual unsigned int __cdecl SecureSocket::secureRead(void *,unsigned int)" (?secureRead#SecureSocket##UEAAIPEAXI#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_write referenced in function "public: virtual unsigned int __cdecl SecureSocket::secureWrite(void const *,unsigned int)" (?secureWrite#SecureSocket##UEAAIPEBXI#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_get_error referenced in function "private: void __cdecl SecureSocket::checkResult(int,bool &,bool &)" (?checkResult#SecureSocket##AEAAXHAEA_N0#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSLv23_server_method referenced in function "private: void __cdecl SecureSocket::initContext(bool)" (?initContext#SecureSocket##AEAAX_N#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSLv23_client_method referenced in function "private: void __cdecl SecureSocket::initContext(bool)" (?initContext#SecureSocket##AEAAX_N#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_shutdown referenced in function "public: virtual __cdecl SecureSocket::~SecureSocket(void)" (??1SecureSocket##UEAA#XZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol SSL_library_init referenced in function "private: void __cdecl SecureSocket::initContext(bool)" (?initContext#SecureSocket##AEAAX_N#Z)
1>SecureSocket.obj : error LNK2019: unresolved external symbol ERR_get_error referenced in function "private: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl SecureSocket::getError(void)" (?getError#SecureSocket##AEAA?AV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std##XZ)
1>SecureSocket.obj : error LNK2019: unresolved external symbol ERR_error_string_n referenced in function "private: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl SecureSocket::getError(void)" (?getError#SecureSocket##AEAA?AV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std##XZ)
1>C:\Users\ME\Downloads\synergy-master\synergy-master\lib\MinSizeRel\ns.dll : fatal error LNK1120: 26 unresolved externals
Some background: I've downloaded Synergy from their GitHub and built it without error. Getting it to build took a small amount of hacking because they don't officially support Visual Studio 2013, but not overly difficult. I also built is using the latest Qt instead of the one they provide on their site (2010) I'm also using OpenSSL from SLProWeb, 32-bit full version.
Anyway, I cleared up a minor error or two in their code and tried to compile it first from command line, and second with VS GUI. Both spit out the 27 errors shown above. As I said, I've searched high and low trying to figure out what I've done wrong, but ultimately found nothing. I copied ssleay32.lib and libeay32.lib, with their .dlls, into the /ext/openssl/out32dll folder, where Synergy looks, which didn't work, so I pointed the linker additional libraries directory to it manually and also added it to the additional includes, and added the two .libs to Input>Additional Dependencies. Still no good.
In a last ditch effort, I added this to the top:
#pragma comment(lib, "libeay32.lib")
#pragma comment(lib, "ssleay32.lib")
#pragma comment(lib, "libeay32MD.lib")
#pragma comment(lib, "libeay32MDd.lib")
#pragma comment(lib, "libeay32MT.lib")
#pragma comment(lib, "libeay32MTd.lib")
#pragma comment(lib, "ssleay32MD.lib")
#pragma comment(lib, "ssleay32MDd.lib")
#pragma comment(lib, "ssleay32MT.lib")
#pragma comment(lib, "ssleay32MTd.lib")
while also copying the rest of the libs into the out32dll folder. This proved that it know the files existed, but still refused to resolve the External Symbol issue.
To me, it looks like it isn't properly loading libeay32.lib, which contains the crypto portion of OpenSSL that the compiler complains about....

Related

ASIOSDK; Error when building mex file from hostsample.cpp

I'm writing a c++ file to build into mex, but I got the unsolved external symbol errors with asio function like "ASIOExit". I'm building in Matlab console with mex command.
I've put all headfiles and cppfiles from the AsioSDK. into one folder ad used -I to include that folder. What else do I need to include or link?
The 3 headfiles related to ASIO has already been added in include.
#include "asiosys.h"
#include "asio.h"
#include "asiodrivers.h"
Error using mex Creating library hostsample.lib and object
hostsample.exp hostsample.obj : error LNK2019: unresolved external
symbol "long __cdecl ASIOInit(struct ASIODriverInfo *)"
(?ASIOInit##YAJPEAUASIODriverInfo###Z) referenced in function
mexFunction hostsample.obj : error LNK2019: unresolved external symbol
"long __cdecl ASIOExit(void)" (?ASIOExit##YAJXZ) referenced in
function mexFunction hostsample.obj : error LNK2019: unresolved
external symbol "long __cdecl ASIOStart(void)" (?ASIOStart##YAJXZ)
referenced in function mexFunction hostsample.obj : error LNK2019:
unresolved external symbol "long __cdecl ASIOStop(void)"
(?ASIOStop##YAJXZ) referenced in function mexFunction hostsample.obj :
error LNK2019: unresolved external symbol "long __cdecl
ASIOGetChannels(long *,long *)" (?ASIOGetChannels##YAJPEAJ0#Z)
referenced in function "long __cdecl init_asio_static_data(struct
DriverInfo *)" (?init_asio_static_data##YAJPEAUDriverInfo###Z)
hostsample.obj : error LNK2019: unresolved external symbol "long
__cdecl ASIOGetLatencies(long *,long *)" (?ASIOGetLatencies##YAJPEAJ0#Z) referenced in function "long __cdecl
create_asio_buffers(struct DriverInfo *)"
(?create_asio_buffers##YAJPEAUDriverInfo###Z) hostsample.obj : error
LNK2019: unresolved external symbol "long __cdecl
ASIOGetBufferSize(long *,long *,long *,long *)"
(?ASIOGetBufferSize##YAJPEAJ000#Z) referenced in function "long
__cdecl init_asio_static_data(struct DriverInfo *)" (?init_asio_static_data##YAJPEAUDriverInfo###Z) hostsample.obj : error
LNK2019: unresolved external symbol "long __cdecl
ASIOGetSampleRate(double *)" (?ASIOGetSampleRate##YAJPEAN#Z)
referenced in function "long __cdecl init_asio_static_data(struct
DriverInfo *)" (?init_asio_static_data##YAJPEAUDriverInfo###Z)
hostsample.obj : error LNK2019: unresolved external symbol "long
__cdecl ASIOSetSampleRate(double)" (?ASIOSetSampleRate##YAJN#Z) referenced in function "long
__cdecl init_asio_static_data(struct DriverInfo *)" (?init_asio_static_data##YAJPEAUDriverInfo###Z) hostsample.obj : error
LNK2019: unresolved external symbol "long __cdecl
ASIOGetSamplePosition(struct ASIOSamples *,struct ASIOTimeStamp *)"
(?ASIOGetSamplePosition##YAJPEAUASIOSamples##PEAUASIOTimeStamp###Z)
referenced in function "void __cdecl bufferSwitch(long,long)"
(?bufferSwitch##YAXJJ#Z) hostsample.obj : error LNK2019: unresolved
external symbol "long __cdecl ASIOGetChannelInfo(struct
ASIOChannelInfo *)" (?ASIOGetChannelInfo##YAJPEAUASIOChannelInfo###Z)
referenced in function "long __cdecl create_asio_buffers(struct
DriverInfo *)" (?create_asio_buffers##YAJPEAUDriverInfo###Z)
hostsample.obj : error LNK2019: unresolved external symbol "long
__cdecl ASIOCreateBuffers(struct ASIOBufferInfo *,long,long,struct ASIOCallbacks *)"
(?ASIOCreateBuffers##YAJPEAUASIOBufferInfo##JJPEAUASIOCallbacks###Z)
referenced in function "long __cdecl create_asio_buffers(struct
DriverInfo *)" (?create_asio_buffers##YAJPEAUDriverInfo###Z)
hostsample.obj : error LNK2019: unresolved external symbol "long
__cdecl ASIODisposeBuffers(void)" (?ASIODisposeBuffers##YAJXZ) referenced in function mexFunction hostsample.obj : error LNK2019:
unresolved external symbol "long __cdecl ASIOOutputReady(void)"
(?ASIOOutputReady##YAJXZ) referenced in function "struct ASIOTime *
__cdecl bufferSwitchTimeInfo(struct ASIOTime *,long,long,class std::vector
,class std::allocator > > >)"
(?bufferSwitchTimeInfo##YAPEAUASIOTime##PEAU1#JJV?$vector#V?$vector#NV?$allocator#N#std###std##V?$allocator#V?$vector#NV?$allocator#N#std###std###2##std###Z)
hostsample.obj : error LNK2019: unresolved external symbol
__imp_timeGetTime referenced in function "struct ASIOTime * __cdecl bufferSwitchTimeInfo(struct ASIOTime *,long,long,class
std::vector
,class std::allocator > > >)"
(?bufferSwitchTimeInfo##YAPEAUASIOTime##PEAU1#JJV?$vector#V?$vector#NV?$allocator#N#std###std##V?$allocator#V?$vector#NV?$allocator#N#std###std###2##std###Z)
hostsample.obj : error LNK2019: unresolved external symbol "public:
void __cdecl AsioDrivers::removeCurrentDriver(void)"
(?removeCurrentDriver#AsioDrivers##QEAAXXZ) referenced in function
mexFunction hostsample.obj : error LNK2019: unresolved external symbol
"bool __cdecl loadAsioDriver(char *)" (?loadAsioDriver##YA_NPEAD#Z)
referenced in function mexFunction hostsample.obj : error LNK2019:
unresolved external symbol "struct ASIOTime * __cdecl
bufferSwitchTimeInfo(struct ASIOTime *,long,long)"
(?bufferSwitchTimeInfo##YAPEAUASIOTime##PEAU1#JJ#Z) referenced in
function "void __cdecl bufferSwitch(long,long)"
(?bufferSwitch##YAXJJ#Z) hostsample.obj : error LNK2019: unresolved
external symbol "class AsioDrivers * asioDrivers"
(?asioDrivers##3PEAVAsioDrivers##EA) referenced in function
mexFunction hostsample.mexw64 : fatal error LNK1120: 19 unresolved
externals
OK looks like I haven't included all the cpp and h files in the solution.

Static QT unresolved external symbol

I've been trying to build using static qt for a while but i can't get rid of these errors .
<QtGuiApplication4> (29 items)
Error LNK2019: unresolved external symbol _FT_New_Face referenced in function "public: static class QStringList __cdecl QBasicFontDatabase::addTTFile(class QByteArray const &,class QByteArray const &)" (?addTTFile#QBasicFontDatabase##SA?AVQStringList##ABVQByteArray##0#Z)
Error LNK2019: unresolved external symbol _FT_Get_PS_Font_Info referenced in function "public: bool __thiscall QFontEngineFT::init(struct QFontEngine::FaceId,bool,enum QFontEngine::GlyphFormat,class QFreetypeFace *)" (?init#QFontEngineFT##QAE_NUFaceId#QFontEngine##_NW4GlyphFormat#3#PAVQFreetypeFace###Z)
Error LNK2019: unresolved external symbol _FT_Load_Sfnt_Table referenced in function "bool __cdecl ft_getSfntTable(void *,unsigned int,unsigned char *,unsigned int *)" (?ft_getSfntTable##YA_NPAXIPAEPAI#Z)
Error LNK2019: unresolved external symbol _FT_GlyphSlot_Oblique referenced in function "public: virtual void __thiscall QFontEngineFT::addGlyphsToPath(unsigned int *,struct QFixedPoint *,int,class QPainterPath *,class QFlags<enum QTextItem::RenderFlag>)" (?addGlyphsToPath#QFontEngineFT##UAEXPAIPAUQFixedPoint##HPAVQPainterPath##V?$QFlags#W4RenderFlag#QTextItem#####Z)
Error LNK2019: unresolved external symbol _FT_GlyphSlot_Embolden referenced in function "public: virtual void __thiscall QFontEngineFT::addGlyphsToPath(unsigned int *,struct QFixedPoint *,int,class QPainterPath *,class QFlags<enum QTextItem::RenderFlag>)" (?addGlyphsToPath#QFontEngineFT##UAEXPAIPAUQFixedPoint##HPAVQPainterPath##V?$QFlags#W4RenderFlag#QTextItem#####Z)
Error LNK2019: unresolved external symbol _FT_Outline_Get_Bitmap referenced in function "public: struct QFontEngineFT::Glyph * __thiscall QFontEngineFT::loadGlyph(struct QFontEngineFT::QGlyphSet *,unsigned int,struct QFixed,enum QFontEngine::GlyphFormat,bool)const " (?loadGlyph#QFontEngineFT##QBEPAUGlyph#1#PAUQGlyphSet#1#IUQFixed##W4GlyphFormat#QFontEngine##_N#Z)
Error LNK2019: unresolved external symbol _FT_Outline_Transform referenced in function "public: struct QFontEngineFT::Glyph * __thiscall QFontEngineFT::loadGlyph(struct QFontEngineFT::QGlyphSet *,unsigned int,struct QFixed,enum QFontEngine::GlyphFormat,bool)const " (?loadGlyph#QFontEngineFT##QBEPAUGlyph#1#PAUQGlyphSet#1#IUQFixed##W4GlyphFormat#QFontEngine##_N#Z)
Error LNK2019: unresolved external symbol _FT_Outline_Translate referenced in function "public: struct QFontEngineFT::Glyph * __thiscall QFontEngineFT::loadGlyph(struct QFontEngineFT::QGlyphSet *,unsigned int,struct QFixed,enum QFontEngine::GlyphFormat,bool)const " (?loadGlyph#QFontEngineFT##QBEPAUGlyph#1#PAUQGlyphSet#1#IUQFixed##W4GlyphFormat#QFontEngine##_N#Z)
Error LNK2019: unresolved external symbol _FT_Vector_Transform referenced in function "public: struct QFontEngineFT::Glyph * __thiscall QFontEngineFT::loadGlyph(struct QFontEngineFT::QGlyphSet *,unsigned int,struct QFixed,enum QFontEngine::GlyphFormat,bool)const " (?loadGlyph#QFontEngineFT##QBEPAUGlyph#1#PAUQGlyphSet#1#IUQFixed##W4GlyphFormat#QFontEngine##_N#Z)
Error LNK2019: unresolved external symbol _FT_MulFix referenced in function "public: bool __thiscall QFontEngineFT::init(struct QFontEngine::FaceId,bool,enum QFontEngine::GlyphFormat,class QFreetypeFace *)" (?init#QFontEngineFT##QAE_NUFaceId#QFontEngine##_NW4GlyphFormat#3#PAVQFreetypeFace###Z)
Error LNK2019: unresolved external symbol _FT_MulDiv referenced in function "void __cdecl scaleOutline(struct FT_FaceRec_ *,struct FT_GlyphSlotRec_ *,long,long)" (?scaleOutline##YAXPAUFT_FaceRec_##PAUFT_GlyphSlotRec_##JJ#Z)
Error LNK2019: unresolved external symbol _FT_Get_Char_Index referenced in function "public: virtual unsigned int __thiscall QFontEngineFT::glyphIndex(unsigned int)const " (?glyphIndex#QFontEngineFT##UBEII#Z)
Error LNK2019: unresolved external symbol _FT_Set_Charmap referenced in function "public: static class QFreetypeFace * __cdecl QFreetypeFace::getFace(struct QFontEngine::FaceId const &,class QByteArray const &)" (?getFace#QFreetypeFace##SAPAV1#ABUFaceId#QFontEngine##ABVQByteArray###Z)
Error LNK2019: unresolved external symbol _FT_Matrix_Multiply referenced in function "public: struct QFontEngineFT::Glyph * __thiscall QFontEngineFT::loadGlyph(struct QFontEngineFT::QGlyphSet *,unsigned int,struct QFixed,enum QFontEngine::GlyphFormat,bool)const " (?loadGlyph#QFontEngineFT##QBEPAUGlyph#1#PAUQGlyphSet#1#IUQFixed##W4GlyphFormat#QFontEngine##_N#Z)
Error LNK2019: unresolved external symbol _FT_Get_Postscript_Name referenced in function "public: struct QFontEngine::Properties __thiscall QFreetypeFace::properties(void)const " (?properties#QFreetypeFace##QBE?AUProperties#QFontEngine##XZ)
Error LNK2019: unresolved external symbol _FT_Load_Glyph referenced in function "public: virtual void __thiscall QFontEngineFT::addGlyphsToPath(unsigned int *,struct QFixedPoint *,int,class QPainterPath *,class QFlags<enum QTextItem::RenderFlag>)" (?addGlyphsToPath#QFontEngineFT##UAEXPAIPAUQFixedPoint##HPAVQPainterPath##V?$QFlags#W4RenderFlag#QTextItem#####Z)
Error LNK2019: unresolved external symbol _FT_Set_Char_Size referenced in function "public: static class QFreetypeFace * __cdecl QFreetypeFace::getFace(struct QFontEngine::FaceId const &,class QByteArray const &)" (?getFace#QFreetypeFace##SAPAV1#ABUFaceId#QFontEngine##ABVQByteArray###Z)
Error LNK2019: unresolved external symbol _FT_Select_Size referenced in function "public: void __thiscall QFreetypeFace::computeSize(struct QFontDef const &,int *,int *,bool *)" (?computeSize#QFreetypeFace##QAEXABUQFontDef##PAH1PA_N#Z)
Error LNK2019: unresolved external symbol _FT_Done_FreeType referenced in function "public: __thiscall QtFreetypeData::~QtFreetypeData(void)" (??1QtFreetypeData##QAE#XZ)
Error LNK2019: unresolved external symbol _FT_Init_FreeType referenced in function "public: static class QFreetypeFace * __cdecl QFreetypeFace::getFace(struct QFontEngine::FaceId const &,class QByteArray const &)" (?getFace#QFreetypeFace##SAPAV1#ABUFaceId#QFontEngine##ABVQByteArray###Z)
Error LNK2001: unresolved external symbol _FT_Get_Sfnt_Table
Error LNK2019: unresolved external symbol _FT_Get_Sfnt_Table referenced in function "public: static class QStringList __cdecl QBasicFontDatabase::addTTFile(class QByteArray const &,class QByteArray const &)" (?addTTFile#QBasicFontDatabase##SA?AVQStringList##ABVQByteArray##0#Z)
Error LNK2001: unresolved external symbol _FT_Done_Face
Error LNK2019: unresolved external symbol _FT_Done_Face referenced in function "public: static class QStringList __cdecl QBasicFontDatabase::addTTFile(class QByteArray const &,class QByteArray const &)" (?addTTFile#QBasicFontDatabase##SA?AVQStringList##ABVQByteArray##0#Z)
Error LNK2001: unresolved external symbol _FT_New_Memory_Face
Error LNK2019: unresolved external symbol _FT_New_Memory_Face referenced in function "public: static class QStringList __cdecl QBasicFontDatabase::addTTFile(class QByteArray const &,class QByteArray const &)" (?addTTFile#QBasicFontDatabase##SA?AVQStringList##ABVQByteArray##0#Z)
Error LNK2001: unresolved external symbol _FT_New_Face
Error LNK2019: unresolved external symbol _FT_Set_Transform referenced in function "public: virtual void __thiscall QFontEngineFT::getUnscaledGlyph(unsigned int,class QPainterPath *,struct glyph_metrics_t *)" (?getUnscaledGlyph#QFontEngineFT##UAEXIPAVQPainterPath##PAUglyph_metrics_t###Z)
Error LNK1120: 24 unresolved externals
I am using these libraries :
ws2_32.lib
imm32.lib
winmm.lib
qtharfbuzzng.lib
qtpcre.lib
Qt5PlatformSupport.lib
qwindows.lib
opengl32.lib
Can any of you explain me what i am doing wrong ? Thank you.
I've had the exact same issue. You're missing the freetype library qtfreetype.lib.
Add the following line to your .pro file
LIBS += -lqtfreetype
You need QtCore and QtGui at a minimum for this. QString is in QtCore and QGuiApplication is in QtGui. If your Qt usage is restricted to user interface activities, that might be enough. Otherwise, for each class that's failing to link, look in Qt Assistant. The "qmake" note at the top of the page says which library contains that class.
For instance, for Qstring, it has "qmake: QT += core". For Visual Studio on Windows, the actual filenames for the "core" library are Qt5Core.dll (release) Qt5Cored.dll (debug).
Added my case, hope this will helpful.
I'm lost one CPP file in the library project
Be careful when compilation (Lib & Project) has different option MT/MD options

I get error LNK2019 when I try to compile zeromq sources

I'm trying to compile the zeromq sources and I have the following error:
I'm using Visual studio 2013 update 4 / windows 7 x64
First of all I compile the libsodium library satisfactorily.
Then I link the libsodium header files directory path to additional dependencies and libsodium.lib to additional library directories. I also specify the name of library in additional dependencies.
I try to compile it under win32 architecture and x64 architecture but I get the same errors.
I know that a __imp prefix is used as a bridge to the function that I want to use so if I linked the libraries appropiately why do I get this error?
Console log:
1>Creating library E:\zmq\libzmq\builds\msvc\vs2013\libzmq\..\..\..\..\bin\Win32\Debug\v120\dynamic\libzmq.lib and object E:\zmq\libzmq\builds\msvc\vs2013\libzmq\..\..\..\..\bin\Win32\Debug\v120\dynamic\libzmq.exp
1>ctx.obj : error LNK2019: unresolved external symbol __imp__randombytes_close referenced in function "public: __thiscall zmq::ctx_t::~ctx_t(void)" (??1ctx_t#zmq##QAE#XZ)
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__sodium_init referenced in function "public: __thiscall zmq::curve_client_t::curve_client_t(struct zmq::options_t const &)" (??0curve_client_t#zmq##QAE#ABUoptions_t#1##Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__sodium_init
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__crypto_box_keypair referenced in function "public: __thiscall zmq::curve_client_t::curve_client_t(struct zmq::options_t const &)" (??0curve_client_t#zmq##QAE#ABUoptions_t#1##Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__crypto_box_keypair
1>zmq_utils.obj : error LNK2001: unresolved external symbol __imp__crypto_box_keypair
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__crypto_box_beforenm referenced in function "private: int __thiscall zmq::curve_client_t::process_welcome(unsigned char const *,unsigned int)" (?process_welcome#curve_client_t#zmq##AAEHPBEI#Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__crypto_box_beforenm
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__crypto_box referenced in function "private: int __thiscall zmq::curve_client_t::produce_hello(class zmq::msg_t *)" (?produce_hello#curve_client_t#zmq##AAEHPAVmsg_t#2##Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__crypto_box
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__crypto_box_open referenced in function "private: int __thiscall zmq::curve_client_t::process_welcome(unsigned char const *,unsigned int)" (?process_welcome#curve_client_t#zmq##AAEHPBEI#Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__crypto_box_open
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__crypto_box_afternm referenced in function "public: virtual int __thiscall zmq::curve_client_t::encode(class zmq::msg_t *)" (?encode#curve_client_t#zmq##UAEHPAVmsg_t#2##Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__crypto_box_afternm
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__crypto_box_open_afternm referenced in function "public: virtual int __thiscall zmq::curve_client_t::decode(class zmq::msg_t *)" (?decode#curve_client_t#zmq##UAEHPAVmsg_t#2##Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__crypto_box_open_afternm
1>curve_client.obj : error LNK2019: unresolved external symbol __imp__randombytes referenced in function "private: int __thiscall zmq::curve_client_t::produce_initiate(class zmq::msg_t *)" (?produce_initiate#curve_client_t#zmq##AAEHPAVmsg_t#2##Z)
1>curve_server.obj : error LNK2001: unresolved external symbol __imp__randombytes
1>curve_server.obj : error LNK2019: unresolved external symbol __imp__crypto_secretbox referenced in function "private: int __thiscall zmq::curve_server_t::produce_welcome(class zmq::msg_t *)" (?produce_welcome#curve_server_t#zmq##AAEHPAVmsg_t#2##Z)
1>curve_server.obj : error LNK2019: unresolved external symbol __imp__crypto_secretbox_open referenced in function "private: int __thiscall zmq::curve_server_t::process_initiate(class zmq::msg_t *)" (?process_initiate#curve_server_t#zmq##AAEHPAVmsg_t#2##Z)
Thanks in advance.
You're probably compiling libsodium in a static way.
Try to compile it dinamically and link it again.
Such errors are also able to occur when you have a wrong set calling convention at your project.

Unable to build OSG Earth with Visual Studio 2013 due to ODBC link error in GDAL

I am trying to build OSGEarth using CMAKE and Visual studio 2013
I first downloaded Open Scene Graph 3.2 and the prebuild dependencies (small package) from this page. I generated the visual studio 2013 project and build/installed Open Scene Graph without much problem
After that, I downloaded the source of osgearth 2.5 and generated the Visual Studio 2013 project, using the same dependencies as for Open Scene Graph (I don't want to use the optional dependencies for the first build) and when I try to build the osgEarth project, I got the following error at the linking step :
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLAllocConnect#8 referenced in function "public: int __thiscall CPLODBCSession::EstablishSession(char const *,char const *,char const *)" (?EstablishSession#CPLODBCSession##QAEHPBD00#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLAllocEnv#4 referenced in function "public: int __thiscall CPLODBCSession::EstablishSession(char const *,char const *,char const *)" (?EstablishSession#CPLODBCSession##QAEHPBD00#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLAllocStmt#8 referenced in function "public: __thiscall CPLODBCStatement::CPLODBCStatement(class CPLODBCSession *)" (??0CPLODBCStatement##QAE#PAVCPLODBCSession###Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLColAttribute#28 referenced in function "public: int __thiscall CPLODBCStatement::CollectResultsInfo(void)" (?CollectResultsInfo#CPLODBCStatement##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLColumns#36 referenced in function "public: int __thiscall CPLODBCStatement::GetColumns(char const *,char const *,char const *)" (?GetColumns#CPLODBCStatement##QAEHPBD00#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLConnect#28 referenced in function "public: int __thiscall CPLODBCSession::EstablishSession(char const *,char const *,char const *)" (?EstablishSession#CPLODBCSession##QAEHPBD00#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLDescribeCol#36 referenced in function "public: int __thiscall CPLODBCStatement::CollectResultsInfo(void)" (?CollectResultsInfo#CPLODBCStatement##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLDisconnect#4 referenced in function "public: int __thiscall CPLODBCSession::CloseSession(void)" (?CloseSession#CPLODBCSession##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLEndTran#12 referenced in function "public: int __thiscall CPLODBCSession::CommitTransaction(void)" (?CommitTransaction#CPLODBCSession##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLError#32 referenced in function "public: int __thiscall CPLODBCSession::Failed(int,void *)" (?Failed#CPLODBCSession##QAEHHPAX#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLExecDirect#12 referenced in function "public: int __thiscall CPLODBCStatement::ExecuteSQL(char const *)" (?ExecuteSQL#CPLODBCStatement##QAEHPBD#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLFetch#4 referenced in function "public: int __thiscall CPLODBCStatement::Fetch(int,int)" (?Fetch#CPLODBCStatement##QAEHHH#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLFetchScroll#12 referenced in function "public: int __thiscall CPLODBCStatement::Fetch(int,int)" (?Fetch#CPLODBCStatement##QAEHHH#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLFreeConnect#4 referenced in function "public: int __thiscall CPLODBCSession::CloseSession(void)" (?CloseSession#CPLODBCSession##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLFreeEnv#4 referenced in function "public: int __thiscall CPLODBCSession::CloseSession(void)" (?CloseSession#CPLODBCSession##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLFreeStmt#8 referenced in function "public: __thiscall CPLODBCStatement::~CPLODBCStatement(void)" (??1CPLODBCStatement##QAE#XZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLGetConnectAttr#20 referenced in function "public: int __thiscall CPLODBCSession::ClearTransaction(void)" (?ClearTransaction#CPLODBCSession##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLGetData#24 referenced in function "public: int __thiscall CPLODBCStatement::Fetch(int,int)" (?Fetch#CPLODBCStatement##QAEHHH#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLNumResultCols#8 referenced in function "public: int __thiscall CPLODBCStatement::CollectResultsInfo(void)" (?CollectResultsInfo#CPLODBCStatement##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLSetConnectAttr#16 referenced in function "public: int __thiscall CPLODBCSession::ClearTransaction(void)" (?ClearTransaction#CPLODBCSession##QAEHXZ)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLSetConnectOption#12 referenced in function "public: int __thiscall CPLODBCSession::EstablishSession(char const *,char const *,char const *)" (?EstablishSession#CPLODBCSession##QAEHPBD00#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLTables#36 referenced in function "public: int __thiscall CPLODBCStatement::GetTables(char const *,char const *)" (?GetTables#CPLODBCStatement##QAEHPBD0#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLDriverConnect#32 referenced in function "public: int __thiscall CPLODBCSession::EstablishSession(char const *,char const *,char const *)" (?EstablishSession#CPLODBCSession##QAEHPBD00#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLPrimaryKeys#28 referenced in function "public: int __thiscall CPLODBCStatement::GetPrimaryKeys(char const *,char const *,char const *)" (?GetPrimaryKeys#CPLODBCStatement##QAEHPBD00#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLRemoveDriver#12 referenced in function "public: int __thiscall CPLODBCDriverInstaller::RemoveDriver(char const *,int)" (?RemoveDriver#CPLODBCDriverInstaller##QAEHPBDH#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLInstallerError#20 referenced in function "public: int __thiscall CPLODBCDriverInstaller::InstallDriver(char const *,char const *,unsigned short)" (?InstallDriver#CPLODBCDriverInstaller##QAEHPBD0G#Z)
2>gdal.lib(cpl_odbc.obj) : error LNK2019: unresolved external symbol _SQLInstallDriverEx#28 referenced in function "public: int __thiscall CPLODBCDriverInstaller::InstallDriver(char const *,char const *,unsigned short)" (?InstallDriver#CPLODBCDriverInstaller##QAEHPBD0G#Z)
The only think I was able to find is that all the missing method seems to be deprecated ODBC method, like this one
For additional information, the project got a reference to odbc32.lib in its inherited values.
Okay, stupid question... the odbc's dependencies were in the inherited values... but the checkbox indicated to the build process to use these dependencies was not checked. Once it was done, everything is good... I think I need either a coffee or a very big smack on the head...

Problems with linking CEF3

I'm having some problems with using CEF in my application which uses the MD/MDd runtime library linking.
I have downloaded the latest build of CEF3 from cefbuilds.com and followed the instructions How to link CEF against a different run-time library.
I have built the "libcef_dll_wrapper" project after changing "Runtime Library" to "/MDd" and "Platform Toolset" to "v110" and then I've linked the resulting "libcef_dll_wrapper.lib" binary to my project.
However, when I try to build my project I get the following errors:
12>html.lib(html_producer.obj) : error LNK2019: unresolved external symbol _cef_string_utf16_clear referenced in function "public: static void __cdecl CefBrowserSettingsTraits::clear(struct _cef_browser_settings_t *)" (?clear#CefBrowserSettingsTraits##SAXPAU_cef_browser_settings_t###Z)
12>html.lib(html_producer.obj) : error LNK2019: unresolved external symbol _cef_string_utf8_to_utf16 referenced in function "public: static bool __cdecl CefStringTraitsUTF16::from_string(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,struct _cef_string_utf16_t *)" (?from_string#CefStringTraitsUTF16##SA_NABV?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std##PAU_cef_string_utf16_t###Z)
12>html.lib(html_producer.obj) : error LNK2019: unresolved external symbol _cef_string_list_free referenced in function "public: static void __cdecl CefSettingsTraits::clear(struct _cef_settings_t *)" (?clear#CefSettingsTraits##SAXPAU_cef_settings_t###Z)
12>html.lib(html_producer.obj) : error LNK2019: unresolved external symbol "public: static bool __cdecl CefBrowser::CreateBrowser(class CefWindowInfo &,class CefRefPtr<class CefClient>,class CefStringBase<struct CefStringTraitsUTF16> const &,class CefStructBase<struct CefBrowserSettingsTraits> const &)" (?CreateBrowser#CefBrowser##SA_NAAVCefWindowInfo##V?$CefRefPtr#VCefClient####ABV?$CefStringBase#UCefStringTraitsUTF16####ABV?$CefStructBase#UCefBrowserSettingsTraits#####Z) referenced in function "public: void __thiscall caspar::html::html_producer::run(void)" (?run#html_producer#html#caspar##QAEXXZ)
12>html.lib(html_producer.obj) : error LNK2019: unresolved external symbol "bool __cdecl CefInitialize(class CefStructBase<struct CefSettingsTraits> const &,class CefRefPtr<class CefApp>)" (?CefInitialize##YA_NABV?$CefStructBase#UCefSettingsTraits####V?$CefRefPtr#VCefApp#####Z) referenced in function "public: void __thiscall caspar::html::html_producer::run(void)" (?run#html_producer#html#caspar##QAEXXZ)
12>libcef_dll_wrapper.lib(libcef_dll_wrapper.obj) : error LNK2019: unresolved external symbol __imp__cef_execute_process referenced in function "int __cdecl CefExecuteProcess(class CefMainArgs const &,class CefRefPtr<class CefApp>)" (?CefExecuteProcess##YAHABVCefMainArgs##V?$CefRefPtr#VCefApp#####Z)
12>libcef_dll_wrapper.lib(libcef_dll_wrapper.obj) : error LNK2019: unresolved external symbol __imp__cef_initialize referenced in function "bool __cdecl CefInitialize(class CefMainArgs const &,class CefStructBase<struct CefSettingsTraits> const &,class CefRefPtr<class CefApp>)" (?CefInitialize##YA_NABVCefMainArgs##ABV?$CefStructBase#UCefSettingsTraits####V?$CefRefPtr#VCefApp#####Z)
12>libcef_dll_wrapper.lib(libcef_dll_wrapper.obj) : error LNK2019: unresolved external symbol __imp__cef_shutdown referenced in function "void __cdecl CefShutdown(void)" (?CefShutdown##YAXXZ)
12>libcef_dll_wrapper.lib(libcef_dll_wrapper.obj) : error LNK2019: unresolved external symbol __imp__cef_do_message_loop_work referenced in function "void __cdecl CefDoMessageLoopWork(void)" (?CefDoMessageLoopWork##YAXXZ)
12>libcef_dll_wrapper.lib(libcef_dll_wrapper.obj) : error LNK2019: unresolved external symbol __imp__cef_run_message_loop referenced in function "void __cdecl CefRunMessageLoop(void)" (?CefRunMessageLoop##YAXXZ)
The full log can be found here.
Any ideas as to what I might be missing?
Are you also libcef.lib in the linker input?