Build Errors: LNK2019 & LNK1120 in QtVS 2015 Console Application project - visual-studio

Question

**I have a C++ API and corresponding library(api-140.lib) file, using this I am developing a GUI project in a Microsoft Visual Studio-2015 with Qt. First of all I am checking the code in console application.
Before Build the project, I done the below things,
*Entered the IP Address in Command Line argument,
Added the library file path to Properties->Linker->Additional Library Dirctories &
Added the library file in Properties->Linker->Input->Additional Dependencies*
During Build the project I struct with Linker errors. I am newbie to Qt & MSVS. Kindly guide me to rectify these error.[enter image description here][1]
My System details are below:
Windows 10 64 bit
VS-2015, Qt-5.6.0(qt-opensource-windows-x86-msvc2015_64-5.6.0)**
My C++ code:
main.cpp
#include <string>
#include <stdint.h>
#include <stdio.h>
#include <tchar.h>
#include <winsock2.h>
#include <QtCore/QCoreApplication>
#include "qtcpserver.h"
#pragma comment (lib, "Ws2_32.lib")
#ifdef _UNICODE
std::string convertToString(_TCHAR* textW)
{
std::string result;
int lenA = WideCharToMultiByte(CP_ACP, 0, textW, -1, 0, 0, NULL, NULL);
printf("lenA = %d\n", lenA);
if (lenA > 0)
{
char* textA = new char[lenA + 1]; // allocate a final null terminator as well
printf("textA = %p\n", textA);
WideCharToMultiByte(CP_ACP, 0, textW, -1, textA, lenA, NULL, NULL);
printf("%d\n", __LINE__);
textA[lenA] = 0; // Set the null terminator yourself
result = textA;
delete[] textA;
}
return result;
}
#endif
#define GE_COMMON_VERSION "2.4.1"
#define GE_OK 0
#define GE_ERROR 1
#define GE_OVERFLOW 2
#define GE_INVALID_PARAMETER 3
#define GE_RESOURCE_UNAVAILABLE 4
#define GE_FILE_IN_USE 5
#define GE_ADDRESS_EXISTS 6
#define GE_INVALID_ADDRESS 7
#define GE_NOT_EXISTING 8
#define GE_UNDERRUN 9
#define GE_ABORT 10
#define GE_COMMFAIL 11
#define GE_BUSY 12
#define GE_NO_ACCESS 13
#define GE_NOT_PERMITTED 14
#define GEC_SFPDP_RECORDER_VERSION "3.5.0"
#define GEC_SFPDP_RECORDER_SERVER_UNIX_SOCKET_FILE "/tmp/ge-sfpdp-server"
#define GEC_SFPDP_RECORDER_SERVER_TCP_PORT 8001
#define GEC_SFPDP_NO_WAIT_FOR_SYNC 0
#define GEC_SFPDP_WAIT_FOR_ANY_SYNC 1
#define GEC_SFPDP_PLAYBACK_WITHOUT_SIGNALS 0
#define GEC_SFPDP_PLAYBACK_WITH_UNTIMED_SIGNALS 1
#define GEC_SFPDP_PLAYBACK_WITH_TIMED_SIGNALS 2
#define GEC_SFPDP_512_WORDS_CYCLE 0
#define GEC_SFPDP_16K_WORDS_CYCLE 1
#define GEC_SFPDP_512K_WORDS_CYCLE 2
#define GEC_SFPDP_16M_WORDS_CYCLE 3
#define GEC_SFPDP_INTERNAL_CHANNEL_SYNC_MASTER_0 (1 << 0)
#define GEC_SFPDP_INTERNAL_CHANNEL_SYNC_MASTER_1 (1 << 1)
#define GEC_SFPDP_INTERNAL_CHANNEL_SYNC_MASTER_2 (1 << 2)
#define GEC_SFPDP_INTERNAL_CHANNEL_SYNC_MASTER_3 (1 << 3)
#define GEC_SFPDP_EXTERNAL_CHANNEL_SYNC_EXT0 (1 << 4)
#define GEC_SFPDP_EXTERNAL_CHANNEL_SYNC_EXT1 (1 << 5)
#define GEC_SFPDP_EXTERNAL_CHANNEL_SYNC_EXT2 (1 << 6)
#define GEC_SFPDP_EXTERNAL_CHANNEL_SYNC_EXT3 (1 << 7)
#define GEC_SFPDP_AUTOMATIC_CONTROL 0
#define GEC_SFPDP_MANUAL_CONTROL 1
#define GEC_SFPDP_START_CHANNEL_SYNC 0
#define GEC_SFPDP_PAUSE_CHANNEL_SYNC 1
#define GEC_SFPDP_STOP_CHANNEL_SYNC 2
enum {
GEC_SFPDP_1_0625_GBPS,
GEC_SFPDP_2_125_GBPS,
GEC_SFPDP_2_5_GBPS,
GEC_SFPDP_3_125_GBPS,
GEC_SFPDP_4_25_GBPS
};
class GEC_ISfpdpRecorder
{
public:
virtual int setIntChannelSyncControl(int mode) = 0;
virtual int setIntChannelSync(uint32_t iDevice, int masterMask, int action) = 0;
virtual int setChannelSyncOutput(uint32_t iDevice, int signal, int source) = 0;
virtual int reset() = 0;
virtual int create(std::string path, std::string name, uint32_t iDevice, uint32_t iPort, uint32_t& id) = 0;
virtual int open(std::string path, std::string name, uint32_t iDevice, uint32_t iPort, int mode, uint32_t& id) = 0;
virtual int destroy(uint32_t id) = 0;
virtual int setCRC(uint32_t id, bool enableCRC) = 0;
virtual int setCopyMode(uint32_t id, bool enable) = 0;
virtual int setWaitForSync(uint32_t id, int mode) = 0;
virtual int setMaxSize(uint32_t id, uint64_t sizeInBytes) = 0;
virtual int setLinkSpeed(uint32_t id, int speed) = 0;
virtual int setFlowControl(uint32_t id, bool enable) = 0;
virtual int setRateControl(uint32_t id, int cycleSize, uint32_t cyclePartsForTx) = 0;
virtual int setSimplexLinkMode(uint32_t id, bool enable) = 0;
virtual int setChannelSyncSource(uint32_t id, int source) = 0;
virtual int setSwapping(uint32_t id, bool enable8in16, bool enable16in32) = 0;
virtual int getStatus(uint32_t id, uint64_t& numBytes, std::string& state) = 0;
virtual int checkForOverflow(uint32_t id, bool& detected, bool clear) = 0;
virtual int startAll() = 0;
virtual int stopAll() = 0;
};
class GEC_SfpdpRecorderFactory
{
public:
static GEC_ISfpdpRecorder* createTcpBasedInstance(std::string address);
static void destroyTcpBasedInstance(GEC_ISfpdpRecorder* instance);
};
int _tmain(int argc, _TCHAR* argv[])
{
QCoreApplication a(argc, argv);
if (argc < 2) {
printf("ERROR: Missing argument with the IP address of the SFPDP Record Manager Server\n");
return -1;
}
// Initialize Winsock
WSADATA wsaData;
int result = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (result != 0) {
printf("WSAStartup failed with error: %d\n", result);
return -1;
}
int status = 0;
std::string ipAddress;
#ifdef _UNICODE
ipAddress = convertToString(argv[1]);
#else
ipAddress = argv[1];
#endif
GEC_ISfpdpRecorder* instance = GEC_SfpdpRecorderFactory::createTcpBasedInstance("ipAddress");
if (instance) {
int status = instance->reset();
printf("reset() returned %d as return code\n", status);
uint32_t id = 0;
status = instance->create("/data", "test", 0, 0, id);
printf("create() returned %d as return code\n", status);
printf(" and 0x%x as id\n", id);
status = instance->startAll();
printf("startAll() returned %d as return code\n", status);
uint64_t numBytesRecorded = 0;
std::string state;
status = instance->getStatus(id, numBytesRecorded, state);
printf("getStatus() returned %d as return code,\n", status);
printf(" %lld as number of recorded bytes,\n", numBytesRecorded);
printf(" and %s as state\n", state.c_str());
for (int i = 0; i < 12; ++i) {
Sleep(5000);
status = instance->getStatus(id, numBytesRecorded, state);
printf("getStatus() returned %d as return code,\n", status);
printf(" %lld as number of recorded bytes,\n", numBytesRecorded);
printf(" and %s as state\n", state.c_str());
}
status = instance->stopAll();
printf("stopAll() returned %d as return code\n", status);
status = instance->destroy(id);
printf("destroy() returned %d as return code\n", status);
GEC_SfpdpRecorderFactory::destroyTcpBasedInstance(instance);
}
WSACleanup();
return a.exec(),status;
}
Build Process:
1>------ Build started: Project: sfpdpgui1, Configuration: Debug x64 ------
1> Moc'ing sfpdpgui1.h...
1> moc_sfpdpgui1.cpp
1> main.cpp
1> sfpdpgui1.cpp
1> Generating Code...
1>main.obj : error LNK2019: unresolved external symbol "public: static class GEC_ISfpdpRecorder * __cdecl GEC_SfpdpRecorderFactory::createTcpBasedInstance(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?createTcpBasedInstance#GEC_SfpdpRecorderFactory##SAPEAVGEC_ISfpdpRecorder##V?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std###Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "public: static void __cdecl GEC_SfpdpRecorderFactory::destroyTcpBasedInstance(class GEC_ISfpdpRecorder *)" (?destroyTcpBasedInstance#GEC_SfpdpRecorderFactory##SAXPEAVGEC_ISfpdpRecorder###Z) referenced in function main
1>C:\Users\Vignesh\Documents\Visual Studio 2015\Projects\sfpdpgui1\x64\Debug\\sfpdpgui1.exe : fatal error LNK1120: 2 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Build Errors:
Severity Code Description Project File Line Suppression State
Error LNK2019 unresolved external symbol "public: static class GEC_ISfpdpRecorder * __cdecl GEC_SfpdpRecorderFactory::createTcpBasedInstance(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?createTcpBasedInstance#GEC_SfpdpRecorderFactory##SAPEAVGEC_ISfpdpRecorder##V?$basic_string#DU?$char_traits#D#std##V?$allocator#D#2##std###Z) referenced in function main sfpdpgui1 C:\Users\Vignesh\Documents\Visual Studio 2015\Projects\sfpdpgui1\sfpdpgui1\main.obj 1
Error LNK2019 unresolved external symbol "public: static void __cdecl GEC_SfpdpRecorderFactory::destroyTcpBasedInstance(class GEC_ISfpdpRecorder *)" (?destroyTcpBasedInstance#GEC_SfpdpRecorderFactory##SAXPEAVGEC_ISfpdpRecorder###Z) referenced in function main sfpdpgui1 C:\Users\Vignesh\Documents\Visual Studio 2015\Projects\sfpdpgui1\sfpdpgui1\main.obj 1
Error LNK1120 2 unresolved externals sfpdpgui1 C:\Users\Vignesh\Documents\Visual Studio 2015\Projects\sfpdpgui1\x64\Debug\\sfpdpgui1.exe 1
**Please find the link for Error image:**
[1]: https://i.stack.imgur.com/p2MY8.png