Gaze SDK C Api Windows 64bit fail to link

[Xuezhong Wang]

hi,

I found that the samples come with the SDK is actually for 32-bit as it’s using the 32 bit lib file in the settings. However, after I changed that to 64 bit version, it still fails in link stage. error reported are:
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1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_destroy referenced in function “private: void __thiscall CEyeTrackingEngine::Reset(void)” (?Reset@CEyeTrackingEngine@@AAEXXZ)
1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_register_error_callback referenced in function “private: bool __thiscall CEyeTrackingEngine::InitializeEyeTracker(void)” (?InitializeEyeTracker@CEyeTrackingEngine@@AAE_NXZ)
1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_create referenced in function “private: bool __thiscall CEyeTrackingEngine::InitializeEyeTracker(void)” (?InitializeEyeTracker@CEyeTrackingEngine@@AAE_NXZ)
1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_get_connected_eye_tracker referenced in function “private: bool __thiscall CEyeTrackingEngine::InitializeEyeTracker(void)” (?InitializeEyeTracker@CEyeTrackingEngine@@AAE_NXZ)
1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_connect_async referenced in function “private: void __thiscall CEyeTrackingEngine::BeginConnectEyeTracker(void)” (?BeginConnectEyeTracker@CEyeTrackingEngine@@AAEXXZ)
1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_break_event_loop referenced in function “private: void __thiscall CEyeTrackingEngine::StopEventLoop(void)” (?StopEventLoop@CEyeTrackingEngine@@AAEXXZ)
1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_start_tracking_async referenced in function “private: static void __cdecl CEyeTrackingEngine::OnConnectFinished(enum tobiigaze_error_code,void *)” (?OnConnectFinished@CEyeTrackingEngine@@CAXW4tobiigaze_error_code@@PAX@Z)
1>EyeTrackingEngine.obj : error LNK2019: unresolved external symbol __imp__tobiigaze_run_event_loop referenced in function “private: static unsigned long __stdcall CEyeTrackingEngine::EventLoop(void *)” (?EventLoop@CEyeTrackingEngine@@CGKPAX@Z)
=======================================================================
I compared the two lib files (32 bit and 64 bit) and found that there is a difference in the name of those symbols, for example:

Version : 0
Machine : 14C (x86)
TimeDateStamp: 53C78301 Thu Jul 17 04:02:09 2014
SizeOfData : 00000037
DLL name : TobiiGazeCore32.dll
Symbol name : _tobiigaze_register_error_callback
Type : code
Name type : no prefix
Hint : 58
Name : tobiigaze_register_error_callback

Version : 0
Machine : 8664 (x64)
TimeDateStamp: 53C782AE Thu Jul 17 04:00:46 2014
SizeOfData : 00000036
DLL name : TobiiGazeCore64.dll
Symbol name : tobiigaze_register_error_callback
Type : code
Name type : name
Hint : 58
Name : tobiigaze_register_error_callback

There is an additional underscore for the symbols in 32 bit lib file. And the 32 bit samples compile with no problem.

Is there something I missed in setting or “TobiiGazeCore64.lib” is not correct?

[Xuezhong Wang]

Alright, the lib file is ok. I forget to change the build platform to x64.

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