setup.py build fails with LINK : error LNK2001: unresolved external symbol _DllMainCRTStartup

[quaesitor-scientiam]

The list of unresolved symbols below:

   Creating library build\temp.win-amd64-3.7\Release\tesserocr.cp37-win_amd64.lib and object build\temp.win-amd64-3.7\Release\tesserocr.cp37-win_amd64.exp
tesserocr.obj : error LNK2001: unresolved external symbol __CxxFrameHandler4
tesserocr.obj : error LNK2001: unresolved external symbol __security_check_cookie
tesserocr.obj : error LNK2001: unresolved external symbol __std_exception_destroy
tesserocr.obj : error LNK2001: unresolved external symbol "void __cdecl operator delete[](void *,unsigned __int64)" (??_V@YAXPEAX_K@Z)
tesserocr.obj : error LNK2001: unresolved external symbol "void * __cdecl operator new(unsigned __int64)" (??2@YAPEAX_K@Z)
tesserocr.obj : error LNK2001: unresolved external symbol _Query_perf_frequency
tesserocr.obj : error LNK2001: unresolved external symbol "void __cdecl std::_Xlength_error(char const *)" (?_Xlength_error@std@@YAXPEBD@Z)
tesserocr.obj : error LNK2001: unresolved external symbol "void __cdecl `eh vector destructor iterator'(void *,unsigned __int64,unsigned __int64,void (__cdecl*)(void *))" (??_M@YAXPEAX_K1P6AX0@Z@Z)
tesserocr.obj : error LNK2001: unresolved external symbol __std_exception_copy
tesserocr.obj : error LNK2001: unresolved external symbol atexit
tesserocr.obj : error LNK2001: unresolved external symbol "void __cdecl operator delete(void *,unsigned __int64)" (??3@YAXPEAX_K@Z)
tesserocr.obj : error LNK2001: unresolved external symbol "void * __cdecl operator new[](unsigned __int64)" (??_U@YAPEAX_K@Z)
tesserocr.obj : error LNK2001: unresolved external symbol __std_terminate
tesserocr.obj : error LNK2001: unresolved external symbol strchr
tesserocr.obj : error LNK2001: unresolved external symbol _Query_perf_counter
tesserocr.obj : error LNK2001: unresolved external symbol "const type_info::`vftable'" (??_7type_info@@6B@)
tesserocr.obj : error LNK2001: unresolved external symbol "void __cdecl `eh vector constructor iterator'(void *,unsigned __int64,unsigned __int64,void (__cdecl*)(void *),void (__cdecl*)(void *))" (??_L@YAXPEAX_K1P6AX0@Z2@Z)

The type of symbols that are missing seems to me be related this article by Microsoft on how DLLs should be written.

I not familiar with how the Python setup.py build works with this concept.

I am using Windows 10 Pro 64bit, Visual Studio 2019. I used vcpkg to pull everything related to tesseract 4.1.1 and have the necessary paths setup to point to the installed vcpkg includes and libs.

I tried the pip installed first but it choked on this same link error. I was hoping by building via source I might get better results.

Appreciate any help or pointers on how to resolve this.

Thanks

[zdenop]

Please follow instructions in https://github.com/sirfz/tesserocr/blob/master/Windows.build.md
This is the only supported way for windows tesserocr.
AFAIK vcpkg is able to create only static linked tesseract library which causes a lot of pain when linking....