[Caffe2] Failed to build dispatch_test. Error LNK2001: unresolved external symbol

[xkszltl]

Issue description

Getting LNK2001 on Windows for dispatch_test.

pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj" (default target) (56) ->
(Link target) -> 
  KernelRegistration.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: __cdecl caffe2::TypeIdentifier::TypeIdentifier(unsigned short)" (__imp_??0TypeIdentifier@caffe2@@AEAA@G@Z) [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]
  OpSchema.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: __cdecl caffe2::TypeIdentifier::TypeIdentifier(unsigned short)" (__imp_??0TypeIdentifier@caffe2@@AEAA@G@Z) [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]
  OpSchemaRegistration.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: __cdecl caffe2::TypeIdentifier::TypeIdentifier(unsigned short)" (__imp_??0TypeIdentifier@caffe2@@AEAA@G@Z) [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]
  OpSchema_test.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: __cdecl caffe2::TypeIdentifier::TypeIdentifier(unsigned short)" (__imp_??0TypeIdentifier@caffe2@@AEAA@G@Z) [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]
  Dispatcher.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: __cdecl caffe2::TypeIdentifier::TypeIdentifier(unsigned short)" (__imp_??0TypeIdentifier@caffe2@@AEAA@G@Z) [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]
  DispatchKey.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: __cdecl caffe2::TypeIdentifier::TypeIdentifier(unsigned short)" (__imp_??0TypeIdentifier@caffe2@@AEAA@G@Z) [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]
  DispatchTable.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: __cdecl caffe2::TypeIdentifier::TypeIdentifier(unsigned short)" (__imp_??0TypeIdentifier@caffe2@@AEAA@G@Z) [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]
  pytorch\build\bin\RelWithDebInfo\dispatch_test.exe : fatal error LNK1120: 1 unresolved externals [pytorch\build\caffe2\core\dispatch\dispatch_test.vcxproj]

System Info

• PyTorch or Caffe2: C2
• How you installed PyTorch (conda, pip, source): src
• Build command you used (if compiling from source): cmake
• OS: Win10
• PyTorch version: master
• VS version (if compiling from source): 2017
• CMake version: 3.12