Unresolved external symbol after building nglib

Hello, I have successfully built Netgen using Cmake GUI but when I am trying to build nglib project I got a bunch of “unresolved external symbol” errors. If I built nglib project as .lib I don’t get any errors.
Examples:
Error LNK2019 unresolved external symbol “void __cdecl netgen::STLSurfaceOptimization(class netgen::STLGeometry &,class netgen::Mesh &,class netgen::MeshingParameters const &;)” (?STLSurfaceOptimization@netgen@@YAXAEAVSTLGeometry@1@AEAVMesh@1@AEBVMeshingParameters@1@@z) referenced in function “enum nglib::Ng_Result __cdecl nglib::Ng_STL_GenerateSurfaceMesh(void * *,void * *,class nglib::Ng_Meshing_Parameters *)” (?Ng_STL_GenerateSurfaceMesh@nglib@@ya?AW4Ng_Result@1@PEAPEAX0PEAVNg_Meshing_Parameters@1@@z) nglib D:\Netgen\demo\build-vc14-64-debug\nglib.obj 1Error LNK2019 unresolved external symbol “void __cdecl netgen::STLMeshing(class netgen::STLGeometry &,class netgen::Mesh &,class netgen::MeshingParameters const &,class netgen::STLParameters const &;)” (?STLMeshing@netgen@@YAXAEAVSTLGeometry@1@AEAVMesh@1@AEBVMeshingParameters@1@AEBVSTLParameters@1@@z) referenced in function “enum nglib::Ng_Result __cdecl nglib::Ng_STL_MakeEdges(void * *,void * *,class nglib::Ng_Meshing_Parameters *)” (?Ng_STL_MakeEdges@nglib@@ya?AW4Ng_Result@1@PEAPEAX0PEAVNg_Meshing_Parameters@1@@z) nglib D:\Netgen\demo\build-vc14-64-debug\nglib.obj 1

I would appreciate any help.
Thank you.