sorry, my bad. It’s really painful for a non programmer to compile sth. I was grabbing the tag 0.2 file which is dated back to 2014. Now I clicked download — Download repository which seems to be more recent. those errors went away. However I still got these near the end the compilation:
1> [46/47] Link UE4Editor-m2uPlugin.dll
1> Creating library Z:\Unreal Projects\fbxBuilderTest\Plugins\m2u-m2uue4plugin-c7b6b17858a0\Intermediate/Build/Win64\UE4Editor\Development\UE4Editor-m2uPlugin.lib and object Z:\Unreal Projects\fbxBuilderTest\Plugins\m2u-m2uue4plugin-c7b6b17858a0\Intermediate/Build/Win64\UE4Editor\Development\UE4Editor-m2uPlugin.exp
1>m2uFbxFactory.cpp.obj : error LNK2019: unresolved external symbol “void * __cdecl fbxsdk::FbxMalloc(unsigned __int64)” (?FbxMalloc@fbxsdk@@YAPEAX_K@Z) referenced in function “public: void * __cdecl fbxsdk::FbxBaseAllocator::AllocateRecords(unsigned __int64)” (?AllocateRecords@FbxBaseAllocator@fbxsdk@@QEAAPEAX_K@Z)
1>m2uFbxFactory.cpp.obj : error LNK2019: unresolved external symbol “void __cdecl fbxsdk::FbxFree(void *)” (?FbxFree@fbxsdk@@YAXPEAX@Z) referenced in function “public: void __cdecl fbxsdk::FbxRedBlackTree<class fbxsdk::FbxMap<class fbxsdk::FbxString,class fbxsdk::FbxObject *,struct fbxsdk::FbxStringCompare,class fbxsdk::FbxBaseAllocator>::KeyValuePair,struct fbxsdk::FbxStringCompare,class fbxsdk::FbxBaseAllocator>::Clear(void)” (?Clear@?$FbxRedBlackTree@VKeyValuePair@?$FbxMap@VFbxString@fbxsdk@@PEAVFbxObject@2@UFbxStringCompare@2@VFbxBaseAllocator@2@@fbxsdk@@UFbxStringCompare@3@VFbxBaseAllocator@3@@fbxsdk@@QEAAXXZ)
1>m2uFbxFactory.cpp.obj : error LNK2019: unresolved external symbol “public: __cdecl fbxsdk::FbxString::FbxString(class fbxsdk::FbxString const &)” (??0FbxString@fbxsdk@@QEAA@AEBV01@@Z) referenced in function “public: __cdecl fbxsdk::FbxPair<class fbxsdk::FbxString const ,class fbxsdk::FbxObject *>::FbxPair<class fbxsdk::FbxString const ,class fbxsdk::FbxObject *>(class fbxsdk::FbxPair<class fbxsdk::FbxString const ,class fbxsdk::FbxObject *> const &)” (??0?$FbxPair@$$CBVFbxString@fbxsdk@@PEAVFbxObject@2@@fbxsdk@@QEAA@AEBV01@@Z)
1>m2uFbxFactory.cpp.obj : error LNK2019: unresolved external symbol “public: __cdecl fbxsdk::FbxString::~FbxString(void)” (??1FbxString@fbxsdk@@QEAA@XZ) referenced in function “public: __cdecl fbxsdk::FbxPair<class fbxsdk::FbxString const ,class fbxsdk::FbxObject *>::~FbxPair<class fbxsdk::FbxString const ,class fbxsdk::FbxObject *>(void)” (??1?$FbxPair@$$CBVFbxString@fbxsdk@@PEAVFbxObject@2@@fbxsdk@@QEAA@XZ)
1>m2uFbxFactory.cpp.obj : error LNK2019: unresolved external symbol "public: __cdecl fbxsdk::FbxString::operator char const *(void)const " (??BFbxString@fbxsdk@@QEBAPEBDXZ) referenced in function "public: int __cdecl fbxsdk::FbxStringCompare::operator()(class fbxsdk::FbxString const &,class fbxsdk::FbxString const &)const " (??RFbxStringCompare@fbxsdk@@QEBAHAEBVFbxString@1@0@Z)
1>m2uFbxFactory.cpp.obj : error LNK2019: unresolved external symbol "public: int __cdecl fbxsdk::FbxString::Compare(char const *)const " (?Compare@FbxString@fbxsdk@@QEBAHPEBD@Z) referenced in function "public: int __cdecl fbxsdk::FbxStringCompare::operator()(class fbxsdk::FbxString const &,class fbxsdk::FbxString const &)const " (??RFbxStringCompare@fbxsdk@@QEBAHAEBVFbxString@1@0@Z)
1>Z:\Unreal Projects\fbxBuilderTest\Plugins\m2u-m2uue4plugin-c7b6b17858a0\Binaries\Win64\UE4Editor-m2uPlugin.dll : fatal error LNK1120: 6 unresolved externals