Error on installing setup.py (Windows)

[HannahHaensen]

System: Windows 11 Python 3.9 Pytroch 1.10 cuda version 11.3 RTX 3070

lietorch installation works but droid_backend fails with:

droid_kernels.obj : error LNK2001: unresolved external symbol "public: long * __cdecl at::TensorBase::data_ptr<long>(void)const " (??$data_ptr@J@TensorBase@at@@QEBAPEAJXZ)
build\lib.win-amd64-3.9\droid_backends.cp39-win_amd64.pyd : fatal error LNK1120: 1 unresolved externals
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.29.30133\\bin\\HostX86\\x64\\link.exe' failed with exit code 1120

When I run setup.py to install droid_backend and lietroch I run into the a lot of warnings e.g.

C:/Users/hanna/Documents/GitHub/DROIDSLAM/venv/lib/site-packages/torch/include\c10/util/Optional.h(432): warning C4624: "c10::trivially_copyable_optimization_optional_base<T>": The destrcutor was deleted implicitly or defined as deleted
        with
        [
            T=std::vector<at::Tensor,std::allocator<at::Tensor>>
        ]

[HannahHaensen]

already investigated this: https://discuss.pytorch.org/t/mysterious-link-error-seen-by-multiple-people-while-building-cpp-cuda-extensions/91533/3

but ran into this, maybe it will work, but I wanted to ask if there is in general a better way to do it on windows

LINK : the 32-bit linker (C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX86\x64\link.exe) ran out of heap space and is going to restart linking with a 64-bit
 linker
LINK : restarting link with 64-bit linker `C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\link.exe'

[hodakagoto]

Hi @HannahHaensen I am having the same problem.

but ran into this, maybe it will work,

Can you tell me how to do that in detail? Thank you.

[denred0]

@hodakagoto just replace long with int64_t in the droid_kernels.cu file.

[hodakagoto]

@denred0 Thank you. Installation has been successful. I appreciate your help.