ASAP Lab4 computer science C++ coding assignment

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Integrating Pytorch c++ (libtorch) in MS Visual Studio 2017

BoonBoon Tongbuasirilai Jun 18, 2019 · 3 min read

All about additional include directories and lib directories.

Requirements :

libtorch (V 1.1 / V 1.3 / V 1.5)

MS Visual Studio 2017 (lastest build)

Use pre-built libtorch from ‘ https://pytorch.org/ ’ (gpu[cuda] or cpu[none])

Get started Open in app

10/29/2020 Integrating Pytorch c++ (libtorch) in MS Visual Studio 2017 | by BoonBoon Tongbuasirilai | Medium

https://medium.com/@boonboontongbuasirilai/building-pytorch-c-integration-libtorch-with-ms-visual-studio-2017-44281f9921ea 2/5

1. Extract the downloaded zip file.

2. In VS2017 project property, Configuration must be either release or debug.

Platform must be x64 (pre-built files are in x64.)

1. In VC++ Directories and ‘C/C++ →Additional Include Directories’, add \path\to\libtorch\include and \path\to\libtorch\csrc\api\include .

10/29/2020 Integrating Pytorch c++ (libtorch) in MS Visual Studio 2017 | by BoonBoon Tongbuasirilai | Medium

https://medium.com/@boonboontongbuasirilai/building-pytorch-c-integration-libtorch-with-ms-visual-studio-2017-44281f9921ea 3/5

2. In Linker → Additional Library Directories, add \path\to\libtorch\lib .

3. In Linker → Input, add torch.lib; caffe2.lib; c10.lib [We need to explicitly tell VS2017 to link to these required libraries. For gpu version, please check in the ‘lib’

directory.].

4. In C/C++ →Language, change Conformance mode to No. This setting is to prevent some errors [‘std’: ambiguous symbol]

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For libtorch 1.3, there are some details for using this library. I got the response from

Mike Boedigheimer about how to make it works for libtorch 1.3. Thank you.

Mike Boedigheimer :

10/29/2020 Integrating Pytorch c++ (libtorch) in MS Visual Studio 2017 | by BoonBoon Tongbuasirilai | Medium

https://medium.com/@boonboontongbuasirilai/building-pytorch-c-integration-libtorch-with-ms-visual-studio-2017-44281f9921ea 4/5

This article doesn’t apply directly to Libtorch 1.3. The libraries you need appear to be

torch.lib;caffe2_nvrtc.lib;c10.lib;

You must also remember to copy the *.dlls into the directory from which you run the

executable

This seems sufficient for the dcgan.cpp example from pytorch_examples/cpp to run.

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For libtorch 1.5, here is the response from Chew Jing Wei.

For Libtorch 1.5, don’t bother adding caffe2.lib because it is not within the Libtorch

distribution.

Also, for building PyTorch C++ extensions you will have to add the path to Python

header files to your solution too. So, go to `Configuration Properties` -> `General` -

> `Additional Include Directories` then add the path to Python header files. To find

the header files, go to your Python root installation directory and see if there is a

`header` directory directly within it. In my case, the path was `D:\Users\…

\Anaconda3\include`

Also, add Python library DLLs. If you are trying to run your project using the debug

variant, you’ll need python37_d.lib. For some reason, that did not appear in my

Anaconda installation so I just ended up sticking with the release variant, which will

need python37.lib.

Windows 10 Pytorch C Language Machine Learning Deep Learning

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10/29/2020 Integrating Pytorch c++ (libtorch) in MS Visual Studio 2017 | by BoonBoon Tongbuasirilai | Medium

https://medium.com/@boonboontongbuasirilai/building-pytorch-c-integration-libtorch-with-ms-visual-studio-2017-44281f9921ea 5/5

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