# ExecuTorch
Executorch is a PyTorch inference API for Edge Devices.

## Instructions

A prebuilt tar is included.

## Build

To build executorch you will require `cmake` and `python3`. You will also require `torch`.

```shell
# get executorch git
git clone --branch viable/strict https://github.com/pytorch/executorch.git /tmp/executorch
cd /tmp/executorch && git submodule sync && git submodule update --init

# copy missing files (monkey patch)
# We require these files for building execu
ls /usr/local/lib/python3.10/dist-packages/torchgen/packaged/ATen/native/
# This is a workaround for now
mkdir -p /usr/lib/python3/dist-packages/torchgen/packaged/ATen/native/
cp /usr/local/lib/python3.10/dist-packages/torchgen/packaged/ATen/native/* /usr/lib/python3/dist-packages/torchgen/packaged/ATen/native/
```

Run this Python Code
```python
import sysconfig
lib_path = sysconfig.get_paths()["purelib"]
print(lib_path)
```

Copy the LIB PATH into this `CMAKE_PREFIX_PATH` value
```shell
cd /tmp/executorch; CMAKE_PREFIX_PATH={lib_path} EXECUTORCH_BUILD_XNNPACK=ON bash ./install_executorch.sh --pybind xnnpack; echo "build completed"
```

Wait for build to complete.