# MegEngine
English | [中文](README_CN.md)
MegEngine is a fast, scalable and easy-to-use deep learning framework, with auto-differentiation.
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## Installation
**NOTE:** MegEngine now supports Python installation on Linux-64bit/Windows-64bit/MacOS(CPU-Only)-10.14+ platforms with Python from 3.5 to 3.8. On Windows 10 you can either install the Linux distribution through [Windows Subsystem for Linux (WSL)](https://docs.microsoft.com/en-us/windows/wsl) or install the Windows distribution directly. Many other platforms are supported for inference.
### Binaries
To install the pre-built binaries via pip wheels:
```bash
python3 -m pip install megengine -f https://megengine.org.cn/whl/mge.html
```
## Building from Source
### Prerequisites
Most of the dependencies of MegEngine are located in [third_party](third_party) directory, which can be prepared by executing:
```bash
./third_party/prepare.sh
./third_party/install-mkl.sh
```
But some dependencies need to be installed manually:
* [CUDA](https://developer.nvidia.com/cuda-toolkit-archive)(>=10.1), [cuDNN](https://developer.nvidia.com/cudnn)(>=7.6) are required when building MegEngine with CUDA support.
* [TensorRT](https://docs.nvidia.com/deeplearning/sdk/tensorrt-archived/index.html)(>=5.1.5) is required when building with TensorRT support.
* LLVM/Clang(>=6.0) is required when building with Halide JIT support.
* Python(>=3.5) and numpy are required to build Python modules.
### Build
MegEngine uses CMake as the build tool.
We provide the following scripts to facilitate building.
* [host_build.sh](scripts/cmake-build/host_build.sh) builds MegEngine that runs on the same host machine (i.e., no cross compiling).
The following command displays the usage:
```
scripts/cmake-build/host_build.sh -h
```
* [cross_build_android_arm_inference.sh](scripts/cmake-build/cross_build_android_arm_inference.sh) builds MegEngine for DNN inference on Android-ARM platforms.
The following command displays the usage:
```
scripts/cmake-build/cross_build_android_arm_inference.sh -h
```
* [cross_build_linux_arm_inference.sh](scripts/cmake-build/cross_build_linux_arm_inference.sh) builds MegEngine for DNN inference on Linux-ARM platforms.
The following command displays the usage:
```
scripts/cmake-build/cross_build_linux_arm_inference.sh -h
```
* [cross_build_ios_arm_inference.sh](scripts/cmake-build/cross_build_ios_arm_inference.sh) builds MegEngine for DNN inference on iOS (iPhone/iPad) platforms.
The following command displays the usage:
```
scripts/cmake-build/cross_build_ios_arm_inference.sh
```
Please refer to [BUILD_README.md](scripts/cmake-build/BUILD_README.md) for more details.
## How to Contribute
* MegEngine adopts [Contributor Covenant](https://contributor-covenant.org) as a guideline to run our community. Please read the [Code of Conduct](CODE_OF_CONDUCT.md).
* Every contributor of MegEngine must sign a [Contributor License Agreement (CLA)](CONTRIBUTOR_LICENSE_AGREEMENT.md) to clarify the intellectual property license granted with the contributions.
* You can help improving MegEngine in many ways:
* Write code.
* Improve [documentation](https://github.com/MegEngine/Docs).
* Answer questions on [MegEngine Forum](https://discuss.megengine.org.cn), or Stack Overflow.
* Contribute new models in [MegEngine Model Hub](https://github.com/megengine/hub).
* Try a new idea on [MegStudio](https://studio.brainpp.com).
* Report or investigate [bugs and issues](https://github.com/MegEngine/MegEngine/issues).
* Review [Pull Requests](https://github.com/MegEngine/MegEngine/pulls).
* Star MegEngine repo.
* Cite MegEngine in your papers and articles.
* Recommend MegEngine to your friends.
* Any other form of contribution is welcomed.
We strive to build an open and friendly community. We aim to power humanity with AI.
## How to Contact Us
* Issue: [github.com/MegEngine/MegEngine/issues](https://github.com/MegEngine/MegEngine/issues)
* Email: [megengine-support@megvii.com](mailto:megengine-support@megvii.com)
* Forum: [discuss.megengine.org.cn](https://discuss.megengine.org.cn)
* QQ Group: 1029741705
* OPENI: [openi.org.cn/MegEngine](https://www.openi.org.cn/html/2020/Framework_0325/18.html)
## Resources
- [MegEngine](https://megengine.org.cn)
- [MegStudio](https://studio.brainpp.com)
- [Brain++](https://brainpp.megvii.com)
## License
MegEngine is Licensed under the Apache License, Version 2.0
Copyright (c) 2014-2021 Megvii Inc. All rights reserved.