# cargo-ndk - Build Rust code for Android
This cargo extension handles all the environment configuration needed for successfully building libraries
for Android from a Rust codebase, with support for generating the correct `jniLibs` directory structure.
## Installing
```
cargo install cargo-ndk
```
You'll also need to install all the toolchains you intend to use. Simplest way is with the following:
```
rustup target add \
aarch64-linux-android \
armv7-linux-androideabi \
x86_64-linux-android \
i686-linux-android
```
Modify as necessary for your use case.
## Usage
If you have installed the NDK with Android Studio to its default location, `cargo ndk` will automatically detect
the most recent NDK version and use it. This can be overriden by specifying the path to the NDK root directory in
the `ANDROID_NDK_HOME` environment variable.
### Example: building a library for 32-bit and 64-bit ARM systems
```
cargo ndk -t armeabi-v7a -t arm64-v8a -o ./jniLibs build --release
```
This specifies the Android targets to be built, the output directory to use for placing the `.so` files in the layout
expected by Android, and then the ordinary flags to be passed to `cargo`.

### Supported hosts
- Linux
- macOS (x86_64 and arm64)
- Windows
## Similar projects
* [cargo-lipo](https://github.com/TimNN/cargo-lipo) - for building iOS universal Rust libraries
## License
This project is licensed under either of
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
---
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