how-to-cross-compile-chess-engines-with-rust

For these brief instructions, basic knowledge of the command line under Linux is required.

https://en.m.wikibooks.org/wiki/Linux_Guide/Using_the_shell

1. Install Android NDK (for example to /opt/android-ndk).
2. Add the following commands to the end of the .bashrc file in your home directory (Android NDK should be accessible from everywhere):
   export PATH=$PATH:/opt/android-ndk
export PATH=$PATH:/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin
3. Install required packages for Rust.
   apt-get update
apt-get install build-essential clang curl
4. Install Rust with the installer on https://rustup.rs/.
5. Add the necessary targets.
   rustup target add aarch64-linux-android
rustup target add armv7-linux-androideabi
rustup target add i686-linux-android
rustup target add x86_64-linux-android
6. Create a file named "config.toml" in the home directory under .cargo with the following content:

   [target.aarch64-linux-android]
   linker = "/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android21-clang"
   [target.armv7-linux-androideabi]
   linker = "/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/armv7a-linux-androideabi21-clang"
   [target.i686-linux-android]
   linker = "/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/i686-linux-android21-clang"
   [target.x86_64-linux-android]
   linker = "/opt/android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android21-clang"

7. To compile for the different architectures, use the following commands:
   cargo build --release --target=aarch64-linux-android
cargo build --release --target=armv7-linux-androideabi
cargo build --release --target=i686-linux-android
cargo build --release --target=x86_64-linux-android

To keep Rust up to date, run the rustup update command from time to time.