Swift Android Toolchain 
Automated scripts to build Swift Android cross compilation toolchain for macOS
Installation
Prebuilt toolchains are located on Github Releases
Prepare environment (macOS x86_64 or macOS arm64)
- [IMPORTANT] Install XCode 13.0 and make it default in Command Line
- Install brew if needed
- Install tools, NDK and Swift Android Toolchain
# install system tools
brew install coreutils cmake wget
cd ~
mkdir android
cd android
# install ndk
wget https://dl.google.com/android/repository/android-ndk-r21e-darwin-x86_64.zip
unzip android-ndk-r21e-darwin-x86_64.zip
rm -rf android-ndk-r21e-darwin-x86_64.zip
# instal swift android toolchain
SWIFT_ANDROID=$(curl --silent "https://api.github.com/repos/readdle/swift-android-toolchain/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
wget https://github.com/readdle/swift-android-toolchain/releases/latest/download/swift-android-$SWIFT_ANDROID.zip
unzip swift-android-$SWIFT_ANDROID.zip
rm -rf swift-android-$SWIFT_ANDROID.zip
swift-android-$SWIFT_ANDROID/bin/swift-android tools --update
ln -sfn swift-android-$SWIFT_ANDROID swift-android-current
unset SWIFT_ANDROID
- Setup environment variables by putting this to .profile
export ANDROID_NDK_HOME=$HOME/android/android-ndk-r21e
export SWIFT_ANDROID_HOME=$HOME/android/swift-android-current
export PATH=$ANDROID_NDK_HOME:$PATH
export PATH=$SWIFT_ANDROID_HOME/bin:$SWIFT_ANDROID_HOME/build-tools/current:$PATH
- Include .profile to your .bashrc or .zshrc if needed by adding this line
source $HOME/.profile
Build and Test swift modules
Our current swift build system is tiny wrapper over Swift PM. See Swift PM docs for more info.
| Command | Description |
|---|---|
| swift package clean | Clean build folder |
| swift package update | Update dependencies |
| swift-build | Build all products |
| swift-build --build-tests | Build all products and tests |
swift-build wrapper scripts works as swift build from swift package manager but configured for android. So you can add any extra params like -Xswiftc -DDEBUG , -Xswiftc -suppress-warnings or --configuration release
Example of compilation flags:
Debug
swift-build --configuration debug \
-Xswiftc -DDEBUG \
-Xswiftc -Xfrontend -Xswiftc -experimental-disable-objc-attr
Release
swift-build --configuration release \
-Xswiftc -Xfrontend -Xswiftc -experimental-disable-objc-attr \
-Xswiftc -Xllvm -Xswiftc -sil-disable-pass=array-specialize
Build swift modules with Android Studio
This plugin integrates Swift Android Toolchain to Gradle