Installation

To install Swift for WebAssembly toolchain, download one of the packages below and follow the instructions for your operating system.

Releases

SwiftWasm 5.7

Tag: swift-wasm-5.7.3-RELEASE

You can download the latest development snapshot from the Releases page

Using Downloads

macOS

An Xcode toolchain (.xctoolchain) includes a copy of the compiler, linker, and other related tools needed to provide a cohesive development experience for working in a specific version of Swift.

Requirements

• macOS 10.15 or later

Installation

1. Download the latest package release according to your CPU architecture (arm64 for Apple Silicon Macs, x86 for Intel Macs).
2. Run the package installer, which will install an Xcode toolchain into /Library/Developer/Toolchains/.
3. To use the Swift toolchain with command-line tools, use xcrun --toolchain swiftwasm or add the Swift toolchain to your path as follows:

export PATH=/Library/Developer/Toolchains/swift-latest.xctoolchain/usr/bin:"${PATH}"

4. Run swift --version. If you installed the toolchain successfully, you can get the following message.

$ swift --version
SwiftWasm Swift version 5.7.3 (swiftlang-5.7.3)
Target: x86_64-apple-darwin21.6.0

Warning: xcrun finds executable binary based on --toolchain option or TOOLCHAINS environment variable, but it also sets SDKROOT as host target SDK (e.g. MacOSX.sdk). So you need to specify -sdk option as /Library/Developer/Toolchains/swift-wasm-5.7.3-RELEASE.xctoolchain/usr/share/wasi-sysroot when launching swiftc from xcrun. swift build or other SwiftPM commands automatically find SDK path based on target triple, so they don't require to specify it.

Linux

Packages for Linux are tar archives including a copy of the Swift compiler, linker, and related tools. You can install them anywhere as long as the extracted tools are in your PATH.

Requirements

• Ubuntu 18.04 or 20.04 (64-bit)

Installation

1. Install required dependencies:

# Ubuntu 18.04
apt-get install \
          binutils \
          git \
          libc6-dev \
          libcurl4 \
          libedit2 \
          libgcc-5-dev \
          libpython2.7 \
          libsqlite3-0 \
          libstdc++-5-dev \
          libxml2 \
          pkg-config \
          tzdata \
          zlib1g-dev
# Ubuntu 20.04
apt-get install \
          binutils \
          git \
          gnupg2 \
          libc6-dev \
          libcurl4 \
          libedit2 \
          libgcc-9-dev \
          libpython2.7 \
          libsqlite3-0 \
          libstdc++-9-dev \
          libxml2 \
          libz3-dev \
          pkg-config \
          tzdata \
          zlib1g-dev

2. Download the latest binary release above.

The swift-wasm-<VERSION>-<PLATFORM>.tar.gz file is the toolchain itself.

3. Extract the archive with the following command:

tar xzf swift-wasm-<VERSION>-<PLATFORM>.tar.gz

This creates a usr/ directory in the location of the archive.

4. Add the Swift toolchain to your path as follows:

export PATH=$(pwd)/usr/bin:"${PATH}"

You can now execute the swiftc command to build Swift projects.

Docker

SwiftWasm offical Docker images are hosted on GitHub Container Registry.

SwiftWasm Dockerfiles are located on swiftwasm-docker repository.

Supported Platforms

• Ubuntu 18.04
• Ubuntu 20.04

Using Docker Images

1. Pull the Docker image from GitHub Container Registry:

docker pull ghcr.io/swiftwasm/swift:latest

2. Create a container using tag latest and attach it to the container:

docker run --rm -it ghcr.io/swiftwasm/swift:latest /bin/bash