M1 Macs, Rust & WASM

Getting setup for compiling Rust to WASM and serving w/ Trunk on M1 Mac.

1. Install wasm32-unknown-unknown target with rustup

   $ rustup target add wasm32-unknown-unknown
   

2. Install wasm-bindgen-cli

   $ cargo install --locked wasm-bindgen-cli
   

3. Test compiling a project w/ the new wasm target

   $ cargo build --target wasm32-unknown-unknown
   

   If this fails due to No available targets are compatible with triple “wasm32-unknown-unknown” #103, install an updated version of clang via Homebrew.

   Original version:

   $ clang --version
   Apple clang version 15.0.0 (clang-1500.3.9.4)
   Target: arm64-apple-darwin23.1.0
   Thread model: posix
   InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
   

   Update via Homebrew

   $ brew install llvm
   

   Use newer version from Brew

   export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
   export CC=/opt/homebrew/opt/llvm/bin/clang
   export AR=/opt/homebrew/opt/llvm/bin/llvm-ar
   

   Updated version:

   $ clang --version
   Homebrew clang version 17.0.6
   Target: arm64-apple-darwin23.1.0
   Thread model: posix
   InstalledDir: /opt/homebrew/opt/llvm/bin
   

References

Trunk

No available targets are compatible with triple “wasm32-unknown-unknown” #103

Unrelated project installation w/ notes on LLVM/Clang install