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SDK for C and C++ WebAssembly development based on Nix and LLVM
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README.md

wasi-sdk-nixos

WASM LLVM toolchain and WASI sysroot.

Similar to WebAssembly/wasi-sdk, but re-implemented for NixOS.

Goals

  • Lean C/C++ toolchain leveraging as much as possible from upstream sources.
  • Basic levels of WASI (no threading, no exceptions).

Versioning

Provided are the upstream versions that WebAssembly/wasi-sdk used mid 2024:

  • LLVM: 17
  • wasi-libc: 21

Future releases may upgrade these upstream versions.

Usage

The default package contains all required dependencies in the following package subdirectories:

  • bin: compilers (clang, clang++) and linker (wasm-ld)
  • include: libc headers
  • include/c++/v1: libcxx headers
  • lib: all libc and libcxx static libraries
  • lib/wasi: compiler-rt builtins static library
  • share/wasi-sysroot: the WASI sysroot

For concrete usage examples, see michaelfranzl/clang-wasm-browser-starterpack.